StockCIK 1175151

Cytosorbents Corp (CTSO): Insider Trades and Fund Holdings

In the past 12 months, Cytosorbents Corp insiders reported 4 open-market purchases worth $120K and 0 sales worth $0.

4Insider buys, 12 months

$120KBought by insiders, 12 months

$0Sold by insiders, 12 months

1Tracked funds holding

Recent insider trades

Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 16, 2026.

Recent CTSO insider trades
Filed	Traded	Insider	Role	Type	Shares	Price ($)	Value	Holding	Filing
Sep 16	Sep 15	Phillip P. ChanCEO	CEO	▲ BUY	3,774	6.00	$23K	+3.9%	Form 4 ↗
Sep 16	Sep 15	Alan D. SobelDirector	Director	▲ BUY	2,500	6.10	$15K	+34%	Form 4 ↗
Sep 16	Sep 14	Vincent CapponiCOO	COO	▲ BUY	2,073	6.05	$13K	+5.4%	Form 4 ↗
Sep 9	Sep 4	Phillip P. ChanCEO	CEO	▲ BUY	200,000	0.35	$70K	+12%	Form 4 ↗

Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

Insiders who traded in the past year

Insider	Role	Buys	Bought	Sold	Latest
Phillip P. Chan	CEO	2	$93K	$0	Sep 16, 2026
Alan D. Sobel	Director	1	$15K	$0	Sep 16, 2026
Vincent Capponi	COO	1	$13K	$0	Sep 16, 2026

Tracked funds that report CTSO

From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.

Fund	Quarter	Shares	Value	% of portfolio	Change
Renaissance Technologies	Q2 2026	100,020	$37K	0.00%	▼ −0.7%

Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings

Reading these numbers

Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →