SCHEDULE 13G/A 0001033475 XXXXXXXX LIVE 4 Common Stock 12/31/2025 0001175151 Cytosorbents Corp 23283X206 305 COLLEGE ROAD EAST PRINCETON NJ 08540 Rule 13d-1(b) AVENIR CORP b VA 5230099.00 5230099.00 5230099.00 8.3 IA James H. Rooney b VA 5230099.00 5230099.00 8.3 IN Cytosorbents Corp 305 COLLEGE ROAD EAST, PRINCETON, NEW JERSEY, 08540 This Schedule 13G ("Schedule") is being filed on behalf of Avenir Corporation ("Avenir"), a Virginia corporation, and James H. Rooney (Mr. Rooney along with Avenir are "Reporting Persons"). Avenir is an investment adviser registered under the Investment Advisers Act of 1940, as amended ("Advisers Act"). Mr. Rooney is the portfolio manager and a shareholder of Avenir. 277 South Washington Street Suite 350 Alexandria, VA 22314 State of Virginia, USA N IA 5,230,099 8.33% 5,230,099 5,230,099 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. AVENIR CORP James H. Rooney 02/13/2026 James H. Rooney James H. Rooney 02/13/2026