Hartree buys 100K Hudson Technologies shares

HUDSON TECHNOLOGIES INC /NY (HDSN) reported that Hartree Partners, LP, a more-than-10% owner, purchased a total of 100,612 shares of common stock in open-market transactions.

Rhea-AI Filing Summary

HUDSON TECHNOLOGIES INC /NY (HDSN) reported that Hartree Partners, LP, a more-than-10% owner, purchased a total of 100,612 shares of common stock in open-market transactions. On 2026-08-25, Hartree bought 91,166 shares at a weighted average price of $5.4965 per share, with individual trades between $5.48 and $5.50. On 2026-08-24, it bought an additional 9,446 shares at $5.50 per share. The reporting person disclaims beneficial ownership beyond its pecuniary interest, and the trades were not reported as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Net Buyer: 100,612 shares

Net Buy 2 txns

Insider Hartree Partners, LP

Role 10% Owner

Bought 100,612 shs ($553K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 F1, F2	91,166	$5.4965	$501K
Purchase	Common Stock, par value $0.01 F1	9,446	$5.50	$52K

Holdings After Transaction: Common Stock, par value $0.01 — 5,200,000 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 $5.4800 to $5.5000, 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 2026-08-25: 91,166 shares Weighted average price 2026-08-25: $5.4965 per share Price range 2026-08-25: $5.4800–$5.5000 per share +3 more

6 metrics

Shares purchased 2026-08-25 91,166 shares Open-market purchase of Hudson Technologies common stock by Hartree Partners, LP

Weighted average price 2026-08-25 $5.4965 per share Weighted average purchase price; individual trades ranged from $5.4800 to $5.5000

Price range 2026-08-25 $5.4800–$5.5000 per share Range of prices for multiple purchase transactions on 2026-08-25

Shares purchased 2026-08-24 9,446 shares Open-market purchase of Hudson Technologies common stock by Hartree Partners, LP

Price 2026-08-24 $5.50 per share Per-share purchase price for 9,446 shares on 2026-08-24

Total shares purchased 100,612 shares Sum of reported purchases on 2026-08-24 and 2026-08-25

Key Terms

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

4 terms

weighted average price financial

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

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.

pecuniary interest financial

"disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest"

beneficial ownership regulatory

"disclaims beneficial ownership of the securities reported herein except"

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

"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 transactions were reported for HDSN by Hartree Partners, LP?

Hartree Partners, LP reported two open-market purchases of Hudson Technologies common stock, totaling 100,612 shares on 2026-08-24 and 2026-08-25, at prices around $5.48–$5.50 per share.

How many HDSN shares did Hartree Partners, LP buy on 2026-08-25?

On 2026-08-25, Hartree Partners, LP bought 91,166 HDSN shares at a weighted average price of $5.4965 per share, with individual trades executed between $5.4800 and $5.5000.

What was the HDSN trade on 2026-08-24 reported by Hartree Partners, LP?

On 2026-08-24, Hartree Partners, LP purchased 9,446 shares of Hudson Technologies common stock at a price of $5.50 per share in an open-market transaction.

Were Hartree Partners, LP’s HDSN trades under a Rule 10b5-1 plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox was not checked, and there is no footnote stating the trades were made pursuant to a Rule 10b5-1 trading plan.

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

No. Hartree Partners, LP states it disclaims beneficial ownership of the reported Hudson Technologies securities except to the extent of its pecuniary interest in them.

What type of security did Hartree Partners, LP trade in HDSN?

Hartree Partners, LP traded Common Stock, par value $0.01, of Hudson Technologies Inc., as reported in the Form 4 insider filing.

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

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Available on EDGAR 08/26/2026 - 05:32 PM EDT Accepted by SEC EDGAR 08/26/2026 - 05:31 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)
08/24/2026

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)	08/24/2026		P		9,446	A	$5.5	5,108,834	D
Common Stock, par value $0.01(1)	08/25/2026		P		91,166	A	$5.4965(2)	5,200,000	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 $5.4800 to $5.5000, 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	08/26/2026
	** 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)