William P. Quinn - 28 Jan 2026 Form 4 Insider Report for Bolt Biotherapeutics, Inc. (BOLT)

Reporting relationship: President, CEO and CFO, Director
Issuer ticker: BOLT
Reported as of: 28 Jan 2026
Net transaction value: +$576
SEC form: 4
Accepted by SEC: 04 Feb 2026, 16:32:38 UTC
Prior SEC filing: 16 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ William P. Quinn

Key filing fact

William P. Quinn filed Form 4 for Bolt Biotherapeutics, Inc. (BOLT) on 04 Feb 2026.

Key facts

This page summarizes William P. Quinn's Form 4 filing for Bolt Biotherapeutics, Inc. (BOLT).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Feb 2026, 16:32.

Change

Previous filing in this sequence was filed on 16 Dec 2025.
Current net transaction value: +$576.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001724190 Primary reporting owner

Quinn William P.

Relationship: President, CEO and CFO, Director
Address: C/O BOLT BIOTHERAPEUTICS, INC., 900 CHESAPEAKE DRIVE, REDWOOD CITY
Signature: /s/ William P. Quinn
Signature date: 04 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BOLT transaction

Common Stock

Purchase

Transaction value: $576
Shares: +125
Change %: +5.7%
Price: $4.61
Shares after: 2,313
Date: 05 Dec 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

BOLT transaction Derivative

Employee Stock Option (Right to Buy)

Award

Transaction value: $0
Shares: +20,000
Change %
Price: $0.000000
Shares after: 20,000
Date: 28 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 20,000
Exercise price: $6.71
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

These shares were acquired under the Issuer's Employee Stock Purchase Plan in transactions that were exempt under Rule 16b-3(c).

Footnote F2

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, 2026.