X0306 4 2022-10-10 0001824893 Surrozen, Inc./DE SRZN 0001325818 Williams Charles O C/O SURROZEN, INC. 171 OYSTER POINT BLVD., SUITE 400 SOUTH SAN FRANCISCO CA 94080 false true false false Chief Financial Officer Option (right to buy) 5.13 2022-10-10 4 D false 77972 D 2021-11-30 2030-12-13 Common Stock 77972 0 D Option (right to buy) 10.25 2022-10-10 4 D false 2433 D 2022-08-12 2031-08-12 Common Stock 2433 0 D Option (right to buy) 10.25 2022-10-10 4 D false 12164 D 2022-08-12 2031-08-12 Common Stock 12164 0 D Option (right to buy) 5.13 2022-10-10 4 D false 97676 D 2021-11-30 2030-12-13 Common Stock 97676 0 D Option (right to buy) 2.16 2022-10-10 4 A false 12164 A 2022-08-12 2031-08-12 Common Stock 12164 12164 D Option (right to buy) 2.16 2022-10-10 4 A false 97676 A 2021-11-30 2030-12-13 Common Stock 97676 97676 D Option (right to buy) 2.16 2022-10-10 4 A false 2433 A 2022-08-12 2031-08-12 Common Stock 2433 2433 D Option (right to buy) 2.16 2022-10-10 4 A false 77972 A 2021-11-30 2030-12-13 Common Stock 77972 77972 D The reporting person agreed to cancellation of an option granted to him on 12/14/2020, in exchange for a new option having a lower exercise price. Twenty-five percent of the shares subject to the Stock Option vests on 11/30/2021, and the remainder vests in 36 equal monthly installments thereafter for the following three years. The reporting person agreed to cancellation of an option granted to him on 8/12/2021, in exchange for a new option having a lower exercise price. Twenty-five percent of the shares subject to the Stock Option vests on 8/12/2022, and the remainder vests in 36 equal monthly installments thereafter for the following three years. /s/Sheela Mohan-Peterson, Attorney-in-Fact for Charles O. Williams 2022-10-12