Form 4 Filing for Peter J. Mariani

Peter J. Mariani, Chief Financial Officer of Cytosorbents Corp, reported a purchase of 100,000 shares of Common Stock on June 15, 2026. The purchase was made on the open market at a weighted average price of $0.44 per share, with prices ranging from $0.40 to $0.45. Following this transaction, Mariani owns 638,113 shares. This total includes various restricted stock units (RSUs) that will vest under different conditions, such as a Change in Control or specific anniversaries, and are subject to continued service. The filing also details other holdings, including 216,613 shares of Common Stock already owned by Mariani. This transaction is classified as an open market purchase.