As of November 6, 2026, Hudson Technologies Inc is a publicly traded company (Nasdaq: HDSN); its largest reported holder is Hartree Partners, LP, with 11.8% on Schedule 13G/A of July 2, 2026, then Westerly Capital Management, LLC (5.9%). The largest insider holding is Hartree Partners, LP, a 10% owner, with 5,648,517 shares (13.4% of shares outstanding), per Form 4 of November 2, 2026 (Schedule 13G/A, July 2, 2026).
Is this your company?
About to sign with, pay or invest in Hudson Technologies Inc? See the free Snapshot first.
Free to see. No signup.
Is Hudson Technologies Inc a real, registered company?
- Hudson Technologies Inc files with the SEC under CIK 925528 (its SEC filings).
- Its shares are listed under the ticker HDSN on Nasdaq (SEC company record).
- Incorporated in New York; business address in Pearl River, New York, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Hudson Technologies Inc in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Alan Sheriff (Form 8-K filed 2026-04-13). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Hartree Partners, LP (filed 2026-07-02).
Who are Hudson Technologies Inc's owners and officers?
Hudson Technologies Inc: incorporated in New York; business address in Pearl River, New York; industry Wholesale-Machinery, Equipment & Supplies (Schedule 13G/A, 2026-07-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-07-14 | Dimensional Fund Advisors LP | 4.7% |
| Schedule 13G/A, 2026-07-02 | Hartree Partners, LP | 11.8% |
| Schedule 13G, 2026-06-05 | Hartree Partners, LP | 9% |
| Schedule 13G, 2026-04-09 | Dimensional Fund Advisors LP | 5.1% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-17 | Westerly Capital Management, LLC | 5.9% |
| Schedule 13D, 2025-12-10 | Hartree Partners, LP | 8.7% |
Questions about who owns Hudson Technologies Inc
Who owns Hudson Technologies Inc?
On this page, 2 holders' latest ownership filings report 5% or more of Hudson Technologies Inc: Hartree Partners, LP (11.8%, Schedule 13G/A, filed 2026-07-02) and Westerly Capital Management, LLC (5.9%, Schedule 13G/A, filed 2026-02-17).
Who are the largest shareholders of Hudson Technologies Inc?
By the share each holder's latest filing reports, the largest holders of Hudson Technologies Inc on this page are Hartree Partners, LP (11.8%) and Westerly Capital Management, LLC (5.9%).
When did Hartree Partners, LP buy into Hudson Technologies Inc?
The filings give report dates, not purchase dates. The earliest filing from Hartree Partners, LP on this page is the Schedule 13D, filed 2025-12-10, reporting 8.7%; its latest, Schedule 13G/A filed 2026-07-02, reports 11.8%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Want the whole picture on Hudson Technologies Inc?
Example from a real report (our sample on Target): “In March 2026, Target announced a planned incremental $1 billion operating investment” Source: Target Corporation (press release)
A Full Report on Hudson Technologies Inc: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on Hudson Technologies Inc covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
14 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
A real finished report, first screen. Opens in a new tab.
| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-04-13 | Alan Sheriff | appointed |
Which insiders own Hudson Technologies Inc shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- Hartree Partners, LP, a 10% owner: 5,648,517 shares (13.4% of shares outstanding) (Form 4, 2026-11-02).
- Brian F. Coleman: 426,968 shares (1.0% of shares outstanding) (Form 4/A, 2025-12-15).
- , a director: 195,746 shares (0.47% of shares outstanding) (Form 4/A, 2026-05-21).
- , a director: 169,748 shares (0.40% of shares outstanding) (Form 4, 2025-11-18).
- , the senior vice president-sales and marketing: 158,618 shares (0.38% of shares outstanding) (Form 4, 2026-01-12).
Shares outstanding: 42,088,547 as of 2026-10-15, from the company's latest SEC cover page.
How much has Hudson Technologies Inc raised?
No fundraising or offering filing from Hudson Technologies Inc is on file with us.
Keep reading
More on Hudson Technologies Inc and the records around it.
Hudson Technologies Inc elsewhere on the record
- Leadership changes Apr 2026
Companies that share a holder
- WESTERLY CAPITAL MANAGEMENT, LLC also filed stake reports on 2 other companies: HARTE HANKS INC (Aug 2026), COMSCORE, INC. (Feb 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
Related pages
Filings, cases and notices link to their records. A not-found line names the records searched; it is not proof of absence.
Not for employment, credit, insurance or tenancy decisions.
Cite this page
https://mentionfox.com/who-owns/hudson-technologies