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Disclosery

HDSN HUDSON TECHNOLOGIES INC

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COMMON STOCK (common), issuer CIK 925528

155 managers (160 13F filers) reported a position in HDSN shares at 2026-03-31, 32,926,049 shares in all. 22 filers opened a position and 29 filers sold out during the quarter.

Managers
155
13F filers
160
New
22
Added
47
Reduced
58
Sold out
29
Shares held by filers
32,926,049

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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$22.3M4.84%013F-HRTimeline
WESTERLY CAPITAL MANAGEMENT, LLC3,175,000$18.7M5.75%+625,00013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.2,862,539$16.8M<0.01%-51,33013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding2,186,477$12.9MnewTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,148,311$12.6M<0.01%+105,16013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC1,504,250$8.84M0.01%-193,00013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC1,487,774$8.75M<0.01%+101,09113F-HRTimelineGroup
NEW SOUTH CAPITAL MANAGEMENT INC1,241,223$7.3M0.35%-42,30513F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC948,546$5.58M<0.01%+5,39213F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP897,873$5.28M<0.01%+3,80913F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …881,235$5.18M<0.01%-101,58413F-HRTimelineGroup
CASPIAN CAPITAL LP728,306$4.28M4.17%013F-HRTimeline
SEGALL BRYANT & HAMILL, LLC628,341$3.69M0.05%+447,98713F-HR/ATimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC498,109$2.93M0.06%+119,85413F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY471,947$2.78M<0.01%-233,63013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC412,750$2.43M<0.01%+332,66713F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…410,099$2.41M0.01%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP399,363$2.35M<0.01%+7,47413F-HRTimelineGroup
Qube Research & Technologies Ltd370,876$2.18M<0.01%+207,17313F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.358,682$2.11M<0.01%-224,09813F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC344,304$2.02M<0.01%+4,95213F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC325,915$1.92M<0.01%-105,85413F-HRTimelineGroup
683 Capital Management, LLCin group 683 Capital Management, LLC325,000$1.91M0.18%-10,00013F-HRTimelineGroup
JB CAPITAL PARTNERS LP306,200$1.8M0.31%013F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp282,435$1.66M<0.01%-43,27213F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP272,925$1.6M<0.01%+137,52513F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP219,271$1.29M<0.01%-245,85913F-HRTimelineGroup
KESTREL INVESTMENT MANAGEMENT CORP200,750$1.18M0.7%-1,00013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC197,932$1.16M<0.01%+8,03613F-HRTimelineGroup
Empowered Funds, LLC194,555$1.14M0.01%new13F-HR/ATimeline
JACOBS LEVY EQUITY MANAGEMENT, INC178,933$1.05M<0.01%+19,20513F-HRTimeline
Numerai GP LLC177,292$1.04M0.1%new13F-HRTimeline
MARATHON CAPITAL MANAGEMENT174,325$1.03M0.23%-1,00013F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC170,825$1M0.01%-113F-HRTimeline
GRIMES & Co WEALTH MANAGEMENT, LLC158,618$933K0.03%+117,45513F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…154,393$908K<0.01%+15,70613F-HRTimelineGroup
Pacific Ridge Capital Partners, LLC146,930$864K0.19%+28,52413F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP145,083$853K<0.01%+3,10513F-HRTimelineGroup
WEDGE CAPITAL MANAGEMENT L L P/NC144,736$851K0.02%-8,62813F-HRTimeline
CREDIT AGRICOLE S Ain group CREDIT AGRICOLE S A140,000$823K<0.01%013F-HRTimelineGroup
Inspire Investing, LLCgroup of 2 filers holding124,492$732K+41,213Timeline
