Every Form 4 that Guerrilla RF Inc (GUER) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow GUER and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full GUER filings page.
Guerrilla RF, Inc. (GUER) reported that director and ten percent owner Todd B. Hammer exercised stock options for 14,164 shares of common stock at an exercise price of $6.00 per share on August 28, 2026. The corresponding option for 14,164 shares was fully exercised and disposed, leaving 46,456 common shares held directly. Hammer is also reported as having indirect interests in Series A Convertible Preferred Stock and common stock purchase warrants representing 7,213,115 and 2,885,246 underlying common shares, respectively, through NR-PRL Partners, LP and related entities, with beneficial ownership disclaimed except for his pecuniary interest.
Guerrilla RF, Inc. (GUER) director and ten percent owner Thomas B. Ellis reported an option exercise and updated holdings. On 2026-08-28, he exercised 14,164 stock options at an exercise price of $6.00 per share, acquiring the same number of GUER common shares and increasing his directly held common stock to 46,456 shares. The exercised option grant now shows 0 options remaining. The option was immediately exercisable but is subject to a right of repurchase by Guerrilla RF for shares issued before vesting, with vesting scheduled on the earlier of the first anniversary of grant or the next annual meeting, currently expected to be June 9, 2027. Ellis is also reported as having indirect economic interests in 7,213,115 underlying common shares via Series A Convertible Preferred Stock and 2,885,246 underlying common shares via common stock purchase warrants held by NR-PRL Partners, LP, though he disclaims beneficial ownership beyond his pecuniary interest.
Guerrilla RF, Inc. (GUER) CEO Ryan Michael Pratt reported a cashless-style option exercise on 2026-08-26 involving 1,477 stock options held indirectly through his spouse, exercised at $1.42 per share into 1,477 shares of common stock, leaving 5,113 indirectly held common shares by spouse. He also reports direct holdings of 1,017,741 common shares, 11,793 restricted stock units that vest on 1/1/2027, and derivative positions including a warrant for 33,822 shares at $2.50 and multiple option grants covering more than 97,000 underlying shares with exercise prices between $1.93 and $6.00.
Guerrilla RF, Inc. (GUER) reported that director Virginia R. Summerell received a stock option grant for 14,164 shares of common stock at an exercise price of $6.00 per share, expiring August 14, 2036. The option is immediately exercisable but is subject to a right of repurchase by the company for shares issued upon exercise before vesting. It vests on the earlier of the first anniversary of the grant date or the company’s next annual meeting of stockholders, currently expected to be June 9, 2027, contingent on continued service. Summerell also holds options covering 15,625 shares at an exercise price of $3.05 and directly holds 26,811 shares of common stock following the reported transactions.
Guerrilla RF, Inc. (GUER) director David B. Bell received a stock option grant for 14,164 shares of common stock on August 14, 2026 at an exercise price of $6.00 per share, expiring August 14, 2036. The option is immediately exercisable but subject to a right of repurchase on shares issued before vesting, and vests on the earlier of the first anniversary of the grant date or the next annual meeting of stockholders, subject to continued service. Bell also holds previously reported options over 3,696 shares at $3.19 (expiring December 3, 2030) and 15,625 shares at $3.05 (expiring May 15, 2036), and 32,662 shares of common stock held directly.
Guerrilla RF, Inc. (GUER) director James E. Dunn, Jr. received a stock option grant for 14,164 shares of common stock on 2026-08-14 at an exercise price of $6.00 per share. The option is immediately exercisable but subject to a right of repurchase by Guerrilla RF for shares issued on early exercise before vesting, and it vests on the earlier of the first anniversary of the grant date or the next annual stockholders’ meeting, subject to continued service. Dunn also reports existing derivative positions including options over 2,464 shares at $3.19 (fully vested) and 15,625 shares at $3.05, plus indirect warrants and common stock held through a trust.
Guerrilla RF, Inc. (GUER) director Gary L. Smith received a stock option grant on August 14, 2026 for 14,164 shares of common stock at an exercise price of $6.00 per share. The option is immediately exercisable but subject to a company right of repurchase on unvested shares and vests on the earlier of the first anniversary of the grant or Guerrilla RF’s next annual stockholders’ meeting, currently expected June 9, 2027, contingent on continued service. Smith also holds previously granted options over 3,696 shares at $3.19 expiring August 27, 2030 and 15,625 shares at $3.05 expiring May 15, 2036, and directly owns 32,662 common shares.
