Highland Capital Partners VII-C LP

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · derivative · entry 10

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 17,518 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.

F7 · derivative.exercise_price: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.exercise_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.expiration_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F4 · ownership.nature: These shares are held of record by Highland Capital Partners VII-B Limited Partnership ("Highland Capital VII-B"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Capital VII-B. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII-B and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII-B to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · derivative · entry 9

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 72,292 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.

F7 · derivative.exercise_price: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.exercise_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.expiration_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F3 · ownership.nature: These shares are held of record by Highland Capital Partners VII Limited Partnership ("Highland Capital VII"). Highland Management Partners VII, LLC ("HMP VII LLC") is the general partner of Highland Management Partners VII Limited Partnership ("HMP VII LP") which is the general partner of Highland Capital VII. Robert J. Davis, Paul A. Maeder, Corey M. Mulloy and Daniel J. Nova, a member of the Issuer's board of directors (collectively, the "Managing Members"), are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · derivative · entry 8

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,458 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.

F7 · derivative.exercise_price: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.exercise_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.expiration_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F6 · ownership.nature: These shares are held of record by Highland Entrepreneurs' Fund VII Limited Partnership ("Highland Entrepreneurs' Fund"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Entrepreneurs' Fund. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Entrepreneurs' Fund and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Entrepreneurs' Fund to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · derivative · entry 7

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 38,939 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.

F7 · derivative.exercise_price: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.exercise_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.expiration_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F5 · ownership.nature: These shares are held of record by Highland Capital Partners VII-C Limited Partnership ("Highland Capital VII-C"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Capital VII-C. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII-C and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII-C to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · derivative · entry 6

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 26,738 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.

F7 · derivative.exercise_price: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.exercise_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.expiration_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F4 · ownership.nature: These shares are held of record by Highland Capital Partners VII-B Limited Partnership ("Highland Capital VII-B"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Capital VII-B. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII-B and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII-B to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · derivative · entry 5

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 110,343 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.

F7 · derivative.exercise_price: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.exercise_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F7 · derivative.expiration_date: Immediately prior to the closing of the Issuer's initial public offering, each share of Series A Preferred Stock, Series A-1 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, Series E-1 Preferred Stock and Series F Preferred Stock (collectively, the "Preferred Stock") automatically converted into one share of the Issuer's Common Stock, par value $0.0001 per share, on a one-for-one basis. The Preferred Stock had no expiration date.

F3 · ownership.nature: These shares are held of record by Highland Capital Partners VII Limited Partnership ("Highland Capital VII"). Highland Management Partners VII, LLC ("HMP VII LLC") is the general partner of Highland Management Partners VII Limited Partnership ("HMP VII LP") which is the general partner of Highland Capital VII. Robert J. Davis, Paul A. Maeder, Corey M. Mulloy and Daniel J. Nova, a member of the Issuer's board of directors (collectively, the "Managing Members"), are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · nonDerivative · entry 4

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · kind: Immediately prior to the closing of the Issuer's initial public offering and following the conversion of each series of the Issuer's convertible preferred stock into Common Stock, each share of Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7.

F2 · price: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and upon the occurrence of other events set forth in the Issuer's Certificate of Incorporation.

F6 · ownership.nature: These shares are held of record by Highland Entrepreneurs' Fund VII Limited Partnership ("Highland Entrepreneurs' Fund"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Entrepreneurs' Fund. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Entrepreneurs' Fund and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Entrepreneurs' Fund to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · nonDerivative · entry 3

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · kind: Immediately prior to the closing of the Issuer's initial public offering and following the conversion of each series of the Issuer's convertible preferred stock into Common Stock, each share of Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7.

F2 · price: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and upon the occurrence of other events set forth in the Issuer's Certificate of Incorporation.

F5 · ownership.nature: These shares are held of record by Highland Capital Partners VII-C Limited Partnership ("Highland Capital VII-C"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Capital VII-C. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII-C and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII-C to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · nonDerivative · entry 2

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · kind: Immediately prior to the closing of the Issuer's initial public offering and following the conversion of each series of the Issuer's convertible preferred stock into Common Stock, each share of Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7.

