Certain Warrants of Sera Prognostics, Inc. are subject to a Lock-Up Agreement Ending on 10-JAN-2022. These Warrants will be under lockup for 180 days starting from 14-JUL-2021 to 10-JAN-2022. Details: The officers and directors and substantially all of stockholders of equity securities have entered into a lock up agreement pursuant to which, they will not to offer, sell, contract to sell, pledge or otherwise dispose of, including the filing of a registration statement in respect of, or hedge any shares of Class A common stock or any securities convertible into or exchangeable or exercisable for common stock, for a period of 180 days from the date of the final prospectus, without the prior written consent of Citigroup Global Markets Inc., Cowen and Company, LLC and William Blair & Company, L.L.C., on behalf of the underwriters.