Rock Springs Capital Management LP Diversified Active

Location: Baltimore, MD

CIK: 0001595725 · Show all filings

Period: Q1 2018 (← Previous) (Next →)

Filing Date: May 15, 2018

Total Value: $2.344B (98.9% shares, 1.1% debt)

Holdings (149)

UNH UNITEDHEALTH GROUP INC 4.5%
Value $104M Shares 487,500 Est. Cost $151.47 Unrealized +32.8%
ISRG INTUITIVE SURGICAL INC 2.5%
Value $59.41M Shares 143,900 Est. Cost $101.20 Unrealized +37.9%
ABBV ABBVIE INC 2.4%
Value $56.79M Shares 600,000 Est. Cost $78.53 Unrealized 0.0%
ALEXION PHARMACEUTICALS INC 2.3%
Value $54.06M Shares 485,000 Est. Cost $138.77 Unrealized
NBIX NEUROCRINE BIOSCIENCES INC 2.1%
Value $50.27M Shares 606,200 Est. Cost $37.82 Unrealized +123.3%
ACHC ACADIA HEALTHCARE COMPANY IN 2.1%
Value $49.11M Shares 1,253,500 Est. Cost $55.43 Unrealized -33.8%
COLL COLLEGIUM PHARMACEUTICAL INC 2.1%
Value $49.06M Shares 1,920,000 Est. Cost $15.97 Unrealized +49.2%
MOH MOLINA HEALTHCARE INC 2.0%
Value $46.76M Shares 576,000 Est. Cost $65.41 Unrealized +23.0%
SPARK THERAPEUTICS INC 1.8%
Value $41.52M Shares 623,500 Est. Cost $58.20 Unrealized
BMY BRISTOL MYERS SQUIBB CO 1.8%
Value $41.11M Shares 650,000 Est. Cost $47.70 Unrealized +0.8%
GW PHARMACEUTICALS PLC 1.7%
Value $40.56M Shares 360,000 Est. Cost $95.03 Unrealized
AETNA INC NEW 1.7%
Value $40.39M Shares 239,000 Est. Cost $124.56 Unrealized
MDGL MADRIGAL PHARMACEUTICALS INC 1.6%
Value $38.02M Shares 325,500 Est. Cost $23.28 Unrealized +430.2%
ONC BEIGENE LTD 1.6%
Value $37.17M Shares 221,250 Est. Cost $33.43 Unrealized
HCA HCA HEALTHCARE INC 1.6%
Value $36.86M Shares 380,000 Est. Cost $90.31 Unrealized 0.0%
LOXO ONCOLOGY INC 1.6%
Value $36.52M Shares 316,500 Est. Cost $59.62 Unrealized
RADIUS HEALTH INC 1.5%
Value $35.94M Shares 1,000,000 Est. Cost $43.95 Unrealized
PCRX PACIRA PHARMACEUTICALS INC 1.5%
Value $35.04M Shares 1,125,000 Est. Cost $48.64 Unrealized -26.8%
PRA HEALTH SCIENCES INC 1.4%
Value $32.77M Shares 395,000 Est. Cost $42.95 Unrealized
TESARO INC 1.4%
Value $32.74M Shares 573,000 Est. Cost $65.29 Unrealized
IRTC IRHYTHM TECHNOLOGIES INC 1.3%
Value $30.06M Shares 477,500 Est. Cost $48.06 Unrealized +28.8%
VRTX VERTEX PHARMACEUTICALS INC 1.3%
Value $29.5M Shares 181,000 Est. Cost $111.95 Unrealized +45.9%
SYK STRYKER CORP 1.2%
Value $28.64M Shares 178,000 Est. Cost $141.99 Unrealized +4.2%
PEN PENUMBRA INC 1.2%
Value $28.1M Shares 243,000 Est. Cost $48.06 Unrealized +114.9%
PBYI PUMA BIOTECHNOLOGY INC 1.2%
Value $28.1M Shares 412,900 Est. Cost $77.81 Unrealized -3.8%
CELGENE CORP 1.2%
Value $27.66M Shares 310,100 Est. Cost $117.55 Unrealized
DVA DAVITA INC 1.1%
Value $26.87M Shares 407,500 Est. Cost $71.11 Unrealized +3.3%
