Director Mansy Loan Nguyen adds 5,000 Hudson Technologies (HDSN) shares in open-market buys

Rhea-AI Filing Summary

HUDSON TECHNOLOGIES INC /NY director Mansy Loan Nguyen reported buying 5,000 shares of HDSN common stock in open-market transactions. The purchases occurred on May 14, 2026 at prices of about $4.96–$4.97 per share, reflecting additional direct ownership in the company.

Insider Trade Summary

Net Buyer: 5,000 shares ($24,814)

Net Buy 2 txns

Insider Mansy Loan Nguyen

Role null

Bought 5,000 shs ($25K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	3,600	$4.96	$18K
Purchase	Common Stock	1,400	$4.97	$7K

Holdings After Transaction: Common Stock — 24,195 shares (Direct, null)

Footnotes (1)

Key Figures

Open-market buy 1: 1,400 shares at $4.97 Open-market buy 2: 3,600 shares at $4.96 Total shares bought: 5,000 shares

3 metrics

Open-market buy 1 1,400 shares at $4.97 Common Stock purchase on May 14, 2026

Open-market buy 2 3,600 shares at $4.96 Common Stock purchase on May 14, 2026

Total shares bought 5,000 shares Net open-market purchases in this Form 4

Key Terms

Common Stock, open-market purchase, non-derivative, transaction code P

4 terms

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.

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.

non-derivative financial

"transaction_type: "non-derivative""

transaction code P financial

"transaction_code_description: "Purchase in open market or private transaction""

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^*

Mansy Loan Nguyen

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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	05/14/2026		P		3,600	A	$4.96	24,195	D
Common Stock	05/14/2026		P		1,400	A	$4.97	25,595	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/ Loan Nguyen Mansy	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 trading activity did HDSN director Mansy Loan Nguyen report?

Nguyen reported buying 5,000 HDSN common shares in open-market transactions. The Form 4 shows two separate purchases on May 14, 2026, increasing the director’s directly owned stake in Hudson Technologies Inc.

How many Hudson Technologies (HDSN) shares were purchased in this Form 4?

A total of 5,000 HDSN common shares were purchased. The filing lists one 1,400-share trade and one 3,600-share trade, both coded as open-market purchases under transaction code P.

At what prices did Mansy Loan Nguyen buy HDSN shares?

The director bought HDSN shares around the mid-$4 range. One trade was at $4.97 per share for 1,400 shares, and another was at $4.96 per share for 3,600 shares, both on May 14, 2026.

Were the HDSN insider transactions open-market purchases or another type?

Both transactions were open-market purchases of common stock. The Form 4 lists transaction code P and describes them as purchases in open market or private transactions, categorized as non-derivative common stock.

Does this HDSN Form 4 show any insider sales?

No insider sales are reported in this Form 4. The transaction summary shows two buy transactions totaling 5,000 shares and zero sell, gift, tax-withholding, or derivative exercise transactions for Hudson Technologies common stock.