Kathleen Houghton

CIK: 0001824104

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)3 (42.9%)

Derivative conversions

Awards (A)1 (14.3%)

Compensation grants

Other (G, F, J, C, D, …)3 (42.9%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

HDSN

HUDSON TECHNOLOGIES INC /NY

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (7 total)

HDSN
HUDSON TECHNOLOGIES INC /NY
Jan 8, 2026
Exercise(M)
Direct
120K shares at avg. $0.75$90K
HDSN
HUDSON TECHNOLOGIES INC /NY
Jan 8, 2026
Tax Payment(F)
Direct
44.9K shares at avg. $7.10$319K
HDSN
HUDSON TECHNOLOGIES INC /NY
Jan 8, 2026
Exercise(M)
Direct
47.6K shares at avg. $1.60$76K
HDSN
HUDSON TECHNOLOGIES INC /NY
Jan 8, 2026
Tax Payment(F)
Direct
21.8K shares at avg. $7.10$155K
HDSN
HUDSON TECHNOLOGIES INC /NY
Jan 8, 2026
Exercise(M)
Direct
50.9K shares at avg. $3.81$194K
HDSN
HUDSON TECHNOLOGIES INC /NY
Jan 8, 2026
Tax Payment(F)
Direct
34.4K shares at avg. $7.10$244K
HDSN
HUDSON TECHNOLOGIES INC /NY
Mar 13, 2025
Award(A)
Stock Option
Direct
72.5K shares-

		Type	Shares	Price		Ownership
Jan 8, 2026	HDSN HUDSON TECHNOLOGIES INC /NY	Exercise(M)	120,000	$0.75	$90,000	Direct
Jan 8, 2026	HDSN HUDSON TECHNOLOGIES INC /NY	Tax Payment(F)	44,873	$7.10	$318,598	Direct
Jan 8, 2026	HDSN HUDSON TECHNOLOGIES INC /NY	Exercise(M)	47,619	$1.60	$76,190	Direct
Jan 8, 2026	HDSN HUDSON TECHNOLOGIES INC /NY	Tax Payment(F)	21,797	$7.10	$154,759	Direct
Jan 8, 2026	HDSN HUDSON TECHNOLOGIES INC /NY	Exercise(M)	50,888	$3.81	$193,883	Direct
Jan 8, 2026	HDSN HUDSON TECHNOLOGIES INC /NY	Tax Payment(F)	34,382	$7.10	$244,112	Direct
Mar 13, 2025	HDSN HUDSON TECHNOLOGIES INC /NY	Award(A) Stock Option	72,477	-	-	Direct

1-7 of 7 transactions

About Houghton Kathleen

Houghton Kathleen (SEC CIK 0001824104) files insider reports with the SEC as Sr. VP-Sales and Marketing of HUDSON TECHNOLOGIES INC /NY (HDSN).

Signal8 holds 2 ownership filings by Houghton Kathleen, all Form 4s, filed between Mar 17, 2025 and Jan 12, 2026. Those filings report 7 transactions, from Mar 13, 2025 to Jan 8, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Houghton Kathleen's filings is in WOODCLIFF LAKE, NJ.

Recent filings by Houghton Kathleen

Jan 8, 2026: Option exercise of HDSN shares (Form 4, code M).
Jan 8, 2026: Tax withholding of HDSN shares (Form 4, code F).
Jan 8, 2026: Option exercise of HDSN shares (Form 4, code M).
Jan 8, 2026: Tax withholding of HDSN shares (Form 4, code F).
Jan 8, 2026: Option exercise of HDSN shares (Form 4, code M).

Other insiders filing for HUDSON TECHNOLOGIES INC /NY (HDSN)

Hartree Partners, LP, 10% Owner
Sheriff Alan, Director
Prouty Eric A, Director
Parrillo Richard, Director
Mansy Loan Nguyen, Director
Bulgarino Nicole E, Director

How to read Form 4 transaction codes