0001695295 2026-11-10 2026-11-10 0001695295 1 2026-11-10 2026-11-10 0001695295 2 2026-11-10 2026-11-10 0001695295 3 2026-11-10 2026-11-10 0001695295 4 2026-11-10 2026-11-10 iso4217:USD pure shares S-1 S-1 EX-FILING FEES 0001695295 HYDROFARM HOLDINGS GROUP, INC. N/A N/A S-1 HYDROFARM HOLDINGS GROUP, INC. false Equity Common stock, par value $0.0001 per share true 6971575 0.64 4461808.00 0.0000870 388.18 false Equity Common stock, par value $0.0001 per share, issuable upon exercise of pre-funded warrants true 640000 0.64 409600.00 0.0000870 35.64 false Equity Common stock, par value $0.0001 per share, issuable upon exercise of common warrants true 9210975 0.64 5895024.00 0.0000870 512.87 false Equity Common stock, par value $0.0001 per share, issuable upon exercise of placement agent warrants true 736878 0.64 471601.92 0.0000870 41.03 11238033.92 977.72 0.00 0.00 977.72 (1) Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the "Securities Act"), this registration statement shall also cover any additional shares of the registrant's common stock, par value $0.0001 per share (the "Common Stock"), that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the registrant's outstanding shares of common stock. (2) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act based on the average of the high and low prices of the registrant's Common Stock on the Nasdaq Capital Market on November 3, 2026. (1) Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the "Securities Act"), this registration statement shall also cover any additional shares of the registrant's common stock, par value $0.0001 per share (the "Common Stock"), that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the registrant's outstanding shares of common stock. (2) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act based on the average of the high and low prices of the registrant's Common Stock on the Nasdaq Capital Market on November 3, 2026. (1) Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the "Securities Act"), this registration statement shall also cover any additional shares of the registrant's common stock, par value $0.0001 per share (the "Common Stock"), that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the registrant's outstanding shares of common stock. (2) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act based on the average of the high and low prices of the registrant's Common Stock on the Nasdaq Capital Market on November 3, 2026. (1) Pursuant to Rule 416(a) of the Securities Act of 1933, as amended (the "Securities Act"), this registration statement shall also cover any additional shares of the registrant's common stock, par value $0.0001 per share (the "Common Stock"), that become issuable by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without receipt of consideration that increases the number of the registrant's outstanding shares of common stock. (2) Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act based on the average of the high and low prices of the registrant's Common Stock on the Nasdaq Capital Market on November 3, 2026.