Hudson Technologies holder buys 65,550 shares

Hartree Partners, LP, a ten percent owner of Hudson Technologies, reported purchases totaling 65,550 shares of common stock on July 20-21, 2026.

Rhea-AI Filing Summary

Hartree Partners, LP, a ten percent owner of Hudson Technologies, reported purchases totaling 65,550 shares of common stock on July 20-21, 2026. It bought 17,842 shares at a weighted average price of $5.9892 and 47,708 shares at $5.9894 per share, with individual trades between $5.9850 and $5.9900. Hartree disclaims beneficial ownership beyond its pecuniary interest, and the trades were not indicated as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Buyer: 65,550 shares

Net Buy 2 txns

Insider Hartree Partners, LP

Role 10% Owner

Bought 65,550 shs ($393K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 F1, F3	47,708	$5.9894	$286K
Purchase	Common Stock, par value $0.01 F1, F2	17,842	$5.9892	$107K

Holdings After Transaction: Common Stock, par value $0.01 — 5,042,086 shares (Direct)

Footnotes (3)

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 $5.9850 to $5.9900, 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.
3. F3. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.9850 to $5.9900, 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 2026-07-20: 17,842 shares Shares purchased 2026-07-21: 47,708 shares Total shares purchased: 65,550 shares +3 more

6 metrics

Shares purchased 2026-07-20 17,842 shares Common stock bought by Hartree Partners, LP on July 20, 2026

Shares purchased 2026-07-21 47,708 shares Common stock bought by Hartree Partners, LP on July 21, 2026

Total shares purchased 65,550 shares Aggregate Hudson Technologies common stock purchases on July 20-21, 2026

Weighted avg price 2026-07-20 $5.9892 per share Weighted average purchase price; trades from $5.9850 to $5.9900

Weighted avg price 2026-07-21 $5.9894 per share Weighted average purchase price; trades from $5.9850 to $5.9900

Trade price range $5.9850-$5.9900 per share Range of individual trade prices noted in footnotes F2 and F3

Key Terms

beneficial ownership, pecuniary interest, weighted average price, Section 16

4 terms

beneficial ownership financial

"The Reporting Person 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 financial

"except to the extent of its pecuniary interest therein"

weighted average price financial

"Represents a weighted average price. These shares were purchased in multiple transactions"

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.

Section 16 regulatory

"beneficial owner of such securities for purposes of Section 16 or for any other purpose"

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 purchases of HDSN stock did Hartree Partners, LP report?

Hartree Partners, LP reported buying 65,550 Hudson Technologies common shares, including 17,842 shares on July 20, 2026 at a weighted average price of $5.9892 and 47,708 shares on July 21, 2026 at $5.9894 per share, in multiple trades within a narrow price range.

At what prices were Hartree Partners' recent HDSN share purchases executed?

The filing shows weighted average purchase prices of $5.9892 per share on July 20, 2026 and $5.9894 on July 21, 2026. Each day's figure reflects multiple trades in Hudson Technologies common stock at prices between $5.9850 and $5.9900 per share.

Is Hartree Partners, LP considered an insider or major holder of HDSN?

Hartree Partners, LP is identified in the report as a ten percent owner of Hudson Technologies, but it disclaims beneficial ownership of the securities except to the extent of its pecuniary interest. Hartree is not reported as a director or officer of the company.

Were Hartree Partners' HDSN trades made under a Rule 10b5-1 trading plan?

No; the document level Rule 10b5-1 checkbox is not marked as affirming a trading plan, indicating these purchases were not reported under a Rule 10b5-1 plan. The trades are instead classified simply as open-market or private purchase transactions in Hudson Technologies stock.

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

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Accepted by SEC EDGAR 07/22/2026 - 04:29 PM EDT 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)
07/20/2026

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)	07/20/2026		P		17,842	A	$5.9892(2)	4,994,378	D
Common Stock, par value $0.01(1)	07/21/2026		P		47,708	A	$5.9894(3)	5,042,086	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 $5.9850 to $5.9900, 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.

3. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $5.9850 to $5.9900, 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	07/22/2026
	** 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)