STOCK TITAN

Guerrilla RF (GUER) insider Ellis exercises options, linked to large indirect holdings

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

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.

Positive

  • None.

Negative

  • None.
Insider ELLIS THOMAS B
Role null
Type Security Shares Price Value
Exercise Stock Option 15,625 $0.00 --
Exercise Common Stock 15,625 $3.05 $48K
holding Series A Convertible Preferred Stock -- -- --
holding Common Stock Purchase Warrants -- -- --
Holdings After Transaction: Stock Option — 0 shares (Direct, null); Common Stock — 32,292 shares (Direct, null); Series A Convertible Preferred Stock — 7,213,115 shares (Indirect, See Footnotes.); Common Stock Purchase Warrants — 2,885,246 shares (Indirect, See Footnotes.)
Footnotes (1)
  1. The securities do not have any expiration date. 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. 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. Pursuant to the exercise of stock options.
Options exercised 15,625 shares Common stock acquired via option exercise at $3.05/share
Option exercise price $3.05/share Stock option and warrant exercise price for common stock
Direct common shares after exercise 32,292 shares Ellis’s direct Guerrilla RF common stock holdings post-transaction
Indirect warrant underlying shares 2,885,246 shares Common Stock Purchase Warrants held via NR-PRL Partners, LP
Indirect Series A underlying shares 7,213,115 shares Common shares underlying Series A Convertible Preferred Stock
Common Stock Purchase Warrants financial
"Common Stock Purchase Warrants convertible into 2,885,246 shares of common stock"
Common stock purchase warrants are tradable instruments that give the holder the right to buy a company’s common shares at a set price before a specified date, like a coupon that lets you purchase stock later at a fixed rate. They matter to investors because they offer a way to gain future upside if the stock rises, but when exercised they increase the number of shares outstanding and can reduce existing shareholders’ ownership and earnings per share.
Series A Convertible Preferred Stock financial
"Series A Convertible Preferred Stock convertible into 7,213,115 shares of common stock"
Series A convertible preferred stock is a class of shares sold in an early funding round that gives investors a mix of protection and upside: it pays a priority claim over common shares if the company is sold or closes, but can be converted into ordinary shares to share in future growth. Think of it like a hybrid between a safer stake and a ticket to ownership; it matters to investors because it affects who controls the company, how future gains are split, and how much their investment is protected from downside.
stock options financial
"Pursuant to the exercise of stock options."
Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.
pecuniary interest financial
"disclaims beneficial ownership of these securities except to the extent of his pecuniary interest"
Section 16 of the Securities Exchange Act of 1934 regulatory
"for purposes of Section 16 of the Securities Exchange Act of 1934, as amended"
A provision of federal securities law that requires company insiders—directors, officers and large shareholders—to publicly report their stock holdings and trades and to surrender any “short-swing” profits from purchases and sales within a six-month window. It acts like a rule that forces leaders to announce their trades and prevents quick buy-sell windfalls, giving investors transparency into insider activity and reducing opportunities for unfair gain.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
ELLIS THOMAS B

(Last)(First)(Middle)
867 BOYLSTON STREET
5TH FLOOR #1361

(Street)
BOSTON MASSACHUSETTS 02116

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Guerrilla RF, Inc. [ GUER ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/18/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock(4)06/18/2026M15,625A$3.0532,292D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Series A Convertible Preferred Stock$327.8708/05/2024 (1)Common Stock7,213,1157,213,115I(2)See Footnotes.(2)(3)
Common Stock Purchase Warrants$3.0508/05/202402/05/2030Common Stock2,885,2462,885,246I(2)See Footnotes.(2)(3)
Stock Option(4)$3.0506/18/2026M15,62505/15/202605/15/2036Common Stock15,625$00D
Explanation of Responses:
1. The securities do not have any expiration date.
2. 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.
3. 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.
4. Pursuant to the exercise of stock options.
/s/ Charnice Suggs, Attorney-in-Fact06/23/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Thomas B. Ellis do in this Guerrilla RF (GUER) Form 4 filing?

Ellis exercised stock options to acquire 15,625 shares of Guerrilla RF common stock at $3.05 per share. After this option exercise, his directly held common stock position increased to 32,292 shares, with no same-day sale of these newly acquired shares disclosed.

How many Guerrilla RF (GUER) shares does Ellis hold directly after the transaction?

Following the reported option exercise, Ellis directly owns 32,292 shares of Guerrilla RF common stock. This figure reflects the addition of 15,625 shares acquired through exercising stock options at $3.05 per share, with the options themselves reduced to zero afterward.

What indirect Guerrilla RF (GUER) holdings are associated with NR-PRL Partners?

NR-PRL Partners, LP holds warrants convertible into 2,885,246 Guerrilla RF common shares at $3.05 per share and Series A Convertible Preferred Stock convertible into 7,213,115 common shares. These positions are attributed to NR-PRL entities, with Ellis potentially having an indirect pecuniary interest.

Do the Series A Convertible Preferred shares in GUER have an expiration date?

The filing states that the reported Series A Convertible Preferred Stock does not have any expiration date. These preferred shares are convertible into 7,213,115 Guerrilla RF common shares and are held indirectly through NR-PRL Partners structures associated with the reporting person.

Does Ellis claim full beneficial ownership of the indirect GUER securities?

No. Ellis expressly disclaims beneficial ownership of the indirectly held securities except to the extent of his pecuniary interest. The filing clarifies that NR-PRL Partners, LP and its general partner are the primary holders, with Ellis connected as a member of the general partner entity.