Director adds 5,000 Hudson Technologies (HDSN) shares in market

Rhea-AI Filing Summary

Hudson Technologies director Richard Parrillo reported open-market purchases of the company’s Common Stock. On May 14, 2026, he bought a total of 5,000 shares in two trades at prices of $4.97 and $4.96 per share.

Insider Trade Summary

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

Net Buy 2 txns

Insider Parrillo Richard

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

Shares purchased: 5,000 shares First trade size: 1,400 shares First trade price: $4.97 per share +4 more

7 metrics

Shares purchased 5,000 shares Total Common Stock bought on May 14, 2026

First trade size 1,400 shares Open-market purchase of Common Stock

First trade price $4.97 per share Price for 1,400-share purchase on May 14, 2026

Second trade size 3,600 shares Open-market purchase of Common Stock

Second trade price $4.96 per share Price for 3,600-share purchase on May 14, 2026

Buy transactions count 2 transactions Number of open-market purchases reported

Net buy direction net-buy Transaction summary for reported trades

Key Terms

Common Stock, open-market purchase, transaction code "P", non-derivative, +1 more

5 terms

Common Stock financial

"he bought a total of 5,000 shares in two trades of 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

"he bought a total of 5,000 shares in two trades at prices of $4.97 and $4.96 per share as open-market purchases"

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.

transaction code "P" regulatory

"The Form 4 uses transaction code “P,” described as a purchase in an open market or private transaction"

non-derivative financial

"the reported trades involve only non-derivative Common Stock purchases on the open market"

Form 4 regulatory

"This Form 4 reports only purchases, with no insider sales"

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^*

Parrillo Richard

(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 did Hudson Technologies (HDSN) director Richard Parrillo report on this Form 4?

Director Richard Parrillo reported open-market purchases of Hudson Technologies Common Stock. On May 14, 2026, he bought a total of 5,000 shares in two separate transactions, indicating additional personal capital committed at prices just under five dollars per share.

How many Hudson Technologies (HDSN) shares did Richard Parrillo buy and at what prices?

Richard Parrillo bought 5,000 Hudson Technologies Common Stock shares. The Form 4 shows two trades: 1,400 shares at $4.97 per share and 3,600 shares at $4.96 per share, both executed as open-market purchases on May 14, 2026.

Was the Hudson Technologies (HDSN) insider transaction an open-market purchase or another type?

The filing identifies both transactions as open-market purchases of Common Stock. The Form 4 uses transaction code “P,” described as a purchase in an open market or private transaction, meaning cash was paid for the shares rather than shares being granted as compensation.

Does the Hudson Technologies (HDSN) Form 4 show any insider sales by Richard Parrillo?

This Form 4 reports only purchases, with no insider sales. The transaction summary shows a buy count of two, sell count of zero, and net-buy direction, reflecting exclusively net buying activity in Hudson Technologies Common Stock on May 14, 2026.

Are there any derivative securities or option exercises in this Hudson Technologies (HDSN) Form 4?

No derivative activity is reported in this Form 4. The derivative summary is empty and the transaction summary shows zero derivative transactions and zero exercise shares, indicating the reported trades involve only non-derivative Common Stock purchases on the open market.