Cytosorbents Corp (CTSO) Insider Trading
Directors, officers and holders of more than 10% of CTSO report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 64 transactions on file: 10 with code P, 0 with code S and 40 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Chan Phillip P. | Chief Executive Officer | P Purchase | 3,774 | $6.00 | $22,644 |
| Sep 15, 2026 | Sobel Alan D. | Director | P Purchase | 100 | $6.01 | $601 |
| Sep 15, 2026 | Sobel Alan D. | Director | P Purchase | 500 | $6.05 | $3,025 |
| Sep 15, 2026 | Sobel Alan D. | Director | P Purchase | 1,900 | $6.12 | $11,628 |
| Sep 14, 2026 | Capponi Vincent | President and COO | P Purchase | 1,800 | $6.07 | $10,926 |
| Sep 14, 2026 | Capponi Vincent | President and COO | P Purchase | 273 | $5.90 | $1,611 |
| Sep 4, 2026 | Chan Phillip P. | Chief Executive Officer | P Purchase | 10,000 | $7.00 | $70,000 |
| Jun 15, 2026 | Chan Phillip P. | Chief Executive Officer | P Purchase | 517 | $8.60 | $4,443 |
| Jun 15, 2026 | MARIANI PETER J | Chief Financial Officer | P Purchase | 5,000 | $8.80 | $44,000 |
| Jun 12, 2026 | Chan Phillip P. | Chief Executive Officer | P Purchase | 12,557 | $8.00 | $100,454 |
| Nov 18, 2025 | Chan Phillip P. | Chief Executive Officer | A Award | 5,000 | $12.80 | $64,000 |
| Aug 8, 2025 | Capponi Vincent | President and COO | A Award | 4,455 | Not measured | Not measured |
| Aug 8, 2025 | MARIANI PETER J | Chief Financial Officer | A Award | 3,575 | Not measured | Not measured |
| Aug 8, 2025 | Deliargyris Efthymios | Chief Medical Officer | A Award | 3,500 | Not measured | Not measured |
| Aug 8, 2025 | Sobel Alan D. | Director | A Award | 22,000 | Not measured | Not measured |
| Aug 8, 2025 | Capponi Vincent | President and COO | A Award | 111,100 | Not measured | Not measured |
| Aug 8, 2025 | MARIANI PETER J | Chief Financial Officer | A Award | 90,000 | Not measured | Not measured |
| Aug 8, 2025 | Deliargyris Efthymios | Chief Medical Officer | A Award | 95,000 | Not measured | Not measured |
| Aug 8, 2025 | Kim Jiny | Director | A Award | 22,000 | Not measured | Not measured |
| Aug 8, 2025 | BATOR MICHAEL G. | Director | A Award | 44,000 | Not measured | Not measured |
| Aug 8, 2025 | Jones Edward Raymond | Director | A Award | 22,000 | Not measured | Not measured |
| Aug 8, 2025 | Chan Phillip P. | Chief Executive Officer | A Award | 136,400 | Not measured | Not measured |
| Aug 8, 2025 | Chan Phillip P. | Chief Executive Officer | A Award | 5,280 | Not measured | Not measured |
| Feb 24, 2025 | BATOR MICHAEL G. | Director | O Out-of-Term | 500 | $22.60 | $11,300 |
| Feb 24, 2025 | Capponi Vincent | President and COO | O Out-of-Term | 600 | $22.60 | $13,560 |
| Feb 24, 2025 | MARIANI PETER J | Chief Financial Officer | O Out-of-Term | 1,631 | $22.60 | $36,866 |
| Feb 24, 2025 | Chan Phillip P. | Chief Executive Officer | O Out-of-Term | 1,708 | $22.60 | $38,610 |
| Feb 24, 2025 | Sobel Alan D. | Director | O Out-of-Term | 1,098 | $22.60 | $24,803 |
| Feb 24, 2025 | BATOR MICHAEL G. | Director | O Out-of-Term | 15,879 | $1.13 | $17,943 |
| Feb 24, 2025 | Capponi Vincent | President and COO | O Out-of-Term | 12,000 | $1.13 | $13,560 |
| Feb 24, 2025 | MARIANI PETER J | Chief Financial Officer | O Out-of-Term | 32,625 | $1.13 | $36,866 |
| Feb 24, 2025 | Chan Phillip P. | Chief Executive Officer | O Out-of-Term | 34,168 | $1.13 | $38,610 |
| Feb 24, 2025 | Sobel Alan D. | Director | O Out-of-Term | 21,950 | $1.13 | $24,803 |
| Jan 17, 2025 | Capponi Vincent | President and COO | X In-the-Money | 1,588 | $20.00 | $31,760 |
| Jan 17, 2025 | MARIANI PETER J | Chief Financial Officer | J Other | 32,625 | Not measured | Not measured |
| Jan 17, 2025 | MARIANI PETER J | Chief Financial Officer | X In-the-Money | 1,631 | $20.00 | $32,625 |
| Jan 17, 2025 | MARIANI PETER J | Chief Financial Officer | J Other | 32,625 | Not measured | Not measured |
| Jan 17, 2025 | Chan Phillip P. | Chief Executive Officer | X In-the-Money | 4,542 | $20.00 | $90,832 |
| Jan 17, 2025 | Sobel Alan D. | Director | X In-the-Money | 1,098 | $20.00 | $21,950 |
| Jan 17, 2025 | Deliargyris Efthymios | Chief Medical Officer | X In-the-Money | 812 | $20.00 | $16,233 |
| Jan 17, 2025 | BATOR MICHAEL G. | Director | X In-the-Money | 794 | $20.00 | $15,879 |
| Jan 17, 2025 | BATOR MICHAEL G. | Director | X In-the-Money | 15,879 | Not measured | Not measured |
| Jan 17, 2025 | BATOR MICHAEL G. | Director | J Other | 15,879 | Not measured | Not measured |
| Jan 17, 2025 | BATOR MICHAEL G. | Director | J Other | 15,879 | Not measured | Not measured |
| Jan 17, 2025 | Capponi Vincent | President and COO | X In-the-Money | 31,760 | Not measured | Not measured |
| Jan 17, 2025 | Capponi Vincent | President and COO | J Other | 31,760 | Not measured | Not measured |
| Jan 17, 2025 | Capponi Vincent | President and COO | J Other | 31,760 | Not measured | Not measured |
| Jan 17, 2025 | Deliargyris Efthymios | Chief Medical Officer | X In-the-Money | 16,233 | Not measured | Not measured |
| Jan 17, 2025 | Deliargyris Efthymios | Chief Medical Officer | J Other | 16,233 | Not measured | Not measured |
| Jan 17, 2025 | Deliargyris Efthymios | Chief Medical Officer | J Other | 16,233 | Not measured | Not measured |
The full Form 4 history is on the CTSO company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.