Hudson Technologies: Hartree buys 300,000 shares

The 10% owner’s two reported weighted-average prices each covered multiple trades within a stated range.

Available on EDGAR 11/02/2026 - 04:38 PM EST Accepted by SEC EDGAR 11/02/2026 - 04:37 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Hudson Technologies Inc. (HDSN) had three direct common-stock purchases reported by 10% owner Hartree Partners, LP, totaling 300,000 shares: 200,000 on October 29, 2026, at a weighted average of $4.4430 per share; 58,710 on October 30 at a weighted average of $4.2498; and 41,290 on November 2 at $4.2500. The first two prices reflect multiple trades within ranges of $4.1350–$4.5000 and $4.2450–$4.2500, respectively. Hartree disclaimed beneficial ownership except to the extent of its pecuniary interest; no Rule 10b5-1 plan is reported.

Insider Trade Summary

Net Buyer: 300,000 shares

Net Buy 3 txns

Insider Hartree Partners, LP

Role 10% Owner

Bought 300,000 shs ($1.31M)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 F1	41,290	$4.25	$175K
Purchase	Common Stock, par value $0.01 F1, F3	58,710	$4.2498	$250K
Purchase	Common Stock, par value $0.01 F1, F2	200,000	$4.443	$889K

Holdings After Transaction: Common Stock, par value $0.01 — 5,648,517 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 $4.1350 to $4.5000, 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.
3. F3. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.2450 to $4.2500, 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: 200,000 shares Weighted-average purchase price: $4.4430 per share Shares purchased: 58,710 shares +3 more

6 metrics

Shares purchased 200,000 shares October 29, 2026

Weighted-average purchase price $4.4430 per share For shares purchased October 29, 2026; trades ranged from $4.1350 to $4.5000.

Shares purchased 58,710 shares October 30, 2026

Weighted-average purchase price $4.2498 per share For shares purchased October 30, 2026; trades ranged from $4.2450 to $4.2500.

Shares purchased 41,290 shares November 2, 2026

Purchase price $4.2500 per share For shares purchased November 2, 2026.

Key Terms

weighted average price, pecuniary interest, beneficial ownership

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.

pecuniary interest regulatory

"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.

FAQ

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

How many HDSN shares did Hartree Partners purchase?

Hartree Partners, LP reported purchases totaling 300,000 shares: 200,000 on October 29, 58,710 on October 30, and 41,290 on November 2, 2026. No Rule 10b5-1 plan is reported.

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

Form 4 Insider Transactions: What Each Field Means →

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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)
10/29/2026

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)	10/29/2026		P		200,000	A	$4.443(2)	5,548,517	D
Common Stock, par value $0.01(1)	10/30/2026		P		58,710	A	$4.2498(3)	5,607,227	D
Common Stock, par value $0.01(1)	11/02/2026		P		41,290	A	$4.25	5,648,517	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 $4.1350 to $4.5000, 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.

3. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.2450 to $4.2500, 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	11/02/2026
	** 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)