GILLIS STEVEN

SEC source: 0000899243-22-023070 · doc4.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,000

Underlying: Common Stock · 18,000 shares

Expires 2032-06-15

F1 · derivative.exercise_date: This option shall vest and become exercisable on the earlier of June 15, 2023 or the day immediately prior to the date of the Issuer's next annual meeting of stockholders occurring after the date of grant, in either case subject to the Reporting Person continuing in service on the Board as a Non-Employee Director through such vesting date.

SEC source: 0000899243-22-007013 · doc4.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,750

Underlying: Common Stock · 8,750 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of common stock.

F2 · derivative.exercise_date: On February 16, 2022, the reporting person was granted 8,750 restricted stock units, which vest on the first anniversary of the grant date.

F2 · derivative.expiration_date: On February 16, 2022, the reporting person was granted 8,750 restricted stock units, which vest on the first anniversary of the grant date.

SEC source: 0001493152-22-002784 · ownership.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Shares · 100,000 shares

Expires 2032-01-27

F1 · derivative.exercise_date: The reporting person is a participant in the Issuer's Incentive Plan (the "Plan"). The board of directors of the Issuer approved the option grant on January 27, 2022 (the "Grant Date"). The options were granted pursuant to that certain option agreement entered into by and between the Issuer and the reporting person, dated January 27, 2022 (the "Option Agreement"). The options vest and become exercisable in 12 equal monthly installments beginning on the first day of the month following the Grant Date, subject to the reporting person's employment on the relevant vesting date.

F2 · derivative.expiration_date: The options expire 10 years from the Grant Date unless terminated sooner in accordance with the Plan or the Option Agreement.

SEC source: 0000899243-21-032264 · doc4.xml · derivative · entry 1

ARCH Venture Fund XI, L.P. · CIK 0001831802 · 10% owner · Member of 10% owner group

ARCH Venture Partners XI, L.P. · CIK 0001847567 · 10% owner

ARCH Venture Partners XI, LLC · CIK 0001847601 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through DA32 Sponsor LLC

Disclosed balance after: 4,465,000

Underlying: Class A Common Stock · 701,250 shares

Expires not disclosed

F1 · derivative.exercise_price: The shares of Class B Common Stock are convertible into shares of the Issuer's Class A Common Stock as described under the heading "Description of Shares" in the Issuer's Registration Statement on Form S-1 (File No. 333-257679) (the "Registration Statement") and have no expiration date.

F2 · kind: On August 5, 2021, DA32 Sponsor LLC ("Sponsor") forfeited 701,250 shares of Class B Common Stock to the Issuer for no consideration in connection with the underwriters' election to forfeit their overallotment option on August 4, 2021. The forfeiture was not within the Reporting Persons' control as it occurred exclusively due to the underwriters' decision not to exercise the overallotment option and occurred shortly after the Issuer filed the final statutory prospectus for the initial public offering (the "IPO") disclosing all material information about the Issuer and the IPO.

F1 · derivative.exercise_date: The shares of Class B Common Stock are convertible into shares of the Issuer's Class A Common Stock as described under the heading "Description of Shares" in the Issuer's Registration Statement on Form S-1 (File No. 333-257679) (the "Registration Statement") and have no expiration date.

F1 · derivative.expiration_date: The shares of Class B Common Stock are convertible into shares of the Issuer's Class A Common Stock as described under the heading "Description of Shares" in the Issuer's Registration Statement on Form S-1 (File No. 333-257679) (the "Registration Statement") and have no expiration date.

F2 · derivative.underlying_shares: On August 5, 2021, DA32 Sponsor LLC ("Sponsor") forfeited 701,250 shares of Class B Common Stock to the Issuer for no consideration in connection with the underwriters' election to forfeit their overallotment option on August 4, 2021. The forfeiture was not within the Reporting Persons' control as it occurred exclusively due to the underwriters' decision not to exercise the overallotment option and occurred shortly after the Issuer filed the final statutory prospectus for the initial public offering (the "IPO") disclosing all material information about the Issuer and the IPO.

F3 · ownership.nature: This Form 4 is filed jointly by ARCH Venture Fund XI, L.P. ("AVF"), ARCH Venture Partners XI, L.P. ("AVP LP"), ARCH Venture Partners XI, LLC ("AVP LLC"), Kristina Burow, Robert Nelsen and Steven Gillis (collectively, the "Reporting Persons"). Keith Crandell has direct ownership of the Issuer's Class B Common Stock, as well as indirect pecuniary ownership of the Issuer's Class A Common Stock and Class B Common Stock and is filing his own Form 4 separately. Burow, Crandell, Nelsen and Gillis comprise the investment committee of AVP LLC (the AVP X Committee Members). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.

