CTSO Insider Trading

Insider Trading Chart
Insider Trading History
Frequently Asked Questions
About

Insider Ownership Percentage: 7.30%

Insider Buying (Last 12 Months): $29,313.07

Insider Selling (Last 12 Months): $0.00

Cytosorbents Insider Trading History Chart

Cytosorbents Share Price & Price History

^$0.74

▲ +0.009 (1.23%)

As of 12/4/2025 05:00 PM ET

Days: 30 | 90 | 365

Cytosorbents Insider Trading History

Transaction Date	Insider Name	Title	Buy/Sell	Number of Shares	Average Share Price	Total Transaction	Shares Held After Transaction
12/13/2024	Peter J Mariani	CFO	Buy	20,000	$0.96	$19,200.00	401,363
12/11/2024	Peter J Mariani	CFO	Buy	11,363	$0.89	$10,113.07	361,363
12/13/2023	Alan D Sobel	Director	Buy	22,557	$1.33	$30,000.81	101,857
8/7/2023	Michael G Bator	Director	Buy	2,000	$3.17	$6,340.00	87,800
8/4/2023	Michael G Bator	Director	Buy	1,000	$3.23	$3,230.00	85,800
5/25/2023	Kathleen P. Bloch	CFO	Buy	3,300	$2.85	$9,405.00	47,000
5/10/2023	Kathleen P. Bloch	CFO	Buy	10,000	$3.11	$31,100.00	43,700
12/8/2022	Phillip P. Chan	CEO	Buy	5,859	$1.26	$7,382.34	897,279
12/6/2022	Phillip P. Chan	CEO	Buy	14,291	$1.26	$18,006.66	881,570

SEC Filings (Institutional Ownership Changes) for Cytosorbents (NASDAQ:CTSO)

32.87% of Cytosorbents stock is owned by institutions. Institutional ownership can be a sign of analyst confidence in the fundamentals of the stock.

