HUDSON TECHNOLOGIES INC (HDSN) Institutional Shareholders
HUDSON TECHNOLOGIES INC (HDSN) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $182.40M in HDSN holdings during the latest filing period.
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 $25.02M, representing an estimated loss of -1.22% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 61% 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
154
Total Reported Value
$182.40M
Largest Holder
Hartree Partners, Lp
Largest Position
$25.32M
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
95
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 | $25,015,411 | -$308,832 | -1.22% | |
| Westerly Capital Management, Llc | 3.58% | 3,380,000 | $19,401,200 | $19,164,600 | -$236,600 | -1.22% | |
| Blackrock, Inc. | 0.00% | 2,840,272 | $16,303,161 | $16,104,342 | -$198,819 | -1.22% | |
| Dimensional Fund Advisors Lp | 0.00% | 1,967,914 | $11,294,267 | $11,158,072 | -$136,195 | -1.21% | |
| Vanguard Capital Management Llc | 0.00% | 1,654,259 | $9,495,447 | $9,379,649 | -$115,798 | -1.22% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 1,442,115 | $8,277,740 | $8,176,792 | -$100,948 | -1.22% |
| American Century Companies Inc | 0.00% | 1,169,462 | $6,712,712 | $6,630,850 | -$81,862 | -1.22% | |
| Geode Capital Management, Llc | 0.00% | 995,011 | $5,712,680 | $5,641,712 | -$70,968 | -1.24% | |
| State Street Corp | 0.00% | 895,776 | $5,141,754 | $5,079,050 | -$62,704 | -1.22% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 777,989 | $4,465,657 | $4,411,198 | -$54,459 | -1.22% | |
| Caspian Capital Lp | 2.37% | 728,306 | $4,180,476 | $4,129,495 | -$50,981 | -1.22% | |
| Qube Research & Technologies Ltd | 0.00% | 721,847 | $4,143,402 | $4,092,872 | -$50,530 | -1.22% | |
| Citadel Advisors Llc | 0.00% | 574,266 | $3,296,287 | $3,256,088 | -$40,199 | -1.22% | |
| Jacobs Levy Equity Management, Inc | 0.01% | 506,591 | $2,907,832 | $2,872,371 | -$35,461 | -1.22% | |
| Bridgeway Capital Management, Llc | 0.05% | 494,432 | $2,838,040 | $2,803,429 | -$34,611 | -1.22% | |
| Nuveen, Llc | 0.00% | 476,540 | $2,735,340 | $2,701,982 | -$33,358 | -1.22% | |
| Marshall Wace, Llp | 0.00% | 474,354 | $2,722,791 | $2,689,587 | -$33,204 | -1.22% | |
| Public Employees Retirement System Of Ohio | 0.01% | 410,099 | $2,411,382 | $2,325,261 | -$86,121 | -3.57% | |
| D. E. Shaw & Co., Inc. | 0.00% | 409,591 | $2,351,052 | $2,322,381 | -$28,671 | -1.22% | |
| Morgan Stanley | 0.00% | 367,159 | $2,107,493 | $2,081,792 | -$25,701 | -1.22% | |
| Russell Investments Group, Ltd. | 0.00% | 362,489 | $2,080,683 | $2,055,313 | -$25,370 | -1.22% | |
| 683 Capital Management, Llc | 0.17% | 325,000 | $1,865,500 | $1,842,750 | -$22,750 | -1.22% | |
| Jb Capital Partners Lp | 0.27% | 306,200 | $1,757,588 | $1,736,154 | -$21,434 | -1.22% | |
| Ancora Advisors Llc | 0.03% | 303,380 | $1,741,401 | $1,720,165 | -$21,236 | -1.22% | |
| Kerrisdale Advisers, Llc | 0.43% | 299,976 | $1,721,862 | $1,700,864 | -$20,998 | -1.22% | |
| Vanguard Portfolio Management Llc | 0.00% | 290,537 | $1,667,682 | $1,647,345 | -$20,337 | -1.22% | |
| Northern Trust Corp | 0.00% | 282,011 | $1,618,744 | $1,599,002 | -$19,742 | -1.22% | |
| Vanguard Fiduciary Trust Co | 0.00% | 245,071 | $1,406,708 | $1,389,553 | -$17,155 | -1.22% | |
| Bank Of New York Mellon Corp | 0.00% | 204,779 | $1,175,432 | $1,161,097 | -$14,335 | -1.22% | |
| Kestrel Investment Management Corp | 0.63% | 200,750 | $1,152,305 | $1,138,253 | -$14,053 | -1.22% | |
| Empowered Funds, Llc | 0.01% | 194,555 | $1,143,983 | $1,103,127 | -$40,856 | -3.57% | |
| Goldman Sachs Group Inc | 0.00% | 176,708 | $1,014,304 | $1,001,934 | -$12,370 | -1.22% | |
| Pacific Ridge Capital Partners, Llc | 0.18% | 174,539 | $1,001,854 | $989,636 | -$12,218 | -1.22% | |
| Marathon Capital Management | 0.20% | 173,325 | $994,886 | $982,753 | -$12,133 | -1.22% | |
| Aqr Capital Management Llc | 0.00% | 161,903 | $929,324 | $917,990 | -$11,334 | -1.22% | |
| First Trust Advisors Lp | 0.00% | 151,809 | $871,383 | $860,757 | -$10,626 | -1.22% | |
| Numerai Gp Llc | 0.07% | 150,254 | $862,458 | $851,940 | -$10,518 | -1.22% | |
| Credit Agricole S A | 0.00% | 140,000 | $803,600 | $793,800 | -$9,800 | -1.22% | |
| Wedge Capital Management L L P/Nc | 0.01% | 137,618 | $789,927 | $780,294 | -$9,633 | -1.22% | |
| Two Sigma Investments, Lp | 0.00% | 131,960 | $757,450 | $748,213 | -$9,237 | -1.22% | |
| Prudential Financial Inc | 0.00% | 121,740 | $698,788 | $690,266 | -$8,522 | -1.22% | |
| Inspire Investing, Llc | 0.03% | 119,191 | $684,156 | $675,813 | -$8,343 | -1.22% | |
| Charles Schwab Investment Management Inc | 0.00% | 109,013 | $625,735 | $618,104 | -$7,631 | -1.22% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 109,013 | $625,735 | $618,104 | -$7,631 | -1.22% | |
| Quantinno Capital Management Lp | 0.00% | 106,964 | $613,973 | $606,486 | -$7,487 | -1.22% | |
| Ameriprise Financial Inc | 0.00% | 98,394 | $564,782 | $557,894 | -$6,888 | -1.22% | |
| Jpmorgan Chase & Co | 0.00% | 93,739 | $513,690 | $531,500 | +$17,810 | +3.47% | |
| Invesco Ltd. | 0.00% | 70,075 | $402,230 | $397,325 | -$4,905 | -1.22% | |
| Pinnacle Associates Ltd | 0.00% | 70,000 | $401,800 | $396,900 | -$4,900 | -1.22% | |
| Squarepoint Ops Llc | 0.00% | 66,220 | $380,103 | $375,467 | -$4,636 | -1.22% |
Frequently asked questions about HDSN
Who owns the most HDSN stock?
The largest holders of HDSN are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for HUDSON TECHNOLOGIES INC (HDSN).
Is HDSN widely held by superinvestors?
Many widely followed stocks like HDSN appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly HDSN is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.