F4 · ownership.nature: As a managing member of Sponsor, AVF may be deemed to beneficially own the securities owned directly by Sponsor. As the sole general partner of AVF, AVP LP may be deemed to beneficially own the securities owned directly by Sponsor. As the sole general partner of AVP LP, AVP LLC may be deemed to beneficially own securities owned directly by Sponsor. As the members of the investment committee, each of the AVP X Committee Members may be deemed to beneficially own securities owned directly by Sponsor. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.

SEC source: 0000899243-21-031417 · doc4.xml · nonDerivative · entry 2

ARCH Venture Fund XI, L.P. · CIK 0001831802 · 10% owner

ARCH Venture Partners XI, L.P. · CIK 0001847567 · 10% owner

ARCH Venture Partners XI, LLC · CIK 0001847601 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Through A32 ponsor LC

Disclosed balance after: 2,250,000

F4 · security: As a managing member of Sponsor, AVF may be deemed to beneficially own the securities owned directly by Sponsor. As the sole general partner of AVF, AVP LP may be deemed to beneficially own the securities owned directly by Sponsor. As the sole general partner of AVP LP, AVP LLC may be deemed to beneficially own securities owned directly by Sponsor. As the members of the investment committee, each of the AVP X Committee Members may be deemed to beneficially own securities owned directly by Sponsor. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.

F3 · kind: DA32 Sponsor LLC ("Sponsor") purchased 650,000 shares of Class A common stock directly from the Issuer in a private placement for $10.00 per share, concurrently with the Issuer's initial public offering.

F3 · shares: DA32 Sponsor LLC ("Sponsor") purchased 650,000 shares of Class A common stock directly from the Issuer in a private placement for $10.00 per share, concurrently with the Issuer's initial public offering.

F2 · ownership.nature: This Form 4 is filed jointly by ARCH Venture Fund XI, L.P. ("AVF"), ARCH Venture Partners XI, L.P. ("AVP LP"), ARCH Venture Partners XI, LLC ("AVP LLC"), Kristina Burow, Robert Nelsen and Steven Gillis (collectively, the "Reporting Persons"). Keith Crandell has direct ownership of the Issuer's Class B Common Stock, as well as indirect pecuniary ownership of the Issuer's Class A common stock and Class B Common Stock and is filing his own Form 4 separately. Burow, Crandell, Nelsen and Gillis comprise the investment committee of AVP LLC (the AVP X Committee Members). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.

F4 · ownership.nature: As a managing member of Sponsor, AVF may be deemed to beneficially own the securities owned directly by Sponsor. As the sole general partner of AVF, AVP LP may be deemed to beneficially own the securities owned directly by Sponsor. As the sole general partner of AVP LP, AVP LLC may be deemed to beneficially own securities owned directly by Sponsor. As the members of the investment committee, each of the AVP X Committee Members may be deemed to beneficially own securities owned directly by Sponsor. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.

SEC source: 0000899243-21-031417 · doc4.xml · nonDerivative · entry 1

ARCH Venture Fund XI, L.P. · CIK 0001831802 · 10% owner

ARCH Venture Partners XI, L.P. · CIK 0001847567 · 10% owner

ARCH Venture Partners XI, LLC · CIK 0001847601 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,600,000

F1 · kind: ARCH Venture Fund XI, L.P. purchased 1,600,000 shares of the Issuer's Class A common stock for $10.00 per share in the Issuer's initial public offering.

F2 · ownership.direct: This Form 4 is filed jointly by ARCH Venture Fund XI, L.P. ("AVF"), ARCH Venture Partners XI, L.P. ("AVP LP"), ARCH Venture Partners XI, LLC ("AVP LLC"), Kristina Burow, Robert Nelsen and Steven Gillis (collectively, the "Reporting Persons"). Keith Crandell has direct ownership of the Issuer's Class B Common Stock, as well as indirect pecuniary ownership of the Issuer's Class A common stock and Class B Common Stock and is filing his own Form 4 separately. Burow, Crandell, Nelsen and Gillis comprise the investment committee of AVP LLC (the AVP X Committee Members). Each of the Reporting Persons is a member of a Section 13(d) group. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of such Reporting Person's pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · derivative · entry 8

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X Overage, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 944,444 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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.expiration_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · derivative · entry 7

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X Overage, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 2,833,333 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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.expiration_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · derivative · entry 6

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 944,444 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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.expiration_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · derivative · entry 5

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 2,833,333 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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.expiration_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · derivative · entry 4

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X Overage, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 1,750,000 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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.expiration_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · derivative · entry 3

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X, L.P.

