Director Alan Sheriff buys 5,200 Hudson Technologies (HDSN) shares

Rhea-AI Filing Summary

HUDSON TECHNOLOGIES INC /NY director Alan Sheriff made an open-market purchase of company stock. He bought 5,200 shares of Common Stock at a price of $4.875 per share.

After this transaction, he directly owns a total of 9,265 shares of Hudson Technologies common stock.

Insider Trade Summary

Net Buyer: 5,200 shares ($25,350)

Net Buy 1 txn

Insider Sheriff Alan

Role null

Bought 5,200 shs ($25K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	5,200	$4.875	$25K

Holdings After Transaction: Common Stock — 9,265 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 5,200 shares Purchase price: $4.875 per share Shares owned after transaction: 9,265 shares

3 metrics

Shares purchased 5,200 shares Open-market purchase of Common Stock

Purchase price $4.875 per share Price paid for 5,200 shares

Shares owned after transaction 9,265 shares Directly owned Common Stock following purchase

Key Terms

open-market purchase, Common Stock, Form 4

3 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.

Common Stock financial

"security_title: "Common Stock" for the reported trade"

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 regulatory

"INSIDER FILING DATA (Form 4) for Hudson Technologies"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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^*

Sheriff Alan

(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)
05/13/2026

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		5,200	A	$4.875	9,265	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/ Alan Sheriff	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 Alan Sheriff report for HDSN?

Alan Sheriff reported an open-market purchase of Hudson Technologies Common Stock. He acquired 5,200 shares at $4.875 per share, increasing his direct holdings in the company to 9,265 shares following the transaction disclosed on the Form 4 filing.

How many Hudson Technologies (HDSN) shares did Alan Sheriff buy?

Alan Sheriff bought 5,200 shares of Hudson Technologies Common Stock. These shares were purchased in an open-market transaction at a price of $4.875 per share, as reported in his Form 4 insider trading disclosure filed with the SEC.

At what price did Alan Sheriff purchase HDSN stock?

Alan Sheriff purchased Hudson Technologies Common Stock at $4.875 per share. The Form 4 filing shows this price for his open-market acquisition of 5,200 shares, which brought his total directly owned position to 9,265 shares after the transaction.

What are Alan Sheriff’s Hudson Technologies holdings after this Form 4?

Following the reported transaction, Alan Sheriff directly owns 9,265 shares of Hudson Technologies Common Stock. This reflects his position after buying 5,200 shares at $4.875 per share in an open-market purchase disclosed in the Form 4 filing.

Was the Alan Sheriff HDSN trade a buy or sell transaction?

The transaction reported by Alan Sheriff was a buy. The Form 4 identifies it as an open-market purchase of 5,200 shares of Hudson Technologies Common Stock at $4.875 per share, increasing his directly held stake to 9,265 shares.