KBC Group NVin group KBC Group NV123,001$723K<0.01%013F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC121,740$716K<0.01%+51,77013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO117,539$672K<0.01%-10,03213F-HR/ATimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/102,335$602K<0.01%+18,93113F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co101,977$600K<0.01%-13,33913F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC90,600$533K0.01%new13F-HRTimelineGroup
EdgeRock Capital LLC90,517$532K0.14%013F-HRTimeline
Nuveen, LLCin group TIAA83,715$492K<0.01%+57513F-HRTimelineGroup
MACKENZIE FINANCIAL CORP82,339$484K<0.01%new13F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD80,690$474K<0.01%-19,07413F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/80,013$471K<0.01%+6,30713F-HRTimeline
Invesco Ltd.in group Invesco Ltd.78,786$463K<0.01%-18,32213F-HRTimelineGroup
STRS OHIO77,100$453K<0.01%013F-HRTimeline
Quantinno Capital Management LP76,268$448K<0.01%-45,67913F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC72,683$427K<0.01%-116,37813F-HRTimelineGroup
PINNACLE ASSOCIATES LTD70,000$412K0.01%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC69,854$411K<0.01%-21,36213F-HRTimelineGroup
Campbell & CO Investment Adviser LLC61,443$361K0.02%+8,68113F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC60,855$358K<0.01%-41813F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd58,528$344K0.01%+25,43013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\58,277$343K<0.01%+5,05213F-HRTimelineGroup
Kerrisdale Advisers, LLC57,622$339K0.13%013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC57,087$336K<0.01%-14,08013F-HR/ATimelineGroup
ZAZOVE ASSOCIATES LLC50,000$294K0.03%013F-HR/ATimeline
RHUMBLINE ADVISERS49,899$293K<0.01%-1,40813F-HRTimeline
ALLIANCEBERNSTEIN L.P.42,210$289K<0.01%013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD48,000$282K<0.01%-3,50013F-HRTimeline
UBS Group AGgroup of 2 filers holding46,105$271K-91,790Timeline
ISTHMUS PARTNERS, LLC43,397$255K0.03%-4,26713F-HRTimeline
Schonfeld Strategic Advisors LLC42,716$251K<0.01%new13F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC42,699$251K<0.01%+3,09013F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp39,994$235K<0.01%+18,73813F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC39,507$232K<0.01%+4,14113F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC38,647$227K<0.01%-313F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.39,373$225K0.04%new13F-HRTimeline
Graham Capital Management, L.P.36,033$212K0.01%-95213F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…34,154$201K<0.01%-6,81413F-HRTimelineGroup
Atlantic Union Bankshares Corpin group Atlantic Union Bankshares Corp31,250$184K<0.01%new13F-HRTimelineGroup
ExodusPoint Capital Management, LP31,125$183K<0.01%new13F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC30,875$182K<0.01%new13F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…30,396$179K<0.01%new13F-HRTimelineGroup
State of Wyoming29,097$171K0.02%-18,96513F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC26,018$153K<0.01%-8,11913F-HRTimelineGroup
MIRABELLA FINANCIAL SERVICES LLP24,735$145K0.01%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources22,600$133K<0.01%-54,92213F-HRTimelineGroup
EP Wealth Advisors, LLC20,974$123K<0.01%+55713F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd20,699$122K<0.01%new13F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.19,062$112K<0.01%-3,82013F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…18,301$108K<0.01%+44213F-HRTimelineGroup
Brooklyn Investment Group16,485$96.9K<0.01%new13F-HRTimeline
FMR LLCin group FMR LLC16,196$95.2K<0.01%+9,78313F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN15,955$93.8K<0.01%-27,94513F-HR/ATimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…15,990$93.4K<0.01%+3,53613F-HRTimeline
Aquatic Capital Management LLC14,935$87.8K<0.01%new13F-HRTimeline
TUDOR INVESTMENT CORP ET AL14,790$87K<0.01%-14,44713F-HRTimeline
Sequoia Financial Advisors, LLC14,000$82.3K<0.01%new13F-HRTimeline
