Mark Duff - May 22, 2023 Form 4 Insider Report for PERMA FIX ENVIRONMENTAL SERVICES INC (PESI)

Role: President and CEO, Director
Signature: /s/ Mark Duff
Stock symbol: PESI
Transactions as of: May 22, 2023
Transactions value $: -$4
Form type: 4
Date filed: 5/24/2023, 10:41 AM
Previous filing: Jan 23, 2023
Next filing: Dec 4, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PESI	Common Stock	Options Exercise	$365K	+100K	+244%	$3.65	141K	May 22, 2023	Direct	F1
transaction	PESI	Common Stock	Tax liability	-$365K	-33K	-23.43%	$11.05	108K	May 22, 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PESI	Stock Option	Options Exercise	$0	-100K	-100%	$0.00^*	0	May 22, 2023	Common Stock	100K	$3.65	Direct	F1, F2
holding	PESI	Stock Option						25K	May 22, 2023	Common Stock	25K	$3.15	Direct	F3
holding	PESI	Stock Option						50K	May 22, 2023	Common Stock	50K	$7.01	Direct	F4
holding	PESI	Stock Option						70K	May 22, 2023	Common Stock	70K	$3.95	Direct	F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	On May 22, 2023, the Reporting Person exercised the incentive stock option granted 07/27/2017 under the Company's 2017 Stock Option Plan (the "2017 Plan") for the purchase of 100,000 shares of the Company's Common Stock at an exercise price of $3.65 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 $365,000. Since the fair market value of the Company's Common Stock on May 22, 2023 (as determined in accordance with the 2017 Plan) was $11.05 per share, the Company withheld 33,032 shares of Common Stock ($365,000 divided by $11.05) to pay the aggregate exercise price of the option.
F2	Incentive stock option granted 07/27/2017 under the Company's 2017 Stock Option Plan. The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.
F3	Incentive Stock Option granted 01/17/2019 under the Company's 2017 Stock Option Plan. The Option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.
F4	Incentive stock option granted 10/14/2021 under the Company's 2017 Stock Option Plan. The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.
F5	Incentive stock option granted 01/19/2023 under the Company's 2017 Stock Option Plan. The option is for a 6 year period and vests over a 5 year period, at 1/5 increment per year.