Director at Hudson Technologies (HDSN) makes open-market share purchase

Rhea-AI Filing Summary

HUDSON TECHNOLOGIES INC /NY director Nicole E. Bulgarino bought shares of the company in the open market. On May 14, 2026, she made an open-market purchase of 550 shares of Common Stock at a price of $4.845 per share.

After this transaction, her direct ownership increased to 11,048 shares. This filing records a single insider buy with no derivative securities reported as part of this transaction.

Insider Trade Summary

Net Buyer: 550 shares ($2,665)

Net Buy 1 txn

Insider Bulgarino Nicole E

Role null

Bought 550 shs ($3K)

Type	Security	Shares	Price	Value
Purchase	Common Stock	550	$4.845	$3K

Holdings After Transaction: Common Stock — 11,048 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 550 shares Purchase price: $4.845 per share Shares owned after transaction: 11,048 shares +2 more

5 metrics

Shares purchased 550 shares Open-market purchase on May 14, 2026

Purchase price $4.845 per share Common Stock transaction

Shares owned after transaction 11,048 shares Director’s direct holdings post-transaction

Transaction type Open-market purchase Non-derivative Common Stock

Transaction code P Purchase in open market or private transaction

Key Terms

Common Stock, open-market purchase, Form 4, non-derivative

4 terms

Common Stock financial

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

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" describing the buy"

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.

Form 4 regulatory

"INSIDER FILING DATA (Form 4) describing the insider report"

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.

non-derivative financial

"transaction_type: "non-derivative" for the Common Stock trade"

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^*

Bulgarino Nicole E

(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		550	A	$4.845	11,048	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/ Nicole E. Bulgarino	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 Hudson Technologies (HDSN) report?

Hudson Technologies reported an insider open-market purchase by director Nicole E. Bulgarino. She bought 550 shares of Common Stock at $4.845 per share, increasing her direct holdings to 11,048 shares after the transaction.

How many Hudson Technologies (HDSN) shares did the director buy and at what price?

Director Nicole E. Bulgarino bought 550 shares of Hudson Technologies Common Stock at a price of $4.845 per share. The transaction was classified as an open-market purchase on May 14, 2026, according to the Form 4 data.

What are Nicole E. Bulgarino’s Hudson Technologies (HDSN) holdings after this Form 4 transaction?

Following the reported purchase, director Nicole E. Bulgarino directly owns 11,048 shares of Hudson Technologies Common Stock. The Form 4 shows this updated total share count immediately after her 550-share open-market purchase on May 14, 2026.

Was the Hudson Technologies (HDSN) insider trade a buy or a sell?

The Hudson Technologies insider trade was a buy. Director Nicole E. Bulgarino executed an open-market purchase of 550 shares of Common Stock at $4.845 per share, with no sales or derivative exercises reported in this filing.

Does the Hudson Technologies (HDSN) Form 4 include any derivative securities?

No derivative securities are reported in this Form 4. The filing shows only a non-derivative transaction: an open-market purchase of 550 shares of Common Stock by director Nicole E. Bulgarino, with her direct holdings rising to 11,048 shares afterward.