0001172661-18-001147.txt : 20180515 0001172661-18-001147.hdr.sgml : 20180515 20180515094318 ACCESSION NUMBER: 0001172661-18-001147 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20180331 FILED AS OF DATE: 20180515 DATE AS OF CHANGE: 20180515 EFFECTIVENESS DATE: 20180515 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: 18833648 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 03-31-2018 03-31-2018 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 05-15-2018 0 149 2344209 INFORMATION TABLE 2 infotable.xml ABBVIE INC COM 00287Y109 56790 600000 SH SOLE 600000 0 0 ACADIA HEALTHCARE COMPANY IN COM 00404A109 49112 1253500 SH SOLE 1253500 0 0 ACHILLION PHARMACEUTICALS IN COM 00448Q201 8348 2250000 SH SOLE 2250000 0 0 ACLARIS THERAPEUTICS INC COM 00461U105 9286 530000 SH SOLE 530000 0 0 ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 9826 875000 SH SOLE 875000 0 0 ADVERUM BIOTECHNOLOGIES INC COM 00773U108 5220 900000 SH SOLE 900000 0 0 AEGLEA BIOTHERAPEUTICS INC COM 00773J103 5199 524089 SH SOLE 524089 0 0 AETNA INC NEW COM 00817Y108 40391 239000 SH SOLE 239000 0 0 AGILENT TECHNOLOGIES INC COM 00846U101 6121 91500 SH SOLE 91500 0 0 AIMMUNE THERAPEUTICS INC COM 00900T107 5093 160000 SH SOLE 160000 0 0 ALDER BIOPHARMACEUTICALS INC COM 014339105 19428 1529800 SH SOLE 1529800 0 0 ALDER BIOPHARMACEUTICALS INC NOTE 2.500% 2/0 014339AA3 4626 5000000 PRN SOLE 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