Cytosorbents Crp
Ownership
Ownership Structure
Who owns Cytosorbents Crp (CTSO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 85.6% of the shares are freely tradable; institutional investors hold 26.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avenir Corporation | 8.30 | 5,215,776 | -0.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.99 | 1,879,989 | +0.0 | 03/31/2026 |
| Neuberger Berman Group LLC | 2.68 | 1,683,007 | +3.5 | 03/31/2026 |
| CM Management, LLC | 2.35 | 1,476,500 | +0.0 | 03/31/2026 |
| Skylands Capital, LLC | 1.93 | 1,211,400 | -29.1 | 06/30/2026 |
| BlackRock Inc | 1.25 | 782,992 | +1.6 | 03/31/2026 |
| Geode Capital Management, LLC | 1.13 | 707,262 | +17.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.03 | 1,274,363 | +0.0 | 07/31/2026 |
| Neuberger Intrinsic Value I | 1.03 | 646,511 | +0.0 | 07/31/2026 |
| Vanguard Institutional Extnd Mkt Idx Tr | 0.91 | 574,463 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Chan Phillip P. | Chief Executive Officer | 100,996 | 585,777 $ | Sep 15, 2026 | direct |
| Capponi Vincent | President and COO | 40,387 | 234,245 $ | Sep 14, 2026 | direct |
| Sobel Alan D. | Director | 9,887 | 57,345 $ | Sep 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Chan Phillip P. | Chief Executive Officer | Buy | 3,774 | 6.00 | 22,644 |
| Sep 15, 2026 | Sobel Alan D. | Director | Buy | 100 | 6.01 | 601 |
| Sep 15, 2026 | Sobel Alan D. | Director | Buy | 500 | 6.05 | 3,025 |
| Sep 15, 2026 | Sobel Alan D. | Director | Buy | 1,900 | 6.12 | 11,628 |
| Sep 14, 2026 | Capponi Vincent | President and COO | Buy | 273 | 5.90 | 1,611 |
| Sep 14, 2026 | Capponi Vincent | President and COO | Buy | 1,800 | 6.07 | 10,926 |
| Sep 4, 2026 | Chan Phillip P. | Chief Executive Officer | Buy | 200,000 | 0.35 | 70,000 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.