Laura Berner - 12 Dec 2025 Form 4 Insider Report for Bolt Biotherapeutics, Inc. (BOLT)

Role
Director
Signature
/s/ William P. Quinn, Attorney-in-Fact
Issuer symbol
BOLT
Transactions as of
12 Dec 2025
Net transactions value
$0
Form type
4
Filing time
16 Dec 2025, 17:14:10 UTC
Previous filing
02 Jul 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Berner Laura Director C/O BOLT BIOTHERAPEUTICS, INC., 900 CHESAPEAKE DRIVE, REDWOOD CITY /s/ William P. Quinn, Attorney-in-Fact 16 Dec 2025 0001958382

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction BOLT Director Stock Option (Right to Buy) Award +2,500 2,500 12 Dec 2025 Common Stock 2,500 $5.44 Direct F1, F2
transaction BOLT Director Stock Option (Right to Buy) Disposed to Issuer -2,500 -100% 0 12 Dec 2025 Common Stock 2,500 $27.20 Direct F1, F2
transaction BOLT Director Stock Option (Right to Buy) Award +613 613 12 Dec 2025 Common Stock 613 $5.44 Direct F2, F3
transaction BOLT Director Stock Option (Right to Buy) Disposed to Issuer -613 -100% 0 12 Dec 2025 Common Stock 613 $27.20 Direct F2, F3
transaction BOLT Director Stock Option (Right to Buy) Award +1,250 1,250 12 Dec 2025 Common Stock 1,250 $5.44 Direct F3, F4
transaction BOLT Director Stock Option (Right to Buy) Disposed to Issuer -1,250 -100% 0 12 Dec 2025 Common Stock 1,250 $32.60 Direct F3, F4
transaction BOLT Director Stock Option (Right to Buy) Award +1,100 1,100 12 Dec 2025 Common Stock 1,100 $5.44 Direct F3, F5
transaction BOLT Director Stock Option (Right to Buy) Disposed to Issuer -1,100 -100% 0 12 Dec 2025 Common Stock 1,100 $15.36 Direct F3, F5
transaction BOLT Director Stock Option (Right to Buy) Award +1,100 1,100 12 Dec 2025 Common Stock 1,100 $5.44 Direct F6, F7
transaction BOLT Director Stock Option (Right to Buy) Disposed to Issuer -1,100 -100% 0 12 Dec 2025 Common Stock 1,100 $6.40 Direct F6, F7
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The shares subject to this option shall vest in equal monthly installments, at a rate of 1/36th of the total number of shares on each monthly anniversary of December 14, 2022 (the "Vesting Commencement Date") for so long as the Reporting Person provides continuous service to the Issuer, such that the total number of shares shall be fully vested on the three-year anniversary of the Vesting Commencement Date; provided, however that the option will vest in full upon a change in control of the Issuer.
F2 The reporting person agreed to cancellation of an option granted on December 14, 2022, in exchange for a new option having a lower exercise price.
F3 The option is fully vested and exercisable.
F4 The reporting person agreed to cancellation of an option granted on June 12, 2023, in exchange for a new option having a lower exercise price.
F5 The reporting person agreed to cancellation of an option granted on June 12, 2024, in exchange for a new option having a lower exercise price.
F6 The shares subject to the option will vest on the earlier of May 27, 2026 or the day immediately prior to the next annual meeting of stockholders, subject to the Reporting Person's continuous service through such date; provided, however that the option will vest in full upon a change in control of the Issuer.
F7 The reporting person agreed to cancellation of an option granted on May 27, 2025, in exchange for a new option having a lower exercise price.