Anderson Steven P.

SEC source: 0000899243-21-037790 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,662,455

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-037790 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 6,563,089

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 1,980,288 shares of Class B common stock directly held by BIE; (ii) 4,039,490 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-037790 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 6,940,586

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 1,980,288 shares of Class B common stock directly held by BIE; (ii) 4,039,490 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-037790 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 1,980,288 shares of Class B common stock directly held by BIE; (ii) 4,039,490 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-037790 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On September 23, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 1,980,288 shares of Class B common stock directly held by BIE; (ii) 4,039,490 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-034592 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,284,958

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-034592 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,767,037

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,376,341 shares of Class B common stock directly held by BIE; (ii) 4,847,385 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-034592 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 8,144,534

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,376,341 shares of Class B common stock directly held by BIE; (ii) 4,847,385 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-034592 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,376,341 shares of Class B common stock directly held by BIE; (ii) 4,847,385 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-034592 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On August 27, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,376,341 shares of Class B common stock directly held by BIE; (ii) 4,847,385 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-031594 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,907,461

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-031594 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 8,970,985

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,772,394 shares of Class B common stock directly held by BIE; (ii) 5,655,280 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-031594 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 9,348,482

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,772,394 shares of Class B common stock directly held by BIE; (ii) 5,655,280 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-031594 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,772,394 shares of Class B common stock directly held by BIE; (ii) 5,655,280 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-031594 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On August 2, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 2,772,394 shares of Class B common stock directly held by BIE; (ii) 5,655,280 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-027886 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,529,964

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-027886 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 10,174,933

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,168,447 shares of Class B common stock directly held by BIE; (ii) 6,463,175 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-027886 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 10,552,430

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,168,447 shares of Class B common stock directly held by BIE; (ii) 6,463,175 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-027886 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,168,447 shares of Class B common stock directly held by BIE; (ii) 6,463,175 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-027886 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On July 6, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,168,447 shares of Class B common stock directly held by BIE; (ii) 6,463,175 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-023236 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,152,467

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-023236 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 11,378,881

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,564,500 shares of Class B common stock directly held by BIE; (ii) 7,271,070 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-023236 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 11,756,378

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,564,500 shares of Class B common stock directly held by BIE; (ii) 7,271,070 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-023236 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,564,500 shares of Class B common stock directly held by BIE; (ii) 7,271,070 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-023236 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On June 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,564,500 shares of Class B common stock directly held by BIE; (ii) 7,271,070 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)). The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-018495 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,774,970

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-018495 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 12,582,829

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,960,553 shares of Class B common stock directly held by BIE; (ii) 8,078,965 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-018495 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 12,960,326

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,960,553 shares of Class B common stock directly held by BIE; (ii) 8,078,965 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-018495 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,960,553 shares of Class B common stock directly held by BIE; (ii) 8,078,965 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-018495 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On May 4, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 3,960,553 shares of Class B common stock directly held by BIE; (ii) 8,078,965 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-015649 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,397,473

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-015649 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 13,786,777

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,356,606 shares of Class B common stock directly held by BIE; (ii) 8,886,860 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-015649 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 14,164,274

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,356,606 shares of Class B common stock directly held by BIE; (ii) 8,886,860 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-015649 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,356,606 shares of Class B common stock directly held by BIE; (ii) 8,886,860 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-015649 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On April 9, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,356,606 shares of Class B common stock directly held by BIE; (ii) 8,886,860 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-012239 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,019,976

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-012239 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 14,990,725

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,752,659 shares of Class B common stock directly held by BIE; (ii) 9,694,755 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-012239 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 15,368,222

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,752,659 shares of Class B common stock directly held by BIE; (ii) 9,694,755 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-012239 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,752,659 shares of Class B common stock directly held by BIE; (ii) 9,694,755 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-012239 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On March 15, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 4,752,659 shares of Class B common stock directly held by BIE; (ii) 9,694,755 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-007117 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,642,479

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-007117 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 16,194,673

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,148,712 shares of Class B common stock directly held by BIE; (ii) 10,502,650 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-007117 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 16,572,170

