CTSO · Cytosorbents Corp · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“approximately $4.4 million in unrestricted cash and cash equivalents and $1.5 million of non-current restricted cash which may not be sufficient to fund the Company's operations beyond the next twelve months from the issuance of these condensed consolidated financial statements. These cash and restricted cash balances considered with our historical and expected future cash used in operations, notwithstanding our Strategic Workforce and Cost Reduction Plan and the impact of the Amended Loan and Security Agreement, raises substantial doubt about the Company's ability to continue as a going concern within twelve months after the date that the accompanying condensed consolidated financial statements are issued.”View the 10-Q filed Aug 6, 2026
Every disclosed holder of CTSO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns CTSO
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 796,918 | 25.36% |
| Insiders (Forms 3, 4, 5) | 222,724 | 7.09% |
| 13D/G-only blocks | 492,451 | 15.67% |
| Remaining | 1,630,044 | 51.88% |
| Registered funds (N-PORT, not summed) | 158,820 | 5.05% |
Shares outstanding: 3,142,137, the issuer's latest cover-page count restated onto today's split basis.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of CTSO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
AVENIR CORP
13F
CIK 1033475 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
259,461 | ||
| 2 |
|
199,943 | ||
| 3 |
Avenue Venture Opportunities Fund, L.P.
13G
CIK 1792691 · Unknown · Jun 26, 2024
Rule 13d-1(d), exempt investor
|
187,764 | ||
| 4 |
Granahan Investment Management, LLC
13G
CIK 1026710 · Registered investment adviser · Sep 30, 2024
Rule 13d-1(b), qualified institution
|
104,744 | ||
| 5 |
|
100,996 | ||
| 6 |
NEUBERGER BERMAN GROUP LLC
13F
CIK 1465109 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
98,435 | ||
| 6.1 |
Neuberger Intrinsic Value Fund
Fund
S000028676 · Registered fund · May 31, 2026
NEUBERGER BERMAN EQUITY FUNDS, not summed
|
32,326 | ||
| 7 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
95,703 | ||
| 8 |
CM Management, LLC
13F
CIK 1841857 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
73,825 | ||
| 9 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
63,718 | ||
| 10 |
Skylands Capital, LLC
13F
CIK 1299910 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
60,570 | ||
| 11 |
|
40,387 | ||
| 12 |
|
31,906 | ||
| 13 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
31,361 | ||
| 14 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
30,103 | ||
| 15 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
28,723 | ||
| 16 |
Sargent Investment Group, LLC
13F
CIK 1766157 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
27,788 | ||
| 17 |
Pathstone Holdings, LLC
13F
CIK 2011612 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
24,996 | ||
| 18 |
|
23,651 | ||
| 19 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
19,013 | ||
| 20 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
15,808 | ||
| 21 |
|
9,887 | ||
| 22 |
CIBC Bancorp USA Inc.
13F
CIK 1711924 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
8,632 | ||
| 23 |
|
7,965 | ||
| 24 |
|
7,564 | ||
| 25 |
OSAIC HOLDINGS, INC.
13F
CIK 1677044 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,742 | ||
| 26 |
|
6,551 | ||
| 27 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,583 | ||
| 28 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,381 | ||
| 29 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,001 | ||
| 30 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
4,716 | ||
| 31 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,567 | ||
| 32 |
|
4,442 | ||
| 33 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
3,929 | ||
| 34 |
|
3,891 | ||
| 35 |
Virtu Financial LLC
13F
CIK 1533964 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,575 | ||
| 36 |
XTX Topco Ltd
13F
CIK 1828301 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,716 | ||
| 37 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,610 | ||
| 38 |
LPL Financial LLC
13F
CIK 1403438 · Broker-dealer · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,506 | ||
| 39 |
STIFEL FINANCIAL CORP
13F
CIK 720672 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,400 | ||
| 40 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,934 | ||
| 41 |
VANGUARD BALANCED INDEX FUND
Fund
S000002560 · Registered fund · Jun 30, 2026
VANGUARD VALLEY FORGE FUNDS, not summed
|
1,782 | ||
| 42 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,606 | ||
| 43 |
Fidelity Nasdaq Composite Index Fund
Fund
S000055366 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
1,605 | ||
| 44 |
VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND
Fund
S000002855 · Registered fund · Jun 30, 2026
VANGUARD INSTITUTIONAL INDEX FUNDS, not summed
|
1,480 | ||
| 45 |
Kestra Advisory Services, LLC
13F
CIK 1830819 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,410 | ||
| 46 |
EP Wealth Advisors, LLC
13F
CIK 1540569 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,400 | ||
| 47 |
RITHOLTZ WEALTH MANAGEMENT
13F
CIK 1698218 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,372 | ||
| 48 |
Morgan Stanley Pathway Small-Mid Cap Equity ETF
Fund
S000088120 · Registered fund · May 31, 2026
MORGAN STANLEY PATHWAY FUNDS, not summed
|
1,088 | ||
| 49 |
SFMG, LLC
13F
CIK 1512026 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,000 | ||
| 50 |
Creative Planning
13F
CIK 1540235 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
948 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
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