Todd B. Hammer - 14 Aug 2026 Form 4 Insider Report for Guerrilla RF, Inc. (GUER)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: GUER
Reported as of: 14 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 18 Aug 2026, 10:33:43 UTC
Prior SEC filing: 23 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Charnice Suggs, Attorney-in-Fact

Key filing fact

Todd B. Hammer filed Form 4 for Guerrilla RF, Inc. (GUER) on 18 Aug 2026.

Key facts

This page summarizes Todd B. Hammer's Form 4 filing for Guerrilla RF, Inc. (GUER).
1 reported transaction and 3 derivative rows are listed below.
Accepted by SEC: 18 Aug 2026, 10:33.

Change

Previous filing in this sequence was filed on 23 Jun 2026.
Current net transaction value: $0.

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 0001283775 Primary reporting owner

HAMMER TODD B

Relationship: Director, 10%+ Owner
Address: 867 BOYLSTON STREET, 5TH FLOOR #1361, BOSTON
Signature: /s/ Charnice Suggs, Attorney-in-Fact
Signature date: 18 Aug 2026

Reported non-derivative transactions

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

GUER holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 32,292
Date: 14 Aug 2026
Ownership: Direct

Reported derivative securities

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

GUER transaction Derivative

Stock Option

Award

Transaction value
Shares: +14,164
Change %
Price: $0.000000^*
Shares after: 14,164
Date: 14 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 14,164
Exercise price: $6.00
Footnotes: F4

GUER holding Derivative

Series A Convertible Preferred Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 7,213,115
Date: 14 Aug 2026
Ownership: See Footnotes.
Underlying class: Common Stock
Underlying amount: 7,213,115
Exercise price: $327.87
Footnotes: F1, F2, F3

GUER holding Derivative

Common Stock Purchase Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,885,246
Date: 14 Aug 2026
Ownership: See Footnotes.
Underlying class: Common Stock
Underlying amount: 2,885,246
Exercise price: $3.05
Footnotes: F2, F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The securities do not have any expiration date.

Footnote F2

The reported securities are directly held by NR-PRL Partners, LP, and may be deemed to be indirectly beneficially owned by NR-PRL Partners GP, LLC as the general partner of NR-PRL Partners, LP. The securities may also be deemed to be indirectly beneficially owned by the Reporting Person as a member of NR-PRL Partners GP, LLC.

Footnote F3

The Reporting Person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission of beneficial ownership of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

Footnote F4

The option is immediately exercisable, subject to a right of repurchase in favor of the Issuer with respect to shares issued to the Reporting Person upon exercise of the option prior to vesting. The option vests on the earlier of (i) the first anniversary of the grant date and (ii) the date of the Issuer's next annual meeting of stockholders (currently expected to be June 9, 2027), subject to the Reporting Person's continued service through such vesting date.