13G Filing: Adage Capital Management and Stemline Therapeutics Inc (STML)

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Item 1(a). NAME OF ISSUER
The name of the issuer is Stemline Therapeutics, Inc. (the “Company“).
Item 1(b). ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES
The Company’s principal executive offices are located at 750 Lexington Avenue, Eleventh Floor, New York, New York 10022.
Item 2(a). NAME OF PERSON FILING
This statement is filed by:
(i) Adage Capital Partners, L.P., a Delaware limited partnership (“ACP“) with respect to the shares of Common Stock directly owned by it;
(ii) Adage Capital Partners GP, L.L.C., a limited liability company organized under the laws of the State of Delaware (“ACPGP“), as general partner of ACP with respect to the shares of Common Stock directly owned by ACP;
(iii) Adage Capital Advisors, L.L.C., a limited liability company organized under the laws of the State of Delaware (“ACA“), as managing member of ACPGP, general partner of ACP, with respect to the shares of Common Stock directly owned by ACP;
(iv) Robert Atchinson (“Mr. Atchinson“), as managing member of ACA, managing member of ACPGP, general partner of ACP with respect to the shares of Common Stock directly owned by ACP; and
(v) Phillip Gross (“Mr. Gross“), as managing member of ACA, managing member of ACPGP, general partner of ACP with respect to the shares of Common Stock directly owned by ACP.
The foregoing persons are hereinafter sometimes collectively referred to as the “Reporting Persons.”  Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party.
The filing of this statement should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of the securities reported herein.
Item 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE
The address of the business office of each of the Reporting Persons is 200 Clarendon Street, 52nd floor, Boston, Massachusetts 02116.
Item 2(c). CITIZENSHIP
ACP is a limited partnership organized under the laws of the State of Delaware.  ACPGP and ACA are limited liability companies organized under the laws of the State of Delaware.  Messrs. Gross and Atchinson are citizens of the United States.

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