CTSO
Cytosorbents Corporation$4.57+0.03 (+0.66%)Prev Close$4.54·MCap$18.1M·P/E—·Vol6.7K·Yield—
▲
Buys (12M)
6
$269.3K
▼
Sells (12M)
0
$0.00
◆
Net Activity
Net Buyer
$269.3K
●
Active Insiders
4
last 12 mo
Over the past 12 months, insider activity at Cytosorbents Corporation (CTSO) has been exclusively buying, with 6 insider purchases totaling $269.3K and 0 insider sales totaling $0.00. The most recent insider transaction was by Sobel Alan D. (director), who purchased $15.3K worth of shares on Sep 16, 2026. Cytosorbents Corporation operates in the Healthcare sector, within the Medical - Devices industry, with a market cap of $18.1M.
CTSO Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | Sobel Alan D. | director | Buy | 2,500 | $6.10 | $15.3K | 9,887+34% |
| Sep 16, 2026 | Chan Phillip P. | director, officer: Chief Executive Officer | Buy | 3,774 | $6.00 | $22.6K | 100,996 |
| Sep 16, 2026 | Capponi Vincent | officer: President and COO | Buy | 2,073 | $6.05 | $12.5K | 40,387 |
| Sep 9, 2026 | Chan Phillip P. | director, officer: Chief Executive Officer | Buy | 200,000 | $0.35 | $70.0K | 1,944,432 |
| Jun 16, 2026 | MARIANI PETER J | officer: Chief Financial Officer | Buy | 100,000 | $0.44 | $44.0K | 638,113 |
| Jun 15, 2026 | Chan Phillip P. | director, officer: Chief Executive Officer | Buy | 261,469 | $0.40 | $104.9K | 1,744,432 |
| Feb 24, 2025 | BATOR MICHAEL G. | Director | Sell | 10,000 | $1.13 | $11.3K | 0 |
| Feb 24, 2025 | Capponi Vincent | President and COO | Sell | 12,000 | $1.13 | $13.6K | 0 |
| Feb 24, 2025 | Chan Phillip P. | Chief Executive Officer | Sell | 34,168 | $1.13 | $38.6K | 0 |
| Feb 24, 2025 | MARIANI PETER J | Chief Financial Officer | Sell | 32,625 | $1.13 | $36.9K | 0 |
| Feb 24, 2025 | Sobel Alan D. | Director | Sell | 21,950 | $1.13 | $24.8K | 0 |
| Dec 16, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | 20,000 | $0.96 | $19.3K | 401,363 |
| Dec 13, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | 31,363 | $0.89 | $28.0K | 381,363 |
| Dec 15, 2023 | Jones Edward Raymond | Director | Buy | 7,519 | $1.33 | $10.0K | 88,834 |
| Dec 15, 2023 | Kim Jiny | Director | Buy | 7,519 | $1.33 | $10.0K | 77,819 |
| Dec 15, 2023 | Sobel Alan D. | Director | Buy | 22,557 | $1.33 | $30.0K | 101,857+28% |
| Dec 15, 2023 | BATOR MICHAEL G. | Director | Buy | 37,594 | $1.33 | $50.0K | 125,394+43% |
| Dec 15, 2023 | BLOCH KATHLEEN P. | Chief Financial Officer | Buy | 37,594 | $1.33 | $50.0K | 467,941 |
| Dec 15, 2023 | Capponi Vincent | President & COO | Buy | 18,797 | $1.33 | $25.0K | 584,134 |
| Dec 15, 2023 | Chan Phillip P. | Chief Executive Officer | Buy | 75,188 | $1.33 | $100.0K | 1,068,704 |
| Dec 15, 2023 | Deliargyris Efthymios | Chief Medical Officer | Buy | 22,557 | $1.33 | $30.0K | 348,433 |
| Aug 8, 2023 | BATOR MICHAEL G. | Director | Buy | 3,000 | $3.19 | $9.6K | 87,800 |
| May 30, 2023 | BLOCH KATHLEEN P. | Interim CFO | Buy | 3,300 | $2.85 | $9.4K | 47,000 |
| May 12, 2023 | BLOCH KATHLEEN P. | Interim CFO | Buy | 10,000 | $3.11 | $31.1K | 43,700+30% |
