Who owns HUDSON TECHNOLOGIES INC /NY?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of HDSN from SEC Form 13F filings across 151 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 151 institutions disclosed 31.6M shares of HUDSON TECHNOLOGIES INC /NY worth $181.4M — about 75.1% of shares outstanding; the largest disclosed holder is Hartree Partners, LP. Source: SEC Form 13F filings, parsed by EvidInvest.
151
13F holders
$181.4M
value, 2026 filers
75.1%
of shares outstanding (31.6M sh)
25
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of HDSN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Hartree Partners, LP | 4.4M | $25.3M | 5.4% | 10.5% | +16.1% |
| 2 | WESTERLY CAPITAL MANAGEMENT, LLC | 3.4M | $19.4M | 3.6% | 8% | +6.5% |
| 3 | BlackRock, Inc. | 2.8M | $16.3M | 0.0% | 6.8% | -0.8% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 2.0M | $11.3M | 0.0% | 4.7% | -8.4% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1.7M | $9.5M | 0.0% | 3.9% | -0.4% |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 1.4M | $8.3M | 0.0% | 3.4% | -4.1% |
| 7 | AMERICAN CENTURY COMPANIES INC | 1.2M | $6.7M | 0.0% | 2.8% | -21.4% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 995,011 | $5.7M | 0.0% | 2.4% | +4.9% |
| 9 | STATE STREET CORP | 895,776 | $5.1M | 0.0% | 2.1% | -0.2% |
| 10 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 777,989 | $4.5M | 0.0% | 1.8% | -11.7% |
| 11 | CASPIAN CAPITAL LP | 728,306 | $4.2M | 2.4% | 1.7% | 0.0% |
| 12 | Qube Research & Technologies Ltd | 721,847 | $4.1M | 0.0% | 1.7% | +94.6% |
| 13 | CITADEL ADVISORS LLC | 574,266 | $3.3M | 0.0% | 1.4% | +39.1% |
| 14 | JACOBS LEVY EQUITY MANAGEMENT, INC | 506,591 | $2.9M | 0.0% | 1.2% | +183.1% |
| 15 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 494,432 | $2.8M | 0.0% | 1.2% | -0.7% |
| 16 | Nuveen, LLC | 476,540 | $2.7M | 0.0% | 1.1% | +469.2% |
| 17 | MARSHALL WACE, LLP | 474,354 | $2.7M | 0.0% | 1.1% | +116.3% |
| 18 | D. E. Shaw & Co., Inc. | 409,591 | $2.4M | 0.0% | 1% | +14.2% |
| 19 | MORGAN STANLEY | 367,159 | $2.1M | 0.0% | 0.9% | -22.2% |
| 20 | Russell Investments Group, Ltd. | 362,489 | $2.1M | 0.0% | 0.9% | +134.8% |
| 21 | 683 Capital Management, LLC | 325,000 | $1.9M | 0.1% | 0.8% | 0.0% |
| 22 | JB CAPITAL PARTNERS LP | 306,200 | $1.8M | 0.3% | 0.7% | 0.0% |
| 23 | Ancora Advisors LLCNEW | 303,380 | $1.7M | 0.0% | 0.7% | new |
| 24 | Kerrisdale Advisers, LLC | 299,976 | $1.7M | 0.4% | 0.7% | +420.6% |
| 25 | VANGUARD PORTFOLIO MANAGEMENT LLC | 290,537 | $1.7M | 0.0% | 0.7% | +8.2% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.