Rock Springs Capital Management LP Diversified Active

Location: Baltimore, MD

CIK: 0001595725 · Show all filings

Period: Q2 2018 (← Previous) (Next →)

Filing Date: Aug 14, 2018

Total Value: $2.599B (98.9% shares, 1.1% debt)

Holdings (147)

UNH UNITEDHEALTH GROUP INC 5.4%
Value $139M Shares 567,500 Est. Cost $160.02 Unrealized +32.5%
MDGL MADRIGAL PHARMACEUTICALS INC 3.7%
Value $95.74M Shares 342,300 Est. Cost $30.76 Unrealized +470.9%
ISRG INTUITIVE SURGICAL INC 2.6%
Value $67.9M Shares 141,900 Est. Cost $101.20 Unrealized +50.7%
NBIX NEUROCRINE BIOSCIENCES INC 2.4%
Value $61.93M Shares 630,400 Est. Cost $39.80 Unrealized +124.9%
GW PHARMACEUTICALS PLC 2.4%
Value $61.4M Shares 440,000 Est. Cost $103.12 Unrealized
ALEXION PHARMACEUTICALS INC 2.4%
Value $61.14M Shares 492,500 Est. Cost $138.55 Unrealized
ABBV ABBVIE INC 2.1%
Value $55.59M Shares 600,000 Est. Cost $78.53 Unrealized -10.2%
WELLCARE HEALTH PLANS INC 2.1%
Value $54.91M Shares 223,000 Est. Cost $146.18 Unrealized
MOH MOLINA HEALTHCARE INC 2.1%
Value $53.38M Shares 545,000 Est. Cost $65.41 Unrealized +33.3%
ACHC ACADIA HEALTHCARE COMPANY IN 2.0%
Value $51.28M Shares 1,253,500 Est. Cost $55.43 Unrealized -27.2%
LOXO ONCOLOGY INC 1.9%
Value $50.29M Shares 289,900 Est. Cost $59.62 Unrealized
SPARK THERAPEUTICS INC 1.7%
Value $45.02M Shares 544,000 Est. Cost $58.20 Unrealized
HCA HCA HEALTHCARE INC 1.7%
Value $44.12M Shares 430,000 Est. Cost $90.79 Unrealized +4.1%
COLL COLLEGIUM PHARMACEUTICAL INC 1.5%
Value $39.35M Shares 1,650,000 Est. Cost $15.97 Unrealized +54.0%
SRPT SAREPTA THERAPEUTICS INC 1.5%
Value $39.32M Shares 297,500 Est. Cost $41.01 Unrealized +130.0%
IRTC IRHYTHM TECHNOLOGIES INC 1.5%
Value $38.94M Shares 480,000 Est. Cost $48.06 Unrealized +45.5%
PCRX PACIRA PHARMACEUTICALS INC 1.5%
Value $38.4M Shares 1,198,000 Est. Cost $47.78 Unrealized -27.7%
RADIUS HEALTH INC 1.3%
Value $33.15M Shares 1,125,000 Est. Cost $42.34 Unrealized
ONC BEIGENE LTD 1.3%
Value $33.05M Shares 215,000 Est. Cost $33.43 Unrealized
PEN PENUMBRA INC 1.3%
Value $32.71M Shares 236,750 Est. Cost $48.06 Unrealized +196.2%
VRTX VERTEX PHARMACEUTICALS INC 1.2%
Value $32.38M Shares 190,500 Est. Cost $114.10 Unrealized +35.9%
EHC ENCOMPASS HEALTH CORP 1.2%
Value $30.47M Shares 450,000 Est. Cost $40.44 Unrealized +11.9%
SYK STRYKER CORP 1.2%
Value $30.06M Shares 178,000 Est. Cost $141.99 Unrealized +9.0%
CELGENE CORP 1.1%
Value $28.62M Shares 360,400 Est. Cost $112.23 Unrealized
DVA DAVITA INC 1.1%
Value $28.37M Shares 408,500 Est. Cost $71.11 Unrealized -6.0%
