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Cytosorbents (CTSO)
NASDAQ
$0.51+$0.03 (+5.63%)
Price as of Jun 03, 2026 7:29 PM EDT- $30.8MMarket Cap
- -52.00%1-Year Change
- Medical DevicesIndustry
Cytosorbents (CTSO)
$0.51+$0.03 (+5.63%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
AVENIR CORP | 8.31% | 5.2M | -14,323 (-0.27%) | Mar 31, 2026 |
VANGUARD GROUP INC | 3.51% | 2.2M | 0 (0.00%) | Dec 31, 2025 |
N/A | 2.99% | 1.9M | +1.9M (+100.00%) | Mar 31, 2026 |
SKYLANDS CAPITAL, LLC | 2.72% | 1.7M | -147,017 (-8.61%) | Mar 31, 2026 |
NEUBERGER BERMAN GROUP LLC | 2.68% | 1.7M | +57,367 (+3.41%) | Mar 31, 2026 |
CM MANAGEMENT, LLC | 2.35% | 1.5M | 0 (0.00%) | Mar 31, 2026 |
GRANAHAN INVESTMENT MANAGEMENT INC/MA | 1.76% | 1.1M | -48,954 (-4.43%) | Dec 31, 2021 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 2.89% | 1.8M | +3,416 (+0.19%) | Mar 31, 2026 |
NEUBERGER BERMAN EQUITY FUNDS | 1.03% | 647,006 | -19,055 (-2.95%) | Feb 28, 2026 |
FIDELITY CONCORD STREET TRUST | 0.79% | 497,227 | +1,020 (+0.21%) | Feb 28, 2026 |
ROYCE FUND | 0.56% | 349,000 | 0 (0.00%) | Mar 31, 2026 |
FIDELITY SALEM STREET TRUST | 0.49% | 306,404 | 0 (0.00%) | Mar 31, 2026 |
Jacob Funds Inc. | 0.32% | 197,940 | 0 (0.00%) | Feb 28, 2026 |
iSHARES TRUST | 0.23% | 145,480 | +13,398 (+9.21%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions298.0M (80.79%)
- Mutual Funds54.2M (14.69%)
- Insiders16.7M (4.52%)
- Other0 (0.00%)
Insider Transactions
- 4.52% (16.7M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 0Number of InsiderSelling (last 12 months)
- $0.00Amount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Chan Phillip P. Chief Executive Officer | Award | Nov 18, 2025 | $64,000.00 | 100,000 | $0.64 | 1.5M |
Kim Jiny | Award | Aug 08, 2025 | $0.00 | 22,000 | $0.00 | 22,000 |
Chan Phillip P. Chief Executive Officer | Award | Aug 08, 2025 | $0.00 | 136,400 | $0.00 | 136,400 |
Deliargyris Efthymios Chief Medical Officer | Award | Aug 08, 2025 | $0.00 | 95,000 | $0.00 | 95,000 |
Sobel Alan D. | Award | Aug 08, 2025 | $0.00 | 22,000 | $0.00 | 22,000 |
Jones Edward Raymond | Award | Aug 08, 2025 | $0.00 | 22,000 | $0.00 | 22,000 |
Capponi Vincent President and COO | Award | Aug 08, 2025 | $0.00 | 111,100 | $0.00 | 111,100 |
Deliargyris Efthymios Chief Medical Officer | Award | Aug 08, 2025 | $0.00 | 70,000 | $0.00 | 473,025 |
Chan Phillip P. Chief Executive Officer | Award | Aug 08, 2025 | $0.00 | 105,600 | $0.00 | 1.4M |
Capponi Vincent President and COO | Award | Aug 08, 2025 | $0.00 | 89,100 | $0.00 | 766,268 |
Chan Phillip P. Chief Executive Officer | Out Of The Money | Feb 24, 2025 | $38,609.84 | 34,168 | $1.13 | 0 |
Sobel Alan D. | Out Of The Money | Feb 24, 2025 | $24,803.50 | 21,950 | $1.13 | 0 |
Chan Phillip P. Chief Executive Officer | Out Of The Money | Feb 24, 2025 | $38,609.84 | 34,168 | $1.13 | 1.3M |
Capponi Vincent President and COO | Out Of The Money | Feb 24, 2025 | $13,560.00 | 12,000 | $1.13 | 0 |
BATOR MICHAEL G. | Out Of The Money | Feb 24, 2025 | $17,943.27 | 15,879 | $1.13 | 0 |
Capponi Vincent President and COO | Out Of The Money | Feb 24, 2025 | $13,560.00 | 12,000 | $1.13 | 677,168 |
Sobel Alan D. | Out Of The Money | Feb 24, 2025 | $24,803.50 | 21,950 | $1.13 | 145,757 |
MARIANI PETER J Chief Financial Officer | Out Of The Money | Feb 24, 2025 | $36,866.25 | 32,625 | $1.13 | 0 |
BATOR MICHAEL G. | Out Of The Money | Feb 24, 2025 | $11,300.00 | 10,000 | $1.13 | 151,273 |
MARIANI PETER J Chief Financial Officer | Out Of The Money | Feb 24, 2025 | $36,866.25 | 32,625 | $1.13 | 466,613 |
Capponi Vincent President and COO | In The Money | Jan 17, 2025 | $0.00 | 31,760 | $0.00 | 0 |
MARIANI PETER J Chief Financial Officer | In The Money | Jan 17, 2025 | $0.00 | 32,625 | $0.00 | 0 |
Capponi Vincent President and COO | Other | Jan 17, 2025 | $0.00 | 31,760 | $0.00 | 31,760 |
Deliargyris Efthymios Chief Medical Officer | In The Money | Jan 17, 2025 | $0.00 | 16,233 | $0.00 | 0 |
Capponi Vincent President and COO | Other | Jan 17, 2025 | $0.00 | 31,760 | $0.00 | 31,760 |
MARIANI PETER J Chief Financial Officer | Other | Jan 17, 2025 | $0.00 | 32,625 | $0.00 | 32,625 |
Capponi Vincent President and COO | In The Money | Jan 17, 2025 | $31,760.00 | 31,760 | $1.00 | 665,168 |
BATOR MICHAEL G. | In The Money | Jan 17, 2025 | $0.00 | 15,879 | $0.00 | 0 |
MARIANI PETER J Chief Financial Officer | Other | Jan 17, 2025 | $0.00 | 32,625 | $0.00 | 32,625 |
Deliargyris Efthymios Chief Medical Officer | Other | Jan 17, 2025 | $0.00 | 16,233 | $0.00 | 16,233 |