SCHEDULE 13D 0002059900 XXXXXXXX LIVE Common Stock 10/01/2025 false 0001695295 44888K407 HYDROFARM HOLDINGS GROUP, INC.

1510 MAIN STREET SHOEMAKERSVILLE PA 19555

Dumont Global LP 212-705-8180 261 Madison Avenue, #1008 New York NY 10016 0001803609 N Dumont Global LP OO N DE 0.00 305000.00 0.00 305000.00 305000.00 N 6.55 IA Y Dumont Fund Partners LLC OO N DE 0.00 305000.00 0.00 305000.00 305000.00 N 6.55 OO 0001909738 N Dumont Master Fund LP WC N DE 0.00 305000.00 0.00 305000.00 305000.00 N 6.55 OO 0002059900 N Christopher Richard Yetter OO N X1 0.00 305000.00 0.00 305000.00 305000.00 N 6.55 IN Common Stock HYDROFARM HOLDINGS GROUP, INC. 1510 MAIN STREET SHOEMAKERSVILLE PA 19555 The names of the persons filing this Schedule 13G are: Dumont Global LP, a Delaware limited partnership ("DG"); Dumont Fund Partners LLC, a Delaware limited liability company ("DFP"); Dumont Master Fund LP, a Cayman Islands exempted limited partnership (the "Fund"); and Chris Yetter, a U.S. citizen. Chris Yetter is (i) the manager of Dumont Global Partners LLC, which is the general partner of DG, and (ii) the general partner of DFP. DFP is the general partner of the Fund and DG is the investment manager of the Fund. The Fund, DG, DFP and Chris Yetter are collectively referred to herein as the "Reporting Persons". The principal business address of the Reporting Persons is 261 Madison Avenue #1008, New York, NY 10016. The Fund, DG and DFP are engaged in the business of investing in securities. DG and DFP are organized under the laws of the state of Delaware. The Fund is organized as an exempted limited partnership under the laws of the Cayman Islands. Chris Yetter is a United States citizen. None of the Reporting Persons nor any manager or executive officer of the Reporting Persons, has, during the past five years, (a) been convicted in a criminal, or (b) been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting, or mandating activities subject to, Federal or State securities laws or a finding of any violation with respect to such laws. Not applicable United States citizen. Dumont Master Fund LP acquired shares in the Issuer prior to 2025, as was filed in 13-G. Dumont Master Fund LP acquired shares in the Issuer prior to 2025, as detailed in its 13-G filing. On October 1, 2025, Chris Yetter was appointed to the Issuer's Board of the Directors, leading to the recategorizing this filing as a 13-D. As of the date hereof, the Reporting Persons may be deemed to beneficially own, in the aggregate, 305,000 share of Common Stock, representing approximately 6.55% of the Issuer's outstanding shares of Common Stock, based on 4,659,020 shares outstanding as of August 4, 2025, as disclosed in by the Issuer in its Form 10-Q for the quarterly period ended June 30, 2025. The Fund has sole voting and sole dispositive power regarding the 305,000 share of common stock. DG, DFP, and Mr. Yetter, have shared voting power and shared dispositive power with regard to such shares of common stock. Not applicable Not applicable Not applicable CY: I think nothing to report here; but not sure None Dumont Global LP /s/ Richard Christopher Yetter 10/14/2025 Dumont Fund Partners LLC /s/ Richard Christopher Yetter 10/14/2025 Dumont Master Fund LP /s/ Richard Christopher Yetter 10/14/2025 Christopher Richard Yetter /s/ Christopher Richard Yetter 10/14/2025 None.