Cytosorbents Ownership | Who Owns Cytosorbents?

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Cytosorbents Ownership Summary

Cytosorbents is owned by 26.08% institutional investors, 15.46% insiders, and 58.46% retail investors. Avenir is the largest institutional shareholder, holding 8.08% of CTSO shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.08% of its assets in Cytosorbents shares.

CTSO Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Cytosorbents	26.08%	15.46%	58.46%
Sector	Healthcare Stocks	486.50%	11.08%	-397.59%
Industry	Medical Device Stocks	52.08%	10.61%	37.30%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Avenir	5.06M	8.08%	$6.47M
Skylands capital	2.62M	4.18%	$3.35M
Vanguard group	1.95M	3.58%	$1.77M
Neuberger berman group	1.68M	3.09%	$1.53M
Cm management	700.00K	1.29%	$637.00K
Blackrock	655.80K	1.21%	$461.03K
Sargent investment group	746.20K	1.19%	$673.07K
Blackrock funding, inc. /de	745.61K	1.19%	$954.38K
Geode capital management	474.15K	0.87%	$431.59K
Cibc private wealth group	172.65K	0.28%	$220.99K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Avenir	5.06M	0.67%	$6.47M
Cm management	700.00K	0.57%	$637.00K
Skylands capital	2.62M	0.49%	$3.35M
Sargent investment group	746.20K	0.09%	$673.07K
Key client fiduciary advisors	78.46K	0.04%	$100.42K
Seelaus asset management	18.30K	0.02%	$23.42K
Atomi financial group	27.44K	0.00%	$35.13K
Neuberger berman group	1.68M	0.00%	$1.53M
Country club bank /gfn	15.22K	0.00%	$18.73K
Advisor group	122.42K	0.00%	$168.72K

Top Buyers

Holder	Shares	% Assets	Change
Ubs group	144.93K	-	142.35K
Blackrock funding, inc. /de	745.61K	-	118.31K
Kestra advisory services	55.00K	0.00%	41.80K
Goldman sachs group	25.14K	-	25.14K
Avenir	5.06M	0.67%	13.62K

Top Sellers

Holder	Shares	% Assets	Change
Skylands capital	2.62M	0.49%	-385.99K
Granahan investment management	-	-	-358.42K
Cm management	700.00K	0.57%	-100.00K
Neuberger berman group	1.68M	0.00%	-99.48K
Amh equity	-	-	-82.80K

New Positions

Holder	Shares	% Assets	Change	Value
Goldman sachs group	25.14K	-	25.14K	$22.88K
Citadel advisors	500.00	-	500.00	$352.00

Sold Out

Holder	Change
Qube research	-1.00
Allworth financial lp	-37.00
Fmr	-285.00
Lazard asset management	-1.09K
New wave wealth advisors	-1.63K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2025	42	-14.29%	16,329,093	-3.59%	26	3.35%	11	-52.17%	18	80.00%
Mar 31, 2025	2	-96.08%	381,533	-97.51%	-	0.09%	1	-95.83%	1	-90.91%
Dec 31, 2024	50	-5.66%	15,327,094	-6.70%	28	3.09%	23	35.29%	11	-15.38%
Sep 30, 2024	53	8.16%	16,427,732	-1.05%	30	3.22%	17	54.55%	13	-23.53%
Jun 30, 2024	49	4.26%	16,601,658	-5.30%	30	1.99%	11	-21.43%	17	13.33%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.30M	2.08%	-
Vanguard Total Stock Mkt Idx Inv	1.27M	2.04%	-27.85K
M&G (ACS) Granahan US Sm Cp Gr GBPZ1AAcc	763.50K	1.40%	-101.78K
Neuberger Berman Intrinsic Value I	674.87K	1.08%	-
Vanguard Institutional Extnd Mkt Idx Tr	510.72K	0.82%	-232.72K
Fidelity Extended Market Index	306.12K	0.49%	-799.00
iShares Micro-Cap ETF	132.84K	0.21%	-
JNL Multi-Manager Small Cap Growth A	124.74K	0.20%	-310.82K
BlackRock Extended Equity Market K	103.38K	0.19%	-44.00
Neuberger Berman Small Cap Intrinsic Val	112.06K	0.18%	-11.40K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Dec 13, 2024	MARIANI PETER J	Chief Financial Officer	Buy	$19.29K
Dec 12, 2024	MARIANI PETER J	Chief Financial Officer	Buy	$17.87K
Dec 11, 2024	MARIANI PETER J	Chief Financial Officer	Buy	$10.10K
Dec 13, 2023	Sobel Alan D.	-	Buy	$30.00K
Dec 13, 2023	Sobel Alan D.	-	Buy	$15.79K

Insider Transactions Trends

Date	Buy	Sell
2025 Q3	-	-
2025 Q1	-	-
2024 Q4	3	-
2024 Q3	-	-
2024 Q2	-	-

CTSO Ownership FAQ

Who Owns Cytosorbents?

Cytosorbents shareholders are primarily institutional investors at 26.08%, followed by 15.46% insiders and 58.46% retail investors. The average institutional ownership in Cytosorbents's industry, Medical Device Stocks, is 52.08%, which Cytosorbents falls below.

Who owns the most shares of Cytosorbents?

Cytosorbents’s largest shareholders are Avenir (5.06M shares, 8.08%), Skylands capital (2.62M shares, 4.18%), and Vanguard group (1.95M shares, 3.58%). Together, they hold 15.84% of Cytosorbents’s total shares outstanding.

Does Blackrock own Cytosorbents?

Yes, BlackRock owns 1.21% of Cytosorbents, totaling 655.8K shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 461.03K$. In the last quarter, BlackRock decreased its holdings by -66.63K shares, a -9.22% change.

Who is Cytosorbents’s biggest shareholder by percentage of total assets invested?

Avenir is Cytosorbents’s biggest shareholder by percentage of total assets invested, with 0.67% of its assets in 5.06M Cytosorbents shares, valued at 6.47M$.

Who is the top mutual fund holder of Cytosorbents shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Cytosorbents shares, with 2.08% of its total shares outstanding invested in 1.3M Cytosorbents shares.

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