X0609 4 2026-09-16 0001641281 Bolt Biotherapeutics, Inc. BOLT 0001724190 Quinn William P. false C/O BOLT BIOTHERAPEUTICS, INC. 900 CHESAPEAKE DRIVE REDWOOD CITY CA 94063 true true false false President, CEO and CFO false Common Stock 2026-06-05 4 P false 637 3.876 A 2950 D Common Stock 2026-09-16 4 S false 1889 3.7740 D 41061 D Common Stock 2026-09-17 4 S false 6545 3.3183 D 34516 D Common Stock 2026-09-18 4 S false 9132 3.2364 D 25384 D These shares were acquired under the Issuer's Employee Stock Purchase Plan in transactions that were exempt under Rule 16b-3(c). 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 2026-09-21