Guerrilla RF, Inc. (GUER) director and 10% owner Thomas B. Ellis reported an award of 14,164 stock options with a $6.00 exercise price, expiring August 14, 2036. The option is immediately exercisable but subject to the issuer’s repurchase right until it vests on the earlier of the first anniversary of grant or the next annual stockholders’ meeting, currently expected June 9, 2027. Ellis also reports indirect interests in Series A Convertible Preferred Stock convertible into 7,213,115 common shares and warrants for 2,885,246 common shares, held through NR-PRL entities, for which he disclaims beneficial ownership beyond his pecuniary interest, plus direct ownership of 32,292 common shares.
Guerrilla RF, Inc. (GUER) reported that director and 10% owner Todd B. Hammer received a grant of stock options for 14,164 shares of common stock at an exercise price of 6.0000 per share, expiring on 2036-08-14. The option is immediately exercisable but is subject to a right of repurchase by Guerrilla RF for shares issued upon early exercise before vesting, and it vests on the earlier of the first anniversary of the grant date or the company’s next annual stockholders’ meeting, currently expected to be June 9, 2027, contingent on continued service. Hammer now directly holds these 14,164 options and 32,292 shares of common stock, and is also reported as having indirect economic interests in 7,213,115 underlying common shares through Series A Convertible Preferred Stock and 2,885,246 underlying common shares through common stock purchase warrants held by NR-PRL Partners, LP, while disclaiming beneficial ownership beyond his pecuniary interest.
Guerrilla RF, Inc. director William J. Pratt received a stock option grant for 14,164 shares of Common Stock on 2026-08-14 with an exercise price of $6.00 per share and expiration on 2036-08-14. The option is immediately exercisable but subject to a right of repurchase by the company for shares issued before vesting; it vests on the earlier of the first anniversary of the grant date or the next annual stockholders’ meeting, subject to continued service. Pratt also reports existing directly held options and warrants on Guerrilla RF Common Stock and direct ownership of 151,789 shares plus 1,000 shares held indirectly by his spouse.
Guerrilla RF director and 10% owner Todd B. Hammer reported exercising stock options for 15,625 shares of common stock at an exercise price of $3.05 per share. Following this option exercise, he directly holds 32,292 common shares.
The filing also shows large indirect derivative positions in entities associated with him. NR-PRL Partners, LP holds common stock purchase warrants convertible into 2,885,246 common shares at $3.05 per share and Series A convertible preferred stock convertible into 7,213,115 common shares at a conversion price of $327.87. These securities are held by NR-PRL Partners, LP and its general partner NR-PRL Partners GP, LLC, and Hammer disclaims beneficial ownership except to the extent of his pecuniary interest.
Guerrilla RF director and 10% owner Thomas B. Ellis exercised stock options into additional common shares. He exercised options for 15,625 shares of common stock at an exercise price of $3.05 per share, bringing his directly held common stock to 32,292 shares.
Separately, an entity associated with Ellis, NR-PRL Partners, LP, indirectly holds common stock purchase warrants convertible into 2,885,246 shares of common stock at an exercise price of $3.05 per share, expiring on February 5, 2030. It also indirectly holds Series A Convertible Preferred Stock convertible into 7,213,115 shares of common stock, which has no expiration date.
Ellis disclaims beneficial ownership of the indirectly held securities except to the extent of his pecuniary interest, meaning those large positions are attributed primarily to NR-PRL Partners structures rather than to him personally.
Guerrilla RF director James E. Dunn, Jr. reported exercising stock options to acquire a total of 6,155 shares of Guerrilla RF common stock on June 11, 2026. The exercises converted options at strike prices of $2.20, $1.93, and $1.42 per share into common shares.
After these transactions, he directly owns 50,791 shares of common stock. He also has indirect holdings of 5,002 common shares and 834 warrants held by the James E. Dunn, Jr. Restated 1985 Revocable Trust for his benefit.
Following the exercises, Dunn still holds unexercised equity awards, including stock options over 15,625 shares at an exercise price of $3.05 and options over 2,464 shares at $3.19, as well as 834 warrant-underlying shares at an exercise price of $12.00.
Guerrilla RF, Inc. director David B. Bell reported a compensation-related grant of stock options. He received 15,625 stock options for common stock at an exercise price of $3.05 per share, expiring on May 15, 2036.
Bell is also shown as directly holding 32,662 shares of common stock and a fully vested option for 3,696 shares with a $3.19 exercise price expiring on December 3, 2030. The filing reflects holdings and an option grant, not any open‑market buying or selling.
