X0609 4 2026-06-23 0001695295 HYDROFARM HOLDINGS GROUP, INC. HYFM 0002059900 Yetter Richard Christopher false 1510 MAIN STREET SHOEMAKERSVILLE PA 19555 1 0 Common Stock, $0.0001 par value per share 2026-06-23 4 A 0 30000 0 A 50000 D Common Stock, $0.0001 par value per share 305000 I Dumont Master Fund LP Includes 30,000 restricted stock units granted under the Issuer's 2020 Equity Incentive Plan which will vest on June 23, 2027. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. /s/ Richard Christopher Yetter 2026-06-25