B. John Lindeman - 17 Jan 2023 Form 4 Insider Report for HYDROFARM HOLDINGS GROUP, INC. (HYFM)

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	HYFM	Common Stock, $0.0001 par value per share	Award	$0	+2,170	+0.61%	$0.000000	359,265	17 Jan 2023	Direct	F1
transaction	HYFM	Common Stock, $0.0001 par value per share	Tax liability	$1,558	-922	-0.26%	$1.69	358,343	27 Mar 2023	Direct	F2
transaction	HYFM	Common Stock, $0.0001 par value per share	Tax liability	$8,954	-5,298	-1.5%	$1.69	353,045	27 Mar 2023	Direct	F3

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

Id	Content
F1	On March 23, 2022, Mr. Lindeman was granted a target of 8,677 performance stock units ("PSUs") under the Issuer's 2020 Equity Incentive Plan. Each PSU represents the right, upon achievement of certain specified performance-based vesting criteria, to receive one share of the Issuer's common stock. On January 17, 2023, the Compensation Committee of the Board of Directors determined that 25% of the performance-based conditions were met resulting in 2,170 PSUs earned by Mr. Lindeman. This transaction is late due to an inadvertent administrative error and not any error of Mr. Lindeman.
F2	Shares withheld to satisfy tax withholding obligation applicable to the vesting of 2,169 stock-settled PSUs, which may be settled, on a 1-for-1 basis, only in shares of common stock. Fractional amounts have been rounded to the nearest whole number.
F3	Shares withheld to satisfy tax withholding obligation applicable to the vesting of 12,574 stock-settled restricted stock units, which may be settled, on a 1-for-1 basis, only in shares of common stock. Fractional amounts have been rounded to the nearest whole number.