Key facts
- CTSO - Cytosorbents Corp has 11 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 11 Insiders of Cytosorbents Corp
- Symbol
- CTSO on Nasdaq
- Location
- Princeton, NJ
Change
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Research use
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 27 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Cytosorbents Corp executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Phillip P. Chan | Chief Executive Officer, Director | $949,096 | Mixed | 18 Nov 2025 | ||
| Vincent Capponi | President and COO | $766,268 | Mixed | 08 Aug 2025 | ||
| Kathleen P. Bloch | Chief Financial Officer | $708,812 | Mixed | 02 Apr 2024 | ||
| Peter J. Mariani | Chief Financial Officer | $538,113 | Mixed | 08 Aug 2025 | ||
| Efthymios Deliargyris | Chief Medical Officer | $473,025 | Mixed | 08 Aug 2025 | ||
| Alex D'Amico | Chief Financial Officer | $279,300 | Mixed | 07 Aug 2023 | ||
| Kraus al | Director | $188,921 | Mixed | 06 Feb 2023 | ||
| Michael G. Bator | Director | $151,273 | Mixed | 08 Aug 2025 | ||
| Alan D. Sobel | Director | $147,757 | Mixed | 08 Aug 2025 | ||
| Edward Raymond Jones | Director | $88,834 | Mixed | 08 Aug 2025 | ||
| Jiny Kim | Director | $77,819 | Mixed | 08 Aug 2025 |
Top shareholders of Cytosorbents Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| AVENIR CORP |
13D/G
13F
|
Company |
8.3%
|
5,230,099
|
$3,817,972 | +$1,559,392 | 31 Dec 2025 | |
| Thomas A. Satterfield Jr. |
13D/G
|
— |
6.6%
|
3,998,867
|
$4,638,686 | $0 | 13 Jan 2025 | |
| Avenue Venture Opportunities Fund, L.P. |
13D/G
|
Avenue Capital Management II, L.P. |
5.7%
|
3,755,273
|
$4,356,117 | $0 | 26 Jun 2024 | |
| Skylands Capital, LLC |
13D/G
13F
|
Company |
4.8%
|
3,002,702
|
$3,483,134 | +$256,453 | 31 Mar 2025 | |
| VANGUARD GROUP INC |
13D/G
|
The Vanguard Group |
3.1%
|
1,949,551
|
$2,261,479 | -$2,261,479 | 31 Mar 2025 | |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
|
Company |
3%
|
1,879,989
|
$1,064,074 | — | 31 Mar 2026 | |
| Neuberger Berman Group LLC |
13F
|
Company |
2.7%
|
1,683,007
|
$950,776 | — | 31 Mar 2026 | |
| CM Management, LLC |
13F
|
Company |
2.3%
|
1,476,500
|
$836,142 | — | 31 Mar 2026 | |
| BlackRock, Inc. |
13F
|
Company |
1.2%
|
782,992
|
$443,408 | — | 31 Mar 2026 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.1%
|
707,262
|
$400,621 | — | 31 Mar 2026 | |
| Sargent Investment Group, LLC |
13F
|
Company |
0.87%
|
549,900
|
$311,408 | — | 31 Mar 2026 | |
| Pathstone Holdings, LLC |
13F
|
Company |
0.79%
|
499,955
|
$283,124 | — | 31 Mar 2026 | |
| VANGUARD FIDUCIARY TRUST CO |
13F
|
Company |
0.5%
|
313,856
|
$177,642 | — | 31 Mar 2026 | |
| CIBC Bancorp USA Inc. |
13F
|
Company |
0.27%
|
172,649
|
$97,771 | — | 31 Mar 2026 | |
| STATE STREET CORP |
13F
|
Company |
0.25%
|
159,293
|
$90,208 | — | 31 Mar 2026 | |
| OSAIC HOLDINGS, INC. |
13F
|
Company |
0.21%
|
130,419
|
$74,245 | — | 31 Mar 2026 | |
| UBS Group AG |
13F
|
Company |
0.18%
|
115,200
|
$65,203 | — | 31 Mar 2026 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.17%
|
107,751
|
$61,020 | — | 31 Mar 2026 | |
| NWF Advisory Services Inc. |
13F
|
Company |
0.17%
|
104,139
|
$58,974 | — | 31 Mar 2026 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.16%
|
100,720
|
$57,038 | — | 31 Mar 2026 | |
| MORGAN STANLEY |
13F
|
Company |
0.16%
|
100,169
|
$56,726 | — | 31 Mar 2026 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.15%
|
92,540
|
$52,406 | — | 31 Mar 2026 | |
| Key Client Fiduciary Advisors, LLC |
13F
|
Company |
0.12%
|
78,457
|
$44,430 | — | 31 Mar 2026 | |
| Waverly Advisors, LLC |
13F
|
Company |
0.09%
|
55,556
|
$31,461 | — | 31 Mar 2026 | |
| STIFEL FINANCIAL CORP |
13F
|
Company |
0.08%
|
48,000
|
$27,183 | — | 31 Mar 2026 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.07%