Centiva Capital, LP13,529$79.6K<0.01%new13F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO13,263$78K<0.01%013F-HRTimelineGroup
Cardinal Point Capital Management ULC12,850$75.6K<0.01%013F-HRTimeline
Prime Capital Investment Advisors, LLC12,596$74.1K<0.01%+80213F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…12,570$73.9K<0.01%-1,08313F-HRTimeline
Truvestments Capital LLC11,973$70.4K0.01%-3,03813F-HRTimeline
1620 INVESTMENT ADVISORS, INC.11,385$66.9K0.05%+14013F-HRTimeline
CWM, LLCin group CWM, LLC11,249$66.1K<0.01%-83113F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…11,129$65K<0.01%-16,14913F-HRTimelineGroup
Police & Firemen's Retirement System of…10,817$63.6K<0.01%013F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …10,658$62.7K<0.01%-1,45213F-HRTimelineGroup
MANGROVE PARTNERS IM, LLC10,401$61.2K<0.01%-3,65713F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC10,290$60.5K<0.01%-4,31213F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…8,554$50.3K<0.01%-7,85313F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS8,270$48.6K<0.01%-48713F-HRTimelineGroup
Versant Capital Management, Inc7,370$43.3K<0.01%-93313F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC6,987$41.1K<0.01%-61,00413F-HRTimelineGroup
STANCE CAPITAL LLC6,560$38.6K0.02%new13F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP5,551$32K<0.01%+5,55013F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND5,270$31K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,531$26.6K<0.01%+3,47013F-HRTimelineGroup
State of Alaska, Department of Revenue4,145$24K<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…4,000$23.5K<0.01%013F-HRTimeline
GAMMA Investing LLC3,591$21.1K<0.01%-3,09313F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…3,518$21K<0.01%013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc3,555$20.9K<0.01%013F-HRTimelineGroup
LSV ASSET MANAGEMENT3,400$20K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…3,215$18.9K<0.01%013F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,083$12.2K<0.01%-28513F-HRTimeline
CITIGROUP INCin group CITIGROUP INC1,787$10.5K<0.01%-1,91813F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,677$10K<0.01%+17313F-HRTimelineGroup
Sterling Capital Management LLC1,274$7.49K<0.01%-35,70413F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/1,260$7.4K<0.01%013F-HRTimelineGroup
Covestor Ltd1,145$7K<0.01%+21013F-HRTimeline
BARD ASSOCIATES INC1,000$5.88K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC977$5.75K<0.01%013F-HRTimeline
Parallel Advisors, LLC935$5.5K<0.01%new13F-HR/ATimeline
SIMPLEX TRADING, LLC886$5.21K<0.01%-27413F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.783$5K<0.01%+13613F-HRTimeline
True Wealth Design, LLC823$4.84K<0.01%-16813F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…783$4.6K<0.01%+62513F-HRTimelineGroup
Essential Partners LLC697$4.1K<0.01%-2013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…554$3.26K<0.01%-3513F-HR/ATimelineGroup
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…500$2.94K<0.01%013F-HRTimelineGroup
FINANCIAL CONSULATE, INC500$2.94K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.382$2.25K<0.01%+3213F-HR/ATimelineGroup
Red Tortoise LLC328$1.93K<0.01%013F-HRTimeline
Private Wealth Management Group, LLC299$1.76K<0.01%-10713F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…83$488<0.01%+8013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\56$329<0.01%new13F-HRTimelineGroup
Hilton Head Capital Partners, LLC50$294<0.01%013F-HRTimeline
Allworth Financial LP43$253<0.01%+2913F-HRTimeline
Farther Finance Advisors, LLC40$232<0.01%-713F-HRTimeline
Sunbelt Securities, Inc.31$182<0.01%+413F-HRTimeline
Kilter Group LLC20$118<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.12$71<0.01%013F-HRTimeline
Arax Advisory Partners10$59<0.01%-6713F-HRTimeline
Caitong International Asset Management …3$18<0.01%new13F-HRTimeline