F2 · price: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and upon the occurrence of other events set forth in the Issuer's Certificate of Incorporation.

F4 · ownership.nature: These shares are held of record by Highland Capital Partners VII-B Limited Partnership ("Highland Capital VII-B"). HMP VII LLC is the general partner of HMP VII LP which is the general partner of Highland Capital VII-B. The Managing Members are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII-B and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII-B to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001628280-21-006406 · wf-form4_161731467833867.xml · nonDerivative · entry 1

Highland Management Partners VIII Ltd · CIK 0001554033 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Entrepreneurs Fund VII Limited Partnership · CIK 0001357840 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 0

F1 · kind: Immediately prior to the closing of the Issuer's initial public offering and following the conversion of each series of the Issuer's convertible preferred stock into Common Stock, each share of Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7.

F2 · price: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and upon the occurrence of other events set forth in the Issuer's Certificate of Incorporation.

F3 · ownership.nature: These shares are held of record by Highland Capital Partners VII Limited Partnership ("Highland Capital VII"). Highland Management Partners VII, LLC ("HMP VII LLC") is the general partner of Highland Management Partners VII Limited Partnership ("HMP VII LP") which is the general partner of Highland Capital VII. Robert J. Davis, Paul A. Maeder, Corey M. Mulloy and Daniel J. Nova, a member of the Issuer's board of directors (collectively, the "Managing Members"), are the managing members of HMP VII LLC. Each of HMP VII LP, HMP VII LLC and the Managing Members may be deemed to share voting, investment and dispositive power over the shares held by Highland Capital VII and as a result may be deemed to have beneficial ownership over such shares. Each of HMP VII LLC, HMP VII LP and the Managing Members disclaims beneficial ownership over the shares held by Highland Capital VII to the extent of their respective pecuniary interests therein, if any.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 7

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VII Limited Partnership

Disclosed balance after: 16,331

F7 · kind: Effective December 12, 2018, Highland Entrepreneurs' Fund VII Limited Partnership ("HEF VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 9,362 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HEF VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F7 · ownership.nature: Effective December 12, 2018, Highland Entrepreneurs' Fund VII Limited Partnership ("HEF VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 9,362 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HEF VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 6

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-C Limited Partnership

Disclosed balance after: 183,940

F6 · kind: Effective December 12, 2018, Highland Capital Partners VII-C Limited Partnership ("HCP VII-C"), a venture capital partnership, distributed in-kind, without consideration, a total of 105,428 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-C, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F6 · ownership.nature: Effective December 12, 2018, Highland Capital Partners VII-C Limited Partnership ("HCP VII-C"), a venture capital partnership, distributed in-kind, without consideration, a total of 105,428 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-C, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 5

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-B Limited Partnership

Disclosed balance after: 126,304

F5 · kind: Effective December 12, 2018, Highland Capital Partners VII-B Limited Partnership ("HCP VII-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 72,394 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-B, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F5 · ownership.nature: Effective December 12, 2018, Highland Capital Partners VII-B Limited Partnership ("HCP VII-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 72,394 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-B, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 4

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII Limited Partnership

Disclosed balance after: 521,234

F4 · kind: Effective December 12, 2018, Highland Capital Partners VII Limited Partnership ("HCP VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 298,754 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VII Limited Partnership ("HMP VII LP"), the general partner of HCP VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F4 · ownership.nature: Effective December 12, 2018, Highland Capital Partners VII Limited Partnership ("HCP VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 298,754 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VII Limited Partnership ("HMP VII LP"), the general partner of HCP VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 3