PBYI PUMA BIOTECHNOLOGY INC 1.1%
Value $28.14M Shares 475,800 Est. Cost $75.19 Unrealized -22.9%
TESARO INC 1.1%
Value $27.81M Shares 625,400 Est. Cost $63.55 Unrealized
AXGN AXOGEN INC 1.1%
Value $27.39M Shares 545,000 Est. Cost $18.19 Unrealized +142.3%
PRA HEALTH SCIENCES INC 1.0%
Value $26.91M Shares 288,247 Est. Cost $42.95 Unrealized
WRIGHT MED GROUP N V 1.0%
Value $25.96M Shares 1,000,000 Est. Cost $22.12 Unrealized
GILD GILEAD SCIENCES INC 1.0%
Value $25.86M Shares 365,000 Est. Cost $54.53 Unrealized -3.3%
MEDICINES CO 1.0%
Value $25.32M Shares 690,000 Est. Cost $33.00 Unrealized
TFX TELEFLEX INC 1.0%
Value $24.81M Shares 92,500 Est. Cost $239.92 Unrealized +6.9%
ALDER BIOPHARMACEUTICALS INC 1.0%
Value $24.73M Shares 1,565,000 Est. Cost $13.82 Unrealized
EW EDWARDS LIFESCIENCES CORP 0.9%
Value $24.02M Shares 165,000 Est. Cost $31.99 Unrealized +45.9%
EXAS EXACT SCIENCES CORP 0.9%
Value $22.72M Shares 380,000 Est. Cost $21.44 Unrealized +151.0%
ALGN ALIGN TECHNOLOGY INC 0.9%
Value $22.58M Shares 66,000 Est. Cost $163.51 Unrealized +82.4%
INGN INOGEN INC 0.9%
Value $22.17M Shares 119,000 Est. Cost $117.20 Unrealized +42.0%
BAX BAXTER INTL INC 0.8%
Value $21.93M Shares 297,000 Est. Cost $51.31 Unrealized +19.9%
HRTX HERON THERAPEUTICS INC 0.8%
Value $20.4M Shares 525,000 Est. Cost $20.50 Unrealized +55.3%
TMO THERMO FISHER SCIENTIFIC INC 0.8%
Value $19.89M Shares 96,000 Est. Cost $165.72 Unrealized +25.5%
INCY INCYTE CORP 0.8%
Value $19.83M Shares 296,000 Est. Cost $68.02 Unrealized +0.5%
INSM INSMED INC 0.8%
Value $19.51M Shares 825,000 Est. Cost $19.73 Unrealized +30.4%
NUVASIVE INC 0.7%
Value $19.41M Shares 372,500 Est. Cost $52.19 Unrealized
FIBROGEN INC 0.7%
Value $19.22M Shares 307,000 Est. Cost $29.90 Unrealized
COR AMERISOURCEBERGEN CORP 0.7%
Value $18.76M Shares 220,000 Est. Cost $73.93 Unrealized -8.2%
ZBH ZIMMER BIOMET HLDGS INC 0.7%
Value $17.94M Shares 161,000 Est. Cost $105.20 Unrealized -2.8%
MERSANA THERAPEUTICS INC 0.7%
Value $17.86M Shares 1,000,000 Est. Cost $13.97 Unrealized
ASSEMBLY BIOSCIENCES INC 0.7%
Value $17.64M Shares 450,000 Est. Cost $17.04 Unrealized
ACRS ACLARIS THERAPEUTICS INC 0.7%
Value $17.09M Shares 856,000 Est. Cost $19.52 Unrealized -5.4%
ALNY ALNYLAM PHARMACEUTICALS INC 0.7%
Value $17.09M Shares 173,500 Est. Cost $83.88 Unrealized +18.3%
GLPG GALAPAGOS NV 0.7%
Value $17.05M Shares 185,000 Est. Cost $50.00 Unrealized
OBSEVA SA 0.7%
Value $16.96M Shares 1,120,000 Est. Cost $11.59 Unrealized
JAZZ JAZZ PHARMACEUTICALS PLC 0.6%
Value $16.89M Shares 98,000 Est. Cost $146.27 Unrealized +11.8%
