Hartree Partners reports 11.8% stake in Hudson Technologies

Hudson Technologies Inc. Schedule 13G/A amendment reports that Hartree Partners beneficially owned 4,971,302 shares of Hudson Technologies common stock, representing 11.8% of the class as of 06/30/2026.

Rhea-AI Filing Summary

Hudson Technologies Inc. Schedule 13G/A amendment reports that Hartree Partners beneficially owned 4,971,302 shares of Hudson Technologies common stock, representing 11.8% of the class as of 06/30/2026. The filing shows Hartree holds sole voting and dispositive power over the same 4,971,302 shares.

Insights

Institutional Ownership Analyst

Hartree Partners reports an 11.8% stake with full voting and dispositive authority.

Hartree Partners is disclosed as beneficial owner of 4,971,302 shares of Hudson Technologies common stock as of 06/30/2026. The filing attributes both sole voting power and sole dispositive power over those shares to Hartree.

Because this is a Schedule 13G/A amendment, it is a passive ownership disclosure rather than an active transaction; subsequent filings may show changes in intent or status.

Key Figures

Beneficial ownership: 4,971,302 shares Percent of class: 11.8% Sole voting/dispositive power: 4,971,302 shares

3 metrics

Beneficial ownership 4,971,302 shares as of 06/30/2026

Percent of class 11.8% as of 06/30/2026

Sole voting/dispositive power 4,971,302 shares reported on Schedule 13G/A cover page

Key Terms

Schedule 13G/A, Beneficially owned, Sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1; Schedule 13G/A amendment reporting beneficial ownership"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficially owned financial

"Amount beneficially owned: See cover page; 4,971,302 shares"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole dispositive power regulatory

"Sole Dispositive Power 4,971,302.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

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

What stake does Hartree Partners report in HDSN?

Hartree Partners reports beneficial ownership of 4,971,302 shares, equal to 11.8% of Hudson Technologies' common stock as of 06/30/2026. The filing lists both sole voting and sole dispositive power over these shares.

Does Hartree Partners control the shares it reports for HDSN?

Yes. The amendment indicates Hartree Partners has sole voting power and sole dispositive power over 4,971,302 shares of common stock, according to the cover-page ownership figures dated 06/30/2026.

What form was filed to disclose Hartree's holdings in HDSN?

Hartree Partners filed a Schedule 13G/A amendment for Hudson Technologies' common stock (CUSIP 444144109), identifying ownership and voting/dispositive powers and signed by Christine Stevenson, Chief Compliance Officer, on 07/02/2026.

Is this Schedule 13G/A an indication of active trading by Hartree in HDSN?

No. A Schedule 13G/A generally reports passive or institutional ownership rather than active control transactions. The amendment here reports beneficial ownership and powers; it does not itself disclose purchases or sales.

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

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Accepted by SEC EDGAR 07/02/2026 - 05:55 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

HUDSON TECHNOLOGIES INC /NY

(Name of Issuer)

Common Stock, par value $0.01

(Title of Class of Securities)

444144109

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 444144109

1

Names of Reporting Persons

Hartree Partners, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,971,302.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,971,302.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,971,302.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

11.8 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: HUDSON TECHNOLOGIES INC /NY
(b)	Address of issuer's principal executive offices: PO BOX 1541, ONE BLUE HILL PLAZA, 14TH FLOOR, PEARL RIVER, NY 10965
Item 2.
(a)	Name of person filing: Hartree Partners, LP
(b)	Address or principal business office or, if none, residence: 1185 Avenue of the Americas, New York, NY 10036
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock, par value $0.01
(e)	CUSIP No.: 444144109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See cover page
(b)	Percent of class: See cover page
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See cover page
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: See cover page
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Hartree Partners, LP

Signature:	/s/ Christine Stevenson
Name/Title:	Christine Stevenson, Chief Compliance Officer
Date:	07/02/2026