SRZN

SEC source: 0001193125-26-016991 · ownership.xml · nonDerivative · entry 6

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 1,016,658

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016991 · ownership.xml · nonDerivative · entry 5

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 900,292

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016980 · ownership.xml · nonDerivative · entry 6

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 1,016,658

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016980 · ownership.xml · nonDerivative · entry 5

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 900,292

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and the Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016991 · ownership.xml · nonDerivative · entry 4

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 1,007,090

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016991 · ownership.xml · nonDerivative · entry 3

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 891,808

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016980 · ownership.xml · nonDerivative · entry 4

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 1,007,090

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016980 · ownership.xml · nonDerivative · entry 3

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 891,808

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and the Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016991 · ownership.xml · nonDerivative · entry 2

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 1,005,732

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016991 · ownership.xml · nonDerivative · entry 1

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 890,604

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016980 · ownership.xml · nonDerivative · entry 2

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 1,005,732

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-016980 · ownership.xml · nonDerivative · entry 1

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 890,604

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and the Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014100 · ownership.xml · nonDerivative · entry 4

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 999,429

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014100 · ownership.xml · nonDerivative · entry 3

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 885,014

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014101 · ownership.xml · nonDerivative · entry 4

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 999,429

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014101 · ownership.xml · nonDerivative · entry 3

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 885,014

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and the Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014100 · ownership.xml · nonDerivative · entry 2

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 996,502

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014100 · ownership.xml · nonDerivative · entry 1

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 882,418

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014101 · ownership.xml · nonDerivative · entry 2

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 996,502

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-014101 · ownership.xml · nonDerivative · entry 1

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 882,418

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and the Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-007857 · ownership.xml · nonDerivative · entry 2

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 989,893

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-007857 · ownership.xml · nonDerivative · entry 1

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

Svennilson Peter · CIK 0001606074 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 876,557

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-007847 · ownership.xml · nonDerivative · entry 2

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 989,893

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-007847 · ownership.xml · nonDerivative · entry 1

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 876,557

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are Peter Svennilson and the Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-26-005092 · ownership.xml · nonDerivative · entry 2

Williams Charles O · CIK 0001325818 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,982

F2 · price: The shares were sold to cover withholding taxes upon vesting of RSUs in transactions that were initiated by the Issuer on the reporting person's behalf. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.84 to $20.07, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001193125-26-005094 · ownership.xml · nonDerivative · entry 2

Li Yang · CIK 0001990537 · Exec. Vice President, Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,091

F2 · price: The shares were sold to cover withholding taxes upon vesting of RSUs in transactions that were initiated by the Issuer on the reporting person's behalf. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.84 to $20.07, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

SEC source: 0001193125-26-005092 · ownership.xml · derivative · entry 3

Williams Charles O · CIK 0001325818 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,500 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit, or RSU, represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: These RSUs vested in two equal installments on January 1, 2025 and January 1, 2026.

F3 · derivative.expiration_date: These RSUs vested in two equal installments on January 1, 2025 and January 1, 2026.

SEC source: 0001193125-26-005092 · ownership.xml · nonDerivative · entry 1

Williams Charles O · CIK 0001325818 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,548

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 restricted stock unit, or RSU, represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001193125-26-005094 · ownership.xml · derivative · entry 5

Li Yang · CIK 0001990537 · Exec. Vice President, Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,500 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit, or RSU, represents a contingent right to receive one share of the Issuer's common stock.

F3 · derivative.exercise_date: These RSUs vested in two equal installments on January 1, 2025 and January 1, 2026.

F3 · derivative.expiration_date: These RSUs vested in two equal installments on January 1, 2025 and January 1, 2026.

SEC source: 0001193125-26-005094 · ownership.xml · nonDerivative · entry 1

Li Yang · CIK 0001990537 · Exec. Vice President, Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,209

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 restricted stock unit, or RSU, represents a contingent right to receive one share of the Issuer's common stock.

