0001172661-17-001587.txt : 20170814 0001172661-17-001587.hdr.sgml : 20170814 20170814065252 ACCESSION NUMBER: 0001172661-17-001587 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20170630 FILED AS OF DATE: 20170814 DATE AS OF CHANGE: 20170814 EFFECTIVENESS DATE: 20170814 FILER: COMPANY DATA: COMPANY CONFORMED NAME: Rock Springs Capital Management LP CENTRAL INDEX KEY: 0001595725 IRS NUMBER: 800944416 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-16048 FILM NUMBER: 171026802 BUSINESS ADDRESS: STREET 1: 650 SOUTH EXETER STREET STREET 2: SUITE 1070 CITY: BALTIMORE STATE: MD ZIP: 21202 BUSINESS PHONE: 4102200129 MAIL ADDRESS: STREET 1: 650 SOUTH EXETER STREET STREET 2: SUITE 1070 CITY: BALTIMORE STATE: MD ZIP: 21202 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001595725 XXXXXXXX 06-30-2017 06-30-2017 false Rock Springs Capital Management LP

650 South Exeter Street Suite 1070 Baltimore MD 21202

13F HOLDINGS REPORT 028-16048 N Eric Brody 410-220-0541 /s/ Eric Brody Baltimore MD 08-14-2017 0 149 1980252 INFORMATION TABLE 2 infotable.xml ACADIA HEALTHCARE COMPANY IN COM 00404A109 66663 1350000 SH SOLE 1350000 0 0 ACADIA PHARMACEUTICALS INC COM 004225108 4853 174000 SH SOLE 174000 0 0 ACHILLION PHARMACEUTICALS IN COM 00448Q201 7918 1725000 SH SOLE 1725000 0 0 ACLARIS THERAPEUTICS INC COM 00461U105 11933 440000 SH SOLE 440000 0 0 ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 3929 875000 SH SOLE 875000 0 0 ADURO BIOTECH INC COM 00739L101 4731 415000 SH SOLE 415000 0 0 ADVANCED ACCELERATOR APPLIC SPONSORED ADS 00790T100 32794 840000 SH SOLE 840000 0 0 AEGLEA BIOTHERAPEUTICS INC COM 00773J103 2013 524089 SH SOLE 524089 0 0 AETNA INC NEW COM 00817Y108 58910 388000 SH SOLE 388000 0 0 AIMMUNE THERAPEUTICS INC COM 00900T107 6024 293000 SH SOLE 293000 0 0 ALDER BIOPHARMACEUTICALS INC COM 014339105 2084 182000 SH SOLE 182000 0 0 ALEXION PHARMACEUTICALS INC COM 015351109 56333 463000 SH 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