Latest Period
Q1 2026
Security Snapshot
Cytosorbents Corp - Common Stock (CTSO) Institutional Ownership
CUSIP: 23283X206
13F Institutional Holders and Ownership History from Q4 2014 to Q1 2026
Institutions Reporting
49
Shares (Excl. Options)
16,471,130
Price
$0.57
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- Security type / class
- Equity / Common Stock
- Symbol
- CTSO on Nasdaq
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 16,471,130
- Total 13F value
- $9,323,981
- Portfolio coverage rank
- 0%
- Share change
- -216,142
- Value change
- -$138,258
- Number of holders
- 49
- Shares outstanding
- 63,013,241
- SEC-reported price per share
- $0.50
- Insider filing price
- $0.50
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- CTSO - Cytosorbents Corp - Common Stock is tracked under CUSIP 23283X206.
- 49 institutions reported positions in Q1 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 51 to 49 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $10,779,444 to $9,323,981.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 49 institutions filings for Q1 2026.
Security key
23283X206
Latest holder period
Q1 2026
13F holders
49
13D/G owners
5
CIK / CUSIP context first
Open Q1 2026 holders
CTSO full holder history
Cytosorbents Corp SEC filings
Cytosorbents Corp company facts
Cytosorbents Corp insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 23283X206:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
CTSO
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| AVENIR CORP | 8.3% | +43% | $3,817,972 | +$1,559,392 | 5,230,099 | +69% | AVENIR CORP | 31 Dec 2025 |
| SATTERFIELD THOMAS A JR | 6.6% | $4,638,686 | 3,998,867 | Thomas A. Satterfield, Jr. | 13 Jan 2025 | |||
| Avenue Venture Opportunities Fund, L.P. | 5.7% | $4,356,117 | 3,755,273 | Avenue Capital Management II, L.P. | 26 Jun 2024 | |||
| Skylands Capital, LLC | 4.8% | -6% | $3,483,134 | +$256,453 | 3,002,702 | +7.9% | Skylands Capital, LLC | 31 Mar 2025 |
| VANGUARD GROUP INC | 3.1% | -57% | $2,261,479 | -$2,261,479 | 1,949,551 | -50% | The Vanguard Group | 31 Mar 2025 |
As of 31 Mar 2026, 49 institutional investors reported holding 16,471,130 shares of Cytosorbents Corp - Common Stock (CTSO). This represents 26% of the company’s total 63,013,241 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
26%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| AVENIR CORP | 8.3% | 5,215,776 | -0.27% | 0.36% | $2,953,694 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3% | 1,879,989 | 0% | 0% | $1,064,074 |
| Skylands Capital, LLC | 2.7% | 1,707,498 | -7.9% | 0.13% | $966,956 |
| NEUBERGER BERMAN GROUP LLC | 2.7% | 1,683,007 | +3.5% | 0% | $950,776 |
| CM Management, LLC | 2.3% | 1,476,500 | 0% | 0.7% | $836,142 |
| BlackRock, Inc. | 1.2% | 782,992 | +1.6% | 0% | $443,408 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.1% | 707,262 | +17% | 0% | $400,621 |