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,148,712 shares of Class B common stock directly held by BIE; (ii) 10,502,650 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-007117 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,148,712 shares of Class B common stock directly held by BIE; (ii) 10,502,650 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-007117 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On February 16, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,148,712 shares of Class B common stock directly held by BIE; (ii) 10,502,650 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-003330 · doc4.xml · derivative · entry 5

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,264,982

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.direct: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · ownership.direct: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-003330 · doc4.xml · derivative · entry 4

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 17,398,621

Underlying: Class A Common Stock · 377,497 shares

Expires not disclosed

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F1 · kind: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · kind: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · shares: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F8 · shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F8 · derivative.underlying_shares: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

F1 · ownership.nature: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,544,765 shares of Class B common stock directly held by BIE; (ii) 11,310,545 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-003330 · doc4.xml · derivative · entry 3

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 17,776,118

Underlying: Class A Common Stock · 826,451 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_price: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F5 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Class B Common Stock will convert automatically into Class A Common Stock on the earlier of (i) the date on which the number of outstanding shares of Class B Common Stock represents less than 10% of the aggregate combined number of outstanding shares of Class A Common Stock and Class B Common Stock; (ii) ten years following the effective date of the Issuer's initial public offering; or (iii) the date specified by vote of the holders of a majority of the outstanding shares of Class B Common Stock, voting as a single class.

F6 · derivative.exercise_date: In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock (i) upon any transfer, whether or not for value (subject to certain exceptions), or (ii) in the event of the death or disability (as defined in the amended and restated certificate of incorporation of the Issuer) of the reporting person, shares of Class B Common Stock held by the reporting person or the reporting person's permitted estate planning entities will convert into Class A Common Stock.

F7 · derivative.expiration_date: Not Applicable.

F1 · ownership.nature: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,544,765 shares of Class B common stock directly held by BIE; (ii) 11,310,545 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

F8 · ownership.nature: These Class B shares were distributed to BVA 2009 and BIEA, and then distributed to, and are held directly by the Reporting Person, Steven Anderson. Row 1, Column 9 includes Class B shares distributed to, and held directly by, Steven Anderson.

SEC source: 0000899243-21-003330 · doc4.xml · nonDerivative · entry 2

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

F1 · kind: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,544,765 shares of Class B common stock directly held by BIE; (ii) 11,310,545 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.

SEC source: 0000899243-21-003330 · doc4.xml · nonDerivative · entry 1

Anderson Steven P. · CIK 0001719971 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 826,451

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: BV 2009 converted 554,731 shares from Class B to Class A common stock prior to the distribution of the Class A shares to the non-managing members of BV 2009.

F4 · shares: BIE converted 271,720 shares from Class B to Class A common stock prior to their distribution of the Class A shares to the non-managing members of BIE.

F1 · ownership.nature: On January 22, 2021: (i) Baseline Ventures 2009, LLC ("BV 2009") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Ventures 2009 Associates, LLC ("BVA 2009")). BVA 2009 is the managing member of BV 2009. Steven Anderson is the sole member of BVA 2009. (ii) Baseline Increased Exposure Fund, LLC ("BIE") distributed Class A common stock to its non-managing members and Class B common stock to its managing member (Baseline Increased Exposure Fund Associates, LLC ("BIEA")). Steven Anderson is the sole member of BIEA. (iii) BVA 2009 and BIEA in turn distributed Class B common stock to Steven Anderson.

F2 · ownership.nature: Following the distribution, the shares held indirectly by the Reporting Person are follows: (i) 5,544,765 shares of Class B common stock directly held by BIE; (ii) 11,310,545 shares of Class B common stock directly held by BV 2009; (iii) 277,911 shares of Class B common stock held directly by Baseline Cable Car, LLC; (iv) 265,400 shares of Class B common stock held by Baseline Encore, L.P. ("BE"). Baseline Encore Associates, LLC ("BEA") is the general partner of BE. Steven Anderson is the sole member of BCC and BEA. Steven Anderson is a Member of BIE and through such Membership interest indirectly owns up to 54,893 shares of Class B common stock through such membership interest in BIE (out of the shares that BIE owns referenced in (i)) The Reporting Person disclaims beneficial ownership of the securities except to the extent of its pecuniary interest therein.