Disclosed balance after: 0

Underlying: Common Stock · 1,750,000 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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F1 · derivative.expiration_date: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · nonDerivative · entry 2

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X Overage, L.P.

Disclosed balance after: 5,527,777

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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-029077 · doc4.xml · nonDerivative · entry 1

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ARCH Venture Fund X, L.P.

Disclosed balance after: 5,527,777

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.

F1 · price: The shares of the Issuer's Series A and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 1.2-for-1 share, immediately prior to the consummation of the Issuer's initial public offering.

F2 · ownership.nature: ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow, Steven Gillis, and Robert Nelsen comprise the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage.

F3 · ownership.nature: (Continued from Footnote 2) AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to any pecuniary interest therein.

SEC source: 0000899243-21-025507 · doc4.xml · derivative · entry 6

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 486,867 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.

F4 · derivative.exercise_price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · kind: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · derivative.exercise_date: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F5 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: Represents shares held directly by ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH X Overage.

F3 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Robert Nelsen, Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-025507 · doc4.xml · derivative · entry 5

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 486,866 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.

F4 · derivative.exercise_price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · kind: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · derivative.exercise_date: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F5 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F1 · ownership.nature: Represents shares held directly by ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH X.

F3 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Robert Nelsen, Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-025507 · doc4.xml · derivative · entry 4

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 767,538 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.

F4 · derivative.exercise_price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · kind: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · derivative.exercise_date: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F5 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: Represents shares held directly by ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH X Overage.

F3 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Robert Nelsen, Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-025507 · doc4.xml · derivative · entry 3

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 767,538 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.

F4 · derivative.exercise_price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · kind: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F4 · derivative.exercise_date: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F5 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F1 · ownership.nature: Represents shares held directly by ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH X.

F3 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Robert Nelsen, Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-025507 · doc4.xml · nonDerivative · entry 2

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ARCH Venture Fund X Overage, L.P.

Disclosed balance after: 1,254,405

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.

F4 · price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F2 · ownership.direct: Represents shares held directly by ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH X Overage.

F3 · ownership.direct: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Robert Nelsen, Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-025507 · doc4.xml · nonDerivative · entry 1

ARCH Venture Partners X, LLC · CIK 0001769012 · 10% owner

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

ARCH Venture Fund X Overage, L.P. · CIK 0001757017 · 10% owner

ARCH Venture Partners X, L.P. · CIK 0001782583 · 10% owner

ARCH Venture Partners X Overage, L.P. · CIK 0001768905 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ARCH Venture Fund X, L.P.

Disclosed balance after: 1,254,404

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.

F4 · price: The shares of Issuer's Preferred Stock converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-9.2595 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · ownership.direct: Represents shares held directly by ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH X.

F3 · ownership.direct: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Robert Nelsen, Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-025391 · doc4.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2031-06-17

F1 · derivative.exercise_date: This option shall vest in full upon the earlier to occur of (i) June 18, 2022, or (ii) the next annual meeting of the Issuer's stockholders.

SEC source: 0000899243-21-025321 · doc4.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,000

Underlying: Common Stock · 18,000 shares

Expires 2031-06-17

F1 · derivative.exercise_date: This option shall vest and become exercisable on the earlier of June 17, 2022 or the day immediately prior to the date of the Issuer's next annual meeting of stockholders occurring after the date of grant, in either case subject to the Reporting Person continuing in service on the Board as a Non-Employee Director through such vesting date.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 14

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 2,343,750 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F6 · ownership.nature: Represents shares held directly by ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH X Overage.

F7 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 13

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 2,343,750 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F5 · ownership.nature: Represents shares held directly by ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH X.

F7 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 12

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 781,250 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F3 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage). ARCH Venture Partners IX Overage, L.P. (AVP IX Overage LP) is the sole general partner of ARCH IX Overage.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 11

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 781,250 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX, L.P. (ARCH IX). ARCH Venture Partners IX, L.P. (AVP IX LP) is the sole general partner of ARCH IX.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 10

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 5,687,500 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F3 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage). ARCH Venture Partners IX Overage, L.P. (AVP IX Overage LP) is the sole general partner of ARCH IX Overage.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 9

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 9,375,000 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F6 · ownership.nature: Represents shares held directly by ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH X Overage.

