HDSN Institutional Ownership & Shareholders
HUDSON TECHNOLOGIES INC (HDSN) is currently held by 146 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $179.08M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Hartree Partners, Lp is currently the largest disclosed institutional shareholder of HDSN tracked by InsiderSet, reporting ownership valued at approximately $25.32M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $19.02M, representing an estimated loss of -24.91% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 63% of the total disclosed HDSN value among the investors covered in this analysis. Major shareholders include Hartree Partners, Lp, Westerly Capital Management, Llc, Blackrock, Inc., and several other long-term asset managers with concentrated positions in HUDSON TECHNOLOGIES INC (HDSN).
This page ranks the largest institutional HDSN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
146
Total Reported Value
$179.08M
Largest Holder
Hartree Partners, Lp
Largest Position
$25.32M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
72
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Hartree Partners, Lp | 5.45% | 4,411,889 | $25,324,243 | $19,015,242 | -$6,309,001 | -24.91% | |
| Westerly Capital Management, Llc | 3.58% | 3,380,000 | $19,401,200 | $14,567,800 | -$4,833,400 | -24.91% | |
| Blackrock, Inc. | 0.00% | 2,840,272 | $16,303,161 | $12,241,572 | -$4,061,589 | -24.91% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,967,914 | $11,294,267 | $8,481,709 | -$2,812,558 | -24.90% | |
| Vanguard Capital Management Llc | 0.00% | 1,654,259 | $9,495,447 | $7,129,856 | -$2,365,591 | -24.91% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 1,442,115 | $8,277,740 | $6,215,516 | -$2,062,224 | -24.91% |
| American Century Companies Inc | 0.00% | 1,169,462 | $6,712,712 | $5,040,381 | -$1,672,331 | -24.91% | |
| Geode Capital Management, Llc | 0.00% | 995,011 | $5,712,680 | $4,288,497 | -$1,424,183 | -24.93% | |
| State Street Corp | 0.00% | 895,776 | $5,141,754 | $3,860,795 | -$1,280,959 | -24.91% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 777,989 | $4,465,657 | $3,353,133 | -$1,112,524 | -24.91% | |
| Caspian Capital Lp | 2.37% | 728,306 | $4,180,476 | $3,138,999 | -$1,041,477 | -24.91% | |
| Qube Research & Technologies Ltd | 0.00% | 721,847 | $4,143,402 | $3,111,161 | -$1,032,241 | -24.91% | |
| Citadel Advisors Llc | 0.00% | 574,266 | $3,296,287 | $2,475,086 | -$821,201 | -24.91% | |
| Jacobs Levy Equity Management, Inc | 0.01% | 506,591 | $2,907,832 | $2,183,407 | -$724,425 | -24.91% | |
| Bridgeway Capital Management, Llc | 0.05% | 494,432 | $2,838,040 | $2,131,002 | -$707,038 | -24.91% | |
| Nuveen, Llc | 0.00% | 476,540 | $2,735,340 | $2,053,887 | -$681,453 | -24.91% | |
| Marshall Wace, Llp | 0.00% | 474,354 | $2,722,791 | $2,044,466 | -$678,325 | -24.91% | |
| D. E. Shaw & Co., Inc. | 0.00% | 409,591 | $2,351,052 | $1,765,337 | -$585,715 | -24.91% | |
| Morgan Stanley | 0.00% | 367,159 | $2,107,493 | $1,582,455 | -$525,038 | -24.91% | |
| Russell Investments Group, Ltd. | 0.00% | 362,489 | $2,080,683 | $1,562,328 | -$518,355 | -24.91% | |
| 683 Capital Management, Llc | 0.17% | 325,000 | $1,865,500 | $1,400,750 | -$464,750 | -24.91% | |
| Jb Capital Partners Lp | 0.27% | 306,200 | $1,757,588 | $1,319,722 | -$437,866 | -24.91% | |
| Ancora Advisors Llc | 0.03% | 303,380 | $1,741,401 | $1,307,568 | -$433,833 | -24.91% | |
| Kerrisdale Advisers, Llc | 0.43% | 299,976 | $1,721,862 | $1,292,897 | -$428,965 | -24.91% | |
| Vanguard Portfolio Management Llc | 0.00% | 290,537 | $1,667,682 | $1,252,214 | -$415,468 | -24.91% | |
| Northern Trust Corp | 0.00% | 282,011 | $1,618,744 | $1,215,467 | -$403,277 | -24.91% | |
