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Phillip P. Chan - OfficerOpen-market purchase$23K
Vincent Capponi - OfficerOpen-market purchase$11K
About Cytosorbents Corp (CTSO)
The SEC lists Cytosorbents Corp under CIK 0001175151, in surgical and medical instruments and apparatus. It is grouped with Health Care companies on this site.
CTSO Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 7 | 208,347 | $120K |
CTSO insider transactions (Form 4)
3019 Form 4 filings on record, the earliest from Oct 8, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Phillip P. Chan - Officer | Open-market purchase | Common Stock | 3,774 footnote F1 | $6.00 | $23K | |
| ||||||
| Vincent Capponi - Officer | Open-market purchase | Common Stock | 1,800 footnote F1 | $6.07 | $11K | |
| Vincent Capponi - Officer | Open-market purchase | Common Stock | 273 footnote F1 | $5.90 | $2K | |
| ||||||
 Alan D. Sobel - Director | Open-market purchase | Common Stock | 1,900 | $6.12 | $12K | |
| Alan D. Sobel - Director | Open-market purchase | Common Stock | 500 | $6.05 | $3K | |
| Alan D. Sobel - Director | Open-market purchase | Common Stock | 100 | $6.01 | $601 | |
| Phillip P. Chan - Officer | Open-market purchase | Common Stock | 200,000 footnote F1 | $0.35 | $70K | |
| ||||||
 Peter J. Mariani - Officer | Open-market purchase | Common Stock | 100,000 footnote F1 | $0.44 | $44K | |
| ||||||
| Phillip P. Chan - Officer | Open-market purchase | Common Stock | 251,136 footnote F1 | $0.40 | $100K | |
| Phillip P. Chan - Officer | Open-market purchase | Common Stock | 10,333 footnote F4 | $0.43 | $4K | |
| ||||||
| Phillip P. Chan - Officer | Grant or award | Common Stock | 100,000 footnote F1 | $0.64 | $64K | |
| ||||||
| Edward Raymond Jones - Director | Grant or award | Stock Option (Right to Buy) | 22,000 | $0.00 | - | |
| Peter J. Mariani - Officer | Grant or award | Common Stock | 71,500 | $0.00 | - | |
| Peter J. Mariani - Officer | Grant or award | Stock Option (Right to Buy) | 90,000 | $0.00 | - | |
| Phillip P. Chan - Officer | Grant or award | Common Stock | 105,600 | $0.00 | - | |
| Phillip P. Chan - Officer | Grant or award | Stock Option (Right to Buy) | 136,400 | $0.00 | - | |
 Michael G. Bator - Director | Grant or award | Stock Option (Right to Buy) | 44,000 | $0.00 | - | |
 Jiny Kim - Director | Grant or award | Stock Option (Right to Buy) | 22,000 | $0.00 | - | |
 Efthymios Deliargyris - Officer | Grant or award | Common Stock | 70,000 | $0.00 | - | |
| Efthymios Deliargyris - Officer | Grant or award | Stock Option (Right to Buy) | 95,000 | $0.00 | - | |
| Vincent Capponi - Officer | Grant or award | Common Stock | 89,100 | $0.00 | - | |
| Vincent Capponi - Officer | Grant or award | Stock Option (Right to Buy) | 111,100 | $0.00 | - | |
| Alan D. Sobel - Director | Grant or award | Stock Option (Right to Buy) | 22,000 | $0.00 | - | |
| Peter J. Mariani - Officer | Open-market purchase | Common Stock | 20,000 | $0.96 | $19K | |
| Peter J. Mariani - Officer | Open-market purchase | Common Stock | 11,363 | $0.89 | $10K | |
| Peter J. Mariani - Officer | Open-market purchase | Common Stock | 20,000 | $0.89 | $18K | |
| Efthymios Deliargyris - Officer | Grant or award | Stock Option (Right to Buy) | 100,000 | - | - | |
| Efthymios Deliargyris - Officer | Grant or award | Stock Option (Right to Buy) | 50,000 | - | - | |
| Vincent Capponi - Officer | Grant or award | Stock Option (Right to Buy) | 100,000 | - | - | |
| Vincent Capponi - Officer | Grant or award | Stock Option (Right to Buy) | 50,000 | - | - | |
Item 7.01, 8.01, 9.01
Item 5.03, 9.01
Item 5.07
Item 7.01, 9.01
CTSO insider trading FAQ
What is the latest insider trade for CTSO?
Cytosorbents Corp (CTSO) had 4 insider filings in the last 90 days, with the most recent on 2026-09-16. The full record for CTSO runs to 19 Form 4 filings, the earliest from 2024-10-08. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying CTSO stock?
7 insider purchases of CTSO were filed in the last 90 days, totaling $120K.
How many insiders are selling CTSO stock?
No insider sales of CTSO were filed in the last 90 days.
Where can I see CTSO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects CTSO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Phillip P. Chan view on EDGAR
- - Vincent Capponi view on EDGAR
- - Alan D. Sobel view on EDGAR
- - Phillip P. Chan view on EDGAR
- - Peter J. Mariani view on EDGAR
- - Phillip P. Chan view on EDGAR
- - Phillip P. Chan view on EDGAR
- - Edward Raymond Jones view on EDGAR
- - Peter J. Mariani view on EDGAR
Related companies with recent insider activity
Learn more
- How to read insider buying signals
- What an open-market purchase by an insider can and cannot tell you.
- Insider activity in Health Care
- Where CTSO's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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