Sec Form 3 Filing - Quinn William P. @ Bolt Biotherapeutics, Inc. - 2021-02-04

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Quinn William P. 2. Issuer Name and Ticker or Trading Symbol Bolt Biotherapeutics, Inc. [ BOLT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O BOLT BIOTHERAPEUTICS, INC., 900 CHESAPEAKE DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 02/04/2021 (Street) REDWOOD CITY, CA94063 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12,698 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (Right to Buy) $ 2.8 ( 1 ) 07/28/2030 Common Stock 152,301 D Stock Option (Right to Buy) $ 4.34 ( 2 ) 09/02/2030 Common Stock 35,714 D Stock Option (Right to Buy) $ 4.34 ( 3 ) 09/02/2030 Common Stock 42,857 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Quinn William P. C/O BOLT BIOTHERAPEUTICS, INC. 900 CHESAPEAKE DRIVE REDWOOD CITY, CA94063 Chief Financial Officer Signatures /s/ Brian Woodard, Attorney-in-Fact 02/04/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )For so long as the Reporting Person continuously provides services to the Issuer, this option will vest with respect to the shares as follows: (a) 28,551 of the shares on the one (1) year anniversary of May 4, 2020 (the "Vesting Commencement Date"); and (b) thereafter, an additional 1/36th of the remaining shares will vest upon the Reporting Person completing each month of continuous service following the first one (1) year anniversary of the Vesting Commencement Date. ( 2 )This shares subject to this option vests over a four-year period with 6,696 shares vesting on June 3, 2021 and the remainder vesting monthly over 39 months from June 3, 2021, subject to the Reporting Person continuing to be a service provider to the Issuer through each such date. ( 3 )This shares subject to this option vests over a four-year period with 3,751 shares vesting on May 15, 2021 and the remainder vesting monthly over 44 months from May 15, 2021, subject to the Reporting Person continuing to be a service provider to the Issuer through each such date.

Remarks: Exhibit 24 - Power of Attorney

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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