Rock Springs Capital Management LP Q4 2017 Filing

Filed February 14, 2018

Portfolio Value

$2.2B

Holdings

144

Report Date

Q4 2017

Filing Type

13F-HR

All Holdings (144 positions)

StockValue
UNHUNITEDHEALTH GROUP INC
$107.4M
ADVANCED ACCELERATOR APPLIC
$67.4M
CICIGNA CORPORATION
$65.2M
ALXNALEXION PHARMACEUTICALS INC
$57.4M
ISRGINTUITIVE SURGICAL INC
$52.5M
PCRXPACIRA PHARMACEUTICALS INC
$50.5M
MRKMERCK & CO INC
$47.9M
GW PHARMACEUTICALS PLC
$46.7M
TESARO INC
$45.5M
PRAHPRA HEALTH SCIENCES INC
$43.5M
MOHMOLINA HEALTHCARE INC
$43.5M
AETNA INC NEW
$43.1M
ACHCACADIA HEALTHCARE COMPANY IN
$40.9M
NBIXNEUROCRINE BIOSCIENCES INC
$37.7M
PBYIPUMA BIOTECHNOLOGY INC
$36.9M
COLLCOLLEGIUM PHARMACEUTICAL INC
$34.8M
SPARK THERAPEUTICS INC
$31.6M
CELGCELGENE CORP
$31.6M
MDGLMADRIGAL PHARMACEUTICALS INC
$31.4M
RADIUS HEALTH INC
$30.0M
PENPENUMBRA INC
$29.2M
JNJJOHNSON & JOHNSON
$27.9M
WCGEURWELLCARE HEALTH PLANS INC
$26.9M
LOXO ONCOLOGY INC
$26.1M
ONCBEIGENE LTD
$26.0M
VRTXVERTEX PHARMACEUTICALS INC
$25.7M
EXASEXACT SCIENCES CORP
$22.9M
TFXTELEFLEX INC
$22.8M
IRTCIRHYTHM TECHNOLOGIES INC
$22.8M
GILDGILEAD SCIENCES INC
$22.5M
MERSANA THERAPEUTICS INC
$21.8M
EWEDWARDS LIFESCIENCES CORP
$21.4M
TMOTHERMO FISHER SCIENTIFIC INC
$20.9M
ASMBASSEMBLY BIOSCIENCES INC
$20.4M
SYKSTRYKER CORP
$19.6M
AVEXIS INC
$19.4M
IM8NINSMED INC
$19.1M
MEDICINES CO
$18.9M
WTWWILLIS TOWERS WATSON PUB LTD
$18.5M
TBPHTHERAVANCE BIOPHARMA INC
$18.2M
GLPGGALAPAGOS NV
$17.3M
INCYINCYTE CORP
$17.3M
BIIBBIOGEN INC
$16.9M
JAZZJAZZ PHARMACEUTICALS PLC
$16.7M
EPIZYME INC
$16.6M
ALNYALNYLAM PHARMACEUTICALS INC
$16.5M
AUDENTES THERAPEUTICS INC
$16.4M
AMRNAMARIN CORP PLC
$15.8M
PORTOLA PHARMACEUTICALS INC
$15.8M
CLVSEURCLOVIS ONCOLOGY INC
$15.7M
WRIGHT MED GROUP N V
$15.5M
FGENEURFIBROGEN INC
$15.4M
ARDXARDELYX INC
$15.0M
BAXBAXTER INTL INC
$14.9M
AFWALIGN TECHNOLOGY INC
$14.8M
ZBHZIMMER BIOMET HLDGS INC
$14.4M
SRPTSAREPTA THERAPEUTICS INC
$14.4M
ANABANAPTYSBIO INC
$14.3M
HOLXHOLOGIC INC
$14.3M
AXGNAXOGEN INC
$13.5M
AM6AMICUS THERAPEUTICS INC
$13.1M
HEALTHSOUTH CORP
$13.1M
PRTAPROTHENA CORP PLC
$12.6M
ALDER BIOPHARMACEUTICALS INC
$12.1M
NVTA1EURINVITAE CORP
$11.9M
DERMIRA INC
$11.7M
ASNDASCENDIS PHARMA A S
$11.2M
INTERSECT ENT INC
$11.2M
BMRNBIOMARIN PHARMACEUTICAL INC
$11.1M
AIMMUNE THERAPEUTICS INC
$11.1M
2L9BLUEPRINT MEDICINES CORP
$11.0M
JUNO THERAPEUTICS INC
$10.5M
ODONATE THERAPEUTICS INC
$10.3M
ACRSACLARIS THERAPEUTICS INC
$10.2M
RIGLUSDRIGEL PHARMACEUTICALS INC
$9.6M
INGNINOGEN INC
$9.5M
FIVE PRIME THERAPEUTICS INC
$9.3M
HQYHEALTHEQUITY INC
$9.1M
ZOGENIX INC
$9.0M
CHINA CORD BLOOD CORP
$8.8M
RETROPHIN INC
$8.4M
OBSEVA SA
$8.2M
ALMOST FAMILY INC
$8.2M
PARATEK PHARMACEUTICALS INC
$8.1M
BLUEBIRD BIO INC
$8.0M
RTI SURGICAL INC
$8.0M
RAREULTRAGENYX PHARMACEUTICAL IN
$7.6M
SG7SAGE THERAPEUTICS INC
$7.4M
ARNAEURARENA PHARMACEUTICALS INC
$7.3M
THERAPEUTICSMD INC
$7.1M
SGENEURSEATTLE GENETICS INC
$6.7M
BIOHAVEN PHARMACTL HLDG CO L
$6.6M
CLEMENTIA PHARMACEUTICALS IN
$6.5M
CLSDUSDCLEARSIDE BIOMEDICAL INC
$6.5M
ACHILLION PHARMACEUTICALS IN
$6.5M
STERIS PLC
$6.5M
ZLABZAI LAB LTD
$6.3M
ABLYNX NV
$6.2M
SPROSPERO THERAPEUTICS INC
$6.2M
TTPHEURTETRAPHASE PHARMACEUTICALS I
$6.0M
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