CYTOSORBENTS CORP (CTSO) Top Institutional Shareholders
CYTOSORBENTS CORP (CTSO) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $9.32M in CTSO holdings during the latest filing period.
Avenir Corp is currently the largest disclosed institutional shareholder of CTSO tracked by InsiderSet, reporting ownership valued at approximately $2.95M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.49M, representing an estimated loss of -15.77% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 90% of the total disclosed CTSO value among the investors covered in this analysis. Major shareholders include Avenir Corp, Vanguard Capital Management Llc, Skylands Capital, Llc, and several other long-term asset managers with concentrated positions in CYTOSORBENTS CORP (CTSO).
This page ranks the largest institutional CTSO shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
50
Total Reported Value
$9.32M
Largest Holder
Avenir Corp
Largest Position
$2.95M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
57
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Avenir Corp | 0.36% | 5,215,776 | $2,953,694 | $2,487,925 | -$465,769 | -15.77% | |
| Vanguard Capital Management Llc | 0.00% | 1,879,989 | $1,064,074 | $896,755 | -$167,319 | -15.72% | |
| Skylands Capital, Llc | 0.13% | 1,707,498 | $966,956 | $814,477 | -$152,479 | -15.77% | |
| Neuberger Berman Group Llc | 0.00% | 1,683,007 | $950,776 | $802,794 | -$147,982 | -15.56% | |
| Cm Management, Llc | 0.70% | 1,476,500 | $836,142 | $704,291 | -$131,852 | -15.77% | |
| Blackrock, Inc. | 0.00% | 782,992 | $443,408 | $373,487 | -$69,921 | -15.77% | |
| Geode Capital Management, Llc | 0.00% | 707,262 | $400,621 | $337,364 | -$63,257 | -15.79% | |
| Sargent Investment Group, Llc | 0.04% | 549,900 | $311,408 | $262,302 | -$49,106 | -15.77% | |
| Pathstone Holdings, Llc | 0.00% | 499,955 | $283,124 | $238,479 | -$44,645 | -15.77% | |
| Vanguard Fiduciary Trust Co | 0.00% | 313,856 | $177,642 | $149,709 | -$27,933 | -15.72% | |
| Cibc Bancorp Usa Inc. | 0.00% | 172,649 | $97,771 | $82,354 | -$15,417 | -15.77% | |
| State Street Corp | 0.00% | 159,293 | $90,208 | $75,983 | -$14,225 | -15.77% | |
| Osaic Holdings, Inc. | 0.00% | 130,419 | $74,245 | $62,210 | -$12,035 | -16.21% | |
| Ubs Group Ag | 0.00% | 115,200 | $65,203 | $54,950 | -$10,253 | -15.72% | |
| Raymond James Financial Inc | 0.00% | 107,751 | $61,020 | $51,397 | -$9,623 | -15.77% | |
| Nwf Advisory Services Inc. | 0.01% | 104,139 | $58,974 | $49,674 | -$9,300 | -15.77% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 100,720 | $57,038 | $48,043 | -$8,995 | -15.77% |
| Morgan Stanley | 0.00% | 100,169 | $56,726 | $47,781 | -$8,945 | -15.77% | |
| Northern Trust Corp | 0.00% | 92,540 | $52,406 | $44,142 | -$8,264 | -15.77% | |
| Key Client Fiduciary Advisors, Llc | 0.02% | 78,457 | $44,430 | $37,424 | -$7,006 | -15.77% | |
| Waverly Advisors, Llc | 0.00% | 55,556 | $31,461 | $26,500 | -$4,961 | -15.77% | |
| Stifel Financial Corp | 0.00% | 48,000 | $27,183 | $22,896 | -$4,287 | -15.77% | |
| Goldman Sachs Group Inc | 0.00% | 43,947 | $24,887 | $20,963 | -$3,924 | -15.77% | |
| Bank Of America Corp | 0.00% | 39,123 | $22,143 | $18,662 | -$3,481 | -15.72% | |
| Xtx Topco Ltd | 0.00% | 35,570 | $20,143 | $16,967 | -$3,176 | -15.77% | |
| Susquehanna International Group, Llp | 0.00% | 29,945 | $16,958 | $14,284 | -$2,674 | -15.77% | |
| Kestra Advisory Services, Llc | 0.00% | 28,200 | $15,970 | $13,451 | -$2,519 | -15.77% | |
| Ep Wealth Advisors, Llc | 0.00% | 28,000 | $15,856 | $13,356 | -$2,500 | -15.77% | |
| Ritholtz Wealth Management | 0.00% | 27,443 | $15,541 | $13,090 | -$2,451 | -15.77% | |
| Lpl Financial Llc | 0.00% | 23,185 | $13,130 | $11,059 | -$2,071 | -15.77% | |
| Creative Planning | 0.00% | 21,295 | $12,059 | $10,158 | -$1,901 | -15.77% | |
| Seelaus Asset Management Llc | 0.01% | 16,300 | $9,231 | $7,775 | -$1,456 | -15.77% | |
| Merit Financial Group, Llc | 0.00% | 15,297 | $8,663 | $7,297 | -$1,366 | -15.77% | |
| First National Bank Of Omaha | 0.00% | 15,225 | $8,524 | $7,262 | -$1,262 | -14.80% | |
| Vanguard Global Advisers, Llc | 0.00% | 13,865 | $7,848 | $6,614 | -$1,234 | -15.73% | |
| Texas Capital Bank Wealth Management Services Inc | 0.00% | 11,000 | $6,229 | $5,247 | -$982 | -15.76% | |
| Citadel Advisors Llc | 0.00% | 10,799 | $6,115 | $5,151 | -$964 | -15.76% | |
| Marathon Capital Management | 0.00% | 10,000 | $5,663 | $4,770 | -$893 | -15.77% | |
| Fifth Third Bancorp | 0.00% | 3,082 | $1,746 | $1,470 | -$276 | -15.80% | |
| Rockefeller Capital Management L.P. | 0.00% | 1,861 | $1,054 | $888 | -$166 | -15.78% | |
| Medallion Wealth Advisors, Llc | 0.00% | 225 | $215 | $107 | -$108 | -50.08% | |
| Your Advocates Ltd., Llp | 0.00% | 250 | $143 | $119 | -$24 | -16.61% | |
| Wells Fargo & Company/Mn | 0.00% | 250 | $142 | $119 | -$23 | -16.02% | |
| Mai Capital Management | 0.00% | 233 | $132 | $111 | -$21 | -15.80% | |
| Jones Financial Companies Lllp | 0.00% | 93 | $55 | $44 | -$11 | -19.34% | |
| Pnc Financial Services Group, Inc. | 0.00% | 31 | $18 | $15 | -$3 | -17.85% | |
| Bnp Paribas Financial Markets | 0.00% | 17 | $10 | $8 | -$2 | -18.91% | |
| Hrt Financial Lp | 0.00% | 14,113 | $7 | $6,732 | +$6,725 | +96070.01% | |
| Farther Finance Advisors, Llc | 0.00% | 6 | $3 | $3 | -$0 | -4.60% | |
| Sbi Securities Co., Ltd. | 0.00% | 1 | $1 | $0 | -$1 | -52.30% |
Frequently asked questions about CTSO
Who owns the most CTSO stock?
The largest holders of CTSO are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for CYTOSORBENTS CORP (CTSO).
Is CTSO widely held by superinvestors?
Many widely followed stocks like CTSO appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CTSO is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.