HDSN · Hudson Technologies Inc · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Holder Concentration
Across 151 13F filersWho Holds HDSN
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 151 filers, like-for-like change -3.9%; actively managed books -4.3%; index-like books -2.8%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 52.4% | 81 | -8.7% |
| Exempt adviser | 3.8% | 2 | +94.5% |
| Adviser | 0.5% | 2 | -65.2% |
| Bank | 5.5% | 15 | -11.4% |
| Insurer | 0.4% | 1 | 0.0% |
| Benefit plan | 0.3% | 4 | -83.8% |
| Non-US | 0.3% | 5 | -13.3% |
| Holding company | 10.8% | 5 | -4.3% |
| Broker-dealer | 0.0% | 0 | — |
| Unknown | 26.0% | 36 | +12.2% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 26.6% | 20 | -2.8% |
| Systematic-like | 6.9% | 12 | +14.9% |
| Concentrated | 4.6% | 17 | +10.0% |
| Diversified active | 62.0% | 102 | -6.9% |
| Not measured | 0.0% | 0 | — |
| Unknown | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 33.8% | 78 | -14.8% |
| Medium turnover | 22.7% | 39 | -9.0% |
| High turnover | 33.6% | 24 | +12.5% |
| Unknown | 10.0% | 10 | +2.5% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 10.4% | 16 | +0.6% |
| Medium horizon | 36.6% | 25 | +10.6% |
| Long horizon | 45.3% | 98 | -17.6% |
| Unknown | 7.7% | 12 | +35.2% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 31.3% | 27 | +11.6% |
| $1B to $10B | 6.3% | 34 | -45.6% |
| $10B to $100B | 13.0% | 41 | -6.5% |
| $100B or more | 49.3% | 49 | -2.3% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 2.0% | 30 | -24.7% |
| Pooled investment vehicles | 25.5% | 17 | +1.7% |
| Registered funds and BDCs | 19.6% | 14 | -1.0% |
| Pension and profit sharing plans | 0.0% | 1 | -20.9% |
| Insurance companies | 0.1% | 2 | -79.0% |
| Governments and sovereign funds | 0.2% | 1 | +0.3% |
| Corporations | 1.0% | 1 | new |
| Other investment advisers | 0.0% | 1 | -56.0% |
| Other | 0.2% | 2 | +455.3% |
| Diversified | 3.9% | 12 | -57.8% |
| Unknown | 47.6% | 70 | +1.9% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 32.6% | 28 | -4.2% |
| Private equity funds | 0.1% | 2 | +71.3% |
| Venture capital funds | 0.0% | 1 | new |
| Real estate funds | 0.1% | 3 | +3767.4% |
| Securitized asset funds | 0.0% | 1 | 0.0% |
| Other private funds | 9.2% | 11 | -23.2% |
| Mixed private funds | 0.1% | 1 | +10.7% |
| No private funds | 14.0% | 36 | +7.3% |
| Private funds, type not stated | 0.0% | 0 | — |
| Unknown | 43.8% | 68 | -2.1% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 94.3% | 129 | -5.9% |
| Outside the US | 5.7% | 22 | +45.5% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 1 holder with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F.