| Dec 9, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 5,859 | $1.26 | $7.4K | 897,279 |
| Dec 8, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 24,141 | $1.26 | $30.5K | 891,420 |
| Sep 12, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 35,000 | $1.70 | $59.5K | 867,279 |
| Aug 26, 2022 | Kim Jiny | Director | Buy | 1,000 | $1.91 | $1.9K | 70,300 |
| Jun 22, 2022 | Capponi Vincent | President and COO | Buy | 2,000 | $1.80 | $3.6K | 443,545 |
| Jun 21, 2022 | Capponi Vincent | See Remarks | Buy | 3,000 | $2.00 | $6.0K | 441,545 |
| Jun 21, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 2,221 | $1.85 | $4.1K | 768,351 |
| Jun 10, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 16,000 | $2.17 | $34.8K | 766,130 |
| Jun 6, 2022 | BLOCH KATHLEEN P. | Chief Financial Officer | Buy | 8,700 | $1.90 | $16.5K | 33,700+35% |
| May 25, 2022 | Capponi Vincent | President and COO | Buy | 5,000 | $2.03 | $10.2K | 438,545 |
| May 19, 2022 | BATOR MICHAEL G. | Director | Buy | 5,000 | $2.19 | $11.0K | 84,800 |
| May 17, 2022 | Jones Edward Raymond | Director | Buy | 1,676 | $2.24 | $3.7K | 81,315 |
| May 12, 2022 | Sobel Alan D. | Director | Buy | 10,000 | $2.02 | $20.2K | 79,300 |
| May 9, 2022 | Kraus Al | Director | Buy | 5,000 | $1.96 | $9.8K | 130,046 |
| Jan 3, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 15,000 | $4.05 | $60.7K | 768,443 |
| Dec 13, 2021 | Chan Phillip P. | Chief Executive Officer | Buy | 5,000 | $5.25 | $26.3K | 753,443 |
| Nov 26, 2021 | BLOCH KATHLEEN P. | Chief Financial Officer | Buy | 4,000 | $4.98 | $19.9K | 25,000 |
| Sep 2, 2021 | Kraus Al | Director | Sell | 4,000 | $9.40 | $37.6K | 125,046 |
CTSO Insider Buying Activity
The following table shows recent insider purchases of Cytosorbents Corporation (CTSO) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | Sobel Alan D. | director | Buy | 2,500 | $6.10 | $15.3K | 9,887+34% |
| Sep 16, 2026 | Chan Phillip P. | director, officer: Chief Executive Officer | Buy | 3,774 | $6.00 | $22.6K | 100,996 |
| Sep 16, 2026 | Capponi Vincent | officer: President and COO | Buy | 2,073 | $6.05 | $12.5K | 40,387 |
| Sep 9, 2026 | Chan Phillip P. | director, officer: Chief Executive Officer | Buy | 200,000 | $0.35 | $70.0K | 1,944,432 |
| Jun 16, 2026 | MARIANI PETER J | officer: Chief Financial Officer | Buy | 100,000 | $0.44 | $44.0K | 638,113 |
| Jun 15, 2026 | Chan Phillip P. | director, officer: Chief Executive Officer | Buy | 261,469 | $0.40 | $104.9K | 1,744,432 |
| Dec 16, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | 20,000 | $0.96 | $19.3K | 401,363 |
| Dec 13, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | 31,363 | $0.89 | $28.0K | 381,363 |
| Dec 15, 2023 | Jones Edward Raymond | Director | Buy | 7,519 | $1.33 | $10.0K | 88,834 |
| Dec 15, 2023 | Kim Jiny | Director | Buy | 7,519 | $1.33 | $10.0K | 77,819 |
| Dec 15, 2023 | Sobel Alan D. | Director | Buy | 22,557 | $1.33 | $30.0K | 101,857+28% |
| Dec 15, 2023 | BATOR MICHAEL G. | Director | Buy | 37,594 | $1.33 | $50.0K | 125,394+43% |
| Dec 15, 2023 | BLOCH KATHLEEN P. | Chief Financial Officer | Buy | 37,594 | $1.33 | $50.0K | 467,941 |