Institutional Buying and Selling by Quarter

Cytosorbents Institutional Trading History

Reporting Date	Hedge Fund	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
11/21/2025	CIBC Bancorp USA Inc.	172,649	$0.16M	0.0%	N/A	0.275%
11/17/2025	Susquehanna International Group LLP	98,221	$92K	0.0%	-25.5%	0.156%
11/17/2025	Citadel Advisors LLC	65,690	$61K	0.0%	+127.3%	0.105%
11/13/2025	CM Management LLC	1,288,128	$1.20M	1.0%	+3.1%	2.052%
11/7/2025	GSA Capital Partners LLP	112,217	$0.11M	0.0%	N/A	0.179%
11/7/2025	Vanguard Group Inc.	2,204,294	$2.06M	0.0%	+3.7%	3.512%
11/6/2025	Skylands Capital LLC	2,127,265	$1.99M	0.3%	-18.7%	3.389%
9/4/2025	Osaic Holdings Inc.	130,419	$0.17M	0.0%	-20.4%	0.208%
8/15/2025	Avenir Corp	5,058,537	$6.48M	0.7%	+0.3%	8.060%
8/8/2025	Geode Capital Management LLC	601,451	$0.77M	0.0%	-2.0%	0.961%
6/27/2025	Goldman Sachs Group Inc.	62,662	$63K	0.0%	+149.2%	0.100%
5/16/2025	Goldman Sachs Group Inc.	62,662	$63K	0.0%	+149.2%	0.100%
5/16/2025	Granahan Investment Management LLC	358,418	$0.36M	0.0%	-70.2%	0.572%
5/14/2025	Avenir Corp	5,044,918	$5.05M	0.5%	+63.1%	8.058%
5/9/2025	CM Management LLC	954,076	$0.95M	0.9%	+36.3%	1.524%
5/5/2025	Sargent Investment Group LLC	823,500	$0.82M	0.1%	-34.1%	1.315%
4/25/2025	Skylands Capital LLC	3,002,702	$3M	0.4%	+7.9%	4.804%
4/10/2025	Key Client Fiduciary Advisors LLC	78,457	$78K	0.0%	+127.0%	0.126%
2/17/2025	Millennium Management LLC	33,280	$30K	0.0%	N/A	0.061%
2/17/2025	Granahan Investment Management LLC	1,204,580	$1.10M	0.0%	-42.5%	2.203%
2/14/2025	Northern Trust Corp	91,560	$83K	0.0%	+22.3%	0.167%
2/13/2025	Avenir Corp	3,093,946	$2.82M	0.3%	+4.0%	5.658%
2/13/2025	Neuberger Berman Group LLC	1,681,883	$1.53M	0.0%	-5.6%	3.076%
2/13/2025	Raymond James Financial Inc.	108,621	$99K	0.0%	N/A	0.199%
2/13/2025	Renaissance Technologies LLC	88,020	$80K	0.0%	+10.6%	0.161%
2/7/2025	CM Management LLC	700,000	$0.64M	0.6%	-12.5%	1.280%
2/6/2025	Raymond James Financial Inc.	108,621	$99K	0.0%	N/A	0.199%
2/4/2025	Skylands Capital LLC	2,781,622	$2.53M	0.4%	+1.0%	5.087%
1/27/2025	Sargent Investment Group LLC	1,248,863	$1.14M	0.2%	-23.2%	2.284%
11/16/2024	Geode Capital Management LLC	467,058	$0.70M	0.0%	+7.5%	0.854%
11/6/2024	Sargent Investment Group LLC	1,626,247	$2.44M	0.4%	+13.4%	2.988%
10/8/2024	Atomi Financial Group Inc.	34,292	$51K	0.0%	N/A	0.063%
8/10/2024	Sargent Investment Group LLC	1,433,500	$1.01M	0.2%	+4.9%	2.640%
8/2/2024	CM Management LLC	850,000	$0.60M	0.5%	+3.0%	1.565%
7/26/2024	Skylands Capital LLC	2,840,778	$2M	0.3%	-1.2%	5.231%
5/16/2024	Avenir Corp	3,172,696	$3.01M	0.3%	+4.0%	5.842%
5/14/2024	CM Management LLC	825,000	$0.78M	0.6%	+98.8%	1.519%
4/15/2024	Key Client Fiduciary Advisors LLC	34,557	$33K	0.0%	+188.0%	0.064%
2/14/2024	Avenir Corp	3,051,402	$3.39M	0.3%	+12.3%	6.866%
2/14/2024	Neuberger Berman Group LLC	1,801,799	$2M	0.0%	+19.9%	4.054%
2/9/2024	Neuberger Berman Group LLC	1,801,799	$2M	0.0%	+19.9%	4.054%
2/5/2024	Skylands Capital LLC	3,254,213	$3.61M	0.5%	+10.5%	7.323%
2/5/2024	Sargent Investment Group LLC	1,308,747	$1.45M	0.3%	+4.1%	2.945%
1/16/2024	Raymond James & Associates	50,000	$56K	0.0%	N/A	0.113%
11/13/2023	Sargent Investment Group LLC	1,257,048	$2.36M	0.6%	-2.5%	2.834%
11/1/2023	Jacob Asset Management of New York LLC	197,940	$0.37M	0.5%	-16.8%	0.446%
10/27/2023	Skylands Capital LLC	2,944,670	$5.54M	0.8%	+5.4%	6.638%
10/26/2023	Chicago Partners Investment Group LLC	36,358	$67K	0.0%	+84.0%	0.082%
8/14/2023	Granahan Investment Management LLC	1,616,587	$5.80M	0.2%	+3.1%	3.644%
