Hydrofarm Holdings Group, Inc.
Hydrofarm Holdings Group, Inc. (HYFM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · HYFM · as of Sep 30, 2025
Ownership Breakdown
26
Institutional Holders
▲ 2 vs Q2
$2.04M
Total Inst. Value
▼ $192,294 vs Q2
4.76M
Shares Outstanding
freeFloat 75.58%
620,365
13F Shares Held
▲ 23,221 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
HYFM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC wholesale-miscellaneous nondurable goods | 187.6K | 4.04% | 4.04% | $617.26M | Nov 7, 2025 | — held |
TEXAS CAPITAL BANK WEALTH MANAGEMENT SERVICES INC wholesale-miscellaneous nondurable goods | 132.1K | 2.84% | 2.84% | $434.45M | Nov 13, 2025 | — held |
RENAISSANCE TECHNOLOGIES LLC wholesale-miscellaneous nondurable goods | 73.8K | 1.59% | 1.59% | $242.68M | Nov 13, 2025 | ▲ 400 |
BLACKROCK, INC. wholesale-miscellaneous nondurable goods | 50.5K | 1.09% | 1.09% | $166.03M | Nov 12, 2025 | — held |
GEODE CAPITAL MANAGEMENT, LLC wholesale-miscellaneous nondurable goods | 47.6K | 1.02% | 1.02% | $156.63M | Nov 12, 2025 | ▲ 52 |
UBS GROUP AG wholesale-miscellaneous nondurable goods | 43.2K | 92.90% | 92.90% | $142.00M | Nov 13, 2025 | ▼ 2.0K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP wholesale-miscellaneous nondurable goods | 33.7K | 72.55% | 72.55% | $110.90M | Nov 14, 2025 | ▲ 4.8K |
CITADEL ADVISORS LLC wholesale-miscellaneous nondurable goods | 18.1K | 38.91% | 38.91% | $59.48M | Nov 14, 2025 | NEW |
STATE STREET CORP wholesale-miscellaneous nondurable goods | 16.0K | 34.47% | 34.47% | $52.69M | Nov 14, 2025 | — held |
DRW SECURITIES, LLC wholesale-miscellaneous nondurable goods | 10.7K | 23.13% | 23.13% | $35.36M | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
4
Increased
+5.4K shares4
New Positions
first time holders7
Decreased
−3.9K shares2
Sold Out
fully exitedNet shares change (top 50)
+1.4K
+5.4K / −3.9K
Net new holders
-1
4 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
HYFM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
4
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Toler William Douglas Chief Executive Officer | Jan 6, 2026 | Tax Withhold | 5,189 | $1.51 | $7.8K | 221.7K | Form 4 ↗ |
PARKER MARK S President | Jan 6, 2026 | Tax Withhold | 1,672 | $1.51 | $2.5K | 19.3K | Form 4 ↗ |
O'Brien Kevin Patrick Chief Financial Officer | Jan 6, 2026 | Sale | 1,150 | $1.51 | $1.7K | 13.2K | Form 4 ↗ |
Ackerman Erica CAO and Corporate Controller | Jan 6, 2026 | Tax Withhold | 687 | $1.51 | $1.0K | 7.5K | Form 4 ↗ |
Denis Melisa director | Dec 4, 2025 | Sale | 2,875 | $1.88 | $5.4K | 58.5K | Form 4 ↗ |
Denis Melisa director | Dec 5, 2025 | Sale | 120 | $1.92 | $230.4 | 58.4K | Form 4 ↗ |
Yetter Richard Christopher director | Oct 1, 2025 | Award | 20,000 | — | — | 20.0K | Form 4 ↗ |
Toler William Douglas Executive Chairman of Board | Aug 18, 2025 | Tax Withhold | 445 | $4.51 | $2.0K | 226.9K | Form 4 ↗ |
O'Brien Kevin Patrick Chief Financial Officer | Aug 18, 2025 | Tax Withhold | 48 | $4.51 | $216.48 | 14.4K | Form 4 ↗ |
PARKER MARK S President | Aug 18, 2025 | Tax Withhold | 370 | $4.51 | $1.7K | 21.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Hydrofarm Holdings Group, Inc. (HYFM) is primarily owned by institutional investors, who hold approximately 13.0% of total shares outstanding. Company insiders own approximately 24.42%, while retail and public investors account for the remaining 62.56%.
The largest institutional shareholder of Hydrofarm Holdings Group, Inc. is VANGUARD GROUP INC, holding approximately 187,616 shares — equal to 4.04% of outstanding shares — as of September 30, 2025.
A total of 26 institutional investors currently hold HYFM stock, with a combined institutional value of approximately $2,041,061 as of the most recent 13F filing period.
Frequently asked questions
HYFM ownershipHydrofarm Holdings Group, Inc. (HYFM) is primarily owned by institutional investors, who hold approximately 13.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 4.04% stake. Company insiders hold 24.42%. Data sourced from SEC Form 13F as of September 30, 2025.