Guerrilla RF director and 10% owner Todd B. Hammer reported a stock option grant for 15,625 shares of Common Stock at an exercise price of $3.05 per share. These options were awarded as compensation on May 15, 2026 and expire on May 15, 2036.
The filing also lists indirect positions held through NR-PRL Partners, LP and its general partner, including Common Stock purchase warrants and Series A Convertible Preferred Stock that are convertible into 2,885,246 and 7,213,115 shares of Common Stock, respectively. Hammer disclaims beneficial ownership of these indirect securities except to the extent of his pecuniary interest.
Guerrilla RF, Inc. director and ten percent owner Thomas B. Ellis reported a compensation-related grant of stock options for 15,625 shares of Common Stock. These options have an exercise price of $3.05 per share and expire on May 15, 2036.
After this filing, Ellis holds 16,667 shares of Common Stock directly. Entities associated with him, including NR-PRL Partners, LP and its general partner NR-PRL Partners GP, LLC, hold Common Stock purchase warrants and Series A Convertible Preferred Stock that are convertible into 2,885,246 and 7,213,115 shares of Common Stock, respectively. He disclaims beneficial ownership of these indirect holdings except to the extent of his pecuniary interest.
Guerrilla RF, Inc. director Susan Berish Barkal reported her current equity position and a new stock option grant. She received a stock option covering 15,625 shares of Common Stock at an exercise price of $3.05 per share, expiring on May 15, 2036.
After this grant, she directly holds 37,245 shares of Common Stock and a warrant linked to 3,334 underlying Common Stock shares with a $12.00 exercise price, expiring on August 28, 2028. The filing does not show any open‑market buys or sells, only holdings and this compensation-related option award.
Guerrilla RF director Virginia R. Summerell reported a new equity award and her current shareholdings. She received a grant of stock options for 15,625 shares of Guerrilla RF common stock at an exercise price of $3.05 per share, expiring on May 15, 2036. Following these transactions, she directly holds 26,811 shares of common stock, giving a clearer picture of her ongoing equity stake in the company.
Guerrilla RF, Inc. director Gary L. Smith reported an option grant and his current holdings. He received a grant of 15,625 stock options for Common Stock at an exercise price of $3.05 per share, expiring on May 15, 2036. Following this grant, he holds 32,662 shares of Common Stock directly and option positions including 3,696 fully vested options with a $3.19 exercise price expiring on August 27, 2030.
Guerrilla RF, Inc. director William J. Pratt reported a new compensation award and updated equity holdings. He received a grant of 15,625 stock options on May 15, 2026 with an exercise price of $3.05 per share, which are fully vested and exercisable and expire on May 15, 2036.
After this grant, Pratt holds 151,789 shares of common stock directly and 1,000 shares indirectly through his spouse. He also has existing derivatives, including a warrant for 21,139 shares at $2.50 per share and several smaller stock option positions with exercise prices between $1.42 and $3.19 per share.
Guerrilla RF, Inc. director James E. Dunn Jr. received a grant of 15,625 stock options for common stock at an exercise price of $3.05 per share, which are fully vested and exercisable and expire on May 15, 2036. A revocable trust for his benefit also bought 3,335 shares of common stock at $3.00 per share, increasing its indirect holdings to 5,002 shares. Separately, he holds 48,329 shares of common stock directly and several option and warrant positions on additional shares at exercise prices ranging from $1.42 to $12.00.
Guerrilla RF, Inc.'s Chief Executive Officer Ryan Michael Pratt reported his current equity position, including a new stock option award. On 2026-05-15, he received a grant of 45,000 stock options with an exercise price of $6.0000 per share, expiring on 2036-05-15.
Following this grant, the filing shows 1,017,741 shares of common stock held directly, additional shares held indirectly through trusts for his children and by his spouse, and various existing options, warrants, and restricted stock units. The trust-held shares are recorded for Section 16 purposes with beneficial ownership disclaimed except for any pecuniary interest. The report does not show any open-market buys or sells, focusing instead on holdings and compensation-related equity.
Guerrilla RF, Inc. Chief Business Officer Kellie Hyon-Ok Chong reported her equity holdings and a new option grant. She received 20,000 stock options for common stock at an exercise price of $6.00 per share, expiring on May 15, 2036, as a compensation award.
