HUDSON TECHNOLOGIES INC (HDSN) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $187.63M 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 $22.34M in its March 31, 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 $21.39M, representing an estimated loss of -4.25% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 62% 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
156
Total Reported Value
$187.63M
Largest Holder
Hartree Partners, Lp
Largest Position
$22.34M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
187
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Hartree Partners, Lp | 4.85% | 3,800,000 | $22,344,000 | $21,394,000 | -$950,000 | -4.25% | |
| Westerly Capital Management, Llc | 5.75% | 3,175,000 | $18,669,000 | $17,875,250 | -$793,750 | -4.25% | |
| Blackrock, Inc. | 0.00% | 2,862,539 | $16,831,729 | $16,116,095 | -$715,634 | -4.25% | |
| Dimensional Fund Advisors Lp | 0.00% | 2,148,311 | $12,631,109 | $12,094,991 | -$536,118 | -4.24% | |
| Vanguard Capital Management Llc | 0.00% | 1,660,146 | $9,761,658 | $9,346,622 | -$415,036 | -4.25% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 1,504,250 | $8,844,990 | $8,468,928 | -$376,063 | -4.25% |
| American Century Companies Inc | 0.00% | 1,487,774 | $8,748,111 | $8,376,168 | -$371,943 | -4.25% | |
| New South Capital Management Inc | 0.35% | 1,241,223 | $7,298,391 | $6,988,085 | -$310,306 | -4.25% | |
| Geode Capital Management, Llc | 0.00% | 948,546 | $5,578,712 | $5,340,314 | -$238,398 | -4.27% | |
| State Street Corp | 0.00% | 897,873 | $5,279,493 | $5,055,025 | -$224,468 | -4.25% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 881,235 | $5,181,662 | $4,961,353 | -$220,309 | -4.25% | |
| Caspian Capital Lp | 4.17% | 728,306 | $4,282,439 | $4,100,363 | -$182,076 | -4.25% | |
| Bridgeway Capital Management, Llc | 0.06% | 498,109 | $2,928,881 | $2,804,354 | -$124,527 | -4.25% | |
| Morgan Stanley | 0.00% | 471,947 | $2,775,047 | $2,657,062 | -$117,985 | -4.25% | |
| Citadel Advisors Llc | 0.00% | 412,750 | $2,426,970 | $2,323,783 | -$103,188 | -4.25% | |
| Public Employees Retirement System Of Ohio | 0.01% | 410,099 | $2,411,382 | $2,308,857 | -$102,525 | -4.25% | |
| Northern Trust Corp | 0.00% | 399,363 | $2,348,253 | $2,248,414 | -$99,839 | -4.25% | |
| Qube Research & Technologies Ltd | 0.00% | 370,876 | $2,180,751 | $2,088,032 | -$92,719 | -4.25% | |
| D. E. Shaw & Co., Inc. | 0.00% | 358,682 | $2,109,050 | $2,019,380 | -$89,670 | -4.25% | |
| Aqr Capital Management Llc | 0.00% | 344,304 | $2,024,507 | $1,938,432 | -$86,075 | -4.25% | |
| Lazard Asset Management Llc | 0.00% | 325,915 | $1,916,380 | $1,834,901 | -$81,479 | -4.25% | |
| 683 Capital Management, Llc | 0.18% | 325,000 | $1,911,000 | $1,829,750 | -$81,250 | -4.25% | |
| Jb Capital Partners Lp | 0.31% | 306,200 | $1,800,456 | $1,723,906 | -$76,550 | -4.25% | |
| Bank Of New York Mellon Corp | 0.00% | 282,435 | $1,660,717 | $1,590,109 | -$70,608 | -4.25% | |
| Two Sigma Investments, Lp | 0.00% | 272,925 | $1,604,799 | $1,536,568 | -$68,231 | -4.25% | |
| Vanguard Portfolio Management Llc | 0.00% | 268,536 | $1,578,992 | $1,511,858 | -$67,134 | -4.25% | |
| Vanguard Fiduciary Trust Co | 0.00% | 242,866 | $1,428,052 | $1,367,336 | -$60,716 | -4.25% | |
| Marshall Wace, Llp | 0.00% | 219,271 | $1,289,313 | $1,234,496 | -$54,817 | -4.25% | |
| Kestrel Investment Management Corp | 0.70% | 200,750 | $1,180,410 | $1,130,223 | -$50,188 | -4.25% | |
| Goldman Sachs Group Inc | 0.00% | 197,932 | $1,163,840 | $1,114,357 | -$49,483 | -4.25% | |
| Empowered Funds, Llc | 0.01% | 194,555 | $1,143,983 | $1,095,345 | -$48,638 | -4.25% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 178,933 | $1,052,126 | $1,007,393 | -$44,733 | -4.25% | |
| Numerai Gp Llc | 0.10% | 177,292 | $1,042,477 | $998,154 | -$44,323 | -4.25% | |
| Marathon Capital Management | 0.23% | 174,325 | $1,025,031 | $981,450 | -$43,581 | -4.25% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 170,825 | $1,004,451 | $961,745 | -$42,706 | -4.25% | |
| Grimes & Co Wealth Management, Llc | 0.03% | 158,618 | $932,674 | $893,019 | -$39,655 | -4.25% | |
| Russell Investments Group, Ltd. | 0.00% | 154,393 | $907,830 | $869,233 | -$38,597 | -4.25% | |
| Pacific Ridge Capital Partners, Llc | 0.19% | 146,930 | $863,948 | $827,216 | -$36,732 | -4.25% | |
| First Trust Advisors Lp | 0.00% | 145,083 | $853,088 | $816,817 | -$36,271 | -4.25% | |
| Wedge Capital Management L L P/Nc | 0.02% | 144,736 | $851,048 | $814,864 | -$36,184 | -4.25% | |
| Credit Agricole S A | 0.00% | 140,000 | $823,200 | $788,200 | -$35,000 | -4.25% | |
| Prudential Financial Inc | 0.00% | 121,740 | $715,831 | $685,396 | -$30,435 | -4.25% | |
| Bank Of America Corp | 0.00% | 102,335 | $601,730 | $576,146 | -$25,584 | -4.25% | |
| Charles Schwab Investment Management Inc | 0.00% | 101,977 | $599,625 | $574,131 | -$25,494 | -4.25% | |
| Jump Financial, Llc | 0.01% | 90,600 | $532,728 | $510,078 | -$22,650 | -4.25% | |
| Edgerock Capital Llc | 0.14% | 90,517 | $532,240 | $509,611 | -$22,629 | -4.25% | |
| Inspire Investing, Llc | 0.04% | 88,086 | $517,946 | $495,924 | -$22,022 | -4.25% | |
| Nuveen, Llc | 0.00% | 83,715 | $492,244 | $471,315 | -$20,929 | -4.25% | |
| Mackenzie Financial Corp | 0.00% | 82,339 | $484,153 | $463,569 | -$20,584 | -4.25% | |
| State Of Wisconsin Investment Board | 0.00% | 80,690 | $474,457 | $454,285 | -$20,172 | -4.25% |
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.