Michael John-Williams - 15 May 2026 Form 4 Insider Report for Guerrilla RF, Inc. (GUER)

Reporting relationship: Chief Financial Officer
Issuer ticker: GUER
Reported as of: 15 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 10:29:39 UTC
Prior SEC filing: 15 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Mike John-Williams

Key filing fact

Michael John-Williams filed Form 4 for Guerrilla RF, Inc. (GUER) on 19 May 2026.

Key facts

This page summarizes Michael John-Williams's Form 4 filing for Guerrilla RF, Inc. (GUER).
2 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 10:29.

Change

Previous filing in this sequence was filed on 15 May 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 0002052135 Primary reporting owner

John-Williams Michael

Relationship: Chief Financial Officer
Address: 2000 PISGAH CHURCH RD, GREENSBORO
Signature: /s/ Mike John-Williams
Signature date: 19 May 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: 9,870
Date: 15 May 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: +46,534
Change %
Price: $0.000000^*
Shares after: 46,534
Date: 17 Nov 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 46,534
Exercise price: $3.05
Footnotes: F4

GUER transaction Derivative

Stock Option

Award

Transaction value
Shares: +32,500
Change %
Price: $0.000000^*
Shares after: 32,500
Date: 15 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 32,500
Exercise price: $6.00
Footnotes: F5

GUER holding Derivative

Restricted Stock Unit

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 16,395
Date: 15 May 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 16,395
Exercise price
Footnotes: F1, 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 5 footnotes

Footnote F1

Each restricted stock unit represents a contingent right to receive one share of common stock upon vesting of the unit.

Footnote F2

The restricted stock units vest as follows:(i) 512 units on 6/8/2026, and monthly thereafter through 12/8/2028; and (ii) 523 units on 1/8/2029, in each case subject to the Reporting Person's continued service through the applicable vesting date.

Footnote F3

No expiration date.

Footnote F4

15,509 of the shares subject to the option have vested, and the remaining shares vest as follows:(i) 969 options on 6/8/2026, and monthly thereafter through 12/8/2028; and (ii) 986 options on 1/8/2029, in each case subject to the Reporting Person's continued service through the applicable vesting date.

Footnote F5

The options vest as follows: (i) 8,125 options on 5/15/2027; (ii) 2,031 options on 8/15/2027, and quarterly thereafter through 2/15/2030; and (iii) 2,034 options on5/15/2030, in each case subject to the Reporting Person's continued service through the applicable vesting date.