X0306 4 2020-06-10 1 0001264587 STEMLINE THERAPEUTICS INC STML 0001633639 Cline Darren S C/O STEMLINE THERAPEUTICS, INC. 750 LEXINGTON AVENUE, ELEVENTH FLOOR NEW YORK NY 10022 1 0 0 0 Common Stock 2020-06-10 4 U 0 35468 D 0 D Disposed of in connection with a tender offer made pursuant to an agreement and plan of merger among Issuer, Berlin-Chemie AG, and Mercury Merger Sub, Inc., dated as of May 3, 2020, in exchange for $11.50 per share, net to the holder in cash, plus one contractual contingent value right ("CVR") per share. Each CVR represents the right to receive a payment of $1.00 in cash upon the achievement of a certain milestone relating to the first sale of ELZONRIS in any one of certain countries following a marketing authorization approval by the European Commission. The CVR milestone must be achieved on or prior to December 31, 2021. /s/ Kenneth Hoberman, Attorney-in-Fact 2020-06-10