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VI Limited Partnership

Disclosed balance after: 100,829

F3 · kind: Effective December 12, 2018, Highland Entrepreneurs' Fund VI Limited Partnership ("HEF VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 57,792 shares of Common Stock of the Issuer to its limited partners, including HEF VI Limited Partnership ("HEF"), the general partner of HEF VI, and to the limited partners of HEF. The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F3 · ownership.nature: Effective December 12, 2018, Highland Entrepreneurs' Fund VI Limited Partnership ("HEF VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 57,792 shares of Common Stock of the Issuer to its limited partners, including HEF VI Limited Partnership ("HEF"), the general partner of HEF VI, and to the limited partners of HEF. The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 2

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI-B Limited Partnership

Disclosed balance after: 1,116,002

F2 · kind: Effective December 12, 2018, Highland Capital Partners VI-B Limited Partnership ("HCP VI-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 639,653 shares of Common Stock of the Issuer to its limited partners, including HMP VI LP, the general partner of HCP VI-B, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F2 · ownership.nature: Effective December 12, 2018, Highland Capital Partners VI-B Limited Partnership ("HCP VI-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 639,653 shares of Common Stock of the Issuer to its limited partners, including HMP VI LP, the general partner of HCP VI-B, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-073134 · a4.xml · nonDerivative · entry 1

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI Limited Partnership

Disclosed balance after: 2,035,739

F1 · kind: Effective December 12, 2018, Highland Capital Partners VI Limited Partnership ("HCP VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 1,166,810 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VI Limited Partnership ("HMP VI LP"), the general partner of HCP VI, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F1 · ownership.nature: Effective December 12, 2018, Highland Capital Partners VI Limited Partnership ("HCP VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 1,166,810 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VI Limited Partnership ("HMP VI LP"), the general partner of HCP VI, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 7

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VII Limited Partnership

Disclosed balance after: 25,693

F7 · kind: Effective December 3, 2018, Highland Entrepreneurs' Fund VII Limited Partnership ("HEF VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 8,565 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HEF VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F7 · ownership.nature: Effective December 3, 2018, Highland Entrepreneurs' Fund VII Limited Partnership ("HEF VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 8,565 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HEF VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 6

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-C Limited Partnership

Disclosed balance after: 289,368

F6 · kind: Effective December 3, 2018, Highland Capital Partners VII-C Limited Partnership ("HCP VII-C"), a venture capital partnership, distributed in-kind, without consideration, a total of 96,456 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-C, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F6 · ownership.nature: Effective December 3, 2018, Highland Capital Partners VII-C Limited Partnership ("HCP VII-C"), a venture capital partnership, distributed in-kind, without consideration, a total of 96,456 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-C, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 5

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-B Limited Partnership

Disclosed balance after: 198,698

F5 · kind: Effective December 3, 2018, Highland Capital Partners VII-B Limited Partnership ("HCP VII-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 66,233 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-B, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F5 · ownership.nature: Effective December 3, 2018, Highland Capital Partners VII-B Limited Partnership ("HCP VII-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 66,233 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-B, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 4

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII Limited Partnership

Disclosed balance after: 819,988

F4 · kind: Effective December 3, 2018, Highland Capital Partners VII Limited Partnership ("HCP VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 273,330 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VII Limited Partnership ("HMP VII LP"), the general partner of HCP VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F4 · ownership.nature: Effective December 3, 2018, Highland Capital Partners VII Limited Partnership ("HCP VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 273,330 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VII Limited Partnership ("HMP VII LP"), the general partner of HCP VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 3

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VI Limited Partnership

Disclosed balance after: 158,621

F3 · kind: Effective December 3, 2018, Highland Entrepreneurs' Fund VI Limited Partnership ("HEF VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 52,874 shares of Common Stock of the Issuer to its limited partners, including HEF VI Limited Partnership ("HEF"), the general partner of HEF VI, and to the limited partners of HEF. The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F3 · ownership.nature: Effective December 3, 2018, Highland Entrepreneurs' Fund VI Limited Partnership ("HEF VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 52,874 shares of Common Stock of the Issuer to its limited partners, including HEF VI Limited Partnership ("HEF"), the general partner of HEF VI, and to the limited partners of HEF. The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 2