8/11/2023	Regal Investment Advisors LLC	19,168	$69K	0.0%	+36.6%	0.043%
8/11/2023	Avenir Corp	2,719,732	$9.76M	0.9%	+6.4%	6.131%
8/8/2023	Chicago Partners Investment Group LLC	19,760	$66K	0.0%	+88.2%	0.045%
8/7/2023	Acadian Asset Management LLC	9,059	$32K	0.0%	N/A	0.020%
8/4/2023	Simplex Trading LLC	26,581	$95K	0.0%	-18.8%	0.060%
8/3/2023	Skylands Capital LLC	2,793,470	$10.03M	1.4%	+1.4%	6.356%
8/2/2023	Houlihan Financial Resource Group Ltd.	18,600	$59K	0.0%	N/A	0.042%
7/31/2023	Cowen Prime Advisors LLC	42,301	$0.15M	0.1%	-8.1%	0.096%
7/31/2023	Sargent Investment Group LLC	1,289,546	$4.63M	1.1%	+5.8%	2.934%
7/19/2023	Eudaimonia Partners LLC	23,500	$84K	0.0%	+17.5%	0.053%
7/10/2023	B.O.S.S. Retirement Advisors LLC	13,491	$48K	0.0%	N/A	0.031%
7/10/2023	AE Wealth Management LLC	13,783	$49K	0.0%	N/A	0.031%
5/15/2023	Granahan Investment Management LLC	1,567,540	$5.28M	0.2%	-1.6%	3.566%
5/11/2023	Jacob Asset Management of New York LLC	237,940	$0.80M	0.9%	-4.0%	0.541%
5/11/2023	Texas Capital Bank Wealth Management Services Inc.	37,625	$0.13M	0.0%	-23.1%	0.086%
5/8/2023	CM Management LLC	450,000	$1.52M	1.8%	-5.3%	1.024%
5/5/2023	Coastal Investment Advisors Inc.	12,000	$40K	0.0%	N/A	0.027%
5/4/2023	Skylands Capital LLC	2,754,970	$9.28M	1.4%	+8.4%	6.268%
5/3/2023	Cowen Prime Advisors LLC	46,050	$0.11M	0.0%	+11.8%	0.105%
5/2/2023	Sargent Investment Group LLC	1,218,533	$4.22M	1.1%	+23.8%	2.773%
4/26/2023	Chicago Partners Investment Group LLC	10,498	$29K	0.0%	-31.0%	0.024%
2/14/2023	Avenir Corp	2,447,089	$3.79M	0.4%	+5.7%	5.608%
2/14/2023	Susquehanna International Group LLP	31,943	$50K	0.0%	+379.5%	0.073%
2/14/2023	Granahan Investment Management LLC	1,593,711	$2.47M	0.1%	+5.5%	3.652%
2/13/2023	Neuberger Berman Group LLC	1,529,095	$2.33M	0.0%	+3.3%	3.504%
2/9/2023	CM Management LLC	475,000	$0.74M	0.9%	-29.6%	1.089%
2/9/2023	Skylands Capital LLC	2,542,091	$3.94M	0.6%	+8.3%	5.826%
1/31/2023	Sargent Investment Group LLC	984,133	$1.53M	0.5%	-11.2%	2.255%
1/24/2023	Eudaimonia Partners LLC	20,000	$31K	0.0%	+81.8%	0.046%
11/16/2022	Avenir Corp	2,314,854	$3.15M	0.3%	+6.9%	5.304%
11/14/2022	Ergoteles LLC	177,503	$0.24M	0.0%	-12.4%	0.407%
11/4/2022	CM Management LLC	675,000	$0.92M	1.0%	+12.5%	1.549%
11/1/2022	Skylands Capital LLC	2,347,034	$3.19M	0.5%	+0.9%	5.386%
10/27/2022	Sargent Investment Group LLC	1,108,233	$2.03M	0.6%	+13.4%	2.543%
8/15/2022	Winning Points Advisors LLC	24,900	$54K	0.1%	-63.6%	0.057%
8/11/2022	Avenir Corp	2,164,999	$4.74M	0.5%	-0.5%	4.968%
8/8/2022	CM Management LLC	600,000	$1.31M	1.4%	+71.4%	1.377%
8/8/2022	Y Intercept Hong Kong Ltd	14,304	$31K	0.0%	N/A	0.033%
8/4/2022	Texas Capital Bank Wealth Management Services Inc.	48,958	$0.11M	0.0%	N/A	0.112%
8/1/2022	Cowen Prime Advisors LLC	42,200	$92K	0.1%	+170.5%	0.097%
7/28/2022	Skylands Capital LLC	2,324,997	$5.09M	0.7%	+9.3%	5.337%
7/27/2022	Country Club Bank GFN	15,225	$34K	0.0%	N/A	0.035%
7/26/2022	Sargent Investment Group LLC	977,496	$2.14M	0.7%	+18.1%	2.244%
7/19/2022	Key Client Fiduciary Advisors LLC	12,000	$26K	0.0%	N/A	0.028%
5/16/2022	Granahan Investment Management LLC	1,215,928	$3.88M	0.1%	+10.0%	2.791%
5/11/2022	GSA Capital Partners LLP	131,655	$0.42M	0.1%	+912.5%	0.302%
5/9/2022	CM Management LLC	350,000	$1.12M	0.9%	+16.7%	0.803%
5/6/2022	Sargent Investment Group LLC	827,380	$2.64M	0.7%	+5.4%	1.899%
5/5/2022	Skylands Capital LLC	2,127,952	$6.79M	0.8%	+9.3%	4.885%
5/5/2022	Royce & Associates LP	349,000	$1.11M	0.0%	+39.0%	0.801%
5/2/2022	Cowen Prime Advisors LLC	15,600	$50K	0.0%	+316.0%	0.036%

