0001172661-15-001184.txt : 20150515 0001172661-15-001184.hdr.sgml : 20150515 20150515130526 ACCESSION NUMBER: 0001172661-15-001184 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20150331 FILED AS OF DATE: 20150515 DATE AS OF CHANGE: 20150515 EFFECTIVENESS DATE: 20150515 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: 15867392 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 03-31-2015 03-31-2015 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 05-15-2015 0 105 1069136 INFORMATION TABLE 2 infotable.xml ABBVIE INC COM 00287Y109 35124 600000 SH SOLE 600000 0 0 ACADIA HEALTHCARE COMPANY IN COM 00404A109 25955 362500 SH SOLE 362500 0 0 ACHILLION PHARMACEUTICALS IN COM 00448Q201 5916 600000 SH SOLE 600000 0 0 ACTAVIS PLC SHS G0083B108 33482 112500 SH SOLE 112500 0 0 ACTAVIS PLC PFD CONV SER A G0083B116 5150 5000 SH SOLE 5000 0 0 ADVAXIS INC COM NEW 007624208 7076 490000 SH SOLE 490000 0 0 AERIE PHARMACEUTICALS INC COM 00771V108 4576 146000 SH SOLE 146000 0 0 AETNA INC NEW COM 00817Y108 16672 156500 SH SOLE 156500 0 0 ALEXION PHARMACEUTICALS INC COM 015351109 18760 108250 SH SOLE 108250 0 0 AMGEN INC COM 031162100 26215 164000 SH SOLE 164000 0 0 ANTHERA PHARMACEUTICALS INC COM NEW 03674U201 1900 425000 SH SOLE 425000 0 0 ASCENDIS PHARMA A S SPONSORED ADR 04351P101 617 35540 SH SOLE 35540 0 0 ASSEMBLY BIOSCIENCES INC COM 045396108 4204 317500 SH SOLE 317500 0 0 AVALANCHE BIOTECHNOLOGIES IN COM 05337G107 2857 70500 SH SOLE 70500 0 0 BENEFITFOCUS INC COM 08180D106 2759 75000 SH SOLE 75000 0 0 BIOGEN INC COM 09062X103 15623 37000 SH SOLE 37000 0 0 BIOMARIN PHARMACEUTICAL INC COM 09061G101 4050 32500 SH SOLE 32500 0 0 BLUEBIRD BIO INC COM 09609G100 3019 25000 SH SOLE 25000 0 0 CARDIOME PHARMA CORP COM NO PAR 14159U301 5232 565000 SH SOLE 565000 0 0 CASTLIGHT HEALTH INC CL B 14862Q100 4074 525000 SH SOLE 525000 0 0 CELGENE CORP COM 151020104 22422 194500 SH SOLE 194500 0 0 CELLECTIS S A SPONSORED ADS 15117K103 2594 75000 SH SOLE 75000 0 0 CERNER CORP COM 156782104 4396 60000 SH SOLE 60000 0 0 CERULEAN PHARMA INC COM 15708Q105 4865 540000 SH SOLE 540000 0 0 CHINA CORD BLOOD CORP SHS G21107100 4241 830000 SH SOLE 830000 0 0 CIGNA CORPORATION COM 125509109 15792 122000 SH SOLE 122000 0 0 COHERUS BIOSCIENCES INC COM 19249H103 6087 199051 SH SOLE 199051 0 0 CONNECTURE INC COM 20786J106 6210 600000 SH SOLE 600000 0 0 COOPER COS INC COM NEW 216648402 10121 54000 SH SOLE 54000 0 0 CVS HEALTH CORP COM 126650100 16926 164000 SH SOLE 164000 0 0 DANAHER CORP DEL COM 235851102 8957 105500 SH SOLE 105500 0 0 DAVITA HEALTHCARE PARTNERS I COM 23918K108 7315 90000 SH SOLE 90000 0 0 DERMIRA INC COM 24983L104 649 42274 SH SOLE 42274 0 0 ENTEROMEDICS INC COM NEW 29365M208 743 811760 SH SOLE 811760 0 0 ENVISION HEALTHCARE HLDGS IN COM 29413U103 21860 570000 SH SOLE 570000 0 0 EPIZYME INC COM 29428V104 5756 306500 SH SOLE 306500 0 0 FIBROGEN INC COM 31572Q808 4748 151300 SH SOLE 151300 0 0 FIVE PRIME THERAPEUTICS INC COM 33830X104 3108 136000 SH SOLE 136000 0 0 FLAMEL TECHNOLOGIES SA SPONSORED ADR 338488109 8271 460000 SH SOLE 460000 0 0 GILEAD SCIENCES INC COM 375558103 25023 255000 SH SOLE 255000 0 0 GW PHARMACEUTICALS PLC ADS 36197T103 6379 70000 SH SOLE 70000 0 0 HCA HOLDINGS INC COM 40412C101 31785 422500 SH SOLE 422500 0 0 HEALTHSOUTH CORP COM NEW 421924309 9759 220000 SH SOLE 220000 0 0 HEARTWARE INTL INC COM 422368100 9216 105000 SH SOLE 105000 0 0 HERON THERAPEUTICS INC COM 427746102 473 32500 SH SOLE 32500 0 0 HUMANA INC COM 444859102 19137 107500 SH SOLE 107500 0 0 ILLUMINA INC COM 452327109 4455 24000 SH SOLE 24000 0 0 INCYTE CORP COM 45337C102 10358 113000 SH SOLE 113000 0 0 INFINITY PHARMACEUTICALS INC COM 45665G303 3006 215000 SH SOLE 