EPIZYME INC 0.6%
Value $16.82M Shares 1,241,253 Est. Cost $16.49 Unrealized
AUDENTES THERAPEUTICS INC 0.6%
Value $16.81M Shares 440,000 Est. Cost $18.85 Unrealized
ARENA PHARMACEUTICALS INC 0.6%
Value $16.35M Shares 375,000 Est. Cost $31.48 Unrealized
ASND ASCENDIS PHARMA A S 0.6%
Value $16.2M Shares 243,500 Est. Cost $18.03 Unrealized
HOLX HOLOGIC INC 0.6%
Value $15.9M Shares 400,000 Est. Cost $39.97 Unrealized -3.8%
WST WEST PHARMACEUTICAL SVSC INC 0.6%
Value $15.89M Shares 160,000 Est. Cost $89.91 Unrealized 0.0%
BIOHAVEN PHARMACTL HLDG CO L 0.6%
Value $15.71M Shares 397,500 Est. Cost $27.80 Unrealized
IDXX IDEXX LABS INC 0.6%
Value $15.69M Shares 72,000 Est. Cost $187.25 Unrealized +10.0%
FOLD AMICUS THERAPEUTICS INC 0.6%
Value $15.62M Shares 1,000,000 Est. Cost $11.48 Unrealized +31.7%
BIIB BIOGEN INC 0.6%
Value $15.38M Shares 53,000 Est. Cost $273.10 Unrealized +2.9%
RARE ULTRAGENYX PHARMACEUTICAL IN 0.6%
Value $15.37M Shares 200,000 Est. Cost $61.60 Unrealized +4.9%
INTERSECT ENT INC 0.6%
Value $15.36M Shares 410,000 Est. Cost $27.86 Unrealized
TBPH THERAVANCE BIOPHARMA INC 0.6%
Value $14.8M Shares 652,600 Est. Cost $20.11 Unrealized +18.1%
G1 THERAPEUTICS INC 0.5%
Value $13.04M Shares 300,000 Est. Cost $23.31 Unrealized
EXEL EXELIXIS INC 0.5%
Value $12.8M Shares 595,000 Est. Cost $18.08 Unrealized +14.4%
TRANSLATE BIO INC 0.5%
Value $12.79M Shares 1,011,079 Est. Cost $12.65 Unrealized
BLUEPRINT MEDICINES CORP 0.5%
Value $12.63M Shares 199,000 Est. Cost $71.36 Unrealized
AMARIN CORP PLC 0.5%
Value $12.36M Shares 4,000,000 Est. Cost $3.19 Unrealized
PORTOLA PHARMACEUTICALS INC 0.5%
Value $12.23M Shares 323,800 Est. Cost $54.95 Unrealized
IMMUNOMEDICS INC 0.5%
Value $11.84M Shares 500,000 Est. Cost $15.52 Unrealized
MIRATI THERAPEUTICS INC 0.5%
Value $11.83M Shares 240,000 Est. Cost $25.31 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.5%
Value $11.78M Shares 125,000 Est. Cost $100.37 Unrealized -12.8%
CLOVIS ONCOLOGY INC 0.4%
Value $11.6M Shares 255,000 Est. Cost $55.15 Unrealized
RIGEL PHARMACEUTICALS INC 0.4%
Value $11.18M Shares 3,950,000 Est. Cost $3.22 Unrealized
RETROPHIN INC 0.4%
Value $10.9M Shares 400,000 Est. Cost $23.91 Unrealized
ARGX ARGENX SE 0.4%
Value $10.67M Shares 128,750 Est. Cost $82.86 Unrealized
ANAB ANAPTYSBIO INC 0.4%
Value $10.66M Shares 150,000 Est. Cost $32.67 Unrealized +156.8%
CLEARSIDE BIOMEDICAL INC 0.4%
Value $10.42M Shares 975,000 Est. Cost $7.16 Unrealized
INVITAE CORP 0.4%
Value $10.29M Shares 1,400,000 Est. Cost $10.13 Unrealized
