Hudson Technologies (HDSN) insider Houghton exercises options, alters stake

Rhea-AI Filing Summary

Hudson Technologies Inc. insider activity: Director and Sr. VP–Sales and Marketing Kathleen Houghton reported multiple equity transactions dated January 8, 2026. She exercised stock options for 120,000 shares of common stock at $0.75 per share, 47,619 shares at $1.60 per share, and 50,888 shares at $3.81 per share. The filing also shows related dispositions of common stock using transaction code "F" totaling 44,873, 21,797, and 34,382 shares at a price of $7.10 per share. After these transactions, Houghton directly beneficially owned 158,618 shares of Hudson Technologies common stock.

Insider Trade Summary

218,507 shares exercised/converted

Mixed 9 txns

Insider Houghton Kathleen

Role Sr. VP-Sales and Marketing

Type	Security	Shares	Price	Value
Exercise	Stock Option	120,000	$0.00	--
Exercise	Stock Option	47,619	$0.00	--
Exercise	Stock Option	50,888	$0.00	--
Exercise	Common Stock	120,000	$0.75	$90K
Tax Withholding	Common Stock	44,873	$7.10	$319K
Exercise	Common Stock	47,619	$1.60	$76K
Tax Withholding	Common Stock	21,797	$7.10	$155K
Exercise	Common Stock	50,888	$3.81	$194K
Tax Withholding	Common Stock	34,382	$7.10	$244K

Holdings After Transaction: Stock Option — 0 shares (Direct); Common Stock — 161,163 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Houghton Kathleen

(Last) (First) (Middle)

C/O HUDSON TECHNOLOGIES, INC.

300 TICE BOULEVARD, SUITE 290

(Street)

WOODCLIFF LAKE NJ 07677

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
HUDSON TECHNOLOGIES INC /NY [ HDSN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Sr. VP-Sales and Marketing

3. Date of Earliest Transaction (Month/Day/Year)
01/08/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/08/2026		M		120,000	A	$0.75	161,163	D
Common Stock	01/08/2026		F		44,873	D	$7.1	116,290	D
Common Stock	01/08/2026		M		47,619	A	$1.6	163,909	D
Common Stock	01/08/2026		F		21,797	D	$7.1	142,112	D
Common Stock	01/08/2026		M		50,888	A	$3.81	193,000	D
Common Stock	01/08/2026		F		34,382	D	$7.1	158,618	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option	$0.75	01/08/2026		M			120,000	12/31/2020	12/19/2029	Common Stock	120,000	$0	0	D
Stock Option	$1.6	01/08/2026		M			47,619	03/12/2021	03/12/2026	Common Stock	47,619	$0	0	D
Stock Option	$3.81	01/08/2026		M			50,888	02/24/2023	02/24/2027	Common Stock	50,888	$0	0	D

Explanation of Responses:

	/s/ Kathleen Houghton	01/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (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.
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 Number.

FAQ

Who is the insider in Hudson Technologies (HDSN) 2026 Form 4?

The insider is Kathleen Houghton, who is both a director and Sr. VP–Sales and Marketing of Hudson Technologies Inc.

What stock option exercises did Kathleen Houghton report for HDSN on January 8, 2026?

She reported exercising stock options for 120,000 shares at $0.75, 47,619 shares at $1.60, and 50,888 shares at $3.81 per share, all into Hudson Technologies common stock.

What share disposals were reported in the Hudson Technologies (HDSN) Form 4?

The filing shows transactions with code "F" for 44,873, 21,797, and 34,382 Hudson Technologies common shares, each at a price of $7.10 per share.

How many Hudson Technologies shares does Kathleen Houghton own after the reported transactions?

Following the reported January 8, 2026 transactions, Kathleen Houghton directly beneficially owned 158,618 shares of Hudson Technologies common stock.

Does the Form 4 show that the reported Hudson Technologies transactions are held directly or indirectly?

The Form 4 reports Houghton’s ownership as direct (coded "D" in the ownership column) for the listed common stock and stock option positions.

What derivative securities are involved in this Hudson Technologies (HDSN) Form 4?

The filing lists stock options exercisable into Hudson Technologies common stock, with exercise prices of $0.75, $1.60, and $3.81 per share, all of which show 0 derivative securities remaining after the reported transactions.