Conviction and Crowding
151 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 60.9% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shareholder Targets
13F filers that own its peers but not HDSN, quarter ended Jun 30, 2026Found through its holder-overlap peers: KOP, ATKR, BLDR, B, AMZN, GOOGL. 6,672 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | NORGES BANK Non-US, Index-like | $88,927,020,110 3 held | GOOGL, AMZN, BLDR |
| 2 | Capital Research Global Investors Adviser, Diversified active | $68,152,932,554 3 held | GOOGL, AMZN, BLDR |
| 3 | Capital World Investors Adviser, Diversified active | $60,110,031,944 4 held | GOOGL, AMZN, B |
| 4 | Berkshire Hathaway Inc Insurer, Concentrated | $37,764,088,381 1 held | GOOGL |
| 5 | Capital International Investors Adviser, Diversified active | $37,177,975,536 4 held | GOOGL, AMZN, B |
| 6 | WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active | $35,709,292,717 4 held | GOOGL, AMZN, BLDR |
| 7 | Amundi Holding company, Index-like | $34,794,147,275 4 held | GOOGL, AMZN, B |
| 8 | FRANKLIN RESOURCES INC Adviser, Diversified active | $30,542,434,990 6 held | GOOGL, AMZN, B |
| 9 | Fisher Asset Management, LLC Adviser, Diversified active | $23,226,363,623 2 held | GOOGL, AMZN |
| 10 | JENNISON ASSOCIATES LLC Registered adviser, Diversified active | $20,379,147,779 2 held | GOOGL, AMZN |
Fund Ownership of HDSN by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 12.21% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 3.12% | 1,311,866 |
| Index ETFs | 9.09% | 3,827,531 |
| Active ETFs | 2.02% | 850,240 |
| Active funds | 5.47% | 2,302,298 |
| Unclassified | 3.39% | 1,424,710 |
| All registered funds | 23.09% | 9,716,645 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Small Hartree Partners, LP | $25,324,242 | 14.02% | 4,411,889 | Shares | 2026-08-12 | |
| Small WESTERLY CAPITAL MANAGEMENT, LLC Registered adviser | $19,401,200 | 10.74% | 3,380,000 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. Holding company | $16,303,159 | 9.02% | 2,840,272 | Shares | 2026-08-07 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $11,295,824 | 6.25% | 1,967,914 | Shares | 2026-08-11 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $9,495,446 | 5.26% | 1,654,259 | Shares | 2026-08-13 | |
| Large RENAISSANCE TECHNOLOGIES LLC Registered adviser | $8,277,740 | 4.58% | 1,442,115 | Shares | 2026-08-13 | |
| Mega AMERICAN CENTURY COMPANIES INC | $6,712,711 | 3.72% | 1,169,462 | Shares | 2026-08-12 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $5,711,362 | 3.16% | 995,011 | Shares | 2026-08-12 | |
| Mega STATE STREET CORP Bank | $5,141,754 | 2.85% | 895,776 | Shares | 2026-09-22 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP Registered adviser | $4,465,656 | 2.47% | 777,989 | Shares | 2026-08-13 | |
| Small CASPIAN CAPITAL LP Registered adviser | $4,180,476 | 2.31% | 728,306 | Shares | 2026-08-14 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $4,143,401 | 2.29% | 721,847 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $3,296,286 | 1.82% | 574,266 | Shares | 2026-09-02 | |
| Large JACOBS LEVY EQUITY MANAGEMENT, INC Registered adviser | $2,907,832 | 1.61% | 506,591 | Shares | 2026-08-14 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC Registered adviser | $2,838,039 | 1.57% | 494,432 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $2,735,337 | 1.51% | 476,540 | Shares | 2026-08-11 | |
| Mega MARSHALL WACE, LLP Exempt adviser | $2,722,791 | 1.51% | 474,354 | Shares | 2026-08-13 | |
| Mega D. E. Shaw & Co., Inc. | $2,351,052 | 1.30% | 409,591 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY Holding company | $2,107,489 | 1.17% | 367,159 | Shares | 2026-08-13 | |
| Mega Russell Investments Group, Ltd. | $2,080,682 | 1.15% | 362,489 | Shares | 2026-08-06 | |
| Mid 683 Capital Management, LLC Registered adviser | $1,865,500 | 1.03% | 325,000 | Shares | 2026-08-14 | |
