LYTIR

Company · HDSN

Hudson Technologies, Inc.

Name as listed on its exchange; filed with the SEC as HUDSON TECHNOLOGIES INC /NY.

Nasdaq's symbol directory lists HDSN on Nasdaq as “Hudson Technologies, Inc. - Common Stock”.

In the 12 months to Nov 8, 2026: insiders bought on 19 occasions ($7.9M); 1 filing by holders of 5% or more; 1 company report (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Insider purchases and sales, by month (last 12 months)Insider purchases: $7.9M in total; Insider sales: $0 in total.Jun: Insider purchases $1.2MJul: Insider purchases $4.1MAug: Insider purchases $582KSep: Insider purchases $757KOct: Insider purchases $1.1MNov: Insider purchases $175KDecJanFebMarAprMayJunJulAugSepOctNov
Insider purchases above the line: $7.9MInsider sales below: $0
Dollar value of open-market purchases and sales reported on SEC Form 4, by the month traded. Sales include pre-arranged 10b5-1 plan sales.

Insider trades · SEC Form 4

Those inside the hall

Open-market purchases and sales only. Legs one person filed for one day are combined.

Who traded

  1. Hartree Partners, LP bought on 19 days latest Nov 2, 2026 bought $7.9M
Every trade (19)
  1. BUYHartree Partners, LP bought Nov 2, 2026 41,290 shares filing $175K
  2. BUYHartree Partners, LP bought Oct 30, 2026 58,710 shares filing $250K
  3. BUYHartree Partners, LP bought Oct 29, 2026 200,000 shares filing $889K
  4. BUYHartree Partners, LP bought Sep 24, 2026 118,549 shares filing $604K
  5. BUYHartree Partners, LP bought Sep 23, 2026 11,013 shares filing $56K
  6. BUYHartree Partners, LP bought Sep 21, 2026 2,502 shares filing $13K
  7. BUYHartree Partners, LP bought Sep 16, 2026 11,136 shares filing $57K
  8. BUYHartree Partners, LP bought Sep 2, 2026 5,317 shares filing $27K
  9. BUYHartree Partners, LP bought Aug 25, 2026 91,166 shares filing $501K
  10. BUYHartree Partners, LP bought Aug 24, 2026 9,446 shares filing $52K
  11. BUYHartree Partners, LP bought Aug 12, 2026 5,198 shares filing $29K
  12. BUYHartree Partners, LP bought Jul 29, 2026 52,104 shares filing $312K
  13. BUYHartree Partners, LP bought Jul 21, 2026 47,708 shares filing $286K
  14. BUYHartree Partners, LP bought Jul 20, 2026 17,842 shares filing $107K
  15. BUYHartree Partners, LP bought Jul 7, 2026 600 shares filing $4K
  16. BUYHartree Partners, LP bought Jul 6, 2026 4,634 shares filing $28K
  17. BUYHartree Partners, LP bought Jul 2, 2026 271,302 shares filing $1.6M
  18. BUYHartree Partners, LP bought Jul 1, 2026 288,111 shares filing $1.7M
  19. BUYHartree Partners, LP bought Jun 30, 2026 204,789 shares filing $1.2M

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. Hartree Partners, LP filed Jul 2, 2026 Schedule 13G/A passive filing 11.8%

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition filing Oct 28, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.