EW EDWARDS LIFESCIENCES CORP 1.1%
Value $26.51M Shares 190,001 Est. Cost $31.99 Unrealized +35.7%
WELLCARE HEALTH PLANS INC 1.1%
Value $25.95M Shares 134,000 Est. Cost $79.73 Unrealized
COR AMERISOURCEBERGEN CORP 1.1%
Value $25.43M Shares 295,000 Est. Cost $73.93 Unrealized 0.0%
TMO THERMO FISHER SCIENTIFIC INC 1.0%
Value $23.64M Shares 114,500 Est. Cost $165.72 Unrealized +24.0%
GILD GILEAD SCIENCES INC 1.0%
Value $23.63M Shares 313,400 Est. Cost $54.83 Unrealized +7.5%
TFX TELEFLEX INC 1.0%
Value $23.59M Shares 92,500 Est. Cost $239.92 Unrealized +4.7%
AVEXIS INC 1.0%
Value $23.48M Shares 190,000 Est. Cost $44.96 Unrealized
MEDICINES CO 1.0%
Value $22.73M Shares 690,000 Est. Cost $33.00 Unrealized
EPIZYME INC 1.0%
Value $22.63M Shares 1,275,000 Est. Cost $16.49 Unrealized
ASSEMBLY BIOSCIENCES INC 0.9%
Value $21.77M Shares 443,000 Est. Cost $16.69 Unrealized
MERSANA THERAPEUTICS INC 0.9%
Value $20.5M Shares 1,300,000 Est. Cost $13.97 Unrealized
WRIGHT MED GROUP N V 0.8%
Value $19.84M Shares 1,000,000 Est. Cost $22.12 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.8%
Value $19.43M Shares 1,529,800 Est. Cost $13.78 Unrealized
BAX BAXTER INTL INC 0.8%
Value $19.32M Shares 297,000 Est. Cost $51.31 Unrealized +14.8%
SRPT SAREPTA THERAPEUTICS INC 0.8%
Value $19.11M Shares 258,000 Est. Cost $32.85 Unrealized +103.0%
EHC ENCOMPASS HEALTH CORP 0.8%
Value $18.7M Shares 327,000 Est. Cost $38.63 Unrealized 0.0%
JAZZ JAZZ PHARMACEUTICALS PLC 0.8%
Value $18.68M Shares 123,700 Est. Cost $146.27 Unrealized +0.3%
INSM INSMED INC 0.8%
Value $18.58M Shares 825,000 Est. Cost $19.73 Unrealized +33.4%
ASND ASCENDIS PHARMA A S 0.8%
Value $18.54M Shares 283,500 Est. Cost $18.03 Unrealized
GLPG GALAPAGOS NV 0.8%
Value $18.46M Shares 185,000 Est. Cost $50.00 Unrealized
AXGN AXOGEN INC 0.8%
Value $18.43M Shares 505,000 Est. Cost $16.14 Unrealized +90.1%
ALNY ALNYLAM PHARMACEUTICALS INC 0.7%
Value $17.03M Shares 143,000 Est. Cost $80.61 Unrealized +59.9%
AUDENTES THERAPEUTICS INC 0.7%
Value $16.98M Shares 565,000 Est. Cost $18.85 Unrealized
ALGN ALIGN TECHNOLOGY INC 0.7%
Value $16.45M Shares 65,500 Est. Cost $163.51 Unrealized +57.1%
INTERSECT ENT INC 0.7%
Value $16.11M Shares 410,000 Est. Cost $27.86 Unrealized
ZBH ZIMMER BIOMET HLDGS INC 0.7%
Value $16.08M Shares 147,500 Est. Cost $105.47 Unrealized +3.2%
NUVASIVE INC 0.7%
Value $15.92M Shares 305,000 Est. Cost $52.21 Unrealized
TBPH THERAVANCE BIOPHARMA INC 0.7%
Value $15.83M Shares 652,600 Est. Cost $20.11 Unrealized +36.6%
INCY INCYTE CORP 0.6%
Value $15.21M Shares 182,500 Est. Cost $67.79 Unrealized +33.0%
FOLD AMICUS THERAPEUTICS INC 0.6%
