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Disclosery

HDSN HUDSON TECHNOLOGIES INC

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COMMON STOCK (common), issuer CIK 925528

164 managers (168 13F filers) reported a position in HDSN shares at 2025-12-31, 32,978,644 shares in all. 23 filers opened a position and 25 filers sold out during the quarter.

Managers
164
13F filers
168
New
23
Added
43
Reduced
68
Sold out
25
Shares held by filers
32,978,644

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Hartree Partners, LP3,800,000$26M9.51%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.2,913,869$20M<0.01%+50,59613F-HRTimelineGroup
WESTERLY CAPITAL MANAGEMENT, LLC2,550,000$17.5M5.25%+660,00013F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC2,338,710$16M<0.01%-34,47113F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,043,151$14M<0.01%+33,67013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC1,697,250$11.6M0.02%-99,60013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC1,386,683$9.5M<0.01%+112,79313F-HRTimelineGroup
NEW SOUTH CAPITAL MANAGEMENT INC1,283,528$8.79M0.4%-50,80913F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …982,819$6.73M<0.01%-128,98413F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC943,154$6.46M<0.01%-11,27213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP894,064$6.12M<0.01%+20913F-HRTimelineGroup
CASPIAN CAPITAL LP728,306$4.99M3.3%13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY705,577$4.83M<0.01%-87,15013F-HR/ATimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.582,780$3.99M<0.01%-239,02913F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP465,130$3.19M<0.01%+339,54313F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC431,769$2.96M0.01%+170,96413F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…410,099$2.81M0.01%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP391,889$2.68M<0.01%-24,61813F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC378,255$2.59M0.05%+17,60713F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC339,352$2.32M<0.01%-5,93213F-HRTimelineGroup
683 Capital Management, LLCin group 683 Capital Management, LLC335,000$2.29M0.19%-15,00013F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp325,707$2.23M<0.01%-12,68313F-HRTimelineGroup
JB CAPITAL PARTNERS LP306,200$2.1M0.36%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding302,700$2.07M-115,221Timeline
LOS ANGELES CAPITAL MANAGEMENT LLC221,182$2.03M0.01%-10,01013F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC220,612$1.51M<0.01%+8,66713F-HRTimelineGroup
KESTREL INVESTMENT MANAGEMENT CORP201,750$1.38M0.78%-7,10013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC189,896$1.3M<0.01%+25,43613F-HR/ATimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC189,061$1.3M<0.01%-166,89713F-HRTimelineGroup
SEGALL BRYANT & HAMILL, LLC180,354$1.24M0.02%new13F-HRTimeline
MARATHON CAPITAL MANAGEMENT175,325$1.2M0.26%-19,12513F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC170,826$1.17M0.01%-5,06213F-HRTimeline
Qube Research & Technologies Ltd163,703$1.12M<0.01%+75,00713F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC159,728$1.09M<0.01%-63,21713F-HRTimeline
WEDGE CAPITAL MANAGEMENT L L P/NC153,364$1.05M0.02%-1,70413F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP141,978$973K<0.01%+4,17113F-HRTimelineGroup
CREDIT AGRICOLE S Ain group CREDIT AGRICOLE S A140,000$959K<0.01%new13F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…138,687$950K<0.01%-10,97213F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding137,895$945K+4,075Timeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO127,571$874K<0.01%-15,32713F-HRTimelineGroup
KBC Group NVin group KBC Group NV123,001$843K<0.01%new13F-HRTimelineGroup
Quantinno Capital Management LP121,947$835K<0.01%+66,61213F-HRTimeline
Pacific Ridge Capital Partners, LLC118,406$811K0.18%+14,82613F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co115,316$790K<0.01%+42413F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.113,263$776K<0.01%+108,96313F-HRTimelineGroup