| Sargent Investment Group, LLC | 0.87% | 549,900 | -10% | 0.04% | $311,408 |
| Pathstone Holdings, LLC | 0.79% | 499,955 | 0% | 0% | $283,124 |
| VANGUARD FIDUCIARY TRUST CO | 0.5% | 313,856 | 0% | 0% | $177,642 |
| CIBC Bancorp USA Inc. | 0.27% | 172,649 | 0% | $97,771 | |
| STATE STREET CORP | 0.25% | 159,293 | 0% | 0% | $90,208 |
| OSAIC HOLDINGS, INC. | 0.21% | 130,419 | 0% | 0% | $74,245 |
| UBS Group AG | 0.18% | 115,200 | -0.06% | 0% | $65,203 |
| RAYMOND JAMES FINANCIAL INC | 0.17% | 107,751 | -0.87% | 0% | $61,020 |
| NWF Advisory Services Inc. | 0.17% | 104,139 | 0% | 0.01% | $58,974 |
| RENAISSANCE TECHNOLOGIES LLC | 0.16% | 100,720 | +0.6% | 0% | $57,038 |
| MORGAN STANLEY | 0.16% | 100,169 | -14% | 0% | $56,726 |
| NORTHERN TRUST CORP | 0.15% | 92,540 | 0% | 0% | $52,406 |
| Key Client Fiduciary Advisors, LLC | 0.12% | 78,457 | 0% | 0.02% | $44,430 |
| Waverly Advisors, LLC | 0.09% | 55,556 | 0% | 0% | $31,461 |
| STIFEL FINANCIAL CORP | 0.08% | 48,000 | 0% | 0% | $27,183 |
| GOLDMAN SACHS GROUP INC | 0.07% | 43,947 | +22% | 0% | $24,887 |
| BANK OF AMERICA CORP /DE/ | 0.06% | 39,123 | +1.1% | 0% | $22,143 |
| XTX Topco Ltd | 0.06% | 35,570 | +20% | 0% | $20,143 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
46
Latest
Q1 2026
Rows shown
1-25 of 46
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 16,471,130 | $9,323,981 | -$138,258 | $0.57 | 49 |
| 2025 Q4 | 16,863,149 | $10,779,444 | +$313,470 | $0.64 | 51 |
| 2025 Q3 | 16,334,989 | $15,255,905 | -$76,176 | $0.93 | 48 |
| 2025 Q2 | 16,439,150 | $20,747,017 | -$475,512 | $1.28 | 43 |
| 2025 Q1 | 16,936,549 | $16,946,108 | +$1,621,898 | $1.00 | 47 |
| 2024 Q4 | 15,331,894 | $14,135,595 | -$1,258,331 | $0.91 | 49 |
| 2024 Q3 | 16,479,547 | $24,719,503 | -$163,841 | $1.50 | 52 |
| 2024 Q2 | 16,466,687 | $11,576,845 | -$649,269 | $0.70 | 44 |
| 2024 Q1 | 17,587,924 | $16,695,355 | -$483,723 | $0.95 | 48 |
| 2023 Q4 | 18,066,999 | $20,043,725 | +$3,216,187 | $1.11 | 52 |
| 2023 Q3 | 15,225,693 | $28,618,581 | -$152,760 | $1.88 | 52 |
| 2023 Q2 | 15,228,799 | $54,658,487 | +$137,905 | $3.59 | 58 |
| 2023 Q1 | 15,164,229 | $51,235,010 | +$1,680,617 | $3.37 | 57 |
| 2022 Q4 | 14,633,483 | $22,639,263 | -$45,975 | $1.55 | 47 |
| 2022 Q3 | 13,738,883 | $18,678,835 | -$1,556,761 | $1.36 | 51 |
| 2022 Q2 | 15,471,130 | $33,885,658 | -$6,118,886 | $2.19 | 68 |
| 2022 Q1 | 18,023,750 | $57,468,184 | +$256,084 | $3.19 | 81 |
| 2021 Q4 | 17,787,059 | $74,549,808 | -$8,090,953 | $4.19 | 89 |
| 2021 Q3 | 18,365,550 | $149,202,914 | +$6,984,615 | $8.12 | 93 |
| 2021 Q2 | 17,524,476 | $132,378,236 | -$233,053 | $7.55 | 97 |
| 2021 Q1 | 17,470,204 | $151,609,944 | -$1,998,575 | $8.68 | 91 |
| 2020 Q4 | 17,574,310 | $140,069,028 | +$3,065,684 | $7.97 | 89 |
| 2020 Q3 | 17,195,121 | $137,138,701 | +$46,357,178 | $7.98 | 94 |
| 2020 Q2 | 11,233,329 | $111,252,626 | +$14,117,068 | $9.90 | 89 |
| 2020 Q1 | 9,938,360 | $76,782,098 | +$8,994,470 | $7.73 | 79 |