A AGILENT TECHNOLOGIES INC 0.4%
Value $10.12M Shares 163,700 Est. Cost $64.18 Unrealized -3.9%
ZOGENIX INC 0.4%
Value $9.989M Shares 226,000 Est. Cost $37.83 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.4%
Value $9.66M Shares 690,000 Est. Cost $21.31 Unrealized -32.8%
HOMOLOGY MEDICINES INC 0.4%
Value $9.588M Shares 470,000 Est. Cost $18.70 Unrealized
FIVE PRIME THERAPEUTICS INC 0.4%
Value $9.375M Shares 593,000 Est. Cost $23.08 Unrealized
ARDX ARDELYX INC 0.4%
Value $9.345M Shares 2,525,557 Est. Cost $9.90 Unrealized -53.1%
ENDOCYTE INC 0.4%
Value $9.315M Shares 675,000 Est. Cost $9.09 Unrealized
MOMENTA PHARMACEUTICALS INC 0.4%
Value $9.254M Shares 452,500 Est. Cost $18.70 Unrealized
RTI SURGICAL INC 0.3%
Value $8.97M Shares 1,950,000 Est. Cost $4.35 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.3%
Value $8.903M Shares 750,000 Est. Cost $15.34 Unrealized
ODONATE THERAPEUTICS INC 0.3%
Value $8.782M Shares 397,750 Est. Cost $24.90 Unrealized
CORBF GLOBAL CORD BLOOD CORPORATIO 0.3%
Value $8.351M Shares 880,000 Est. Cost $10.11 Unrealized -6.2%
APTINYX INC 0.3%
Value $8.218M Shares 340,000 Est. Cost $24.17 Unrealized
CYMABAY THERAPEUTICS INC 0.3%
Value $7.784M Shares 580,000 Est. Cost $9.23 Unrealized
SPRO SPERO THERAPEUTICS INC 0.3%
Value $7.702M Shares 525,000 Est. Cost $12.27 Unrealized +4.2%
SAGE THERAPEUTICS INC 0.3%
Value $7.67M Shares 49,000 Est. Cost $96.49 Unrealized
RA PHARMACEUTICALS INC 0.3%
Value $7.463M Shares 750,000 Est. Cost $14.14 Unrealized
KURA KURA ONCOLOGY INC 0.3%
Value $7.28M Shares 400,000 Est. Cost $17.10 Unrealized -1.0%
BLUEBIRD BIO INC 0.3%
Value $7.063M Shares 45,000 Est. Cost $123.84 Unrealized
ZLAB ZAI LAB LTD 0.3%
Value $6.975M Shares 300,000 Est. Cost $26.94 Unrealized
AEGLEA BIOTHERAPEUTICS INC 0.3%
Value $6.877M Shares 650,000 Est. Cost $5.97 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.3%
Value $6.78M Shares 150,000 Est. Cost $34.94 Unrealized
MYOVANT SCIENCES LTD 0.3%
Value $6.749M Shares 295,100 Est. Cost $13.79 Unrealized
RYTM RHYTHM PHARMACEUTICALS INC 0.3%
Value $6.721M Shares 215,000 Est. Cost $27.03 Unrealized +1.2%
ACHILLION PHARMACEUTICALS IN 0.3%
Value $6.651M Shares 2,350,000 Est. Cost $7.27 Unrealized
LA JOLLA PHARMACEUTICAL CO 0.2%
Value $6.484M Shares 222,300 Est. Cost $29.78 Unrealized
CRVS CORVUS PHARMACEUTICALS INC 0.2%
Value $6.314M Shares 575,000 Est. Cost $13.05 Unrealized -14.5%
MGNX MACROGENICS INC 0.2%
Value $5.679M Shares 275,000 Est. Cost $30.95 Unrealized -27.2%
BSX BOSTON SCIENTIFIC CORP 0.2%
Value $5.641M Shares 172,500 Est. Cost $30.16 Unrealized 0.0%