F7 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 8

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 9,375,000 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F5 · ownership.nature: Represents shares held directly by ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH X.

F7 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 7

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 5,687,500 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX, L.P. (ARCH IX). ARCH Venture Partners IX, L.P. (AVP IX LP) is the sole general partner of ARCH IX.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 6

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 3,687,500 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F3 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage). ARCH Venture Partners IX Overage, L.P. (AVP IX Overage LP) is the sole general partner of ARCH IX Overage.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · derivative · entry 5

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 3,687,500 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.

F1 · derivative.exercise_price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F1 · derivative.exercise_date: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F8 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX, L.P. (ARCH IX). ARCH Venture Partners IX, L.P. (AVP IX LP) is the sole general partner of ARCH IX.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · nonDerivative · entry 4

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 11,718,750

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.

F1 · price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F6 · ownership.nature: Represents shares held directly by ARCH Venture Fund X Overage, L.P. (ARCH X Overage). ARCH Venture Partners X Overage, L.P. (AVP X Overage LP) is the sole general partner of ARCH X Overage.

F7 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · nonDerivative · entry 3

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 11,718,750

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.

F1 · price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F5 · ownership.nature: Represents shares held directly by ARCH Venture Fund X, L.P. (ARCH X). ARCH Venture Partners X, L.P. (AVP X LP) is the sole general partner of ARCH X.

F7 · ownership.nature: ARCH Venture Partners X, LLC (AVP X LLC) is the sole general partner of each of AVP X LP and AVP X Overage LP. Keith Crandell, Kristina Burow and Steven Gillis are members of the investment committee of AVP X LLC (the AVP X Committee Members). AVP X LP and AVP X Overage LP may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, respectively, AVP X LLC may be deemed to beneficially own the shares held by ARCH X and ARCH X Overage, and each of the AVP X Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH X and ARCH X Overage. AVP X LP, AVP X Overage LP, AVP X LLC, and the AVP X Committee Members each disclaim beneficial ownership except to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · nonDerivative · entry 2

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 10,301,250

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.

F1 · price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F3 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX Overage, L.P. (ARCH IX Overage). ARCH Venture Partners IX Overage, L.P. (AVP IX Overage LP) is the sole general partner of ARCH IX Overage.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0000899243-21-005753 · doc4.xml · nonDerivative · entry 1

ARCH Venture Fund X, L.P. · CIK 0001757011 · 10% owner

CRANDELL KEITH · CIK 0001219039 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

Burow Kristina · CIK 0001569248 · 10% owner

GILLIS STEVEN · CIK 0001229592 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 10,303,750

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.

F1 · price: The shares of Issuer's Preferred Stock automatically converted into shares of Issuer's Common Stock, for no additional consideration, on a 1-for-1 basis immediately prior to the consummation of Issuer's initial public offering.

F2 · ownership.nature: Represents shares held directly by ARCH Venture Fund IX, L.P. (ARCH IX). ARCH Venture Partners IX, L.P. (AVP IX LP) is the sole general partner of ARCH IX.

F4 · ownership.nature: ARCH Venture Partners IX, LLC (AVP IX LLC) is the sole general partner of each of AVP IX LP and AVP IX Overage LP. Keith Crandell and Clinton Bybee are managing directors of AVP IX LLC (the AVP IX MDs). AVP IX LP and AVP IX Overage LP may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, respectively, AVP IX LLC may be deemed to beneficially own the shares held by ARCH IX and ARCH IX Overage, and each of the AVP IX MDs may be deemed to share the power to direct the disposition and vote of the shares held by ARCH IX and ARCH IX Overage. AVP IX LP, AVP IX Overage LP, AVP IX LLC, and the AVP IX MDs each disclaim beneficial ownership except to to the extent of any pecuniary interest therein.

SEC source: 0001493152-21-002140 · ownership.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Shares · 100,000 shares

Expires 2031-01-27

F1 · derivative.exercise_date: The reporting person is a participant in the Issuer's Incentive Plan (the "Plan"). The board of directors of the Issuer approved the option grant on January 27, 2021 (the "Grant Date"). The options were granted pursuant to that certain option agreement entered into by and between the Issuer and the reporting person, dated January 27, 2021 (the "Option Agreement"). The options vest and become exercisable in 12 equal monthly installments beginning on the first day of the month following the Grant Date, subject to the reporting person's employment on the relevant vesting date.

F2 · derivative.expiration_date: The options expire 10 years from the Grant Date unless terminated sooner in accordance with the Plan or the Option Agreement.

