Form4.ai tracks every SEC insider trade in real time. See every HDSN insider filing with a free account — no card.
See every HDSN insider filing — free account, no card.
Free accountHUDSON TECHNOLOGIES INC (HDSN) has 6 SEC Form 4 insider filings on record in the last 90 days. That includes 6 insider purchases totalling $1.3M. Most recent filing: Sept. 28, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Sep 28, 2026 SEC filing | Hartree Partners, LP 10% Owner | Bought | $604,446 | +5.3% 30D |
| Sep 23, 2026 SEC filing | Hartree Partners, LP 10% Owner | Bought | $68,924 | +5.1% 30D |
| Sep 18, 2026 SEC filing | Hartree Partners, LP 10% Owner | Bought | $56,794 | -1.2% 30D |
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Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.