0001172661-18-002092.txt : 20181114 0001172661-18-002092.hdr.sgml : 20181114 20181114103143 ACCESSION NUMBER: 0001172661-18-002092 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20180930 FILED AS OF DATE: 20181114 DATE AS OF CHANGE: 20181114 EFFECTIVENESS DATE: 20181114 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: 181181203 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 09-30-2018 09-30-2018 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 11-14-2018 0 144 2762039 INFORMATION TABLE 2 infotable.xml ABBVIE INC COM 00287Y109 30739 325000 SH SOLE 325000 0 0 ACADIA HEALTHCARE COMPANY IN COM 00404A109 24640 700000 SH SOLE 700000 0 0 ACHILLION PHARMACEUTICALS IN COM 00448Q201 8832 2400000 SH SOLE 2400000 0 0 ACLARIS THERAPEUTICS INC COM 00461U105 12778 880000 SH SOLE 880000 0 0 ADAPTIMMUNE THERAPEUTICS PLC SPONDS ADR 00653A107 10170 750000 SH SOLE 750000 0 0 ADVERUM BIOTECHNOLOGIES INC COM 00773U108 5445 900000 SH SOLE 900000 0 0 AEGLEA BIOTHERAPEUTICS INC COM 00773J103 6221 650000 SH SOLE 650000 0 0 AGILENT TECHNOLOGIES INC COM 00846U101 11576 164100 SH SOLE 164100 0 0 ALDER BIOPHARMACEUTICALS INC COM 014339105 27181 1632500 SH SOLE 1632500 0 0 ALDER BIOPHARMACEUTICALS INC NOTE 2.500% 2/0 014339AA3 5362 5000000 PRN SOLE 5000000 0 0 ALEXION PHARMACEUTICALS INC COM 015351109 41703 300000 SH SOLE 300000 0 0 ALIGN TECHNOLOGY INC COM 016255101 26407 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