Cytosorbents CTSO Institutional Ownership

NASDAQ CTSO

$4.00 +0.00 (+0.00%)

As of: Sep 30, 2026 · 3:56 PM EDT

Institutions by Trading Activity

49 Institutions

Increased 18 36.7%

Unchanged 18 36.7%

Reduced 13 26.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

24.79%

▼-1.47 pp QoQ

Shares Held by Institutions

778.34K

of 3.14Mn outstanding

▼-1.46% QoQ

Shares Outstanding

3.14Mn

2.36Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-1 vs prior quarter

Net Shares Added (QoQ)

-11.56K

distributed since last quarter

Value of Holdings

$3.11Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Cytosorbents Corp (NASDAQ:CTSO) appears in 49 institutional 13F filings for the quarter ending June 2026.

They owned 24.8% of outstanding stock in June 2026, down from 26.3% the prior quarter.
They decreased total shares held in Cytosorbents by -1.46% from the prior quarter, while the number of investors in CTSO increased 8.89% year over year.
Among the 49 funds, 18 bought more Cytosorbents shares, 13 sold down, and 18 held their ground.
The aggregate institutional position in Cytosorbents amounted to 778.34K shares as of June 2026, down by 11.56K shares quarter on quarter, and down 38.35K shares year over year.
As of June 30, 2026, AVENIR CORP held the largest stake in Cytosorbents with 259.46K shares, accounting for 8.26% of total shares outstanding.
Top purchasers of CTSO stock for the quarter ending June 2026 included Neuberger Berman Group LLC (14.28K), Virtu Financial LLC (3.58K), JANE STREET GROUP, LLC (2.61K), VANGUARD CAPITAL MANAGEMENT LLC (1.7K), LPL Financial LLC (1.35K).
The largest sellers of Cytosorbents for the quarter ending June 2026 were Skylands Capital, LLC (24.8K), BlackRock, Inc. (7.79K), GEODE CAPITAL MANAGEMENT, LLC (5.26K), Goldman Sachs Group Inc (1.43K), AVENIR CORP (1.33K).
Business Quant data shows the 10 biggest positions in Cytosorbents as of June 2026 are held by AVENIR CORP (259.46K), Neuberger Berman Group LLC (98.43K), VANGUARD CAPITAL MANAGEMENT LLC (95.7K), CM Management, LLC (73.82K), Skylands Capital, LLC (60.57K), BlackRock, Inc. (31.36K), GEODE CAPITAL MANAGEMENT, LLC (30.1K), Pathstone Holdings, LLC (25.0K), VANGUARD FIDUCIARY TRUST CO (15.81K), CIBC Bancorp USA Inc. (8.63K).

Form 13F Holdings

49 Institutional Holders

Report period 30 Jun, 2026

Total shares held 778.34K

Of outstanding 24.79%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	AVENIR CORP	0001033475	259,461	8.26%	▼1,328	-0.51%	$1.94Mn
2	Neuberger Berman Group LLC	0001465109	98,435	3.13%	▲14,284	+16.97%	$740.52K
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	95,703	3.05%	▲1,704	+1.81%	$715.86K
4	CM Management, LLC	0001841857	73,825	2.35%	0	0.00%	$552.21K
5	Skylands Capital, LLC	0001299910	60,570	1.93%	▼24,805	-29.05%	$453.06K
6	BlackRock, Inc.	0002012383	31,361	1.00%	▼7,789	-19.90%	$234.58K
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	30,103	0.96%	▼5,260	-14.87%	$225.24K
8	Pathstone Holdings, LLC	0002011612	24,996	0.80%	▼2	-0.01%	$186.97K
9	VANGUARD FIDUCIARY TRUST CO	0000933478	15,808	0.50%	▲116	+0.74%	$118.25K
10	CIBC Bancorp USA Inc.	0001711924	8,632	0.27%	0	0.00%	$64.57K
11	State Street Corp	0000093751	7,965	0.25%	0	0.00%	$59.58K
12	OSAIC HOLDINGS, INC.	0001677044	6,742	0.21%	▲221	+3.39%	$49.99K
13	UBS Group AG	0001610520	6,551	0.21%	▲791	+13.73%	$49.00K
14	Northern Trust Corp	0000073124	5,583	0.18%	▲956	+20.66%	$41.76K
15	Raymond James Financial Inc	0000720005	5,381	0.17%	▼7	-0.13%	$40.25K
16	NWF Advisory Services Inc.	0002045735	5,207	0.17%	0	0.00%	$38.95K
17	RENAISSANCE TECHNOLOGIES LLC	0001037389	5,001	0.16%	▼35	-0.69%	$37.41K
18	Morgan Stanley	0000895421	4,567	0.15%	▼442	-8.82%	$34.16K
19	Key Client Fiduciary Advisors, LLC	0001912612	3,923	0.12%	0	0.00%	$29.34K
20	Virtu Financial LLC	0001533964	3,575	0.11%	▲3,575	0.00%	$27

Showing 1 to 20 of 49 holders