HUDSON TECHNOLOGIES INC (HDSN) Institutional Ownership Changes & 13F Activity

HUDSON TECHNOLOGIES INC (HDSN) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC, Sequoia Financial Advisors, and Oaktree Capital Management.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2021Renaissance Technologies LLCBuy165,000501,850$1,772
Q2 2021Renaissance Technologies LLCBuy30,901336,850$1,145
Q1 2021Renaissance Technologies LLCBuy286,049305,949$493
Q4 2020Renaissance Technologies LLCSell-243,50019,900$22
Q4 2016Renaissance Technologies LLCBuy165,100263,400$2,110
Q3 2016Renaissance Technologies LLCBuy64,00098,300$654
Q4 2014Renaissance Technologies LLCSell-56,10034,300$129
Q2 2013Renaissance Technologies LLCBuy90,40090,400$288

Frequently asked questions about HDSN activity

  • Which institutional owners are buying HDSN?

    Institutional owners buying HDSN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in HDSN activity?

    "Buy" means an investor increased their reported position in HDSN compared to the prior reporting period. This reflects growing exposure to HUDSON TECHNOLOGIES INC (HDSN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in HDSN increasing?

    Institutional interest in HDSN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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