0001172661-17-001168.txt : 20170515 0001172661-17-001168.hdr.sgml : 20170515 20170515133750 ACCESSION NUMBER: 0001172661-17-001168 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20170331 FILED AS OF DATE: 20170515 DATE AS OF CHANGE: 20170515 EFFECTIVENESS DATE: 20170515 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: 17843008 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 03-31-2017 03-31-2017 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 05-15-2017 0 140 1733063 INFORMATION TABLE 2 infotable.xml ACADIA HEALTHCARE COMPANY IN COM 00404A109 55590 1275000 SH SOLE 1275000 0 0 ACHILLION PHARMACEUTICALS IN COM 00448Q201 6315 1500000 SH SOLE 1500000 0 0 ACLARIS THERAPEUTICS INC COM 00461U105 20129 675000 SH SOLE 675000 0 0 ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 4821 875000 SH SOLE 875000 0 0 ADURO BIOTECH INC COM 00739L101 4461 415000 SH SOLE 415000 0 0 ADVANCED ACCELERATOR APPLIC SPONSORED ADS 00790T100 33881 850000 SH SOLE 850000 0 0 AEGLEA BIOTHERAPEUTICS INC COM 00773J103 3904 524089 SH SOLE 524089 0 0 AETNA INC NEW COM 00817Y108 28061 220000 SH SOLE 220000 0 0 AIMMUNE THERAPEUTICS INC COM 00900T107 6367 293000 SH SOLE 293000 0 0 ALDER BIOPHARMACEUTICALS INC COM 014339105 3786 182000 SH SOLE 182000 0 0 ALEXION PHARMACEUTICALS INC COM 015351109 55395 456900 SH SOLE 456900 0 0 ALKERMES PLC SHS G01767105 7313 125000 SH SOLE 125000 0 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