424B3

AST SpaceMobile rebooked its BlueWalker 3 test satellite launch to Summer 2022 after paying a rebooking fee in November 2021, with the launch provider now confirming availability in that window, though actual timing remains subject to various factors. The company filed this prospectus supplement on January 19, 2022 to update investors on the launch delay and rescheduling, with Class A shares trading at $6.06 on that date. The filing also registered up to 141.5 million shares of Class A common stock for possible issuance in exchange for ownership units in AST & Science LLC tendered by members.