Certain Common Stock of Stemline Therapeutics, Inc. are subject to a Lock-Up Agreement Ending on 7-NOV-2019. These Common Stock will be under lockup for 91 days starting from 8-AUG-2019 to 7-NOV-2019. Details: The officers and directors have entered into a lock up agreement pursuant to which, they will not directly or indirectly, offer, sell, contract to sell, pledge, grant or dispose of or hedge any common stock or securities convertible into or exchangeable or exercisable for common stock, for a period of 90 days after the date of the prospectus