Form4.ai tracks every SEC insider trade in real time. See every CTSO insider filing with a free account — no card.
See every CTSO insider filing — free account, no card.
Free accountCytosorbents Corp (CTSO) has 3 SEC Form 4 insider filings on record in the last 90 days. That includes 3 insider purchases totalling $105K. Most recent filing: Sept. 16, 2026.
Open-market value, last 90 days
Form 4 filings by type, last 90 days
| Date | Insider | Trade | Value | Price since buy |
|---|---|---|---|---|
| Sep 16, 2026 SEC filing | Chan Phillip P. Chief Executive Officer | Bought | $22,644 | -48.5% 30D |
| Sep 16, 2026 SEC filing | Capponi Vincent President and COO | Bought | $12,537 | -42.8% 30D |
| Sep 9, 2026 SEC filing | Chan Phillip P. Chief Executive Officer | Bought | $70,000 | -43.4% 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.