Value $15.04M Shares 1,000,000 Est. Cost $11.48 Unrealized +32.6%
HOLX HOLOGIC INC 0.6%
Value $14.94M Shares 400,000 Est. Cost $39.97 Unrealized +1.1%
EXAS EXACT SCIENCES CORP 0.6%
Value $14.94M Shares 370,500 Est. Cost $20.61 Unrealized +136.7%
ARENA PHARMACEUTICALS INC 0.6%
Value $14.81M Shares 375,000 Est. Cost $31.48 Unrealized
BIIB BIOGEN INC 0.6%
Value $14.51M Shares 53,000 Est. Cost $273.10 Unrealized +13.7%
BLUEPRINT MEDICINES CORP 0.6%
Value $14.47M Shares 157,753 Est. Cost $73.42 Unrealized
FIBROGEN INC 0.6%
Value $14.3M Shares 309,500 Est. Cost $29.90 Unrealized
ANAB ANAPTYSBIO INC 0.6%
Value $14.05M Shares 135,000 Est. Cost $26.97 Unrealized +317.8%
INGN INOGEN INC 0.6%
Value $13.57M Shares 110,500 Est. Cost $113.42 Unrealized +7.6%
HRTX HERON THERAPEUTICS INC 0.6%
Value $13.14M Shares 476,000 Est. Cost $19.33 Unrealized +17.3%
MENLO THERAPEUTICS INC 0.5%
Value $12.4M Shares 330,000 Est. Cost $37.58 Unrealized
CLOVIS ONCOLOGY INC 0.5%
Value $12.22M Shares 231,500 Est. Cost $56.13 Unrealized
IDXX IDEXX LABS INC 0.5%
Value $12.06M Shares 63,000 Est. Cost $184.56 Unrealized 0.0%
AMARIN CORP PLC 0.5%
Value $12.04M Shares 4,000,000 Est. Cost $3.19 Unrealized
PRTA PROTHENA CORP PLC 0.5%
Value $11.69M Shares 318,500 Est. Cost $29.47 Unrealized +23.4%
ARDX ARDELYX INC 0.5%
Value $11.49M Shares 2,275,557 Est. Cost $10.47 Unrealized -40.4%
OBSEVA SA 0.5%
Value $11.33M Shares 840,000 Est. Cost $10.41 Unrealized
HOMOLOGY MEDICINES INC 0.5%
Value $10.75M Shares 575,000 Est. Cost $18.70 Unrealized
G1 THERAPEUTICS INC 0.5%
Value $10.63M Shares 287,000 Est. Cost $22.39 Unrealized
PORTOLA PHARMACEUTICALS INC 0.5%
Value $10.57M Shares 323,800 Est. Cost $54.95 Unrealized
CLEARSIDE BIOMEDICAL INC 0.4%
Value $10.46M Shares 975,000 Est. Cost $7.16 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.4%
Value $10.13M Shares 125,000 Est. Cost $100.37 Unrealized -14.5%
FIVE PRIME THERAPEUTICS INC 0.4%
Value $10.06M Shares 585,500 Est. Cost $23.18 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.4%
Value $9.826M Shares 875,000 Est. Cost $15.34 Unrealized
ACRS ACLARIS THERAPEUTICS INC 0.4%
Value $9.286M Shares 530,000 Est. Cost $20.17 Unrealized +5.1%
RIGEL PHARMACEUTICALS INC 0.4%
Value $9.116M Shares 2,575,000 Est. Cost $3.42 Unrealized
ZOGENIX INC 0.4%
Value $9.031M Shares 225,500 Est. Cost $37.83 Unrealized
CORBF GLOBAL CORD BLOOD CORPORATIO 0.4%
Value $8.976M Shares 880,000 Est. Cost $10.11 Unrealized 0.0%
RTI SURGICAL INC 0.4%
Value $8.97M Shares 1,950,000 Est. Cost $4.35 Unrealized
RETROPHIN INC 0.4%
Value $8.944M Shares 400,000 Est. Cost $23.91 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.4%
Value $8.821M Shares 173,000 Est. Cost $61.13 Unrealized -17.6%
