Hudson Technologies 10% owner buys 118,549 shares

Hudson Technologies Inc. (HDSN) reported that Hartree Partners, LP, a 10% owner, directly purchased 118,549 shares of common stock on September 24, 2026, at a weighted average price of $5.0987 per share; the purchases ranged from $5.0750 to $5.1000 per share.

Rhea-AI Filing Summary

Hudson Technologies Inc. (HDSN) reported that Hartree Partners, LP, a 10% owner, directly purchased 118,549 shares of common stock on September 24, 2026, at a weighted average price of $5.0987 per share; the purchases ranged from $5.0750 to $5.1000 per share. Hartree reported direct holdings of 5,348,517 shares following the purchase. No Rule 10b5-1 plan is reported. Hartree disclaims beneficial ownership except to the extent of its pecuniary interest.

Insider Trade Summary

Net Buyer: 118,549 shares

Net Buy 1 txn

Insider Hartree Partners, LP

Role 10% Owner

Bought 118,549 shs ($604K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 F1, F2	118,549	$5.0987	$604K

Holdings After Transaction: Common Stock, par value $0.01 — 5,348,517 shares (Direct)

Footnotes (2)

1. F1. The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, and this report shall not be deemed to be an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.
2. F2. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.0750 to $5.1000, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

Key Figures

Shares purchased: 118,549 shares Weighted average purchase price: $5.0987 per share Transaction price range: $5.0750–$5.1000 per share +1 more

4 metrics

Shares purchased 118,549 shares September 24, 2026

Weighted average purchase price $5.0987 per share September 24, 2026

Transaction price range $5.0750–$5.1000 per share Prices across multiple purchases on September 24, 2026

Direct shares following purchase 5,348,517 shares Reported after the September 24, 2026 purchase

Key Terms

weighted average price, beneficial ownership, pecuniary interest

3 terms

weighted average price financial

"Represents a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

beneficial ownership regulatory

"disclaims beneficial ownership of the securities reported herein"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest regulatory

"except to the extent of its pecuniary interest therein"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many HDSN shares did Hartree Partners buy, and at what price?

Hartree Partners, LP purchased 118,549 shares of Hudson Technologies common stock on September 24, 2026, at a weighted average price of $5.0987 per share. The purchases were made in multiple transactions at prices from $5.0750 to $5.1000 per share, and no Rule 10b5-1 plan is reported.

How many HDSN shares did Hartree Partners hold after the purchase?

Hartree Partners, LP reported direct holdings of 5,348,517 shares after the September 24, 2026 purchase. It disclaimed beneficial ownership of the securities except to the extent of its pecuniary interest.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/28/2026 - 04:25 PM Accepted by SEC EDGAR 09/28/2026 - 04:25 PM Learn about SEC filing dates

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^*

Hartree Partners, LP

(Last) (First) (Middle)

1185 AVE OF THE AMERICAS

(Street)

NEW YORK NEW YORK 10036

(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)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/24/2026

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, par value $0.01(1)	09/24/2026		P		118,549	A	$5.0987(2)	5,348,517	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:

1. The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, and this report shall not be deemed to be an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

2. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.0750 to $5.1000, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

	Hartree Partners, LP, By: /s/ Christine Stevenson, Chief Compliance Officer	09/28/2026
	** 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)