0001172661-16-002886.txt : 20160216 0001172661-16-002886.hdr.sgml : 20160215 20160216130619 ACCESSION NUMBER: 0001172661-16-002886 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20151231 FILED AS OF DATE: 20160216 DATE AS OF CHANGE: 20160216 EFFECTIVENESS DATE: 20160216 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: 161425757 BUSINESS ADDRESS: STREET 1: 650 SOUTH EXETER STREET CITY: BALTIMORE STATE: MD ZIP: 21202 BUSINESS PHONE: 4102200129 MAIL ADDRESS: STREET 1: 650 SOUTH EXETER STREET CITY: BALTIMORE STATE: MD ZIP: 21202 13F-HR 1 primary_doc.xml 13F-HR LIVE false true false 0001595725 XXXXXXXX 12-31-2015 12-31-2015 false Rock Springs Capital Management LP

650 South Exeter Street Baltimore MD 21202

13F HOLDINGS REPORT 028-16048 N Evans Apeadu 410-220-0129 /s/ Evans Apeadu Baltimore MD 02-16-2016 0 120 1319729 INFORMATION TABLE 2 infotable.xml ABBVIE INC COM 00287Y109 5184 87500 SH SOLE 87500 0 0 ACADIA HEALTHCARE COMPANY IN COM 00404A109 42161 675000 SH SOLE 675000 0 0 ACHILLION PHARMACEUTICALS IN COM 00448Q201 11923 1105000 SH SOLE 1105000 0 0 ACLARIS THERAPEUTICS INC COM 00461U105 24142 896154 SH SOLE 896154 0 0 ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 9226 765001 SH SOLE 765001 0 0 ADURO BIOTECH INC COM 00739L101 11678 415000 SH SOLE 415000 0 0 ADVANCED ACCELERATOR APPLIC SPONSORED ADS 00790T100 25016 800000 SH SOLE 800000 0 0 AETNA INC NEW COM 00817Y108 44437 411000 SH SOLE 411000 0 0 AIMMUNE THERAPEUTICS INC COM 00900T107 4790 259646 SH SOLE 259646 0 0 ALEXION PHARMACEUTICALS INC COM 015351109 36815 193000 SH SOLE 193000 0 0 ALLERGAN PLC SHS G0177J108 50625 162000 SH SOLE 162000 0 0 ALLERGAN PLC PFD CONV SER A G0177J116 5136 5000 SH SOLE 5000 0 0 AMGEN INC COM 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