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Guerrilla RF (GUER) CFO reports new stock option grant and RSU holdings

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

Rhea-AI Filing Summary

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.

Positive

  • None.

Negative

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Insider John-Williams Michael
Role Chief Financial Officer
Type Security Shares Price Value
Grant/Award Stock Option 32,500 $0.00 --
holding Restricted Stock Unit -- -- --
holding Common Stock -- -- --
Grant/Award Stock Option 46,534 $0.00 --
Holdings After Transaction: Stock Option — 32,500 shares (Direct, null); Restricted Stock Unit — 16,395 shares (Direct, null); Common Stock — 9,870 shares (Direct, null)
Footnotes (1)
  1. Each restricted stock unit represents a contingent right to receive one share of common stock upon vesting of the unit. 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. No expiration date. 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. 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.
Common stock held 9,870 shares Direct holdings following reported transactions
RSUs held 16,395 units Each unit represents one common share upon vesting
New option grant 32,500 options at $6.00 Stock options granted on May 15, 2026
Prior option grant 46,534 options at $3.05 Stock options granted on November 17, 2025
Vested options from earlier grant 15,509 options Portion of prior option grant already vested per footnote
RSU vesting start 512 units on June 8, 2026 Initial RSU vesting installment; further monthly vesting to December 8, 2028
Final RSU vesting 523 units on January 8, 2029 Final RSU tranche subject to continued service
New option expiration May 15, 2036 Expiration date for 32,500 options at $6.00
Restricted Stock Unit financial
"Each restricted stock unit represents a contingent right to receive one share of common stock upon vesting of the unit."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
Stock Option financial
"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;"
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
vesting financial
"The restricted stock units vest as follows:(i) 512 units on 6/8/2026, and monthly thereafter through 12/8/2028;"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
exercise price financial
"conversion_or_exercise_price": "6.0000""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
expiration date financial
"expiration_date": "2036-05-15T00:00:00.000Z""
The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.
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*
John-Williams Michael

(Last)(First)(Middle)
2000 PISGAH CHURCH RD

(Street)
GREENSBORO NORTH CAROLINA 27455

(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026
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 Stock9,870D
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
Restricted Stock Unit(1) (2) (3)Common Stock16,39516,395D
Stock Option$3.0511/17/2025A46,534 (4)11/17/2035Common Stock46,534$046,534D
Stock Option$605/15/2026A32,500 (5)05/15/2036Common Stock32,500$032,500D
Explanation of Responses:
1. Each restricted stock unit represents a contingent right to receive one share of common stock upon vesting of the unit.
2. 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.
3. No expiration date.
4. 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.
5. 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.
/s/ Mike John-Williams05/19/2026
** 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 Guerrilla RF (GUER) CFO John-Williams Michael report in this Form 4?

The Form 4 shows CFO John-Williams Michael’s updated equity holdings, including common stock, restricted stock units, and stock options. It reflects compensation-related grants and vesting schedules rather than open-market buying or selling activity.

How many Guerrilla RF (GUER) common shares does the CFO hold after these transactions?

After the reported transactions, the CFO directly holds 9,870 shares of Guerrilla RF common stock. These are separate from his restricted stock units and stock options, which give him rights to additional shares over time as they vest.

What stock option grants for Guerrilla RF (GUER) are reported for the CFO?

The filing reports two option awards: 32,500 stock options granted on May 15, 2026 at a $6.00 exercise price, and 46,534 options from November 17, 2025 at a $3.05 exercise price. These represent rights to buy Guerrilla RF common shares in the future.

What restricted stock units (RSUs) does the Guerrilla RF (GUER) CFO hold?

The CFO holds 16,395 restricted stock units, each representing a contingent right to receive one Guerrilla RF common share upon vesting. Footnotes explain that these RSUs vest in multiple installments between June 8, 2026 and January 8, 2029.

Are the Guerrilla RF (GUER) CFO’s equity awards immediately exercisable or fully vested?

The awards are not fully vested. Footnotes state that only 15,509 option shares from an earlier grant have vested so far, and remaining options and RSUs vest in scheduled tranches through 2028, 2029 and 2030, subject to continued service.

Does this Guerrilla RF (GUER) Form 4 show the CFO buying or selling shares on the market?

The Form 4 does not show open-market purchases or sales. It reflects grants and holdings of stock options, restricted stock units, and common shares, with no transactions coded as buys or sells in the reported data.