| Dec 15, 2023 | Capponi Vincent | President & COO | Buy | 18,797 | $1.33 | $25.0K | 584,134 |
| Dec 15, 2023 | Chan Phillip P. | Chief Executive Officer | Buy | 75,188 | $1.33 | $100.0K | 1,068,704 |
| Dec 15, 2023 | Deliargyris Efthymios | Chief Medical Officer | Buy | 22,557 | $1.33 | $30.0K | 348,433 |
| Aug 8, 2023 | BATOR MICHAEL G. | Director | Buy | 3,000 | $3.19 | $9.6K | 87,800 |
| May 30, 2023 | BLOCH KATHLEEN P. | Interim CFO | Buy | 3,300 | $2.85 | $9.4K | 47,000 |
| May 12, 2023 | BLOCH KATHLEEN P. | Interim CFO | Buy | 10,000 | $3.11 | $31.1K | 43,700+30% |
| Dec 9, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 5,859 | $1.26 | $7.4K | 897,279 |
| Dec 8, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 24,141 | $1.26 | $30.5K | 891,420 |
| Sep 12, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 35,000 | $1.70 | $59.5K | 867,279 |
| Aug 26, 2022 | Kim Jiny | Director | Buy | 1,000 | $1.91 | $1.9K | 70,300 |
| Jun 22, 2022 | Capponi Vincent | President and COO | Buy | 2,000 | $1.80 | $3.6K | 443,545 |
| Jun 21, 2022 | Capponi Vincent | See Remarks | Buy | 3,000 | $2.00 | $6.0K | 441,545 |
| Jun 21, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 2,221 | $1.85 | $4.1K | 768,351 |
| Jun 10, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 16,000 | $2.17 | $34.8K | 766,130 |
| Jun 6, 2022 | BLOCH KATHLEEN P. | Chief Financial Officer | Buy | 8,700 | $1.90 | $16.5K | 33,700+35% |
| May 25, 2022 | Capponi Vincent | President and COO | Buy | 5,000 | $2.03 | $10.2K | 438,545 |
| May 19, 2022 | BATOR MICHAEL G. | Director | Buy | 5,000 | $2.19 | $11.0K | 84,800 |
| May 17, 2022 | Jones Edward Raymond | Director | Buy | 1,676 | $2.24 | $3.7K | 81,315 |
| May 12, 2022 | Sobel Alan D. | Director | Buy | 10,000 | $2.02 | $20.2K | 79,300 |
| May 9, 2022 | Kraus Al | Director | Buy | 5,000 | $1.96 | $9.8K | 130,046 |
| Jan 3, 2022 | Chan Phillip P. | Chief Executive Officer | Buy | 15,000 | $4.05 | $60.7K | 768,443 |
| Dec 13, 2021 | Chan Phillip P. | Chief Executive Officer | Buy | 5,000 | $5.25 | $26.3K | 753,443 |
| Nov 26, 2021 | BLOCH KATHLEEN P. | Chief Financial Officer | Buy | 4,000 | $4.98 | $19.9K | 25,000 |
CTSO Insider Selling Activity
The following table shows recent insider sales of Cytosorbents Corporation (CTSO) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Feb 24, 2025 | BATOR MICHAEL G. | Director | Sell | 10,000 | $1.13 | $11.3K | 0 |
| Feb 24, 2025 | Capponi Vincent | President and COO | Sell | 12,000 | $1.13 | $13.6K | 0 |
| Feb 24, 2025 | Chan Phillip P. | Chief Executive Officer | Sell | 34,168 | $1.13 | $38.6K | 0 |
| Feb 24, 2025 | MARIANI PETER J | Chief Financial Officer | Sell | 32,625 | $1.13 | $36.9K | 0 |
| Feb 24, 2025 | Sobel Alan D. | Director | Sell | 21,950 | $1.13 | $24.8K | 0 |
| Sep 2, 2021 | Kraus Al | Director | Sell | 4,000 | $9.40 | $37.6K | 125,046 |
CTSO Insiders
Chan Phillip P.
director, officer: Chief Executive Officer
Bought $520.8KSold $38.6K
12 tradesLast: Sep 16, 2026
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