| Small JB CAPITAL PARTNERS LP | $1,757,588 | 0.97% | 306,200 | Shares | 2026-08-11 | |
| Mid Ancora Advisors LLC Registered adviser | $1,741,401 | 0.96% | 303,380 | Shares | 2026-08-14 | |
| Small Kerrisdale Advisers, LLC Registered adviser | $1,721,862 | 0.95% | 299,976 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $1,667,682 | 0.92% | 290,537 | Shares | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $1,618,742 | 0.90% | 282,011 | Shares | 2026-08-13 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $1,406,707 | 0.78% | 245,071 | Shares | 2026-08-13 | |
| Large Empowered Funds, LLC Registered adviser | $1,181,739 | 0.65% | 205,878 | Shares | 2026-08-17 | |
| Mega Bank of New York Mellon Corp Bank | $1,175,429 | 0.65% | 204,779 | Shares | 2026-08-06 | |
| Small KESTREL INVESTMENT MANAGEMENT CORP Registered adviser | $1,152,305 | 0.64% | 200,750 | Shares | 2026-08-04 | |
| Large KBC Group NV | $1,068,449 | 0.59% | 207,466 | Shares | 2026-10-22 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $1,014,303 | 0.56% | 176,708 | Shares | 2026-08-14 | |
| Small Pacific Ridge Capital Partners, LLC Registered adviser | $1,001,853 | 0.55% | 174,539 | Shares | 2026-08-12 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $929,321 | 0.51% | 161,903 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $871,383 | 0.48% | 151,809 | Shares | 2026-08-11 | |
| Small MARATHON CAPITAL MANAGEMENT Registered adviser | $866,873 | 0.48% | 168,325 | Shares | 2026-10-23 | |
| Mid Numerai GP LLC Registered adviser | $862,457 | 0.48% | 150,254 | Shares | 2026-08-14 | |
| Large CREDIT AGRICOLE S A | $803,600 | 0.44% | 140,000 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $757,450 | 0.42% | 131,960 | Shares | 2026-08-14 | |
| Small SummerHaven Investment Management, LLC | $730,192 | 0.40% | 141,785 | Shares | 2026-10-19 | |
| Mid WEDGE CAPITAL MANAGEMENT L L P/NC | $705,539 | 0.39% | 136,998 | Shares | 2026-10-13 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $698,787 | 0.39% | 121,740 | Shares | 2026-08-12 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $625,734 | 0.35% | 109,013 | Shares | 2026-08-14 | |
| Large Quantinno Capital Management LP Registered adviser | $613,973 | 0.34% | 106,964 | Shares | 2026-08-13 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $564,781 | 0.31% | 98,394 | Shares | 2026-08-14 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $550,810 | 0.30% | 95,960 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $538,059 | 0.30% | 93,739 | Shares | 2026-08-12 | |
| Mega Invesco Ltd. Adviser | $402,229 | 0.22% | 70,075 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC Registered adviser | $380,102 | 0.21% | 66,220 | Shares | 2026-08-14 | |
| Mid PINNACLE ASSOCIATES LTD Registered adviser | $360,536 | 0.20% | 70,007 | Shares | 2026-10-20 | |
| Mega DEUTSCHE BANK AG\ Non-US | $350,811 | 0.19% | 61,117 | Shares | 2026-08-07 | |
| Mega UBS Group AG Bank | $335,032 | 0.19% | 58,368 | Shares | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $332,380 | 0.18% | 57,906 | Shares | 2026-08-14 | |
| Mid Inspire Advisors, LLC Registered adviser | $311,389 | 0.17% | 54,249 | Shares | 2026-08-13 | |
| Mid ISTHMUS PARTNERS, LLC | $307,140 | 0.17% | 59,639 | Shares | 2026-10-21 | |
| Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Benefit plan | $295,604 | 0.16% | 51,499 | Shares | 2026-08-17 | |
| Small Odyssean, LLC Registered adviser | $290,863 | 0.16% | 50,673 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $287,229 | 0.16% | 50,040 | Shares | 2026-08-12 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $284,290 | 0.16% | 49,528 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $268,115 | 0.15% | 46,710 | Shares | 2026-08-14 | |
| Large Sanctuary Advisors, LLC | $266,014 | 0.15% | 46,344 | Shares | 2026-08-13 | |
