Hudson Technologies : Initial Statement of Beneficial Ownership (Form 3)

About this update from Hudson Technologies, Inc.

FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940 OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5 (Print or Type Responses) 1. Name and Address of Reporting Person * Gaglione Kenneth 2. Date of Event Requiring Statement (Month/Day/Year) 11/24/2025 3. Issuer Name and Ticker or Trading Symbol HUDSON TECHNOLOGIES INC /NY [HDSN] (Last) (First) (Middle) C/O HUDSON TECHNOLOGIES, INC., 300 TICE BOULEVARD, SUITE 290 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President and CEO 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) WOODCLIFF LAKE, NJ 07677 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned 1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 37,504 D Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02) Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option 03/01/2023 03/01/2026 Common Stock 33,378 $10.09 D Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Gaglione Kenneth C/O HUDSON TECHNOLOGIES, INC. 300 TICE BOULEVARD, SUITE 290 WOODCLIFF LAKE, NJ 07677 X President and CEO Signatures /s/ Kenneth Gaglione 11/24/2025 ** Signature of Reporting Person Date Explanation of Responses: * If the form is filed by more than one reporting person, see Instruction 5(b)(v). ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.

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