Hudson Technologies (HDSN) stake: Dimensional Fund reports 4.7% ownership

Rhea-AI Filing Summary

Dimensional Fund Advisors LP, a Delaware limited partnership and registered investment adviser, reports beneficial ownership of 1,967,914 shares of Hudson Technologies Inc common stock, representing 4.7% of the class. The position is reported as ownership of 5 percent or less of the outstanding common stock.

Dimensional has sole voting power over 1,922,611 shares and sole dispositive power over 1,967,914 shares, with no shared voting or dispositive power. All securities are owned by underlying funds and accounts for which Dimensional or its subsidiaries provide investment management. Dimensional states that it may be deemed a beneficial owner for Section 13(d) purposes but disclaims beneficial ownership of these securities and notes that, to its knowledge, no single underlying fund holds more than 5% of the class.

Key Figures

Beneficial ownership: 1,967,914 shares Percent of class owned: 4.7 % Sole voting power: 1,922,611 shares +1 more

4 metrics

Beneficial ownership 1,967,914 shares Hudson Technologies common stock reported by Dimensional Fund Advisors

Percent of class owned 4.7 % Portion of Hudson Technologies common stock class beneficially owned

Sole voting power 1,922,611 shares Shares of Hudson Technologies over which Dimensional has sole power to vote

Sole dispositive power 1,967,914 shares Shares of Hudson Technologies over which Dimensional has sole power to dispose

Key Terms

beneficial owner, sole voting power, sole dispositive power, Investment Advisers Act of 1940, +1 more

5 terms

beneficial owner regulatory

"may be deemed to be the beneficial owner of the shares of the Issuer"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

sole voting power regulatory

"Sole Voting Power 1,922,611.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power regulatory

"Sole Dispositive Power 1,967,914.00"

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.

Investment Advisers Act of 1940 regulatory

"an investment adviser registered under Section 203 of the Investment Advisors Act of 1940"

A U.S. federal law that sets rules for people and firms who give investment advice, requiring them to register with regulators, be honest about conflicts, keep records, and follow basic standards of care. It matters to investors because those rules act like licensing and consumer protections — similar to having safety standards for a mechanic — helping ensure advisers act in clients’ financial interests and reducing the risk of fraud or misuse of funds.

Section 13(d) of the Securities Exchange Act of 1934 regulatory

"for any other purposes than Section 13(d) of the Securities Exchange Act of 1934"

Section 13(d) of the Securities Exchange Act of 1934 is a U.S. rule that requires anyone who buys more than 5% of a public company’s shares to publicly disclose who they are, how many shares they own, and their intentions toward the company. For investors, this is like a neighborhood alert when someone acquires a large stake in a building: it reveals potential changes in control or strategy that could affect the stock’s price, governance, or future direction.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 07/14/2026 - 01:29 PM Accepted by SEC EDGAR 07/14/2026 - 01:27 PM Learn about SEC filing dates

FAQ

What percentage of Hudson Technologies (HDSN) does Dimensional Fund Advisors report owning?

Dimensional Fund Advisors reports beneficial ownership of 4.7% of Hudson Technologies’ common stock, corresponding to 1,967,914 shares. The position is characterized as ownership of 5 percent or less of the outstanding common stock under Section 13(d) reporting.

How many Hudson Technologies (HDSN) shares does Dimensional Fund Advisors control voting for?

Dimensional Fund Advisors reports sole voting power over 1,922,611 Hudson Technologies shares and no shared voting power. It also reports sole dispositive power over 1,967,914 shares, reflecting its authority to direct the disposition of all reported shares.

Who is considered to own the Hudson Technologies (HDSN) shares managed by Dimensional Fund Advisors?

The underlying funds and accounts advised or managed by Dimensional Fund Advisors and its subsidiaries own the Hudson Technologies shares. Dimensional may be deemed a beneficial owner for Section 13(d) purposes but expressly disclaims beneficial ownership of these securities.

Does any single Dimensional-managed fund hold more than 5% of Hudson Technologies (HDSN)?

According to Dimensional, the interest of any one fund in Hudson Technologies does not exceed 5% of the common stock class. The reported 4.7% ownership reflects the combined holdings of multiple funds and accounts it advises or manages.

Why is Dimensional Fund Advisors reporting its Hudson Technologies (HDSN) position?

Dimensional Fund Advisors is reporting its Hudson Technologies holdings as a beneficial owner under Section 13(d) of the Securities Exchange Act of 1934. The report discloses its 1,967,914-share position, related voting and dispositive powers, and its disclaimer of beneficial ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Hudson Technologies Inc

(Name of Issuer)

Common Stock

(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

Dimensional Fund Advisors 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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,922,611.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,967,914.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,967,914.00

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)

4.7 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Hudson Technologies Inc
(b)	Address of issuer's principal executive offices: 300 Tice Blvd, Suite 290, 2nd Floor, Woodcliff Lake, NJ 07677
Item 2.
(a)	Name of person filing: Dimensional Fund Advisors LP
(b)	Address or principal business office or, if none, residence: 6300 Bee Cave Road, Building One, Austin, TX 78746
(c)	Citizenship: Delaware Limited Partnership
(d)	Title of class of securities: Common Stock
(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: 1,967,914 ** see Note 1 ** ** Note 1 ** Dimensional Fund Advisors LP, an investment adviser registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to four investment companies registered under the Investment Company Act of 1940, and serves as investment manager or sub-adviser to certain other commingled funds, group trusts and separate accounts (such investment companies, trusts and accounts, collectively referred to as the "Funds"). In certain cases, subsidiaries of Dimensional Fund Advisors LP may act as an adviser or sub-adviser to certain Funds. In its role as investment advisor, sub-adviser and/or manager, Dimensional Fund Advisors LP or its subsidiaries (collectively, "Dimensional") may possess voting and/or investment power over the securities of the Issuer that are owned by the Funds, and may be deemed to be the beneficial owner of the shares of the Issuer held by the Funds. However, all securities reported in this schedule are owned by the Funds. Dimensional disclaims beneficial ownership of such securities. In addition, the filing of this Schedule 13G shall not be construed as an admission that the reporting person or any of its affiliates is the beneficial owner of any securities covered by this Schedule 13G for any other purposes than Section 13(d) of the Securities Exchange Act of 1934.
(b)	Percent of class: 4.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,922,611** see Note 1 **
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,967,914** see Note 1 **
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Funds described in Note 1 above have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the securities held in their respective accounts. To the knowledge of Dimensional, the interest of any one such Fund does not exceed 5% of the class of securities. Dimensional Fund Advisors LP disclaims beneficial ownership of all such securities.
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 acquired and are held in the ordinary course of business and 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.

Dimensional Fund Advisors LP

Signature:	Selwyn Notelovitz
Name/Title:	Global Chief Compliance Officer
Date:	07/14/2026