ZTS ZOETIS INC 0.4%
Value $8.435M Shares 101,000 Est. Cost $74.07 Unrealized 0.0%
BIOHAVEN PHARMACTL HLDG CO L 0.4%
Value $8.372M Shares 325,000 Est. Cost $25.19 Unrealized
ACHILLION PHARMACEUTICALS IN 0.4%
Value $8.348M Shares 2,250,000 Est. Cost $7.47 Unrealized
ODONATE THERAPEUTICS INC 0.3%
Value $8.123M Shares 383,500 Est. Cost $25.00 Unrealized
SAGE THERAPEUTICS INC 0.3%
Value $7.892M Shares 49,000 Est. Cost $96.49 Unrealized
BLUEBIRD BIO INC 0.3%
Value $7.684M Shares 45,000 Est. Cost $123.84 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.3%
Value $7.68M Shares 695,000 Est. Cost $21.31 Unrealized -48.7%
SPRO SPERO THERAPEUTICS INC 0.3%
Value $7.481M Shares 525,000 Est. Cost $12.27 Unrealized -1.2%
GLOBAL BLOOD THERAPEUTICS IN 0.3%
Value $7.245M Shares 150,000 Est. Cost $34.94 Unrealized
MGNX MACROGENICS INC 0.3%
Value $6.919M Shares 275,000 Est. Cost $30.95 Unrealized -21.5%
CRVS CORVUS PHARMACEUTICALS INC 0.3%
Value $6.63M Shares 575,000 Est. Cost $13.05 Unrealized -27.5%
IMMUNOMEDICS INC 0.3%
Value $6.575M Shares 450,000 Est. Cost $14.61 Unrealized
INVITAE CORP 0.3%
Value $6.566M Shares 1,400,000 Est. Cost $10.13 Unrealized
LA JOLLA PHARMACEUTICAL CO 0.3%
Value $6.552M Shares 220,000 Est. Cost $29.78 Unrealized
CYMABAY THERAPEUTICS INC 0.3%
Value $6.365M Shares 490,000 Est. Cost $8.46 Unrealized
ZLAB ZAI LAB LTD 0.3%
Value $6.298M Shares 295,000 Est. Cost $27.00 Unrealized
GTX INC DEL 0.3%
Value $6.284M Shares 354,000 Est. Cost $17.75 Unrealized
MYOVANT SCIENCES LTD 0.3%
Value $6.277M Shares 295,100 Est. Cost $13.79 Unrealized
MOMENTA PHARMACEUTICALS INC 0.3%
Value $6.262M Shares 345,000 Est. Cost $18.15 Unrealized
ENDOCYTE INC 0.3%
Value $6.136M Shares 675,000 Est. Cost $9.09 Unrealized
A AGILENT TECHNOLOGIES INC 0.3%
Value $6.121M Shares 91,500 Est. Cost $66.14 Unrealized 0.0%
PARATEK PHARMACEUTICALS INC 0.2%
Value $5.85M Shares 450,000 Est. Cost $15.77 Unrealized
MIRATI THERAPEUTICS INC 0.2%
Value $5.802M Shares 189,000 Est. Cost $18.84 Unrealized
NOVAVAX INC 0.2%
Value $5.775M Shares 2,750,000 Est. Cost $2.75 Unrealized
THERAPEUTICSMD INC 0.2%
Value $5.712M Shares 1,172,800 Est. Cost $7.12 Unrealized
SHIRE PLC 0.2%
Value $5.602M Shares 37,500 Est. Cost $149.39 Unrealized
INSMED INC 0.2%
Value $5.358M Shares 6,000,000 Est. Cost $0.89 Unrealized
CLEMENTIA PHARMACEUTICALS IN 0.2%
Value $5.227M Shares 345,000 Est. Cost $16.89 Unrealized
ADVERUM BIOTECHNOLOGIES INC 0.2%
Value $5.22M Shares 900,000 Est. Cost $5.80 Unrealized
AEGLEA BIOTHERAPEUTICS INC 0.2%
Value $5.199M Shares 524,089 Est. Cost $4.86 Unrealized
AIMMUNE THERAPEUTICS INC 0.2%
