X0508 4 2025-12-12 0001641281 Bolt Biotherapeutics, Inc. BOLT 0002023538 Nemec Sarah 900 CHESAPEAKE DRIVE REDWOOD CITY CA 94063 false true false false Senior VP, Finance and PAO false Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 1236 A 2030-09-02 Common Stock 1236 1236 D Employee Stock Option (Right to Buy) 86.80 2025-12-12 4 D false 1236 D 2030-09-02 Common Stock 1236 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 375 A 2031-02-03 Common Stock 375 375 D Employee Stock Option (Right to Buy) 400.00 2025-12-12 4 D false 375 D 2031-02-03 Common Stock 375 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 600 A 2031-12-21 Common Stock 600 600 D Employee Stock Option (Right to Buy) 90.20 2025-12-12 4 D false 600 D 2031-12-21 Common Stock 600 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 2199 A 2032-02-17 Common Stock 2199 2199 D Employee Stock Option (Right to Buy) 61.60 2025-12-12 4 D false 2199 D 2032-02-17 Common Stock 2199 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 6699 A 2033-01-18 Common Stock 6699 6699 D Employee Stock Option (Right to Buy) 27.80 2025-12-12 4 D false 6699 D 2033-01-18 Common Stock 6699 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 1589 A 2034-03-03 Common Stock 1589 1589 D Employee Stock Option (Right to Buy) 25.40 2025-12-12 4 D false 1589 D 2034-03-03 Common Stock 1589 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 2499 A 2034-07-22 Common Stock 2499 2499 D Employee Stock Option (Right to Buy) 14.602 2025-12-12 4 D false 2499 D 2034-07-22 Common Stock 2499 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 4499 A 2034-07-22 Common Stock 4499 4499 D Employee Stock Option (Right to Buy) 14.602 2025-12-12 4 D false 4499 D 2034-07-22 Common Stock 4499 0 D Employee Stock Option (Right to Buy) 5.44 2025-12-12 4 A false 11299 A 2035-04-30 Common Stock 11299 11299 D Employee Stock Option (Right to Buy) 7.02 2025-12-12 4 D false 11299 D 2035-04-30 Common Stock 11299 0 D The option is fully vested and exercisable. The reporting person agreed to cancellation of an option granted on September 3, 2020, in exchange for a new option having a lower exercise price. The reporting person agreed to cancellation of an option granted on February 4, 2021, in exchange for a new option having a lower exercise price. The reporting person agreed to cancellation of an option granted on December 22, 2021, in exchange for a new option having a lower exercise price. The reporting person agreed to cancellation of an option granted on February 18, 2022, in exchange for a new option having a lower exercise price. For so long as the Reporting Person continuously provides services to the Issuer this option will vest with respect to the shares as follows: 1/36th of the Shares will vest upon the Reporting Person completing each month of continuous service following January 1, 2023. The reporting person agreed to cancellation of an option granted on January 19, 2023, in exchange for a new option having a lower exercise price. For so long as the Reporting Person continuously provides services to the Issuer this option will vest with respect to the shares as follows: 1/36th of the Shares will vest upon the Reporting Person completing each month of continuous service following January 1, 2024. The reporting person agreed to cancellation of an option granted on March 4, 2024, in exchange for a new option having a lower exercise price. For so long as the Reporting Person continuously provides services to the Issuer this option will vest with respect to the shares as follows: 1/36th of the Shares will vest upon the Reporting Person completing each month of continuous service following July 15, 2024. The reporting person agreed to cancellation of an option granted on July 23, 2024, in exchange for a new option having a lower exercise price. For so long as the Reporting Person continuously provides services to the Issuer this option will vest with respect to the shares as follows: 1/36th of the Shares will vest upon the Reporting Person completing each month of continuous service following January 1, 2025. The reporting person agreed to cancellation of an option granted on May 1, 2025, in exchange for a new option having a lower exercise price. /s/ William P. Quinn, Attorney-in-Fact 2025-12-16