Grant Yonehiro - 16 Sep 2026 Form 4 Insider Report for Bolt Biotherapeutics, Inc. (BOLT)

Reporting relationship: Chief Operating Officer
Issuer ticker: BOLT
Reported as of: 16 Sep 2026
Net transaction value: -$43,807
SEC form: 4
Accepted by SEC: 21 Sep 2026, 18:05:24 UTC
Prior SEC filing: 04 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ William P. Quinn, Attorney-in-Fact

Filing notes and source

Key filing fact

Grant Yonehiro filed Form 4 for Bolt Biotherapeutics, Inc. (BOLT) on 21 Sep 2026.

Key facts

This page summarizes Grant Yonehiro's Form 4 filing for Bolt Biotherapeutics, Inc. (BOLT).
3 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 21 Sep 2026, 18:05.

Change

Previous filing in this sequence was filed on 04 Feb 2026.
Current net transaction value: -$43,807.

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 0001428666 Primary reporting owner

Yonehiro Grant

Relationship: Chief Operating Officer
Address: C/O BOLT BIOTHERAPEUTICS, INC., 900 CHESAPEAKE DRIVE, REDWOOD CITY
Signature: /s/ William P. Quinn, Attorney-in-Fact
Signature date: 21 Sep 2026

Reported non-derivative transactions

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

BOLT transaction

Common Stock

Sale

Transaction value: $5,348
Shares: -1,417
Change %: -4.7%
Price: $3.77
Shares after: 29,028
Date: 16 Sep 2026
Ownership: Direct
Footnotes: F1

BOLT transaction

Common Stock

Sale

Transaction value: $16,290
Shares: -4,909
Change %: -17%
Price: $3.32
Shares after: 24,119
Date: 17 Sep 2026
Ownership: Direct
Footnotes: F2

BOLT transaction

Common Stock

Sale

Transaction value: $22,169
Shares: -6,850
Change %: -28%
Price: $3.24
Shares after: 17,269
Date: 18 Sep 2026
Ownership: Direct
Footnotes: F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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.

Footnote F2

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.

Footnote F3

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.