Certain Class B Common Stock of Iron Spark I Inc. are subject to a Lock-Up Agreement Ending on 6-DEC-2021. These Class B Common Stock will be under lockup for 181 days starting from 8-JUN-2021 to 6-DEC-2021. Details: The sponsor and officers and directors have agreed that they will not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, without the prior written consent of Oppenheimer & Co. Inc. for a period of 180 days after the date of this prospectus, any units, warrants, common stock or any other securities convertible into, or exercisable, or exchangeable for, common stock.