SEC source: 0000899243-20-028804 · doc4.xml · derivative · entry 5

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 420,368 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.

F4 · derivative.exercise_price: Each share of Series B Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.1366 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date. The reporting person previously reported shares of common stock into which the Series B Preferred Stock was convertible based on a 1-for-7.1295 conversion ratio estimated at pricing of the Issuer's initial public offering, which reflected a fixed conversion price plus an estimated adjustment based on the issuance of shares in the Issuer's initial public offering.

F4 · price: Each share of Series B Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.1366 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date. The reporting person previously reported shares of common stock into which the Series B Preferred Stock was convertible based on a 1-for-7.1295 conversion ratio estimated at pricing of the Issuer's initial public offering, which reflected a fixed conversion price plus an estimated adjustment based on the issuance of shares in the Issuer's initial public offering.

F4 · derivative.exercise_date: Each share of Series B Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.1366 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date. The reporting person previously reported shares of common stock into which the Series B Preferred Stock was convertible based on a 1-for-7.1295 conversion ratio estimated at pricing of the Issuer's initial public offering, which reflected a fixed conversion price plus an estimated adjustment based on the issuance of shares in the Issuer's initial public offering.

F4 · derivative.expiration_date: Each share of Series B Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.1366 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date. The reporting person previously reported shares of common stock into which the Series B Preferred Stock was convertible based on a 1-for-7.1295 conversion ratio estimated at pricing of the Issuer's initial public offering, which reflected a fixed conversion price plus an estimated adjustment based on the issuance of shares in the Issuer's initial public offering.

F2 · ownership.nature: Shares held by ARCH Venture Fund VIII, L.P. ("ARCH Fund VIII"). The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. ("ARCH Partners VIII"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. The sole general partner of ARCH Partners VIII is ARCH Venture Partners VIII, LLC ("ARCH VIII LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The Reporting Person is a managing director at ARCH Partners VIII and owns an interest in ARCH Partners VIII but does not have voting or investment control over the shares held by ARCH Fund VIII. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0000899243-20-028804 · doc4.xml · derivative · entry 4

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 0

Underlying: Common Stock · 1,784,572 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.

F1 · derivative.exercise_price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.8170 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date.

F1 · price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.8170 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date.

F1 · derivative.exercise_date: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.8170 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date.

F1 · derivative.expiration_date: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.8170 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date.

F2 · ownership.nature: Shares held by ARCH Venture Fund VIII, L.P. ("ARCH Fund VIII"). The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. ("ARCH Partners VIII"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. The sole general partner of ARCH Partners VIII is ARCH Venture Partners VIII, LLC ("ARCH VIII LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The Reporting Person is a managing director at ARCH Partners VIII and owns an interest in ARCH Partners VIII but does not have voting or investment control over the shares held by ARCH Fund VIII. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0000899243-20-028804 · doc4.xml · nonDerivative · entry 3

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 2,503,903

F2 · ownership.nature: Shares held by ARCH Venture Fund VIII, L.P. ("ARCH Fund VIII"). The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. ("ARCH Partners VIII"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. The sole general partner of ARCH Partners VIII is ARCH Venture Partners VIII, LLC ("ARCH VIII LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The Reporting Person is a managing director at ARCH Partners VIII and owns an interest in ARCH Partners VIII but does not have voting or investment control over the shares held by ARCH Fund VIII. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0000899243-20-028804 · doc4.xml · nonDerivative · entry 2

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 2,268,903

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.

F4 · price: Each share of Series B Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.1366 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date. The reporting person previously reported shares of common stock into which the Series B Preferred Stock was convertible based on a 1-for-7.1295 conversion ratio estimated at pricing of the Issuer's initial public offering, which reflected a fixed conversion price plus an estimated adjustment based on the issuance of shares in the Issuer's initial public offering.

F2 · ownership.nature: Shares held by ARCH Venture Fund VIII, L.P. ("ARCH Fund VIII"). The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. ("ARCH Partners VIII"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. The sole general partner of ARCH Partners VIII is ARCH Venture Partners VIII, LLC ("ARCH VIII LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The Reporting Person is a managing director at ARCH Partners VIII and owns an interest in ARCH Partners VIII but does not have voting or investment control over the shares held by ARCH Fund VIII. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0000899243-20-028804 · doc4.xml · nonDerivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,848,535

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.

F1 · price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 1-for-7.8170 basis upon the closing of the Issuer's initial public offering on October 16, 2020 and had no expiration date.