| Large EXCHANGE TRADED CONCEPTS, LLC Registered adviser | $264,659 | 0.15% | 46,108 | Shares | 2026-08-11 | |
| Large Point72 Asset Management, L.P. Registered adviser | $262,495 | 0.15% | 45,731 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $258,844 | 0.14% | 45,095 | Shares | 2026-08-14 | |
| Large COMMONWEALTH EQUITY SERVICES, LLC Registered adviser | $243,972 | 0.14% | 42,504 | Shares | 2026-07-29 | |
| Mega CANADA PENSION PLAN INVESTMENT BOARD Non-US | $243,950 | 0.14% | 42,500 | Shares | 2026-08-14 | |
| Small EntryPoint Capital, LLC Registered adviser | $192,066 | 0.11% | 33,461 | Shares | 2026-08-13 | |
| Mid Campbell & CO Investment Adviser LLC Registered adviser | $189,391 | 0.10% | 32,995 | Shares | 2026-08-03 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $188,719 | 0.10% | 32,878 | Shares | 2026-08-14 | |
| Mid Atlantic Union Bankshares Corp Bank | $179,375 | 0.10% | 31,250 | Shares | 2026-08-11 | |
| Large Vident Advisory, LLC Registered adviser | $177,222 | 0.10% | 30,875 | Shares | 2026-08-12 | |
| Mega RAYMOND JAMES FINANCIAL INC | $174,352 | 0.10% | 30,375 | Shares | 2026-08-14 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD Benefit plan | $169,617 | 0.09% | 29,550 | Shares | 2026-08-14 | |
| Large Jump Financial, LLC | $160,392 | 0.09% | 27,943 | Shares | 2026-08-13 | |
| Mid Graham Capital Management, L.P. Registered adviser | $153,464 | 0.08% | 26,736 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $149,240 | 0.08% | 26,000 | Call | 2026-08-14 | |
| Large FIFTH THIRD BANCORP Bank | $141,117 | 0.08% | 24,585 | Shares | 2026-08-05 | |
| Large MetLife Investment Management, LLC Registered adviser | $129,672 | 0.07% | 22,591 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $121,395 | 0.07% | 21,149 | Shares | 2026-08-14 | |
| Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $111,549 | 0.06% | 21,660 | Shares | 2026-10-13 | |
| Small Park Capital Management, LLC / WI Registered adviser | $110,931 | 0.06% | 21,540 | Shares | 2026-10-13 | |
| Mega CITIGROUP INC Bank | $108,387 | 0.06% | 18,883 | Shares | 2026-08-03 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $106,454 | 0.06% | 18,546 | Shares | 2026-08-13 | |
| Mega Boston Partners Registered adviser | $104,588 | 0.06% | 18,221 | Shares | 2026-08-04 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $98,687 | 0.05% | 17,193 | Shares | 2026-08-14 | |
| Small Empirical Asset Management, LLC Registered adviser | $97,918 | 0.05% | 17,059 | Shares | 2026-08-10 | |
| Large EP Wealth Advisors, LLC Registered adviser | $96,862 | 0.05% | 16,875 | Shares | 2026-08-12 | |
| Large OSAIC HOLDINGS, INC. Holding company | $96,483 | 0.05% | 16,809 | Shares | 2026-08-14 | |
| Large Quadrature Capital Ltd | $94,107 | 0.05% | 16,395 | Shares | 2026-08-07 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $92,988 | 0.05% | 16,200 | Put | 2026-08-14 | |
| Large MERCER GLOBAL ADVISORS INC /ADV Registered adviser | $86,564 | 0.05% | 15,081 | Shares | 2026-08-19 | |
| Small Commonwealth Financial Services, LLC Registered adviser | $85,742 | 0.05% | 16,649 | Shares | 2026-10-20 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $85,692 | 0.05% | 14,929 | Shares | 2026-08-13 | |
| Mid HUB Investment Partners, LLC | $85,629 | 0.05% | 14,918 | Shares | 2026-07-31 | |
| Mid Inscription Capital, LLC Registered adviser | $80,543 | 0.04% | 14,032 | Shares | 2026-08-13 | |
| Small State of Wyoming | $77,507 | 0.04% | 13,503 | Shares | 2026-08-06 | |
| Large BROWN BROTHERS HARRIMAN & CO Bank | $76,129 | 0.04% | 13,263 | Shares | 2026-08-12 | |
| Mega FMR LLC Holding company | $74,751 | 0.04% | 13,023 | Shares | 2026-08-13 | |
| Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Benefit plan | $72,151 | 0.04% | 12,570 | Shares | 2026-08-10 | |
| Small 1620 INVESTMENT ADVISORS, INC. Registered adviser | $71,348 | 0.04% | 12,430 | Shares | 2026-07-14 |
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