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Rock Springs Capital Management LP

Q4 2017 Holdings

Filed 2018-02-14 | 145 holdings | $232.8M | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Acadia Healthcare Company in(ACHC)COM00404A109$40.9M1,253,50017.6%
Collegium Pharmaceutical Inc(COLL)COM19459J104$34.8M1,885,72915.0%
Beigene LTD(ONC)SPONSORED ADR07725L102$26.0M266,00011.2%
Biogen Inc(BIIB)COM09062X103$16.9M53,0007.3%
Alnylam Pharmaceuticals Inc(ALNY)COM02043Q107$16.5M130,0007.1%
Ardelyx Inc(ARDX)COM039697107$15.0M2,275,5576.5%
Align Technology Inc(ALGN)COM016255101$14.8M66,7506.4%
Axogen Inc(AXGN)COM05463X106$13.5M477,5005.8%
Ascendis Pharma A S(ASND)SPONSORED ADR04351P101$11.2M280,0004.8%
Biomarin Pharmaceutical Inc(BMRN)COM09061G101$11.1M125,0004.8%
Aclaris Therapeutics Inc(ACRS)COM00461U105$10.2M415,0004.4%
Adaptimmune Therapeutics PLC(ADAPY)SPONDS ADR00653A107$5.8M875,0002.5%
Coherus Biosciences Inc(CHRS)COM19249H103$5.5M629,5002.4%
Corvus Pharmaceuticals Inc(CRVS)COM221015100$4.4M422,6001.9%
Biocryst Pharmaceuticals(BCRX)COM09058V103$4.0M812,5001.7%
Unitedhealth Group Inc(UNH)COM91324P102$107.4K487,0000.0%
Advanced Accelerator ApplicSPONSORED ADS00790T100$67.4K825,5000.0%
Cigna CorporationCOM125509109$65.2K321,0000.0%
Alexion Pharmaceuticals Inc(ALXN)COM015351109$57.4K480,0000.0%
Intuitive Surgical Inc(ISRG)COM NEW46120E602$52.5K143,9000.0%
Pacira Pharmaceuticals Inc(PCRX)COM695127100$50.5K1,106,7000.0%
Merck & Co Inc(MRK)COM58933Y105$47.9K850,7000.0%
GW Pharmaceuticals PLCADS36197T103$46.7K354,0000.0%
Tesaro IncCOM881569107$45.5K548,5000.0%
PRA Health Sciences Inc(PRAH)COM69354M108$43.5K477,5000.0%
Molina Healthcare Inc(MOH)COM60855R100$43.5K567,0000.0%
Aetna Inc NewCOM00817Y108$43.1K239,0000.0%
Neurocrine Biosciences Inc(NBIX)COM64125C109$37.7K486,0000.0%
Puma Biotechnology Inc(PBYI)COM74587V107$36.9K373,5000.0%
Spark Therapeutics IncCOM84652J103$31.6K615,0000.0%
Celgene Corp(CELG)COM151020104$31.6K303,0000.0%
Madrigal Pharmaceuticals Inc(MDGL)COM558868105$31.4K342,0000.0%
Radius Health IncCOM NEW750469207$30.0K943,0000.0%
Penumbra Inc(PEN)COM70975L107$29.2K310,5000.0%
Johnson & Johnson(JNJ)COM478160104$27.9K200,0000.0%
Wellcare Health Plans IncCOM94946T106$26.9K134,0000.0%
Loxo Oncology IncCOM548862101$26.1K310,0000.0%
Vertex Pharmaceuticals Inc(VRTX)COM92532F100$25.7K171,2500.0%
Exact Sciences Corp(EXAS)COM30063P105$22.9K434,9000.0%
Teleflex Inc(TFX)COM879369106$22.8K91,7500.0%
Irhythm Technologies Inc(IRTC)COM450056106$22.8K406,0000.0%
Gilead Sciences Inc(GILD)COM375558103$22.5K313,4000.0%
Mersana Therapeutics IncCOM59045L106$21.8K1,326,8000.0%
Edwards Lifesciences Corp(EW)COM28176E108$21.4K190,0010.0%
Thermo Fisher Scientific Inc(TMO)COM883556102$20.9K110,0000.0%
Assembly Biosciences IncCOM045396108$20.4K450,0000.0%
Stryker Corp(SYK)COM863667101$19.6K126,5000.0%
Avexis IncCOM05366U100$19.4K175,0000.0%
Insmed Inc(INSM)COM PAR $.01457669307$19.1K613,5000.0%
Medicines CoCOM584688105$18.9K690,0000.0%
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