X0609 4 2026-09-16 0001641281 Bolt Biotherapeutics, Inc. BOLT 0001428666 Yonehiro Grant false C/O BOLT BIOTHERAPEUTICS, INC. 900 CHESAPEAKE DRIVE REDWOOD CITY CA 94063 false true false false Chief Operating Officer false Common Stock 2026-09-16 4 S false 1417 3.7740 D 29028 D Common Stock 2026-09-17 4 S false 4909 3.3183 D 24119 D Common Stock 2026-09-18 4 S false 6850 3.2364 D 17269 D Represents weighted average sales price. These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the restricted stock units granted on October 22, 2025. The shares were sold at prices ranging from $3.60 to $4.14. The Reporting Person will provide upon request, to the Securities and Exchange Commission (the "SEC"), the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Represents weighted average sales price. These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the restricted stock units granted on October 22, 2025. The shares were sold at prices ranging from $3.22 to $3.67. The Reporting Person will provide upon request, to the Securities and Exchange Commission (the "SEC"), the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Represents weighted average sales price. These shares were sold by the reporting person to cover tax withholding obligations in connection with the vesting of the restricted stock units granted on October 22, 2025. The shares were sold at prices ranging from $3.15 to $3.41. The Reporting Person will provide upon request, to the Securities and Exchange Commission (the "SEC"), the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. /s/ William P. Quinn, Attorney-in-Fact 2026-09-21