SEC source: 0001193125-25-321306 · ownership.xml · nonDerivative · entry 1

Williams Charles O · CIK 0001325818 · Chief Operating Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,048

F1 · kind: This reporting person is voluntarily reporting these shares acquired under the Surrozen, Inc. 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

SEC source: 0001193125-25-321305 · ownership.xml · nonDerivative · entry 1

Parker Craig C · CIK 0001526064 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,577

F1 · kind: This reporting person is voluntarily reporting these shares acquired under the Surrozen, Inc. 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

SEC source: 0001193125-25-321315 · ownership.xml · nonDerivative · entry 1

Li Yang · CIK 0001990537 · Exec. Vice President, Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,709

F1 · kind: This reporting person is voluntarily reporting these shares acquired under the Surrozen, Inc. 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

SEC source: 0001193125-25-311384 · ownership.xml · nonDerivative · entry 4

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 981,890

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311384 · ownership.xml · nonDerivative · entry 2

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 869,460

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are David Goeddel, Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311404 · ownership.xml · nonDerivative · entry 4

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 981,890

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311404 · ownership.xml · nonDerivative · entry 2

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 869,460

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are David Goeddel, Peter Svennilson and The Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311384 · ownership.xml · nonDerivative · entry 3

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 965,509

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP"). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311384 · ownership.xml · nonDerivative · entry 1

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 854,957

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP"). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are David Goeddel, Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311404 · ownership.xml · nonDerivative · entry 3

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 965,509

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-311404 · ownership.xml · nonDerivative · entry 1

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 854,957

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are David Goeddel, Peter Svennilson and The Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-284943 · ownership.xml · nonDerivative · entry 2

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 962,718

F2 · ownership.nature: The securities are directly held by TCG III-A LP. TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-284943 · ownership.xml · nonDerivative · entry 1

COLUMN GROUP III GP, LP · CIK 0001790965 · 10% owner

COLUMN GROUP III-A, LP · CIK 0001668085 · 10% owner

COLUMN GROUP III, LP · CIK 0001668159 · 10% owner

Column Group Opportunity III, LP · CIK 0001931825 · 10% owner

Column Group Opportunity III GP, LP · CIK 0001932874 · 10% owner

TCG Opportunity III GP, LLC · CIK 0001932445 · 10% owner

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

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 852,482

F1 · ownership.nature: The securities are directly held by TCG III LP. The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are David Goeddel, Peter Svennilson and Tim Kutzkey, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-305738 · ownership.xml · nonDerivative · entry 2

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III-A, LP

Disclosed balance after: 962,718

F2 · ownership.nature: The securities are directly held by The Column Group III-A, LP ("TCG III-A LP). TCG III GP is the general partner of TCG III-A LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are the Managing Partners. The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-305738 · ownership.xml · nonDerivative · entry 1

Kutzkey Tim · CIK 0001614186 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Column Group III, LP

Disclosed balance after: 852,482

F1 · ownership.nature: The securities are directly held by The Column Group III, LP ("TCG III LP). The Column Group III GP, LP ("TCG III GP") is the general partner of TCG III LP and may be deemed to have voting, investment and dispositive power with respect to these securities. The managing partners of TCG III GP are David Goeddel, Peter Svennilson and The Reporting Person, a member of the Issuer's board of directors (collectively, the "Managing Partners"). The Managing Partners may be deemed to share voting and investment power with respect to such securities. TCG III GP and each of the Managing Partners disclaim beneficial ownership of these securities, except to the extent of their respective pecuniary interest in such securities.

SEC source: 0001193125-25-280240 · ownership.xml · derivative · entry 1

Maleki Andrew Pedrum · CIK 0002096218 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 50,000

Underlying: Common Stock · 50,000 shares

Expires 2035-11-11

F1 · derivative.exercise_date: Twenty-five percent of the shares subject to the Stock Option vests on the first anniversary of the vesting commencement date, and the remainder vests in 36 equal monthly installments thereafter for the following three years, subject to the reporting person's continuous service through the applicable vesting date.

SEC source: 0001593968-25-000786 · primary_01.xml · nonDerivative · entry 1

Williams Charles O · CIK 0001325818 · CFO and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,382

F1 · kind: This reporting person is voluntarily reporting these shares acquired under the Surrozen, Inc. 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

SEC source: 0001593968-25-000785 · primary_01.xml · nonDerivative · entry 1

Parker Craig C · CIK 0001526064 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,024

F1 · kind: This reporting person is voluntarily reporting these shares acquired under the Surrozen, Inc. 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

SEC source: 0001593968-25-000787 · primary_01.xml · nonDerivative · entry 1

Li Yang · CIK 0001990537 · Exec. Vice President, Research

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,043

F1 · kind: This reporting person is voluntarily reporting these shares acquired under the Surrozen, Inc. 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

SEC source: 0001593968-25-000607 · primary_01.xml · derivative · entry 1

Berkenblit Anna · CIK 0001691868 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,333

Underlying: Common Stock · 1,333 shares

Expires 2035-05-14

F1 · derivative.exercise_date: The options vest and become exercisable on the anniversary of the grant date, subject to continuous service as a director.