HYFM Hydrofarm Holdings Group, Inc.
Hydrofarm Holdings Group, Inc. (HYFM) Institutional Ownership
What the institutions did with HYFM last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 70.4K | 22.1% |
| BlackRock, Inc. | 50.5K | 15.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 39.7K | 12.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 33.7K | 10.6% |
| CITADEL ADVISORS LLC | 24.0K | 7.5% |
| VANGUARD FIDUCIARY TRUST CO | 18.1K | 5.7% |
| STATE STREET CORP | 16.0K | 5.0% |
| Prentice Capital Management, LP | 14.7K | 4.6% |
| Virtu Financial LLC | 14.7K | 4.6% |
| Compass Ion Advisors, LLC | 10.8K | 3.4% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 10.6K | 3.3% |
| Tower Research Capital LLC (TRC) | 5.4K | 1.7% |
| UBS Group AG | 4.3K | 1.4% |
| JNBA Financial Advisors | 2.0K | 0.6% |
| Vanguard Global Advisers, LLC | 1.3K | 0.4% |
| OSAIC HOLDINGS, INC. | 503 | 0.2% |
| North Star Investment Management Corp. | 370 | 0.1% |
| GROUP ONE TRADING LLC | 338 | 0.1% |
| BNP PARIBAS FINANCIAL MARKETS | 198 | 0.1% |
| Hurley Capital, LLC | 103 | 0.0% |
| MORGAN STANLEY | 90 | 0.0% |
| JONES FINANCIAL COMPANIES LLLP | 75 | 0.0% |
| ROYAL BANK OF CANADA | 8 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Prentice Capital Management, LP | Reduced | 45.5K | 14.7K | -30.7K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 62.6K | 33.7K | -28.9K |
| CITADEL ADVISORS LLC | New | 0 | 24.0K | +24.0K |
| Virtu Financial LLC | New | 0 | 14.7K | +14.7K |
| XTX Topco Ltd | Sold Out | 11.8K | 0 | -11.8K |
| Compass Ion Advisors, LLC | New | 0 | 10.8K | +10.8K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | 0 | 10.6K | +10.6K |
| UBS Group AG | Increased | 962 | 4.3K | +3.4K |
| Tower Research Capital LLC (TRC) | Increased | 2.9K | 5.4K | +2.5K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 72.2K | 70.4K | -1.8K |
| OSAIC HOLDINGS, INC. | Increased | 221 | 503 | +282 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 228 | 198 | -30 |
| Advisory Services Network, LLC | Sold Out | 7 | 0 | -7 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.