After this filing, she directly holds 24,292 shares of common stock and has an indirect interest in 4,804 shares held by Ninth Technology, LLC, where she is a member and manager. She also holds previously granted options on 25,000 shares at $3.05 and 21,667 shares at $12.00, plus 5,897 restricted stock units that convert into common stock upon vesting.
Guerrilla RF, Inc.'s Chief Operating Officer Mark Alan Mason reported his equity holdings and a new stock option award. He received a grant of 27,500 stock options for common stock at an exercise price of $6.0000 per share, expiring on May 15, 2036, as a compensation-related award.
Following this award, he holds 31,110 shares of common stock directly, along with multiple derivative positions. These include a warrant for 834 underlying common shares at $2.5000 per share expiring in 2028, several option grants over 1,774 to 25,000 underlying shares with exercise prices between $2.2000 and $3.1900 expiring between 2029 and 2035, and 5,897 restricted stock units, each representing one share.
Footnotes explain that the restricted stock units vest on January 1, 2027, and that related option grants vest in tranches between 2026 and 2030, in each case subject to Mason’s continued service with the company.
Guerrilla RF, Inc. Chief Financial Officer John-Williams Michael reported updated equity holdings, including compensation-related awards. He now directly holds 9,870 shares of common stock and 16,395 restricted stock units, each representing a right to receive one share of common stock upon vesting.
On May 15, 2026, he was granted stock options for 32,500 shares of common stock at an exercise price of $6.00 per share, and continues to hold a prior option grant for 46,534 shares at a $3.05 exercise price. Footnotes state that the RSUs and options vest in tranches through 2029 and 2030, conditioned on his continued service, and that certain portions of earlier awards have already vested.
Guerrilla RF, Inc.’s Chief Financial Officer Michael John-Williams reported buying 2,000 shares of common stock in an open-market purchase at $2.8200 per share, increasing his direct common stock holdings to 9,870 shares.
He also holds 16,395 restricted stock units, each representing a right to receive one share of common stock upon vesting on a specified schedule through 2029, and 46,534 stock options granted at a $3.0500 exercise price, which vest over time with 15,509 options already vested.
Guerrilla RF, Inc. (GUER) reported an insider equity update for its Chief Operating Officer on a Form 4. Following the reported transactions, the officer directly owns 19,380 shares of common stock. In derivative securities, the officer holds 25,000 stock options granted on 11/17/2025 at an exercise price of $3.05 per share, expiring on 11/17/2035. Each restricted stock unit (RSU) represents one share of common stock, including 4,167 RSUs that vest on 1/1/2026 and 11,793 RSUs that vest in two tranches on 1/1/2026 and 1/1/2027, all subject to continued service. The filing also notes fully vested stock options covering 24,590 and 1,774 underlying common shares with expirations in 2029 and 2030.
Guerrilla RF, Inc. (GUER) reported an insider equity award for its Chief Financial Officer on 11/17/2025. The CFO received 24,590 restricted stock units (RSUs), each representing a right to one share of common stock upon vesting, and 46,534 stock options with an exercise price of $3.05 per share.
The RSUs vest in stages from 1/8/2026 through 1/8/2029, and the options vest on a similar schedule over the same period, in each case conditioned on the executive’s continued service. The options expire on 11/17/2035, while the RSUs have no stated expiration date.
Guerrilla RF, Inc. reported an equity award for its Chief Business Officer on a Form 4. On 11/17/2025, the officer received a stock option for 25,000 shares of common stock with an exercise price of $3.05 per share, expiring on 11/17/2035. Following the reported transactions, the officer beneficially owns 14,229 shares of common stock directly and has an indirect interest in 4,804 shares held by Ninth Technology, LLC. The officer also holds several equity-based awards, including restricted stock units covering 4,167 and 11,793 shares of common stock that vest on specified future dates, and other previously granted stock options, some of which have already vested and others that vest over time, all subject to continued service.
Guerrilla RF, Inc. (GUER) reported an insider equity award for its Chief Executive Officer, who is also a director. On 11/17/2025, the reporting person received stock options to purchase 50,000 shares of common stock directly and options on 330 shares held indirectly by a spouse, all with an exercise price of $3.05 per share and an expiration date of 11/17/2035. These options vest over several years beginning in 2026, with portions vesting on 5/21/2026 and then monthly through 4/21/2029, and a final tranche on 5/21/2029, subject to continued service. The filing also shows existing holdings of common stock, restricted stock units, options, and warrants held directly, by a spouse, and by several trusts for the benefit of the reporting person’s children.