HYFM
Hydrofarm Holdings Group, Inc.Company with tickers: HYFM
CIK
1695295
CUSIP
44888K407
Shares Outstanding
4,764,612
13F Activity (30d)
18 filings
16 filers
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 20
Total Value: $284,938
Total Shares: 279,360
Institutional Ownership Trend
Holder Concentration
Across 20 13F filers · Δ vs Dec 31, 2025Top Holder
25.8%
−6.3 pts
Top 5
87.0%
+0.3 pts
Top 10
99.1%
−0.3 pts
HHI
1,792
Moderately concentrated
−83
Quarterly Activity
vs Dec 31, 2025
New
5
Increased
2
Decreased
6
Sold Out
6
Unchanged
7
Holder count:
-1
Institutional value:
-50.9%
Shares held:
-27.3%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega GEODE CAPITAL MANAGEMENT, LLC | +14,989 | 62,586 | |
| Mega BNP PARIBAS ARBITRAGE, SA | +23 | 228 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega UBS Group AG | −3,963 | 962 | |
| Mid Tower Research Capital LLC (TRC) | −652 | 2,911 | |
| Large RENAISSANCE TECHNOLOGIES LLC | −300 | 72,163 | |
| Mega MORGAN STANLEY | −171 | 90 | |
| Large OSAIC HOLDINGS, INC. | −30 | 221 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 39,683 | $40,476 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 18,082 | $18,443 | |
| Mid XTX Topco Ltd | 11,784 | $12,019 | |
| Mega Vanguard Global Advisers, LLC | 1,269 | $1,294 | |
| Mid Advisory Services Network, LLC | 7 | $7 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 123,586 | $186,613 | |
| Mid DRW Securities, LLC | 38,840 | $58,648 | |
| Mega JANE STREET GROUP, LLC | 22,716 | $34,300 | |
| Mega WELLS FARGO & COMPANY/MN | 300 | $453 | |
| Mega BANK OF AMERICA CORP /DE/ | 41 | $61 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Large RENAISSANCE TECHNOLOGIES LLC | $73,606 | 25.83% | 72,163 | Shares | Sole | 2026-05-14 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $63,837 | 22.40% | 62,586 | Shares | Defined | 2026-05-15 | ||||
| Mega BlackRock, Inc. | $51,474 | 18.06% | 50,465 | Shares | Sole | 2026-05-13 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $40,476 | 14.21% | 39,683 | Shares | Defined | 2026-05-15 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $18,443 | 6.47% | 18,082 | Shares | Defined | 2026-05-08 | ||||
| Mega STATE STREET CORP | $16,335 | 5.73% | 16,015 | Shares | Defined | 2026-05-15 | ||||
| Mid XTX Topco Ltd | $12,019 | 4.22% | 11,784 | Shares | Defined | 2026-05-15 | ||||
| Mid Tower Research Capital LLC (TRC) | $2,969 | 1.04% | 2,911 | Shares | Defined | 2026-05-15 | ||||
| Small JNBA Financial Advisors | $2,040 | 0.72% | 2,000 | Shares | Sole | 2026-04-23 | ||||
| Mega Vanguard Global Advisers, LLC | $1,294 | 0.45% | 1,269 | Shares | Defined | 2026-05-08 | ||||
| Mega UBS Group AG | $980 | 0.34% | 962 | Shares | Defined | 2026-05-05 | ||||
| Mid North Star Investment Management Corp. | $377 | 0.13% | 370 | Shares | Sole | 2026-04-23 | ||||
| Mid GROUP ONE TRADING LLC | $344 | 0.12% | 338 | Shares | Sole | 2026-05-13 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $232 | 0.08% | 228 | Shares | Defined | 2026-05-12 | ||||
| Large OSAIC HOLDINGS, INC. | $225 | 0.08% | 221 | Shares | Defined | 2026-05-15 | ||||
| Micro Hurley Capital, LLC | $105 | 0.04% | 103 | Shares | Sole | 2026-05-06 | ||||
| Mega MORGAN STANLEY | $91 | 0.03% | 90 | Shares | Defined | 2026-05-15 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $76 | 0.03% | 75 | Shares | Sole | 2026-05-15 | ||||
| Mega ROYAL BANK OF CANADA Bank | $8 | 0.00% | 8 | Shares | Defined | 2026-05-15 | ||||
| Mid Advisory Services Network, LLC | $7 | 0.00% | 7 | Shares | Sole | 2026-05-15 | ||||
| No holders match your search. | ||||||||||