 NEWTOWN, Pa., May 20, 2021 GLOBE NEWSWIRE -- Onconova Therapeutics, Inc. Nasdaq: ONTX Onconova or the Company, a clinical-stage biopharmaceutical company focused on discovering and developing novel products for patients with cancer, today announced a one-for-fifteen reverse stock split of its common stock, effective May 20, 2021. Beginning at the open of trading on May 21, 2021, Onconovas common stock will trade on the Nasdaq Capital Market on a split-adjusted basis. 