F2 · ownership.nature: Shares held by ARCH Venture Fund VIII, L.P. ("ARCH Fund VIII"). The sole general partner of ARCH Fund VIII is ARCH Venture Partners VIII, L.P. ("ARCH Partners VIII"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. The sole general partner of ARCH Partners VIII is ARCH Venture Partners VIII, LLC ("ARCH VIII LLC"), which may be deemed to beneficially own the shares held by ARCH Fund VIII. ARCH Partners VIII and ARCH VIII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The managing directors of ARCH VIII LLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH Fund VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The Reporting Person is a managing director at ARCH Partners VIII and owns an interest in ARCH Partners VIII but does not have voting or investment control over the shares held by ARCH Fund VIII. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0000899243-20-028423 · doc4.xml · derivative · entry 1

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2030-10-12

F1 · derivative.exercise_date: This option shall vest in full upon the earlier to occur of (i) October 13, 2021, and (ii) the next annual meeting of the Issuer's stockholders.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 16

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 10,000 shares

Expires 2021-09-01

F8 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on April 2, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 9,167 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F8 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on April 2, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 9,167 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F8 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on April 2, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 9,167 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 15

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,000 shares

Expires 2030-04-02

F8 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on April 2, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 9,167 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F8 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on April 2, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 9,167 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F8 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on April 2, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 9,167 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 14

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Common Stock · 15,000 shares

Expires 2021-09-01

F7 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on January 9, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 12,813 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F7 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on January 9, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 12,813 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F7 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on January 9, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 12,813 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 13

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,000 shares

Expires 2030-01-09

F7 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on January 9, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 12,813 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F7 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on January 9, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 12,813 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F7 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on January 9, 2020 and provided for vesting in forty-eight (48) equal monthly installments beginning on the first monthly anniversary of the date of grant. Vesting was accelerated for 12,813 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 12

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Common Stock · 15,000 shares

Expires 2021-09-01

F6 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on May 16, 2019 and provided for vesting in forty-eight (48) equal monthly installments on the 16th day of each month, with the first tranche vesting on June 16, 2019. Vesting was accelerated for 10,313 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F6 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on May 16, 2019 and provided for vesting in forty-eight (48) equal monthly installments on the 16th day of each month, with the first tranche vesting on June 16, 2019. Vesting was accelerated for 10,313 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F6 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on May 16, 2019 and provided for vesting in forty-eight (48) equal monthly installments on the 16th day of each month, with the first tranche vesting on June 16, 2019. Vesting was accelerated for 10,313 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 11

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,000 shares

Expires 2029-05-16

F6 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on May 16, 2019 and provided for vesting in forty-eight (48) equal monthly installments on the 16th day of each month, with the first tranche vesting on June 16, 2019. Vesting was accelerated for 10,313 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F6 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on May 16, 2019 and provided for vesting in forty-eight (48) equal monthly installments on the 16th day of each month, with the first tranche vesting on June 16, 2019. Vesting was accelerated for 10,313 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F6 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on May 16, 2019 and provided for vesting in forty-eight (48) equal monthly installments on the 16th day of each month, with the first tranche vesting on June 16, 2019. Vesting was accelerated for 10,313 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

SEC source: 0001493152-20-017108 · ownership.xml · derivative · entry 10

GILLIS STEVEN · CIK 0001229592 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,400

Underlying: Common Stock · 12,400 shares

Expires 2021-09-01

F5 · kind: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on June 5, 2018 and provided for 25% vesting on June 5, 2018 and the remaining 75% to vest in thirty-six (36) equal monthly installments with 2.083% for each of the next thirty-six (36) months that follow June 5, 2018. Vesting was accelerated for 2,581 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F5 · price: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on June 5, 2018 and provided for 25% vesting on June 5, 2018 and the remaining 75% to vest in thirty-six (36) equal monthly installments with 2.083% for each of the next thirty-six (36) months that follow June 5, 2018. Vesting was accelerated for 2,581 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.

F5 · derivative.exercise_date: The two reported transactions involved an amendment of an outstanding option, resulting in the deemed cancellation of the "old" option and the grant of a replacement option. The option was originally granted on June 5, 2018 and provided for 25% vesting on June 5, 2018 and the remaining 75% to vest in thirty-six (36) equal monthly installments with 2.083% for each of the next thirty-six (36) months that follow June 5, 2018. Vesting was accelerated for 2,581 options that otherwise would not have become vested due to the reporting person's resignation. The post-termination exercise period was extended to September 1, 2021.