Perma-Fix (PESI) EVP exercises options and uses share withholding

Rhea-AI Filing Summary

Perma-Fix Environmental Services executive Richard Grondin reported multiple stock option exercises and related share withholding. On January 20, 2026, he exercised an incentive stock option for 5,000 shares of common stock at an exercise price of $7.005 per share, with 2,555 shares withheld at a fair market value of $13.71 per share to cover the $35,025 aggregate exercise price. He also exercised a separate incentive stock option for 6,000 shares at an exercise price of $3.95 per share, with 1,729 shares withheld at the same $13.71 fair market value per share to cover the $23,700 aggregate exercise price. Following these transactions, he directly held 41,308 shares of common stock and 12,000 stock options.

SEC Form 4

FORM 4

UNITED 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

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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^*

Grondin Richard

(Last) (First) (Middle)

8302 DUNWOODY PLACE, SUITE 250

(Street)

ATLANTA, GA 30350

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
PERMA FIX ENVIRONMENTAL SERVICES INC [ PESI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP of Hanford & Int. Waste Op

3. Date of Earliest Transaction (Month/Day/Year)
01/20/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/20/2026		M		5,000(1)	A	$7.005	39,592	D
Common Stock	01/20/2026		F		2,555(1)	D	$13.71	37,037	D
Common Stock	01/20/2026		M		6,000(2)	A	$3.95	43,037	D
Common Stock	01/20/2026		F		1,729(2)	D	$13.71	41,308	D

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option	$7.005	01/20/2026		M			5,000(1)	(3)	10/14/2027	Common Stock	5,000	$0	5,000	D
Stock Option	$3.95	01/20/2026		M			6,000(2)	(4)	01/19/2029	Common Stock	6,000	$0	12,000	D

Explanation of Responses:

1. On January 20, 2026, the Reporting Person exercised the incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 5,000 shares of the Company's Common Stock at an exercise price of $7.005 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $35,025. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 2,555 shares of Common Stock ($35,025 divided by $13.71) to pay the aggregate exercise price of the option.

2. January 20, 2026,, the Reporting Person exercised the incentive stock option granted 1/19/2023 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 6,000 shares of the Company's Common Stock at an exercise price of $3.95 per share (the "Option shares"). As permitted by the 2017 Plan, the Reporting Person elected to pay the exercise price of the Option Shares by having the Company withhold from the Option Shares a number of shares having a fair market value equal to the aggregate exercise price of $23,700. Since the fair market value of the Company's Common Stock on January 20, 2026, (as determined in accordance with the 2017 Plan) was $13.71 per share, the Company withheld 1,729 shares of Common Stock ($23,700 divided by $13.71) to pay the aggregate exercise price of the option.

3. Incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan for the purchase of up to 25,000 shares of the Company's Common Stock. The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.

4. Incentive stock option granted 01/19/2023 under the Company's 2017 Stock Option Plan for the purchase of up to 30,000 shares of the Company's Common Stock.The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.

	/s/ Richard Grondin	01/21/2026
	** Signature of Reporting Person	Date
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).
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FAQ

What insider activity did PESI executive Richard Grondin report?

Richard Grondin, EVP of Hanford & Int. Waste Op at Perma-Fix Environmental Services (PESI), reported exercising two incentive stock options on January 20, 2026, and using share withholding to pay the exercise prices.

How many Perma-Fix (PESI) options did the EVP exercise?

He exercised incentive stock options for 5,000 shares of common stock at an exercise price of $7.005 per share and 6,000 shares at an exercise price of $3.95 per share.

How were the option exercise costs paid in this PESI Form 4?

For the 5,000-share option, the $35,025 aggregate exercise price was paid by withholding 2,555 shares valued at $13.71 per share. For the 6,000-share option, the $23,700 aggregate exercise price was paid by withholding 1,729 shares at the same fair market value.

What is the reported fair market value of PESI stock used in the transactions?

The fair market value of Perma-Fix Environmental Services common stock used to calculate the share withholding on January 20, 2026, was reported as $13.71 per share.

How many PESI shares does the EVP hold after these transactions?

After the reported transactions, Richard Grondin directly held 41,308 shares of Perma-Fix Environmental Services common stock and 12,000 stock options.

What are the terms of the incentive stock options reported by PESI?

One incentive stock option was granted on October 14, 2021 for up to 25,000 shares, and another on January 19, 2023 for up to 30,000 shares. Each option has a 6-year term and vests over 5 years in equal 1/5 annual increments under the company’s 2017 Stock Option Plan.