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI-B Limited Partnership

Disclosed balance after: 1,755,655

F2 · kind: Effective December 3, 2018, Highland Capital Partners VI-B Limited Partnership ("HCP VI-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 585,219 shares of Common Stock of the Issuer to its limited partners, including HMP VI LP, the general partner of HCP VI-B, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F2 · ownership.nature: Effective December 3, 2018, Highland Capital Partners VI-B Limited Partnership ("HCP VI-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 585,219 shares of Common Stock of the Issuer to its limited partners, including HMP VI LP, the general partner of HCP VI-B, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-071703 · a4.xml · nonDerivative · entry 1

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI Limited Partnership

Disclosed balance after: 3,202,549

F1 · kind: Effective December 3, 2018, Highland Capital Partners VI Limited Partnership ("HCP VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 1,067,516 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VI Limited Partnership ("HMP VI LP"), the general partner of HCP VI, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

F1 · ownership.nature: Effective December 3, 2018, Highland Capital Partners VI Limited Partnership ("HCP VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 1,067,516 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VI Limited Partnership ("HMP VI LP"), the general partner of HCP VI, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 24

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VII Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 16,243 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F8 · ownership.nature: The shares are held directly by Highland Entrepreneurs' Fund VII Limited Partnership ("Highland VII Entrepreneurs' Fund"). The general partner of Highland VII Entrepreneurs' Fund is HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of his their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 23

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-C Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 182,933 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F7 · ownership.nature: The shares are held directly by Highland Capital Partners VII-C Limited Partnership ("Highland Capital VII-C"). The general partner of Highland Capital VII-C is HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 22

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-B Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 125,613 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F6 · ownership.nature: The shares are held directly by Highland Capital Partners VII-B Limited Partnership ("Highland Capital VII-B"). The general partner of Highland Capital VII-B is HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 21

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 518,381 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F5 · ownership.nature: The shares are held directly by Highland Capital Partners VII Limited Partnership ("Highland Capital VII"). The general partner of Highland Capital VII is Highland Management Partners VII Limited Partnership ("HMP VII LP"). The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 20

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VII Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 18,015 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F8 · ownership.nature: The shares are held directly by Highland Entrepreneurs' Fund VII Limited Partnership ("Highland VII Entrepreneurs' Fund"). The general partner of Highland VII Entrepreneurs' Fund is HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of his their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 19

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-C Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 202,891 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F7 · ownership.nature: The shares are held directly by Highland Capital Partners VII-C Limited Partnership ("Highland Capital VII-C"). The general partner of Highland Capital VII-C is HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 18

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-B Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 139,318 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F6 · ownership.nature: The shares are held directly by Highland Capital Partners VII-B Limited Partnership ("Highland Capital VII-B"). The general partner of Highland Capital VII-B is HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 17

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 574,937 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F5 · ownership.nature: The shares are held directly by Highland Capital Partners VII Limited Partnership ("Highland Capital VII"). The general partner of Highland Capital VII is Highland Management Partners VII Limited Partnership ("HMP VII LP"). The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 16

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VI Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 17,083 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F4 · ownership.nature: The shares are held directly by Highland Entrepreneurs' Fund VI Limited Partnership ("Highland VI Entrepreneurs' Fund"). The general partner of Highland VI Entrepreneurs' Fund is HEF VI Limited Partnership ("HEF"). The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 15

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI-B Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 189,085 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F3 · ownership.nature: The shares are held directly by Highland Capital Partners VI-B Limited Partnership ("Highland Capital VI-B"). The general partner of Highland Capital VI-B is HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 14

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 344,900 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F2 · ownership.nature: The shares are held directly by Highland Capital Partners VI Limited Partnership ("Highland Capital VI"). The general partner of Highland Capital VI is Highland Management Partners VI Limited Partnership ("HMP VI LP"). The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 13

