X0206 3 2021-01-26 0 0001822862 Fortistar Sustainable Solutions Corp. FSSI 0001399334 Lese William D C/O FORTISTAR SUSTAINABLE SOLUTIONS CORP ONE NORTH LEXINGTON AVENUE WHITE PLAINS NY 10601 true Class B Common Stock, par value $0.0001 Class A Common Stock, par value $0.0001 25000 D The reporting person owns 25,000 shares of Class B Common Stock, par value $0.0001 per share ("Class B Common Stock"), which are convertible into shares of Class A Common Stock, par value $0.0001 per share, as described under the heading "Description of Securities-Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-251922). The shares of Class B Common Stock have no expiration date. Exhibit 24.1 Power of Attorney. /s/ Nadeem Nisar, Attorney-in-Fact for William D. Lese 2021-01-26