CTSO
Cytosorbents Corp
NASDAQ · Healthcare · Medical - Devices · US
$4.62
+1.76%7
Insider buys (3m)
0
Insider sells (3m)
$120.4K
Net value (3m)
-43.8%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Sep 16, 2026 | Sobel Alan D. · director | Purchase | 100 | $6.01 |
| Sep 16, 2026 | Capponi Vincent · officer: President and COO | Purchase | 1,800 | $6.07 |
| Sep 16, 2026 | Sobel Alan D. · director | Purchase | 500 | $6.05 |
| Sep 16, 2026 | Sobel Alan D. · director | Purchase | 1,900 | $6.12 |
| Sep 16, 2026 | Capponi Vincent · officer: President and COO | Purchase | 273 | $5.90 |
| Sep 16, 2026 | Chan Phillip P. · director, officer: Chief Executive Officer | Purchase | 3,774 | $6.00 |
| Sep 9, 2026 | Chan Phillip P. · director, officer: Chief Executive Officer | Purchase | 200,000 | $0.35 |
| Jun 16, 2026 | MARIANI PETER J · officer: Chief Financial Officer | Purchase | 100,000 | $0.44 |
| Jun 15, 2026 | Chan Phillip P. · director, officer: Chief Executive Officer | Purchase | 251,136 | $0.40 |
| Jun 15, 2026 | Chan Phillip P. · director, officer: Chief Executive Officer | Purchase | 10,333 | $0.43 |
| Nov 20, 2025 | Chan Phillip P. · director, officer: Chief Executive Officer | A-Award | 100,000 | $0.64 |
| Aug 8, 2025 | Deliargyris Efthymios · officer: Chief Medical Officer | A-Award | 95,000 | $1.00 |
| Aug 8, 2025 | Sobel Alan D. · director | A-Award | 22,000 | $1.00 |
| Aug 8, 2025 | Deliargyris Efthymios · officer: Chief Medical Officer | A-Award | 70,000 | $0.00 |
| Aug 8, 2025 | Capponi Vincent · officer: President and COO | A-Award | 89,100 | $0.00 |
| Aug 8, 2025 | Kim Jiny · director | A-Award | 22,000 | $1.00 |
| Aug 8, 2025 | BATOR MICHAEL G. · director | A-Award | 44,000 | $1.00 |
| Aug 8, 2025 | MARIANI PETER J · officer: Chief Financial Officer | A-Award | 90,000 | $1.00 |
| Aug 8, 2025 | Chan Phillip P. · director, officer: Chief Executive Officer | A-Award | 105,600 | $0.00 |
| Aug 8, 2025 | Chan Phillip P. · director, officer: Chief Executive Officer | A-Award | 136,400 | $1.00 |
| Aug 8, 2025 | MARIANI PETER J · officer: Chief Financial Officer | A-Award | 71,500 | $0.00 |
| Aug 8, 2025 | Capponi Vincent · officer: President and COO | A-Award | 111,100 | $1.00 |
| Aug 8, 2025 | Jones Edward Raymond · director | A-Award | 22,000 | $1.00 |
| Dec 16, 2024 | MARIANI PETER J · officer: Chief Financial Officer | Purchase | 20,000 | $0.96 |
| Dec 13, 2024 | MARIANI PETER J · officer: Chief Financial Officer | Purchase | 20,000 | $0.89 |
| Dec 13, 2024 | MARIANI PETER J · officer: Chief Financial Officer | Purchase | 11,363 | $0.89 |
| Oct 8, 2024 | Deliargyris Efthymios · officer: Chief Medical Officer | A-Award | 100,000 | $1.19 |
| Oct 8, 2024 | Capponi Vincent · officer: President and COO | A-Award | 50,000 | $1.19 |
| Oct 8, 2024 | Capponi Vincent · officer: President and COO | A-Award | 100,000 | $1.19 |
| Oct 8, 2024 | Deliargyris Efthymios · officer: Chief Medical Officer | A-Award | 50,000 | $1.19 |
Institutional positioning
13F filings over the trailing two quarters
New 14Increased 21Reduced 26Sold out 14
| Filer | Action | Shares | Filed |
|---|---|---|---|
| AVENIR CORP | Reduced | 5,215,776 | May 14, 2026 |
| AVENIR CORP | Reduced | 5,189,218 | Aug 13, 2026 |
| Neuberger Berman Group LLC | Increased | 1,968,691 | Oct 27, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 1,914,063 | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1,879,989 | May 15, 2026 |
| NEUBERGER BERMAN GROUP LLC | Increased | 1,683,007 | Oct 27, 2026 |
| NEUBERGER BERMAN GROUP LLC | Reduced | 1,679,628 | Oct 27, 2026 |
| NEUBERGER BERMAN GROUP LLC | Increased | 1,625,640 | Oct 27, 2026 |
| NEUBERGER BERMAN GROUP LLC | Increased | 1,597,998 | Oct 27, 2026 |
| NEUBERGER BERMAN GROUP LLC | Reduced | 1,591,689 | Oct 27, 2026 |
| CM Management, LLC | Unchanged | 1,476,500 | Aug 13, 2026 |
| CM MANAGEMENT, LLC | Unchanged | 1,476,500 | May 8, 2026 |
| Skylands Capital, LLC | Reduced | 1,211,400 | Jul 24, 2026 |
| BLACKROCK, INC. | Increased | 782,992 | May 13, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 707,262 | May 15, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Sep 16, 2026