Value $5.093M Shares 160,000 Est. Cost $22.58 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.2%
Value $4.982M Shares 251,000 Est. Cost $22.57 Unrealized
PRTA PROTHENA CORP PLC 0.2%
Value $4.956M Shares 135,000 Est. Cost $29.47 Unrealized +23.4%
MEDICINES CO 0.2%
Value $4.82M Shares 5,000,000 Est. Cost $1.05 Unrealized
DERMIRA INC 0.2%
Value $4.794M Shares 600,000 Est. Cost $17.84 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.2%
Value $4.626M Shares 5,000,000 Est. Cost $0.93 Unrealized
BCRX BIOCRYST PHARMACEUTICALS 0.2%
Value $4.412M Shares 925,000 Est. Cost $5.01 Unrealized +2.5%
INTRA CELLULAR THERAPIES INC 0.2%
Value $3.947M Shares 187,500 Est. Cost $39.54 Unrealized
EXEL EXELIXIS INC 0.2%
Value $3.876M Shares 175,000 Est. Cost $11.85 Unrealized +133.3%
CGEN COMPUGEN LTD 0.2%
Value $3.671M Shares 825,000 Est. Cost $6.07 Unrealized -44.5%
MEDICINES CO 0.1%
Value $3.462M Shares 3,000,000 Est. Cost $1.14 Unrealized
MERUS N V 0.1%
Value $3.241M Shares 174,917 Est. Cost $9.33 Unrealized
PROTEOSTASIS THERAPEUTICS IN 0.1%
Value $3.206M Shares 675,000 Est. Cost $8.68 Unrealized
RA PHARMACEUTICALS INC 0.1%
Value $3.186M Shares 600,000 Est. Cost $15.19 Unrealized
EGALET CORP 0.1%
Value $3.159M Shares 7,800,000 Est. Cost $0.76 Unrealized
NABRIVA THERAPEUTICS PLC 0.1%
Value $3.144M Shares 625,000 Est. Cost $10.11 Unrealized
ALLERGAN PLC 0.1%
Value $2.973M Shares 17,665 Est. Cost $168.30 Unrealized
CARDIOME PHARMA CORP 0.1%
Value $2.784M Shares 1,200,000 Est. Cost $8.88 Unrealized
RESTORBIO INC 0.1%
Value $2.635M Shares 275,000 Est. Cost $9.58 Unrealized
DBV TECHNOLOGIES S A 0.1%
Value $1.684M Shares 73,000 Est. Cost $33.59 Unrealized
SERES THERAPEUTICS INC 0.1%
Value $1.615M Shares 220,000 Est. Cost $38.95 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value $1.515M Shares 1,500,000 Est. Cost $1.14 Unrealized
RADIUS HEALTH INC 0.1%
Value $1.512M Shares 1,500,000 Est. Cost $1.01 Unrealized
RYTM RHYTHM PHARMACEUTICALS INC 0.1%
Value $1.423M Shares 71,500 Est. Cost $26.40 Unrealized +0.6%
CIDARA THERAPEUTICS INC 0.1%
Value $1.2M Shares 300,000 Est. Cost $13.32 Unrealized
SCYNEXIS INC 0.0%
Value $1.099M Shares 820,000 Est. Cost $6.33 Unrealized
WRIGHT MED GROUP INC 0.0%
Value $1.001M Shares 1,000,000 Est. Cost $0.90 Unrealized
SOLID BIOSCIENCES INC 0.0%
Value $938K Shares 125,000 Est. Cost $7.50 Unrealized
PACIRA PHARMACEUTICALS INC 0.0%
Value $912K Shares 1,000,000 Est. Cost $0.91 Unrealized
CHIASMA INC 0.0%
Value $788K Shares 525,000 Est. Cost $18.65 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.0%
Value $567K Shares 270,000 Est. Cost $11.28 Unrealized -81.0%
KURA KURA ONCOLOGY INC 0.0%
Value $497K Shares 26,500 Est. Cost $19.47 Unrealized 0.0%