Hudson Technologies Inc. 13F holders
151 funds reported a position in Hudson Technologies Inc. in their 13F for the quarter ended 30 June 2026, together 31.6 million shares worth $181.4 million. Against the quarter before, 23 opened a position, 46 added, 51 trimmed and 30 sold out; together they sold a net 1.4 million shares. The largest holders: Hartree Partners, LP, Westerly Capital Management, LLC and BlackRock, Inc.
Funds holding151-9 on Q1 2026
Shares they held31.6Mworth $181.4 million
Net sold on the quarter1.4M sharesabout $7.9 million at the funds' values
Funds buying to selling69 to 81opened or added, to cut or sold
Opened 23Added 46Held 30Trimmed 51Sold out 30
What each fund did in HDSN against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in HDSN in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,405 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 26 reported a position in Hudson Technologies Inc.: 2 opened one, 9 added, 8 trimmed and 7 sold out, a net 86,893 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 6 reported a position in Hudson Technologies Inc. in a 13F for the quarter ended 30 June 2026. The largest: Renaissance Technologies, 1.4 million shares worth $8.3 million, 0.0% of its reported book. New this quarter: Point72 Asset Management. Sold out: Millennium Management. In the quarter, 3 funds added or opened a position and 4 trimmed or sold out; together they sold a net 25,244 shares, about $144,901 at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Renaissance Technologies | 1,442,115 | $8.3 million | 0.0% | -62,135 | trimmed | 30 June 2026 | 13F |
| Geode Capital Management | 995,011 | $5.7 million | 0.0% | +46,465 | added | 30 June 2026 | 13F |
| Citadel Advisors | 574,266 | $3.3 million | 0.0% | +161,516 | added | 30 June 2026 | 13F |
| Two Sigma Investments | 131,960 | $757,450 | 0.0% | -140,965 | trimmed | 30 June 2026 | 13F |
| Point72 Asset Management | 45,731 | $262,496 | 0.0% | +45,731 | new | 30 June 2026 | 13F |
| FMR LLC | 13,023 | $74,753 | 0.0% | -3,173 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 0 | $0 | 0.0% | -72,683 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Hartree Partners, LP | 4,411,889 | 13.96% | $25.3 million | 5.45% | +611,889 | 13F |
| Westerly Capital Management, LLC | 3,380,000 | 10.69% | $19.4 million | 3.58% | +205,000 | 13F |
| BlackRock, Inc. | 2,840,272 | 8.99% | $16.3 million | 0.00% | -22,267 | 13F |
| Dimensional Fund Advisors LP | 1,967,914 | 6.23% | $11.3 million | 0.00% | -180,397 | 13F |
| Vanguard Capital Management LLC | 1,654,259 | 5.23% | $9.5 million | 0.00% | -5,887 | 13F |
| Renaissance Technologies LLC | 1,442,115 | 4.56% | $8.3 million | 0.01% | -62,135 | 13F |
| American Century Companies Inc. | 1,169,462 | 3.70% | $6.7 million | 0.00% | -318,312 | 13F |
| Geode Capital Management, LLC | 995,011 | 3.15% | $5.7 million | 0.00% | +46,465 | 13F |
| State Street Corp. | 895,776 | 2.83% | $5.1 million | 0.00% | -2,097 | 13F |
| Arrowstreet Capital, Limited Partnership | 777,989 | 2.46% | $4.5 million | 0.00% | -103,246 | 13F |
| Caspian Capital LP | 728,306 | 2.30% | $4.2 million | 2.37% | no change | 13F |
| Qube Research & Technologies Ltd | 721,847 | 2.28% | $4.1 million | 0.01% | +350,971 | 13F |
| Citadel Advisors LLC | 574,266 | 1.82% | $3.3 million | 0.00% | +161,516 | 13F |
| Jacobs Levy Equity Management, Inc. | 506,591 | 1.60% | $2.9 million | 0.01% | +327,658 | 13F |
| Bridgeway Capital Management, LLC | 494,432 | 1.56% | $2.8 million | 0.05% | -3,677 | 13F |
| Nuveen, LLC | 476,540 | 1.51% | $2.7 million | 0.00% | +392,825 | 13F |
| Marshall Wace, LLP | 474,354 | 1.50% | $2.7 million | 0.00% | +255,083 | 13F |
| D. E. Shaw & Co., Inc. | 409,591 | 1.30% | $2.4 million | 0.00% | +50,909 | 13F |
| Morgan Stanley | 367,159 | 1.16% | $2.1 million | 0.00% | -104,788 | 13F |
| Russell Investments Group, Ltd. | 362,489 | 1.15% | $2.1 million | 0.00% | +208,096 | 13F |
