Hydrofarm Holdings Group, Inc.

HYFM·NASDAQ·$0.99Share Price as of 11/2·$5MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/14/26 10-QQ1 ended 03/31/2605/15/26 10-KFY 202503/27/26 10-QQ3 ended 09/30/2511/12/25 10-QQ2 ended 06/30/2508/12/25

Disclosures

8-KCurrent report10/27/26 8-KCurrent report10/27/26 8-KCurrent report10/09/26 8-KCurrent report08/14/26 8-KCurrent report08/06/26

Prospectuses and Registrations

424B5Prospectus supplement10/29/26 424B3Prospectus12/10/25 S-3Shelf registration11/12/25 S-8Registration of securities for employees03/05/25 S-8Registration of securities for employees02/29/24

Proxies

DEFA14AAdditional proxy materials05/28/26 DEF 14ADefinitive proxy04/30/26 DEFA14AAdditional proxy materials04/30/26 DEFA14AAdditional proxy materials06/04/25 DEF 14ADefinitive proxy04/17/25

Ownership

Form 4Insider transaction10/29/26 Form 4Insider transaction10/29/26 Form 4Insider transaction10/29/26 Form 4Insider transaction10/29/26 Form 4Insider transaction08/11/26

Other

ARSAnnual report to shareholders04/30/26 EFFECTRequest for effectiveness12/10/25 CORRESPCorrespondence with the SEC12/08/25 ARSAnnual report to shareholders04/17/25 ARSAnnual report to shareholders04/17/24