215000 0 0 INOVALON HLDGS INC COM CL A 45781D101 11329 375000 SH SOLE 375000 0 0 INSMED INC COM PAR $.01 457669307 7592 365000 SH SOLE 365000 0 0 INTERCEPT PHARMACEUTICALS IN COM 45845P108 10153 36000 SH SOLE 36000 0 0 INTUITIVE SURGICAL INC COM NEW 46120E602 11363 22500 SH SOLE 22500 0 0 INVITAE CORP COM 46185L103 2095 125000 SH SOLE 125000 0 0 JAZZ PHARMACEUTICALS PLC SHS USD G50871105 4493 26000 SH SOLE 26000 0 0 JUNO THERAPEUTICS INC COM 48205A109 7426 122426 SH SOLE 122426 0 0 KINDRED BIOSCIENCES INC COM 494577109 1964 275000 SH SOLE 275000 0 0 KITE PHARMA INC COM 49803L109 4123 71474 SH SOLE 71474 0 0 KYTHERA BIOPHARMACEUTICALS I COM 501570105 5767 115000 SH SOLE 115000 0 0 LABORATORY CORP AMER HLDGS COM NEW 50540R409 9457 75000 SH SOLE 75000 0 0 LILLY ELI & CO COM 532457108 16710 230000 SH SOLE 230000 0 0 MACROGENICS INC COM 556099109 3655 116500 SH SOLE 116500 0 0 MCKESSON CORP COM 58155Q103 33704 149000 SH SOLE 149000 0 0 MEDICINES CO COM 584688105 8406 300000 SH SOLE 300000 0 0 MEDTRONIC PLC SHS G5960L103 44634 572300 SH SOLE 572300 0 0 NEUROCRINE BIOSCIENCES INC COM 64125C109 14891 375000 SH SOLE 375000 0 0 NOVADAQ TECHNOLOGIES INC COM 66987G102 7714 475000 SH SOLE 475000 0 0 NOVAVAX INC COM 670002104 6037 730000 SH SOLE 730000 0 0 OREXIGEN THERAPEUTICS INC COM 686164104 12137 1550000 SH SOLE 1550000 0 0 PACIRA PHARMACEUTICALS INC COM 695127100 4509 50750 SH SOLE 50750 0 0 PERRIGO CO PLC SHS G97822103 7781 47000 SH SOLE 47000 0 0 PFIZER INC COM 717081103 26440 760000 SH SOLE 760000 0 0 PHARMACYCLICS INC COM 716933106 22524 88000 SH SOLE 88000 0 0 PRA HEALTH SCIENCES INC COM 69354M108 8219 285000 SH SOLE 285000 0 0 PROTHENA CORP PLC SHS G72800108 9058 237500 SH SOLE 237500 0 0 PTC THERAPEUTICS INC COM 69366J200 2464 40500 SH SOLE 40500 0 0 PUMA BIOTECHNOLOGY INC COM 74587V107 5726 24250 SH SOLE 24250 0 0 RADIUS HEALTH INC COM NEW 750469207 16464 400000 SH SOLE 400000 0 0 RAPTOR PHARMACEUTICAL CORP COM 75382F106 1685 155000 SH SOLE 155000 0 0 RECEPTOS INC COM 756207106 10718 65000 SH SOLE 65000 0 0 REGENERON PHARMACEUTICALS COM 75886F107 4515 10000 SH SOLE 10000 0 0 RELYPSA INC COM 759531106 7394 205000 SH SOLE 205000 0 0 RETROPHIN INC COM 761299106 16772 700000 SH SOLE 700000 0 0 ROKA BIOSCIENCE INC COM 775431109 800 250000 SH SOLE 250000 0 0 RTI SURGICAL INC COM 74975N105 9188 1860000 SH SOLE 1860000 0 0 SELECT SECTOR SPDR TR SBI HEALTHCARE 81369Y209 7975 110000 SH SOLE 110000 0 0 SPARK THERAPEUTICS INC COM 84652J103 2566 33106 SH SOLE 33106 0 0 STERICYCLE INC COM 858912108 10322 73500 SH SOLE 73500 0 0 STERIS CORP COM 859152100 6184 88000 SH SOLE 88000 0 0 TANDEM DIABETES CARE INC COM 875372104 6005 475800 SH SOLE 475800 0 0 TEAM HEALTH HOLDINGS INC COM 87817A107 18197 311000 SH SOLE 311000 0 0 TESARO INC COM 881569107 12054 210000 SH SOLE 210000 0 0 TETRAPHASE PHARMACEUTICALS I COM 88165N105 3756 102500 SH SOLE 102500 0 0 THERAVANCE BIOPHARMA INC COM G8807B106 6489 374000 SH SOLE 374000 0 0 THERMO FISHER SCIENTIFIC INC COM 883556102 13434 100000 SH SOLE 100000 0 0 THORATEC CORP COM NEW 885175307 21573 515000 SH SOLE 515000 0 0 TORNIER N V SHS N87237108 17305 660000 SH SOLE 660000 0 0 TRIVASCULAR TECHNOLOGIES INC COM 89685A102 2077 198000 SH SOLE 198000 0 0 ULTRAGENYX PHARMACEUTICAL IN COM 90400D108 5712 92000 SH SOLE 92000 0 0 VALEANT PHARMACEUTICALS INTL COM 91911K102 30786 155000 SH SOLE 155000 0 0 VERTEX PHARMACEUTICALS INC COM 92532F100 8022 68000 SH SOLE 68000 0 0 WELLCARE HEALTH PLANS INC COM 94946T106 5488 60000 SH SOLE 60000 0 0 WUXI PHARMATECH CAYMAN INC SPONS ADR SHS 929352102 6515 168000 SH SOLE 168000 0 0 XENOPORT INC COM 98411C100 2207 310000 SH SOLE 310000 0 0 ZS PHARMA INC COM 98979G105 6649 158000 SH SOLE 158000 0 0