Hartree Partners (HDSN) reports 3.8M shares, files under Rule 13d-1(h)

Rhea-AI Filing Summary

Hudson Technologies Inc. ownership update: Hartree Partners reports beneficial ownership of 3,800,000 shares of Common Stock, representing 9.0% of the class. The filing states the Reporting Person "no longer hold securities of the Issuer with a purpose or effect of changing or influencing control of the Issuer" and is submitted under Rule 13d-1(h).

Insights

Institutional Ownership Analyst

Large passive stake disclosed — 3.8M shares (9.0%).

Hartree Partners reports 9.0% ownership via 3,800,000 shares, a meaningful position size for a single institutional holder. The filing classifies the holding under Rule 13d-1(h), indicating passive investor status rather than an active control intent.

Implications depend on Hartree's future filings; subsequent amendments would reveal any shift from passive to active intent.

Securities Filings Counsel

Filing style and regulatory posture are routine for large passive holders.

The statement references an earlier Schedule 13D and explains that the Reporting Person's investment intent changed on 12/08/2025, leading to this filing under Rule 13d-1(h). That rule is used when a previously active intent ceases and holdings are reported as passive.

Watch for any future amendments that would disclose a change in intent or differing voting/dispositive powers.

Key Figures

Shares beneficially owned: 3,800,000 shares Percent of class: 9.0% Filing date / Signature date: 06/05/2026 +2 more

5 metrics

Shares beneficially owned 3,800,000 shares beneficial ownership reported on cover page

Percent of class 9.0% percent of class stated on cover page

Filing date / Signature date 06/05/2026 signature date of the Schedule 13G

CUSIP 444144109 CUSIP for Hudson Technologies Common Stock

Sole voting power 3,800,000.00 sole voting power reported on cover page

Key Terms

Schedule 13G, Rule 13d-1(h), beneficially owned

3 terms

Schedule 13G regulatory

"The Reporting Person initially filed a with respect to the shares"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Rule 13d-1(h) regulatory

"filing this statement on pursuant to of the Exchange Act in accordance with Rule 13d-1(h)"

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: See cover page"

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.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

HUDSON TECHNOLOGIES INC /NY

(Name of Issuer)

Common Stock, par value $0.01

(Title of Class of Securities)

444144109

(CUSIP Number)

06/05/2026

(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 3,800,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 3,800,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,800,000.00

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)

9.0 %

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: This statement is filed by Hartree Partners, LP, a Delaware limited partnership ("Hartree Partners" or the "Reporting Person"). The Reporting Person initially filed a Schedule 13G with respect to the shares of Common Stock, par value $0.01 per share (the "Shares"), of the Issuer on March 12, 2025. Subsequently, on December 8, 2025, the Reporting Person's investment intent changed with respect to the securities of the Issuer and the Reporting Persons filed a Schedule 13D on December 10, 2025 in accordance with Rule 13d-1(e) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). As of the date hereof, the Reporting Person no longer hold securities of the Issuer with a purpose or effect of changing or influencing control of the Issuer, or in connection with or as a participant in any transaction having that purpose or effect. Accordingly, the Reporting Person is filing this statement on Schedule 13G pursuant to Rule 13d-1(c) of the Exchange Act in accordance with Rule 13d-1(h) of the Exchange Act.
(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 Number(s): 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:	06/05/2026

FAQ

What stake does Hartree Partners report in HDSN?

Hartree Partners reports beneficial ownership of 3,800,000 shares of HDSN Common Stock, representing 9.0% of the class, as stated on the cover page of the filing.

Does Hartree Partners intend to influence control of Hudson Technologies (HDSN)?

The filing states the Reporting Person "no longer hold securities of the Issuer with a purpose or effect of changing or influencing control," indicating the stake is reported as passive under Rule 13d-1(h).

When did Hartree Partners change its investment intent for HDSN?

The filing says the Reporting Person's investment intent changed on 12/08/2025, and a Schedule 13D was filed on 12/10/2025 reflecting that change in intent.

Who signed the Schedule 13G for Hartree Partners?

The statement is signed by Christine Stevenson, Chief Compliance Officer, with the signature date of 06/05/2026, as shown at the end of the filing.