Hydrofarm Holdings Group, Inc. (HYFM) Institutional Ownership

Ownership Summary

Hydrofarm Holdings Group, Inc. (NASDAQ:HYFM) showed up in the 13F filings of 22 institutional investors as of December 2025.

• Collectively, these holders controlled 9.2% of Hydrofarm Holdings's outstanding shares in December 2025, down from 14.3% in September 2025.
• Their total shares held in HYFM decreased -11.42% quarter over quarter, and separately, investors owning Hydrofarm Holdings decreased 54.17% from a year ago.
• Among the 22 funds, 5 bought more Hydrofarm Holdings shares, 9 sold down, and 8 held their ground.
• In total, institutional investors held 429.6K shares in Hydrofarm Holdings as of December 2025, down by 55.38K shares quarter on quarter, and down 6.83Mn shares year over year.
• As of December 31, 2025, the biggest holder of Hydrofarm Holdings is RENAISSANCE TECHNOLOGIES LLC at 72.16K shares, representing 1.55% of shares outstanding.
• The biggest buyers of Hydrofarm Holdings for the quarter ending December 2025 included VANGUARD CAPITAL MANAGEMENT LLC (39.68K), VANGUARD FIDUCIARY TRUST CO (18.08K), GEODE CAPITAL MANAGEMENT, LLC (14.99K), XTX Topco Ltd (11.78K), Vanguard Global Advisers, LLC (1.27K).
• Leading sellers of Hydrofarm Holdings shares for the quarter ending December 2025 were UBS Group AG (3.96K), Tower Research Capital LLC (TRC) (652), RENAISSANCE TECHNOLOGIES LLC (300), Morgan Stanley (171), OSAIC HOLDINGS, INC. (30).
• According to Business Quant data, leading holders of HYFM for December 2025 are RENAISSANCE TECHNOLOGIES LLC (72.16K), GEODE CAPITAL MANAGEMENT, LLC (62.59K), BlackRock, Inc. (50.46K), Prentice Capital Management, LP (45.47K), VANGUARD CAPITAL MANAGEMENT LLC (39.68K), VANGUARD FIDUCIARY TRUST CO (18.08K), State Street Corp (16.02K), XTX Topco Ltd (11.78K), Tower Research Capital LLC (TRC) (2.91K), JNBA Financial Advisors (2.0K).