Mason Mark Alan 4

4 · Guerrilla RF, Inc. · Filed May 19, 2026

AI-generated summary of this filing

Updated May 19, 2026

Guerrilla RF (GUER) COO Mark Mason Receives RSU Award

What Happened

Mark Alan Mason, Chief Operating Officer of Guerrilla RF (GUER), was granted 27,500 restricted stock units (RSUs) on May 15, 2026. The RSUs are recorded as a derivative award at $0.00 (no cash purchase). Each RSU represents the right to receive one share upon vesting, and these units vest on January 1, 2027, subject to Mason’s continued service.

Key Details

Transaction date: 2026-05-15; reported (filed) with SEC on 2026-05-19 (filing appears timely).
Award: 27,500 RSUs, acquisition price $0.00 (derivative grant).
Vesting: RSUs vest on 01/01/2027, contingent on continued service (see footnotes F1 and F4).
Shares owned after transaction: not specified in the Form 4 summary provided — see the full filing for total beneficial ownership.
Other notes in the filing (footnotes F2–F6) describe outstanding stock options and various vesting schedules; consult the filing for those specifics.

Context

RSUs are a compensation award that convert to actual shares only if vesting conditions are met; they do not involve an immediate cash outlay or an open-market purchase. Such grants are common as part of executive compensation and do not by themselves indicate buying or selling sentiment. For a complete picture of Mason’s holdings and any vested/exercisable options, review the full Form 4.

Form 4

Period: 2026-05-15

Chief Operating Officer

Transactions

Award
Stock Option
[F6]
2026-05-15+27,500→ 27,500 total
Exercise: $6.00Exp: 2036-05-15→ Common Stock (27,500 underlying)

Holdings

Common Stock
31,110
Stock Option
[F2]
Exercise: $2.20Exp: 2029-09-11→ Common Stock (24,590 underlying)
24,590
Stock Option
[F2]
Exercise: $3.19Exp: 2030-10-30→ Common Stock (1,774 underlying)
1,774
Restricted Stock Unit
[F1][F4][F3]
→ Common Stock (5,897 underlying)
5,897
Stock Option
[F5]
Exercise: $3.05Exp: 2035-11-17→ Common Stock (25,000 underlying)
25,000
Warrant
Exercise: $2.50From: 2023-08-28Exp: 2028-08-28→ Common Stock (834 underlying)
834

Footnotes (6)

[F1]Each restricted stock unit represents the contingent right to receive one share of common stock upon vesting of the unit.
[F2]The shares subject to the option are fully vested and exercisable.
[F3]No expiration date.
[F4]The restricted stock units vest on 1/1/2027, subject to the Reporting Person's continued service through the applicable vesting date
[F5]The options vest as follows: (i) 6,250 options on 5/21/2026; (ii) 520 options on 6/21/26, and monthly thereafter through 4/21/29; and (iii) 550 options on 5/21/2029, in each case subject to the Reporting Person's continued service through the applicable vesting date.
[F6]The options vest as follows: (i) 6,875 options on 5/15/2027; (ii) 1,718 options on 8/15/2027, and quarterly thereafter through 2/15/2030; and (iii) 1,727 options on 5/15/2030, in each case subject to the Reporting Person's continued service through the applicable vesting date.

Signature

/s/ Iain MacSween, Attorney-in-Fact|2026-05-19

1 file