Cytosorbents Ownership | Who Owns Cytosorbents?
Cytosorbents Ownership Summary
Cytosorbents is owned by 24.36% institutional investors, 14.85% insiders, and 60.79% retail investors. Avenir is the largest institutional shareholder, holding 8.38% of CTSO shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.08% of its assets in Cytosorbents shares.
CTSO Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Cytosorbents | 24.36% | 14.85% | 60.79% |
| Sector | Healthcare Stocks | 35.58% | 11.87% | 52.55% |
| Industry | Medical Device Stocks | 35.88% | 10.92% | 53.20% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Avenir | 5.22M | 8.38% | $2.95M |
| Vanguard group | 2.20M | 3.51% | $1.41M |
| Skylands capital | 1.71M | 2.74% | $966.96K |
| Neuberger berman group | 1.68M | 2.70% | $950.78K |
| Cm management | 1.48M | 2.37% | $836.14K |
| Blackrock funding, inc. /de | 782.99K | 1.26% | $443.41K |
| Blackrock | 655.80K | 1.21% | $461.03K |
| Geode capital management | 707.26K | 1.14% | $400.62K |
| Sargent investment group | 549.90K | 0.88% | $311.41K |
| Pathstone | 499.95K | 0.80% | $283.12K |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Cm management | 1.48M | 0.70% | $836.14K |
| Avenir | 5.22M | 0.36% | $2.95M |
| Skylands capital | 1.71M | 0.13% | $966.96K |
| Sargent investment group | 549.90K | 0.04% | $311.41K |
| Key client fiduciary advisors | 78.46K | 0.02% | $44.43K |
| Seelaus asset management | 16.30K | 0.01% | $9.23K |
| Nwf advisory services | 104.14K | 0.01% | $58.97K |
| Two sigma securities | 15.74K | 0.00% | $14.70K |
| Marathon capital management | 10.00K | 0.00% | $5.66K |
| Pathstone | 499.95K | 0.00% | $283.12K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Vanguard fiduciary trust | 313.86K | - | 313.86K |
| Geode capital management | 707.26K | - | 103.50K |
| Neuberger berman group | 1.68M | 0.00% | 57.37K |
| Ritholtz wealth management | 27.44K | 0.00% | 27.44K |
| Two sigma securities | 15.74K | 0.00% | 15.74K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Granahan investment management | - | - | -358.42K |
| Gsa capital partners llp | - | - | -148.37K |
| Skylands capital | 1.71M | 0.13% | -147.02K |
| Citadel advisors | 10.80K | - | -138.48K |
| Amh equity | - | - | -82.80K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Vanguard fiduciary trust | 313.86K | - | 313.86K | $177.64K |
| Ritholtz wealth management | 27.44K | 0.00% | 27.44K | $15.54K |
| Hrt financial lp | 14.11K | - | 14.11K | $7.00K |
| Vanguard global advisers | 13.87K | - | 13.87K | $7.85K |
| Marathon capital management | 10.00K | 0.00% | 10.00K | $5.66K |
Sold Out
| Holder | Change |
|---|---|
| Qube research | -1.00 |
| Allworth financial lp | -37.00 |
| Fmr | -384.00 |
| Lazard asset management | -1.09K |
| New wave wealth advisors | -1.63K |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 38 | -25.49% | 15,158,722 | -10.11% | 24 | 3.37% | 15 | -34.78% | 9 | -10.00% |
| Dec 31, 2025 | 38 | -22.45% | 16,197,322 | -1.88% | 25 | 3.71% | 17 | -22.73% | 8 | -20.00% |
| Sep 30, 2025 | 48 | 9.09% | 16,334,989 | -0.63% | 26 | 3.78% | 22 | 100.00% | 10 | -44.44% |
| Jun 30, 2025 | 42 | -14.29% | 16,329,093 | -3.59% | 26 | 3.35% | 11 | -52.17% | 18 | 80.00% |
| Mar 31, 2025 | 2 | -96.08% | 381,533 | -97.51% | - | 0.09% | 1 | -95.83% | 1 | -90.91% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 1.30M | 2.08% | - |
| Vanguard Total Stock Mkt Idx Inv | 1.27M | 2.03% | - |
| M&G (ACS) Granahan US Sm Cp Gr GBPZ1AAcc | 763.50K | 1.40% | -101.78K |
| Neuberger Berman Intrinsic Value I | 674.87K | 1.08% | - |
| Neuberger Intrinsic Value I | 647.01K | 1.03% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 576.77K | 0.92% | 36.38K |
| Fidelity Extended Market Index | 390.14K | 0.62% | 94.21K |
| iShares Micro-Cap ETF | 146.44K | 0.23% | - |
| JNL Multi-Manager Small Cap Growth A | 124.74K | 0.20% | -310.82K |
| BlackRock Extended Equity Market K | 103.38K | 0.19% | -44.00 |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Dec 13, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | $19.29K |
| Dec 12, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | $17.87K |
| Dec 11, 2024 | MARIANI PETER J | Chief Financial Officer | Buy | $10.10K |
| Dec 13, 2023 | Sobel Alan D. | - | Buy | $30.00K |
| Dec 13, 2023 | Sobel Alan D. | - | Buy | $15.79K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | - |
| 2025 Q3 | - | - |
| 2025 Q1 | - | - |
| 2024 Q4 | 3 | - |
| 2024 Q3 | - | - |
CTSO Ownership FAQ
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