|
43,947
|
$24,887 | — | 31 Mar 2026 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.06%
|
39,123
|
$22,143 | — | 31 Mar 2026 | |
| XTX Topco Ltd |
13F
|
Company |
0.06%
|
35,570
|
$20,143 | — | 31 Mar 2026 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.05%
|
29,945
|
$16,958 | — | 31 Mar 2026 | |
| Kestra Advisory Services, LLC |
13F
|
Company |
0.04%
|
28,200
|
$15,970 | — | 31 Mar 2026 | |
| EP Wealth Advisors, LLC |
13F
|
Company |
0.04%
|
28,000
|
$15,856 | — | 31 Mar 2026 | |
| RITHOLTZ WEALTH MANAGEMENT |
13F
|
Company |
0.04%
|
27,443
|
$15,541 | — | 31 Mar 2026 | |
| LPL Financial LLC |
13F
|
Company |
0.04%
|
23,185
|
$13,130 | — | 31 Mar 2026 | |
| Creative Planning |
13F
|
Company |
0.03%
|
21,295
|
$12,059 | — | 31 Mar 2026 | |
| Seelaus Asset Management LLC |
13F
|
Company |
0.03%
|
16,300
|
$9,231 | — | 31 Mar 2026 | |
| Merit Financial Group, LLC |
13F
|
Company |
0.02%
|
15,297
|
$8,663 | — | 31 Mar 2026 | |
| FIRST NATIONAL BANK OF OMAHA |
13F
|
Company |
0.02%
|
15,225
|
$8,524 | — | 31 Mar 2026 | |
| HRT FINANCIAL LP |
13F
|
Company |
0.02%
|
14,113
|
$7,000 | — | 31 Mar 2026 | |
| Vanguard Global Advisers, LLC |
13F
|
Company |
0.02%
|
13,865
|
$7,848 | — | 31 Mar 2026 | |
| Texas Capital Bank Wealth Management Services Inc |
13F
|
Company |
0.02%
|
11,000
|
$6,229 | — | 31 Mar 2026 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.02%
|
10,799
|
$6,115 | — | 31 Mar 2026 | |
| MARATHON CAPITAL MANAGEMENT |
13F
|
Company |
0.02%
|
10,000
|
$5,663 | — | 31 Mar 2026 | |
| FIFTH THIRD BANCORP |
13F
|
Company |
0%
|
3,082
|
$1,746 | — | 31 Mar 2026 | |
| Rockefeller Capital Management L.P. |
13F
|
Company |
0%
|
1,861
|
$1,054 | — | 31 Mar 2026 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0%
|
372
|
$208 | — | 31 Mar 2026 | |
| Your Advocates Ltd., LLP |
13F
|
Company |
0%
|
250
|
$143 | — | 31 Mar 2026 | |
| WELLS FARGO & COMPANY/MN |
13F
|
Company |
0%
|
250
|
$142 | — | 31 Mar 2026 | |
| MAI Capital Management |
13F
|
Company |
0%
|
233
|
$132 | — | 31 Mar 2026 | |
| JONES FINANCIAL COMPANIES LLLP |
13F
|
Company |
0%
|
93
|
$55 | — | 31 Mar 2026 | |
| PNC FINANCIAL SERVICES GROUP, INC. |
13F
|
Company |
0%
|
31
|
$18 | — | 31 Mar 2026 |
Recent Insider Transactions by Companies or Individuals for Cytosorbents Corp
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Phillip P. Chan | CTSO | Common Stock | Award | 7.23% | 100,000 | 1,482,963 | 18 Nov 2025 | Direct | ||
| Phillip P. Chan | CTSO | Common Stock | Award | 8.27% | 105,600 | 1,382,963 | 08 Aug 2025 | Direct | ||
| Phillip P. Chan | CTSO | Stock Option (Right to Buy) | Award | 136,400 | 136,400 | 08 Aug 2025 | Direct | |||
| Edward Raymond Jones | CTSO | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 08 Aug 2025 | Direct | |||
| Michael G. Bator | CTSO | Stock Option (Right to Buy) | Award | 44,000 | 44,000 | 08 Aug 2025 | Direct | |||
| Peter J. Mariani | CTSO | Common Stock | Award | 15.3% | 71,500 | 538,113 | 08 Aug 2025 | Direct | ||
| Peter J. Mariani | CTSO | Stock Option (Right to Buy) | Award | 90,000 | 90,000 | 08 Aug 2025 | Direct | |||
| Jiny Kim | CTSO | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 08 Aug 2025 | Direct | |||
| Vincent Capponi | CTSO | Common Stock | Award | 13.2% | 89,100 | 766,268 | 08 Aug 2025 | Direct | ||
| Vincent Capponi | CTSO | Stock Option (Right to Buy) | Award | 111,100 | 111,100 | 08 Aug 2025 | Direct | |||
| Efthymios Deliargyris | CTSO | Common Stock | Award | 17.4% | 70,000 | 473,025 | 08 Aug 2025 | Direct | ||
| Efthymios Deliargyris | CTSO | Stock Option (Right to Buy) | Award | 95,000 | 95,000 | 08 Aug 2025 | Direct | |||
| Alan D. Sobel | CTSO | Stock Option (Right to Buy) | Award | 22,000 | 22,000 | 08 Aug 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.