Franklin Resourcesgroup of 2 filers holding100,122$686K-4,939Timeline
STATE OF WISCONSIN INVESTMENT BOARD99,764$683K<0.01%+26,93713F-HRTimeline
Invesco Ltd.in group Invesco Ltd.97,108$665K<0.01%+18,32413F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC91,216$625K<0.01%-51,30513F-HRTimelineGroup
EdgeRock Capital LLC90,517$620K0.16%+5,22013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/83,404$571K<0.01%-195,76813F-HRTimelineGroup
Inspire Investing, LLCgroup of 2 filers holding83,279$570K+36,856Timeline
Nuveen, LLCin group TIAA83,140$570K<0.01%013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC80,083$549K<0.01%-34,30313F-HRTimelineGroup
STRS OHIO77,100$528K<0.01%+17,50013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/73,706$505K<0.01%013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC71,167$487K<0.01%+2,29213F-HRTimelineGroup
PINNACLE ASSOCIATES LTD70,000$480K0.01%013F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC69,970$479K<0.01%new13F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC67,991$466K<0.01%+7,44313F-HRTimelineGroup
AVIVA PLCin group AVIVA PLC67,703$464K<0.01%+20,17813F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC61,273$420K<0.01%+1,06613F-HRTimelineGroup
Trexquant Investment LP59,580$408K<0.01%-151,32513F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC59,073$405K<0.01%+18,24013F-HRTimelineGroup
Kerrisdale Advisers, LLC57,622$395K0.19%-6,47813F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\53,225$365K<0.01%-9,27413F-HRTimelineGroup
Campbell & CO Investment Adviser LLC52,762$361K0.02%+3,54413F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD51,500$353K<0.01%new13F-HRTimeline
RHUMBLINE ADVISERS51,307$351K<0.01%-10,10213F-HRTimeline
ZAZOVE ASSOCIATES LLC50,000$342K0.03%013F-HRTimeline
State of Wyoming48,062$329K0.04%+8,01513F-HRTimeline
ISTHMUS PARTNERS, LLC47,664$326K0.04%-85213F-HRTimeline
Hillsdale Investment Management Inc.44,000$301K0.01%+13,00013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN43,900$301K<0.01%+14,39213F-HRTimelineGroup
ALGERT GLOBAL LLC43,105$295K<0.01%+19,34013F-HR/ATimeline
ALLIANCEBERNSTEIN L.P.42,210$289K<0.01%013F-HRTimeline
GRIMES & Co WEALTH MANAGEMENT, LLC41,163$282K0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…40,968$281K<0.01%new13F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC39,609$271K<0.01%-2,33013F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC38,650$265K<0.01%-1,86813F-HRTimeline
SEIZERT CAPITAL PARTNERS, LLC38,023$260K0.01%013F-HRTimeline
Graham Capital Management, L.P.36,985$253K0.01%+3,25613F-HRTimeline
Sterling Capital Management LLC36,978$253K<0.01%-43713F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC35,366$242K<0.01%+7,37613F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC34,137$234K<0.01%new13F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd33,098$227K0.01%-31,38813F-HRTimelineGroup
COMERICA BANK31,614$217K<0.01%013F-HRTimeline
MARTINGALE ASSET MANAGEMENT L P31,238$214K0.01%-30713F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC31,200$214K0.02%new13F-HRTimeline
TUDOR INVESTMENT CORP ET AL29,237$200K<0.01%-178,01213F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd29,131$200K0.01%+14,89813F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…27,278$187K<0.01%013F-HRTimelineGroup
Aristides Capital LLC26,720$183K0.06%-2,15713F-HR/ATimeline
Integrated Advisors Network LLC25,281$173K0.01%-3,82513F-HRTimeline
IEQ CAPITAL, LLC24,012$164K<0.01%-6,77113F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.22,882$157K<0.01%-3,35013F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp21,256$146K<0.01%-2,62013F-HRTimelineGroup
EP Wealth Advisors, LLC20,417$140K<0.01%13F-HRTimeline
SHERBROOKE PARK ADVISERS LLC19,369$133K0.34%new13F-HRTimeline
SG Americas Securities, LLC19,132$131K<0.01%+7,55713F-HRTimeline
Legato Capital Management LLC18,479$127K0.01%013F-HRTimeline
Janney Montgomery Scott LLC18,022$123K<0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…17,859$122K<0.01%-42413F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…16,407$112K<0.01%+12413F-HRTimelineGroup
