CTSO insider trading — Cytosorbents Corp
Over the last 90 days, insiders at Cytosorbents Corp (CTSO) made 4 open-market purchases worth $120K and 0 open-market sales worth $0, making them net buyers by $120K. The largest purchase was by Chan Phillip P. (Chief Executive Officer), who bought 200,000 shares for $70K on Sep 4, 2026. 3 different insiders bought shares in this period — a cluster buy, which many investors watch closely.
Updated Oct 16, 2026.
Recent CTSO insider transactions
Every Form 4 filed by Cytosorbents Corp officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | Chan Phillip P. | Chief Executive Officer | P · Purchase | Direct | 3,774 | $6.00 | $23K | Form 4 |
| Sep 15, 2026 | Sobel Alan D. | Director | P · Purchase | Direct | 2,500 | $6.10 | $15K | Form 4 |
| Sep 14, 2026 | Capponi Vincent | President and COO | P · Purchase | Direct | 2,073 | $6.05 | $13K | Form 4 |
| Sep 4, 2026 | Chan Phillip P. | Chief Executive Officer | P · Purchase | Direct | 200,000 | $0.35 | $70K | Form 4 |
CTSO insider trading FAQ
Are insiders buying CTSO stock?
Yes. In the last 90 days, Cytosorbents Corp insiders made 4 open-market purchases totaling $120K, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading CTSO?
Recent buyers: Capponi Vincent, Chan Phillip P., Sobel Alan D..
Where does CTSO insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.