NEW YORK, NY / ACCESSWIRE / March 3, 2017 / Pomerantz LLP announces that a class action lawsuit has been filed against Stemline Therapeutics, Inc. ("Stemline" or the "Company") (STML) and certain of its officers. The class action, filed in United States District Court, Southern District of New York, and docketed under 17-cv-00940, is on behalf of a class consisting of all persons or entities who purchased or otherwise acquired Stemline securities: (1) pursuant and/or traceable to Stemline's secondary public offering on or about January 20, 2017 (the "Offering"); and/or (2) on the open market between January 19, 2017 and February 1, 2017, inclusive (the "Class Period"). Plaintiff seeks to recover compensable damages caused by Defendants' violations of the federal securities laws under the Securities Act of 1933 (the "Securities Act") and under the Securities Exchange Act of 1934 (the "Exchange Act").

If you are a shareholder who purchased Stemline securities during the Class Period, you have until April 4, 2017 to ask the Court to appoint you as Lead Plaintiff for the class. A copy of the Complaint can be obtained at www.pomerantzlaw.com. To discuss this action, contact Robert S. Willoughby at rswilloughby@pomlaw.com or 888.476.6529 (or 888.4-POMLAW), toll free, ext. 9980. Those who inquire by e-mail are encouraged to include their mailing address, telephone number, and number of shares purchased.

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Stemline is a clinical stage biopharmaceutical company that focuses on the discovery, acquisition, development, and commercialization of proprietary oncology therapeutics in the United States. Stemline is presently conducting an ongoing pivotal Phase 2 trial in blastic plasmacytoid dendritic cell neoplasm, using Stemline's experimental compound, SL-401. At present, BPDCN has no approved treatment.

On January 20, 2017, Stemline commenced a Secondary Public Offering, offering 4.5 million shares of its common stock at $10.00 per share, with expected gross proceeds to Stemline of $45 million.

The Complaint alleges that in the offering documents for the Secondary Public Offering and throughout the Class Period, Defendants made materially false and misleading statements regarding the Company's business, operational and compliance policies. Specifically, Defendants made false and/or misleading statements and/or failed to disclose that: Stemline officials failed to disclose the at a cancer patient in one of its trials died from a severe side effect due to SL-401 on January 18, 2017, immediately prior to the Company's Secondary Public Offering.