Hydrofarm Holdings HYFM Institutional Ownership

Updated Oct 11, 2026

Hydrofarm Holdings Group, Inc. (NASDAQ:HYFM) was held by 23 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• Collectively, these holders controlled 6.60% of Hydrofarm Holdings' outstanding shares in Q2 2026, down from 6.82% in Q1 2026.
• Total holdings of HYFM shares fell 2.17% from Q1 2026, and the holder count was unchanged from Q2 2025.
• Among the 23 holders of Hydrofarm Holdings, 7 added to their positions, 4 reduced their stakes and 12 left their positions unchanged.
• In total, institutional investors held 317.77K shares of Hydrofarm Holdings at the end of Q2 2026, down 7.06K from the prior quarter and down 276.44K from a year earlier.
• Renaissance Technologies LLC was the top holder of Hydrofarm Holdings as of June 30, 2026, with 70.36K shares, or 1.46% of shares outstanding.
• Among holders that already owned Hydrofarm Holdings, the biggest buyers in Q2 2026 were UBS Group AG (+3.37K shares), Tower Research Capital LLC (+2.53K shares) and Osaic Holdings, Inc. (+282 shares).
• On the other side, among holders that kept a position in Hydrofarm Holdings, the largest reductions in Q2 2026 came from Prentice Capital Management, LP (-30.73K shares), Geode Capital Management, LLC (-28.93K shares), Renaissance Technologies LLC (-1.8K shares) and BNP Paribas Financial Markets (-30 shares).
• Per Business Quant, the top 10 investors in HYFM for the quarter ended June 30, 2026 were Renaissance Technologies LLC (70.36K shares), BlackRock, Inc. (50.47K shares), Vanguard Capital Management LLC (39.68K shares), Geode Capital Management, LLC (33.66K shares), Citadel Advisors LLC (23.98K shares), Vanguard Fiduciary Trust Co (18.08K shares), State Street Corp (16.02K shares), Prentice Capital Management, LP (14.74K shares), Virtu Financial LLC (14.7K shares) and Compass Ion Advisors, LLC (10.75K shares).