Data available starting January 2016

Cytosorbents Corporation engages in the research, development, and commercialization of medical devices with its blood purification technology platform incorporating a proprietary adsorbent and porous polymer technology in the United States, Germany, and internationally. Its flagship product is CytoSorb, an extracorporeal cytokine adsorber for adjunctive therapy in the treatment of sepsis, adjunctive therapy in other critical care applications, prevention, and treatment of perioperative complications, and maintaining or enhancing the quality of solid organs harvested from donors for organ transplant; and offers VetResQ, a device for adjunctive therapy in the treatment of sepsis, pancreatitis, and other critical illnesses in animals. The company also develops CytoSorb-XL, a device for adjunctive therapy in the treatment of sepsis and other critical illnesses; HemoDefend blood purification technology platform to reduce contaminants in the blood supply that can cause transfusion reactions or disease when administering blood and blood products to patients, and removal of anti-A and anti-B blood group antibodies from whole blood and plasma; K+ontrol for treatment of severe hyperkalemia in patients with life-threatening conditions; and ContrastSorb for the removal of IV contrast in blood administered during CT imaging, an angiogram, or during a vascular interventional radiology procedure to reduce the risk of contrast-induced nephropathy. In addition, it develops BetaSorb, a device for the prevention and treatment of health complications caused by the accumulation of metabolic toxins in patients with chronic renal failure; DrugSorb, a device to remove drugs and chemicals from the blood; and DrugSorb-ATR, an antithrombotic removal system. The company was formerly known as MedaSorb Technologies Corporation and changed its name to Cytosorbents Corporation in May 2010. Cytosorbents Corporation was founded in 1997 and is headquartered in Princeton, New Jersey.

Today's Range

Now: $0.74

$0.70

$0.75

50 Day Range

MA: $0.81

$0.62

$0.99

52 Week Range

Now: $0.74

$0.60

$1.61

Volume

65,983 shs

Average Volume

123,427 shs

Market Capitalization

$46.41 million

P/E Ratio

N/A

Dividend Yield

N/A

Beta

1.28

Who are the company insiders with the largest holdings of Cytosorbents?: Cytosorbents' top insider investors include:
Peter J Mariani (CFO)
Alan D Sobel (Director)
Learn More about top insider investors at Cytosorbents.
Who are the major institutional investors of Cytosorbents?: Cytosorbents' top institutional investors include:
Vanguard Group Inc. — 3.51%
Skylands Capital LLC — 3.39%
CM Management LLC — 2.05%
CIBC Bancorp USA Inc. — 0.27%
GSA Capital Partners LLP — 0.18%
Susquehanna International Group LLP — 0.16%
Learn More about top institutional investors of Cytosorbents stock.
Which institutional investors are selling Cytosorbents stock?: Within the last quarter, CTSO stock was sold by these institutional investors:
Skylands Capital LLC
Susquehanna International Group LLP
Which institutional investors are buying Cytosorbents stock?: During the last quarter, CTSO stock was purchased by institutional investors including:
CIBC Bancorp USA Inc.
GSA Capital Partners LLP
Vanguard Group Inc.
CM Management LLC
Citadel Advisors LLC
During the last year, these company insiders have bought Cytosorbents stock:
Peter J Mariani (CFO)
Alan D Sobel (Director)
Learn More investors buying Cytosorbents stock.