X0306 4 2020-12-14 0 0001695295 HYDROFARM HOLDINGS GROUP, INC. HYFM 0001686696 Toler William Douglas 202 SAN MATEO DRIVE BONITA SPRINGS FL 34134 1 1 0 0 CEO and Chairman of the Board Common Stock 2020-12-14 4 C 0 423757 A 1871962 D Series A Convertible Preferred Stock 2020-12-14 4 C 0 423757 0 D Common Stock 423757 0 D The Series A convertible preferred stock (the "Series A Preferred Stock") was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. On December 14, 2020, each share of the Series A Preferred Stock automatically converted into shares of the Issuer's common stock on a one-for-one basis upon the closing of the Issuer's initial public offering for no additional consideration. The Series A Preferred Stock had no expiration date. The number of shares of the Issuer's common stock reflects a 1-for-3.3712 reverse split of each share of the Issuer's common stock effected on November 24, 2020. /s/ Ashna Pai, Power of Attorney For: William Toler 2020-12-14