SRZN

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).

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).

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).

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).

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

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

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

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

The options vest and become exercisable on the anniversary of the grant date, subject to Reporting Person's continuous service as a member of the Board of Directors of the Issuer.

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

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

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 $33.04 to $33.63, 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.

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 $33.04 to $33.63, 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.

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 $33.04 to $33.63, 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.

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

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

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

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

These RSUs vest in two equal installments on May 1, 2026 and May 1, 2027.

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

These RSUs vest in two equal installments on May 1, 2026 and May 1, 2027.

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

These RSUs vest in two equal installments on May 1, 2026 and May 1, 2027.

Represents a charitable donation by the Reporting Person.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

The shares subject to the option award vest over a four-year period in 48 equal monthly installments measured from February 1, 2026, subject to the reporting person's continued service through the applicable vesting date.

The shares subject to the option award vest over a four-year period in 48 equal monthly installments measured from February 1, 2026, subject to the reporting person's continued service through the applicable vesting date.

The shares subject to the option award vest over a four-year period in 48 equal monthly installments measured from February 1, 2026, subject to the reporting person's continued service through the applicable vesting date.

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

The shares subject to the RSUs vest in four equal annual installments starting on February 1, 2026, subject to the reporting person's continued service through the applicable vesting date.

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

The shares subject to the RSUs vest in four equal annual installments starting on February 1, 2026, subject to the reporting person's continued service through the applicable vesting date.

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

The shares subject to the RSUs vest in four equal annual installments starting on February 1, 2026, subject to the reporting person's continued service through the applicable vesting date.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund II, L.P. (TCG Crossover II). TCG Crossover GP II, LLC (TCG Crossover GP II) is the general partner of TCG Crossover II and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP II and may be deemed to share voting, investment and dispositive power with respect to these securities.

These securities are held of record by TCG Crossover Fund III, L.P. (TCG Crossover III). TCG Crossover GP III, LLC (TCG Crossover GP III) is the general partner of TCG Crossover III and may be deemed to have voting, investment, and dispositive power with respect to these securities. Chen Yu is the sole managing member of TCG Crossover GP III and may be deemed to share voting, investment and dispositive power with respect to these securities.

The shares subject to the option award vest over a four-year period in 48 equal monthly installments measured from grant date, subject to the reporting person's continued service through the applicable vesting date.

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.

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.