5 insiders reported 9 Form 4 transactions for Cytosorbents Corp (CTSO) over the past 18 months (most recent 2026-06-16). Recent activity: MARIANI PETER J (Chief Financial Officer) Buy 100,000 shares, Chan Phillip P. (Chief Executive Officer) Buy 251,136 shares, Chan Phillip P. (Chief Executive Officer) Buy 10,333 shares, Chan Phillip P. (Chief Executive Officer) Buy 100,000 shares, MARIANI PETER J (Chief Financial Officer) Buy 71,500 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-16 | MARIANI PETER J | Chief Financial Officer | Buy | 100,000 | $44,000 |
| 2026-06-15 | Chan Phillip P. | Chief Executive Officer | Buy | 251,136 | $100,454 |
| 2026-06-15 | Chan Phillip P. | Chief Executive Officer | Buy | 10,333 | $4,443 |
| 2025-11-20 | Chan Phillip P. | Chief Executive Officer | Buy | 100,000 | $64,000 |
| 2025-08-08 | MARIANI PETER J | Chief Financial Officer | Buy | 71,500 | $0 |
| 2025-08-08 | Capponi Vincent | President and COO | Buy | 89,100 | $0 |
| 2025-08-08 | Chan Phillip P. | Chief Executive Officer | Buy | 105,600 | $0 |
| 2025-08-08 | Deliargyris Efthymios | Chief Medical Officer | Buy | 70,000 | $0 |
| 2025-03-04 | BATOR MICHAEL G. | Director | Buy | 10,000 | $11,300 |
Source: SEC Form 4 filings · as of 2026-06-16