HUDSON TECHNOLOGIES (HDSN) CEO trust buys 5,000 shares in open market

Rhea-AI Filing Summary

HUDSON TECHNOLOGIES INC /NY President and CEO Kenneth Gaglione reported an indirect open-market purchase of 5,000 shares of common stock at $4.895 per share by The Gaglione Trust. After this transaction, the trust holds 5,000 shares indirectly and Gaglione holds 37,504 shares directly.

Insider Trade Summary

Net Buyer: 5,000 shares ($24,475)

Net Buy 2 txns

Insider Gaglione Kenneth

Role President and CEO

Bought 5,000 shs ($24K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	5,000	$4.895	$24K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 5,000 shares (Indirect, By the Gaglione Trust); Common Stock — 37,504 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 5,000 shares Purchase price: $4.895 per share Indirect holdings after: 5,000 shares +3 more

6 metrics

Shares purchased 5,000 shares Open-market common stock purchase by The Gaglione Trust

Purchase price $4.895 per share Price for 5,000 common shares on open market

Indirect holdings after 5,000 shares Common stock held by The Gaglione Trust after purchase

Direct holdings after 37,504 shares Common stock held directly by Kenneth Gaglione

Net buy direction 5,000 net shares bought Transaction summary net-buy for this Form 4

Transaction date May 13, 2026 Date of reported common stock transactions

Key Terms

open-market purchase, indirect ownership, non-derivative, Common Stock

4 terms

open-market purchase financial

"transaction_action: open-market purchase"

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

indirect ownership financial

"ownership_type: indirect, nature_of_ownership: By the Gaglione Trust"

non-derivative financial

"transaction_type: non-derivative"

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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^*

Gaglione Kenneth

(Last) (First) (Middle)

C/O HUDSON TECHNOLOGIES, INC.

300 TICE BOULEVARD, SUITE 290

(Street)

WOODCLIFF LAKE NEW JERSEY 07677

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

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

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

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

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	05/13/2026		P		5,000	A	$4.895	5,000	I	By the Gaglione Trust
Common Stock								37,504	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

Explanation of Responses:

	/s/ Kenneth Gaglione	05/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did HDSN report for Kenneth Gaglione?

Kenneth Gaglione reported an indirect open-market purchase of 5,000 HUDSON TECHNOLOGIES INC /NY shares at $4.895 each. The transaction was made through The Gaglione Trust and reflects additional investment exposure to the company’s common stock.

How many HUDSON TECHNOLOGIES (HDSN) shares were bought and at what price?

The filing shows an indirect purchase of 5,000 common shares at $4.895 per share. This was an open-market transaction, indicating shares were acquired at prevailing market prices rather than via option exercises or grants.

Who holds the newly purchased HDSN shares from this Form 4?

The 5,000 newly purchased HUDSON TECHNOLOGIES INC /NY shares are held indirectly by The Gaglione Trust. Kenneth Gaglione is the reporting person, and the trust ownership is identified in the nature-of-ownership disclosure.

What are Kenneth Gaglione’s direct HDSN share holdings after the transaction?

Following the reported activity, Kenneth Gaglione directly holds 37,504 shares of HUDSON TECHNOLOGIES INC /NY common stock. This direct position is separate from the 5,000 shares held indirectly through The Gaglione Trust.

Is the HDSN CEO’s 5,000-share purchase a derivative or common stock transaction?

The 5,000-share acquisition is a non-derivative transaction in common stock, coded as an open-market purchase. No options or other derivative securities were exercised or converted as part of this specific transaction.