Cytosorbents Corp (CTSO) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

0Shares Outstanding

789,837Shares held by institutions

$430,540Value of institutional holdings

26.90%Institutional ownership %

9.12%Shares Changed QoQ

44No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Cytosorbents Corp (NASDAQ:CTSO) appears in 50 institutional 13F filings for the quarter ending December 2025.

These investors collectively held 26.9% of Cytosorbents's outstanding shares in December 2025, up from 26.4% in September 2025.
They increased total shares held in CTSO by 3.25% quarter over quarter, and investors in Cytosorbents decreased 3.85% from a year ago.
Among the 50 funds, 22 bought more Cytosorbents shares, 14 sold down, and 14 held their ground.
Institutional investors collectively held 16.86Mn shares in Cytosorbents as of December 2025, up by 531.19K shares quarter on quarter, and up 1.08Mn shares year over year.
AVENIR CORP holds the largest position in CTSO at 5.23Mn shares as of December 31, 2025, or 8.33% of shares outstanding.
Leading buyers of Cytosorbents shares for the quarter ending December 2025 were Pathstone Holdings, LLC (499.96K), CM Management, LLC (188.37K), AVENIR CORP (147.26K), CITADEL ADVISORS LLC (83.59K), GSA CAPITAL PARTNERS LLP (36.16K).
The biggest sellers of Cytosorbents for the quarter ending December 2025 included Skylands Capital, LLC (272.75K), Sargent Investment Group, LLC (126.7K), Kestra Advisory Services, LLC (38.83K), Bank Of America Corp /De/ (38.7K), RENAISSANCE TECHNOLOGIES LLC (34.68K).
According to Business Quant data, leading holders of CTSO for December 2025 are AVENIR CORP (5.23Mn), VANGUARD GROUP INC (2.2Mn), Skylands Capital, LLC (1.85Mn), Neuberger Berman Group LLC (1.63Mn), CM Management, LLC (1.48Mn), BlackRock, Inc. (770.55K), Sargent Investment Group, LLC (612.0K), GEODE CAPITAL MANAGEMENT, LLC (603.77K), Pathstone Holdings, LLC (499.96K), CIBC Private Wealth Group LLC (172.65K).

50 Institutional Holders

789,837 Total Shares Held

Rows:

Download Data

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	5,742	0.75%	$0.00
AVENIR CORP	31 Dec, 2025	147,261	2.90%	$0.00
CM Management, LLC	31 Dec, 2025	188,372	14.62%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	4,132	413.20%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	0	0.00%	$0.00
Sargent Investment Group, LLC	31 Dec, 2025	-126,700	-17.15%	$0.00
Skylands Capital, LLC	31 Dec, 2025	-272,750	-12.82%	$0.00
Pathstone Holdings, LLC	31 Dec, 2025	499,955	0.00%	$0.00
Neuberger Berman Group LLC	31 Dec, 2025	27,642	1.73%	$0.00
OSAIC HOLDINGS, INC.	31 Dec, 2025	0	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	2,316	0.39%	$0.00
UBS Group AG	31 Dec, 2025	69	0.06%	$0.00
CIBC Private Wealth Group LLC	31 Dec, 2025	0	0.00%	$0.00
NWF Advisory Services Inc.	31 Dec, 2025	0	0.00%	$0.00
State Street Corp	31 Dec, 2025	0	0.00%	$0.00
Key Client Fiduciary Advisors, LLC	31 Dec, 2025	0	0.00%	$0.00
CITADEL ADVISORS LLC	31 Dec, 2025	83,589	127.25%	$0.00
XTX Topco Ltd	31 Dec, 2025	29,682	0.00%	$0.00
GSA CAPITAL PARTNERS LLP	31 Dec, 2025	36,157	32.22%	$0.00
Compound Planning, Inc.	31 Dec, 2025	0	0.00%	$0.00

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