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VI Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 38,240 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F4 · ownership.nature: The shares are held directly by Highland Entrepreneurs' Fund VI Limited Partnership ("Highland VI Entrepreneurs' Fund"). The general partner of Highland VI Entrepreneurs' Fund is HEF VI Limited Partnership ("HEF"). The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 12

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI-B Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 423,259 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F3 · ownership.nature: The shares are held directly by Highland Capital Partners VI-B Limited Partnership ("Highland Capital VI-B"). The general partner of Highland Capital VI-B is HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 11

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 772,043 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F2 · ownership.nature: The shares are held directly by Highland Capital Partners VI Limited Partnership ("Highland Capital VI"). The general partner of Highland Capital VI is Highland Management Partners VI Limited Partnership ("HMP VI LP"). The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 10

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VI Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 118,736 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F4 · ownership.nature: The shares are held directly by Highland Entrepreneurs' Fund VI Limited Partnership ("Highland VI Entrepreneurs' Fund"). The general partner of Highland VI Entrepreneurs' Fund is HEF VI Limited Partnership ("HEF"). The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 9

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI-B Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 1,314,233 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F3 · ownership.nature: The shares are held directly by Highland Capital Partners VI-B Limited Partnership ("Highland Capital VI-B"). The general partner of Highland Capital VI-B is HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · derivative · entry 8

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI Limited Partnership

Disclosed balance after: 0

Underlying: Common Stock · 2,397,218 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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · price: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F2 · ownership.nature: The shares are held directly by Highland Capital Partners VI Limited Partnership ("Highland Capital VI"). The general partner of Highland Capital VI is Highland Management Partners VI Limited Partnership ("HMP VI LP"). The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 7

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VII Limited Partnership

Disclosed balance after: 34,258

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 6

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-C Limited Partnership

Disclosed balance after: 385,824

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 5

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII-B Limited Partnership

Disclosed balance after: 264,931

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 4

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VII Limited Partnership

Disclosed balance after: 1,093,318

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 3

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Entrepreneurs' Fund VI Limited Partnership

Disclosed balance after: 211,495

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F4 · ownership.nature: The shares are held directly by Highland Entrepreneurs' Fund VI Limited Partnership ("Highland VI Entrepreneurs' Fund"). The general partner of Highland VI Entrepreneurs' Fund is HEF VI Limited Partnership ("HEF"). The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 2

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI-B Limited Partnership

Disclosed balance after: 2,340,874

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F3 · ownership.nature: The shares are held directly by Highland Capital Partners VI-B Limited Partnership ("Highland Capital VI-B"). The general partner of Highland Capital VI-B is HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

SEC source: 0001104659-18-032301 · a4.xml · nonDerivative · entry 1

Highland Management Partners VI, Inc. · CIK 0001456415 · 10% owner

HIGHLAND MANAGEMENT PARTNERS VI L P · CIK 0001253995 · 10% owner

HIGHLAND CAPITAL PARTNERS VI-B LP · CIK 0001135507 · 10% owner

HIGHLAND CAPITAL PARTNERS VI LP · CIK 0001135500 · 10% owner

HIGHLAND ENTREPRENEURS FUND VI LP · CIK 0001156158 · 10% owner

Highland Management Partners VII Limited Partnership · CIK 0001554027 · 10% owner

Highland Capital Partners VII LP · CIK 0001343678 · 10% owner

HIGHLAND CAPITAL PARTNERS VII-B L P · CIK 0001343244 · 10% owner

Highland Capital Partners VII-C LP · CIK 0001343673 · 10% owner

Highland Management Partners VII, LLC · CIK 0001554026 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · By Highland Capital Partners VI Limited Partnership

Disclosed balance after: 4,270,065

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 preferred stock automatically converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer's initial public offering. The shares have no expiration date.

F2 · ownership.nature: The shares are held directly by Highland Capital Partners VI Limited Partnership ("Highland Capital VI"). The general partner of Highland Capital VI is Highland Management Partners VI Limited Partnership ("HMP VI LP"). The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.