Truvestments Capital LLC15,011$103K0.02%-12313F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC14,602$100K<0.01%-4,61113F-HRTimeline
MANGROVE PARTNERS IM, LLC14,058$96.3K0.01%new13F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…13,653$93.5K<0.01%+1,08313F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO13,263$90.9K<0.01%013F-HRTimelineGroup
Cardinal Point Capital Management ULC12,850$88K0.01%013F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…12,454$86.9K<0.01%-29313F-HRTimeline
AXQ CAPITAL, LP12,433$85.2K0.02%new13F-HRTimeline
CWM, LLCin group CWM, LLC12,080$83K<0.01%-2,02213F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …12,110$83K<0.01%-1,09313F-HRTimelineGroup
Prime Capital Investment Advisors, LLC11,794$80.8K<0.01%new13F-HRTimeline
1620 INVESTMENT ADVISORS, INC.11,245$77K0.05%-24113F-HRTimeline
Police & Firemen's Retirement System of…10,817$74.1K<0.01%013F-HRTimeline
Kemnay Advisory Services Inc.9,124$62.5K0.01%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS8,757$60K<0.01%+1,22713F-HRTimelineGroup
Versant Capital Management, Inc8,303$56.9K0.01%+8213F-HRTimeline
GAMMA Investing LLC6,684$45.8K<0.01%+19713F-HRTimeline
FMR LLCin group FMR LLC6,413$43.9K<0.01%+1,45713F-HRTimelineGroup
AlphaQuest LLC5,550$38K<0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND5,270$36.1K<0.01%013F-HRTimeline
State of Alaska, Department of Revenue4,145$28K<0.01%new13F-HRTimeline
North Star Investment Management Corp.4,075$27.9K<0.01%-166,00013F-HRTimeline
Steward Partners Investment Advisory, L…4,000$27.4K<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC3,705$25.4K<0.01%-4513F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc3,555$24.4K<0.01%013F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…3,518$24K<0.01%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,215$22K<0.01%013F-HRTimelineGroup
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.2,565$17.6K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,368$16.2K<0.01%-5613F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,504$10K<0.01%-801,36813F-HRTimelineGroup
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/1,260$8.63K<0.01%+2913F-HRTimelineGroup
AMALGAMATED BANK1,209$8K<0.01%-28813F-HRTimeline
SIMPLEX TRADING, LLC1,160$7.95K<0.01%-14,70713F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,061$7.27K<0.01%-1,12113F-HRTimelineGroup
BARD ASSOCIATES INC1,000$6.85K<0.01%new13F-HRTimeline
True Wealth Design, LLC991$6.79K<0.01%-5613F-HRTimeline
NISA INVESTMENT ADVISORS, LLC977$6.69K<0.01%013F-HRTimeline
Covestor Ltd935$6K<0.01%-6613F-HRTimeline
Essential Partners LLC717$4.91K<0.01%-15713F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…589$4.04K<0.01%-17513F-HRTimelineGroup
HARBOR CAPITAL ADVISORS, INC.647$4K<0.01%-1113F-HRTimeline
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…500$3.42K<0.01%013F-HR/ATimelineGroup
FINANCIAL CONSULATE, INC500$3.42K<0.01%new13F-HRTimeline
Private Wealth Management Group, LLC406$2.78K<0.01%013F-HRTimeline
C M BIDWELL & ASSOCIATES LTD400$2.74K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.350$2.4K<0.01%013F-HRTimelineGroup
Red Tortoise LLC328$2.25K<0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…158$1.08K<0.01%new13F-HR/ATimelineGroup
Stephens Consulting, LLC126$864<0.01%013F-HRTimeline
Arax Advisory Partners77$528<0.01%-3,19613F-HRTimeline
Hilton Head Capital Partners, LLC50$342<0.01%13F-HRTimeline
Farther Finance Advisors, LLC47$322<0.01%-45813F-HRTimeline
Sunbelt Securities, Inc.27$185<0.01%013F-HRTimeline
IFP Advisors, Inc23$158<0.01%-413F-HRTimeline
Allworth Financial LP14$96<0.01%-9913F-HRTimeline
SBI Securities Co., Ltd.12$82<0.01%-113F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…3$21<0.01%-1113F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC1$7<0.01%new13F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1$7<0.01%-13113F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC33$00%013F-HRTimelineGroupValue filed as zero, left out of ratios.