Hartree buys 11K Hudson Technologies shares

HUDSON TECHNOLOGIES INC /NY (HDSN) had a Form 4 filed reporting that Hartree Partners, LP, a ten percent owner, purchased 11,136 shares of common stock on September 16, 2026 at $5.10 per share in an open market or private transaction.

Rhea-AI Filing Summary

HUDSON TECHNOLOGIES INC /NY (HDSN) had a Form 4 filed reporting that Hartree Partners, LP, a ten percent owner, purchased 11,136 shares of common stock on September 16, 2026 at $5.10 per share in an open market or private transaction. Following this purchase, Hartree Partners, LP is reported as holding 5,216,453 shares, while disclaiming beneficial ownership except to the extent of its pecuniary interest.

Insider Trade Summary

Net Buyer: 11,136 shares

Net Buy 1 txn

Insider Hartree Partners, LP

Role 10% Owner

Bought 11,136 shs ($57K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 F1	11,136	$5.10	$57K

Holdings After Transaction: Common Stock, par value $0.01 — 5,216,453 shares (Direct)

Footnotes (1)

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.

Key Figures

Shares purchased: 11,136 shares Purchase price per share: $5.10 per share Shares held after transaction: 5,216,453 shares

3 metrics

Shares purchased 11,136 shares Common stock purchased on September 16, 2026

Purchase price per share $5.10 per share Price paid for the September 16, 2026 common stock purchase

Shares held after transaction 5,216,453 shares Hudson Technologies common stock reported as held by Hartree Partners, LP after the purchase

Key Terms

ten percent owner, pecuniary interest, beneficial ownership, Section 16

4 terms

ten percent owner regulatory

"Hartree Partners, LP is identified as a ten percent owner of the issuer"

pecuniary interest financial

"disclaims beneficial ownership except to the extent of its pecuniary interest therein"

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.

Section 16 regulatory

"not be deemed to be an admission that the Reporting Person is the beneficial owner of such securities for purposes of Section 16"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

FAQ

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

What insider transaction did Hartree Partners, LP report for HDSN on this Form 4?

Hartree Partners, LP reported a purchase of 11,136 shares of Hudson Technologies common stock on September 16, 2026 in an open market or private transaction at $5.10 per share.

How many HDSN shares does Hartree Partners, LP report holding after this transaction?

After the reported transaction, Hartree Partners, LP is shown as holding 5,216,453 shares of Hudson Technologies common stock, subject to its disclaimer of beneficial ownership beyond its pecuniary interest.

Was the HDSN Form 4 transaction by Hartree Partners, LP under a Rule 10b5-1 trading plan?

The filing indicates that no Rule 10b5-1 trading plan was affirmed for this transaction; the document-level checkbox for such a plan is not selected.

What type of security did Hartree Partners, LP buy in Hudson Technologies (HDSN)?

Hartree Partners, LP purchased Common Stock, par value $0.01, of Hudson Technologies Inc., as reported on this Form 4.

Does Hartree Partners, LP claim full beneficial ownership of the HDSN shares reported?

No. Hartree Partners, LP disclaims beneficial ownership of the reported securities except to the extent of its pecuniary interest, and states that the report is not an admission of beneficial ownership for Section 16 or other purposes.

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

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/18/2026 - 04:16 PM Accepted by SEC EDGAR 09/18/2026 - 04:16 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)
09/16/2026

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)	09/16/2026		P		11,136	A	$5.1	5,216,453	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.

	Hartree Partners, LP, By: /s/ Christine Stevenson, Chief Compliance Officer	09/18/2026
	** 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)