| 683 Capital Management, LLC | 325,000 | 1.03% | $1.9 million | 0.18% | no change | 13F |
| JB Capital Partners LP | 306,200 | 0.97% | $1.8 million | 0.27% | no change | 13F |
| Ancora Advisors LLC | 303,380 | 0.96% | $1.7 million | 0.03% | new | 13F |
| Kerrisdale Advisers, LLC | 299,976 | 0.95% | $1.7 million | 0.43% | +242,354 | 13F |
| Vanguard Portfolio Management LLC | 290,537 | 0.92% | $1.7 million | 0.00% | +22,001 | 13F |
| Northern Trust Corp. | 282,011 | 0.89% | $1.6 million | 0.00% | -117,352 | 13F |
| Vanguard Fiduciary Trust Co. | 245,071 | 0.78% | $1.4 million | 0.00% | +2,205 | 13F |
| KBC Group NV | 207,466 | 0.66% | $1.2 million | 0.00% | +84,465 | 13F |
| Empowered Funds, LLC | 205,878 | 0.65% | $1.2 million | 0.01% | +11,323 | 13F |
| Bank of New York Mellon Corp | 204,779 | 0.65% | $1.2 million | 0.00% | -77,656 | 13F |
| Kestrel Investment Management Corp. | 200,750 | 0.64% | $1.2 million | 0.63% | no change | 13F |
| Goldman Sachs Group Inc. | 176,708 | 0.56% | $1.0 million | 0.00% | -21,224 | 13F |
| Pacific Ridge Capital Partners, LLC | 174,539 | 0.55% | $1.0 million | 0.18% | +27,609 | 13F |
| Marathon Capital Management | 173,325 | 0.55% | $994,886 | 0.20% | -1,000 | 13F |
| AQR Capital Management LLC | 161,903 | 0.51% | $929,324 | 0.00% | -182,401 | 13F |
| First Trust Advisors LP | 151,809 | 0.48% | $871,383 | 0.00% | +6,726 | 13F |
| Numerai GP LLC | 150,254 | 0.48% | $862,458 | 0.07% | -27,038 | 13F |
| Credit Agricole S A | 140,000 | 0.44% | $803,600 | 0.00% | no change | 13F |
| Wedge Capital Management L L P | 137,618 | 0.44% | $789,927 | 0.01% | -7,118 | 13F |
| Two Sigma Investments, LP | 131,960 | 0.42% | $757,450 | 0.00% | -140,965 | 13F |
| Prudential Financial Inc. | 121,740 | 0.39% | $698,788 | 0.00% | no change | 13F |
| Inspire Investing, LLC | 119,191 | 0.38% | $684,156 | 0.03% | +31,105 | 13F |
| Charles Schwab Investment Management Inc. | 109,013 | 0.34% | $625,735 | 0.00% | +7,036 | 13F |
| Quantinno Capital Management LP | 106,964 | 0.34% | $613,973 | 0.00% | +30,696 | 13F |
| Ameriprise Financial Inc. | 98,394 | 0.31% | $564,782 | 0.00% | +41,307 | 13F |
| Price T Rowe Associates Inc. | 95,960 | 0.30% | $551,000 | 0.00% | +15,947 | 13F |
| JPMorgan Chase & Co. | 93,739 | 0.30% | $513,690 | 0.00% | -23,800 | 13F |
| Invesco Ltd. | 70,075 | 0.22% | $402,230 | 0.00% | -8,711 | 13F |
| Pinnacle Associates Ltd | 70,000 | 0.22% | $401,800 | 0.00% | no change | 13F |
| Squarepoint Ops LLC | 66,220 | 0.21% | $380,103 | 0.00% | +40,202 | 13F |
The 50 largest of the 151 funds that reported a position in HDSN in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 July 2026 | 13G/A | Dimensional Fund Advisors LP and 1 other | 2.0 million | 4.7% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 2 July 2026 | 13G/A | Hartree Partners, LP and 1 other | 5.0 million | 11.8% | 30 June 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 5 June 2026 | 13G | Hartree Partners, LP and 1 other | 3.8 million | 9.0% | 5 June 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 9 April 2026 | 13G | Dimensional Fund Advisors LP and 1 other | 2.1 million | 5.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 17 February 2026 | 13G/A | Westerly Capital Management, LLC and 1 other | n/a | 5.9% | 31 December 2025 | passive, under 20% (13d-1(c)) | EDGAR |
| 10 December 2025 | 13D | Hartree Partners, LP | 3.8 million | 8.7% | 8 December 2025 | The Reporting Person acquired the Shares for investment purposes based on its belief that the Shares, when purchased, were undervalued and represented an attractive investment opportunity. The Reporting Person intends to review its investme | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 18 August 2026 | 7,283 | $6.15 | SEC |
| 14 August 2026 | 22 | $5.67 | SEC |
| 12 August 2026 | 8 | $5.53 | SEC |
| 21 July 2026 | 787 | $6.11 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.