| Vanguard Fiduciary Trust Co | 0.00% | 245,071 | $1,406,708 | $1,056,256 | -$350,452 | -24.91% | |
| Empowered Funds, Llc | 0.01% | 205,878 | $1,181,740 | $887,334 | -$294,406 | -24.91% | |
| Bank Of New York Mellon Corp | 0.00% | 204,779 | $1,175,432 | $882,597 | -$292,835 | -24.91% | |
| Goldman Sachs Group Inc | 0.00% | 176,708 | $1,014,304 | $761,611 | -$252,693 | -24.91% | |
| Pacific Ridge Capital Partners, Llc | 0.18% | 174,539 | $1,001,854 | $752,263 | -$249,591 | -24.91% | |
| Kestrel Investment Management Corp | 0.57% | 192,650 | $992,148 | $830,321 | -$161,827 | -16.31% | |
| Aqr Capital Management Llc | 0.00% | 161,903 | $929,324 | $697,802 | -$231,522 | -24.91% | |
| First Trust Advisors Lp | 0.00% | 151,809 | $871,383 | $654,297 | -$217,086 | -24.91% | |
| Marathon Capital Management | 0.18% | 168,325 | $866,874 | $725,481 | -$141,393 | -16.31% | |
| Numerai Gp Llc | 0.07% | 150,254 | $862,458 | $647,595 | -$214,863 | -24.91% | |
| Credit Agricole S A | 0.00% | 140,000 | $803,600 | $603,400 | -$200,200 | -24.91% | |
| Two Sigma Investments, Lp | 0.00% | 131,960 | $757,450 | $568,748 | -$188,702 | -24.91% | |
| Summerhaven Investment Management, Llc | 0.41% | 141,785 | $730,193 | $611,093 | -$119,100 | -16.31% | |
| Wedge Capital Management L L P/Nc | 0.01% | 136,998 | $705,540 | $590,461 | -$115,079 | -16.31% | |
| Prudential Financial Inc | 0.00% | 121,740 | $698,788 | $524,699 | -$174,089 | -24.91% | |
| Charles Schwab Investment Management Inc | 0.00% | 109,013 | $625,735 | $469,846 | -$155,889 | -24.91% | |
| Quantinno Capital Management Lp | 0.00% | 106,964 | $613,973 | $461,015 | -$152,958 | -24.91% | |
| Ameriprise Financial Inc | 0.00% | 98,394 | $564,782 | $424,078 | -$140,704 | -24.91% | |
| Price T Rowe Associates Inc | 0.00% | 95,960 | $551,000 | $413,588 | -$137,412 | -24.94% | |
| Jpmorgan Chase & Co | 0.00% | 93,739 | $513,690 | $404,015 | -$109,675 | -21.35% | |
| Invesco Ltd. | 0.00% | 70,075 | $402,230 | $302,023 | -$100,207 | -24.91% | |
| Squarepoint Ops Llc | 0.00% | 66,220 | $380,103 | $285,408 | -$94,695 | -24.91% | |
| Pinnacle Associates Ltd | 0.00% | 70,007 | $360,536 | $301,730 | -$58,806 | -16.31% | |
| Deutsche Bank Ag\ | 0.00% | 61,117 | $350,812 | $263,414 | -$87,398 | -24.91% |
Frequently asked questions about HDSN
Who are the largest institutional holders of HDSN?
The largest institutional holders of HDSN reported in the latest SEC Form 13F filings include Hartree Partners, Lp, Westerly Capital Management, Llc, Blackrock, Inc., Dimensional Fund Advisors Lp, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported HDSN position.
What is HDSN institutional ownership?
This page tracks HDSN positions reported by institutional investment managers through SEC Form 13F. HUDSON TECHNOLOGIES INC (HDSN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own HDSN?
InsiderSet currently tracks 146 institutional managers reporting HDSN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of HDSN shareholders.
How much HDSN stock do institutions own?
Institutional investment managers disclosed approximately $179.08M in HDSN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was HDSN institutional ownership last updated?
The latest HDSN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional HDSN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its HDSN position after the reporting date.
Are institutions buying or selling HDSN?
Institutional buying and selling can be analyzed by comparing HDSN positions across consecutive 13F reporting periods. InsiderSet's HDSN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View HDSN ownership changes.
How has HDSN institutional ownership changed over time?
InsiderSet tracks HDSN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.