Cytosorbents Corp (CTSO) insider buying and selling
In the last 90 days at Cytosorbents Corp (CTSO), 1 insider made 1 open-market purchase worth $70K and there were no open-market sales, as reported on SEC Form 4. Over the last 12 months, 2 insiders bought $219K of the stock, led by Phillip P. Chan (CEO), who bought $105K between Jun 12–15, 2026.
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Trades by the same insider within a week are shown as one line.
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| Phillip P. Chan CEO | Open market purchase | 200,000 | $0.35 | $70K | |
| Phillip P. Chan CEO | Open market purchase 2 trades | 261,469 | avg. $0.40 | $105K | |
| PETER J MARIANI CFO | Open market purchase | 100,000 | $0.44 | $44K |
What the CTSO insider trades really mean
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Questions about CTSO insider trading
Who bought Cytosorbents Corp (CTSO) stock recently?
Insiders who bought Cytosorbents Corp stock on the open market in the last 12 months: Phillip P. Chan ($175K), PETER J MARIANI ($44K). The most recent purchase was reported on Sep 4, 2026.
Are insiders buying or selling CTSO?
Over the last 12 months insiders were net buyers of CTSO on discretionary trades: $219K bought against $0 sold (scheduled and tax-related sales excluded).
What is a sell-to-cover or 10b5-1 sale?
A 10b5-1 sale is scheduled in advance under a pre-arranged plan, and a sell-to-cover sale is made to pay tax on vesting shares. Neither is a fresh decision to sell, so they say less about an insider's view than a discretionary sale.
Where does this data come from?
Officers, directors and large shareholders report their trades to the SEC on Form 4. This page lists the open-market purchases and sales by individual insiders from those public filings; funds and other institutions are not shown.
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How to read this page
Officers, directors and large shareholders must report their trades in company shares to the SEC on Form 4. This page lists open-market purchases and sales by individual insiders: trades made on the stock exchange at the going price. Funds and other institutions are not shown here.
Information from SEC EDGAR Form 4 filings, shown for general information only. It is not financial advice and does not recommend buying or selling any security. Trades are shown by transaction date and may be reported up to two business days later.