INSMED INC 0.2%
Value $5.531M Shares 6,000,000 Est. Cost $0.89 Unrealized
DERMIRA INC 0.2%
Value $5.52M Shares 600,000 Est. Cost $17.84 Unrealized
GTX INC DEL 0.2%
Value $5.42M Shares 354,000 Est. Cost $17.75 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.2%
Value $5.207M Shares 5,000,000 Est. Cost $0.93 Unrealized
MEDICINES CO 0.2%
Value $5.052M Shares 5,000,000 Est. Cost $1.05 Unrealized
ENVISION HEALTHCARE CORP 0.2%
Value $4.854M Shares 110,300 Est. Cost $44.01 Unrealized
ADVERUM BIOTECHNOLOGIES INC 0.2%
Value $4.77M Shares 900,000 Est. Cost $5.80 Unrealized
PARATEK PHARMACEUTICALS INC 0.2%
Value $4.59M Shares 450,000 Est. Cost $15.77 Unrealized
CLEMENTIA PHARMACEUTICALS IN 0.2%
Value $4.54M Shares 345,000 Est. Cost $16.89 Unrealized
CORREVIO PHARMA CORP 0.2%
Value $4.536M Shares 1,200,000 Est. Cost $3.78 Unrealized
NOVAVAX INC 0.2%
Value $4.355M Shares 3,250,000 Est. Cost $2.53 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.2%
Value $4.087M Shares 268,000 Est. Cost $22.11 Unrealized
MEDICINES CO 0.1%
Value $3.66M Shares 3,000,000 Est. Cost $1.14 Unrealized
CGEN COMPUGEN LTD 0.1%
Value $3.558M Shares 1,078,165 Est. Cost $5.52 Unrealized -32.0%
SOLID BIOSCIENCES INC 0.1%
Value $3.385M Shares 95,000 Est. Cost $7.50 Unrealized
INTRA CELLULAR THERAPIES INC 0.1%
Value $3.313M Shares 187,500 Est. Cost $39.54 Unrealized
ALLERGAN PLC 0.1%
Value $2.945M Shares 17,665 Est. Cost $168.30 Unrealized
EGALET CORP 0.1%
Value $2.841M Shares 7,800,000 Est. Cost $0.76 Unrealized
MENLO THERAPEUTICS INC 0.1%
Value $2.68M Shares 330,000 Est. Cost $37.58 Unrealized
RESTORBIO INC 0.1%
Value $2.516M Shares 275,000 Est. Cost $9.58 Unrealized
NABRIVA THERAPEUTICS PLC 0.1%
Value $2.227M Shares 640,000 Est. Cost $9.96 Unrealized
SERES THERAPEUTICS INC 0.1%
Value $1.892M Shares 220,000 Est. Cost $38.95 Unrealized
KINIKSA PHARMACEUTICALS LTD 0.1%
Value $1.562M Shares 90,000 Est. Cost $17.36 Unrealized
CIDARA THERAPEUTICS INC 0.1%
Value $1.56M Shares 300,000 Est. Cost $13.32 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value $1.491M Shares 1,500,000 Est. Cost $1.14 Unrealized
NEUROCRINE BIOSCIENCES INC 0.1%
Value $1.446M Shares 1,000,000 Est. Cost $1.45 Unrealized
BCRX BIOCRYST PHARMACEUTICALS 0.1%
Value $1.433M Shares 250,000 Est. Cost $5.01 Unrealized +9.8%
RADIUS HEALTH INC 0.1%
Value $1.399M Shares 1,500,000 Est. Cost $1.01 Unrealized
SCYNEXIS INC 0.1%
Value $1.345M Shares 820,000 Est. Cost $6.33 Unrealized
PROTEOSTASIS THERAPEUTICS IN 0.1%
Value $1.315M Shares 471,321 Est. Cost $8.68 Unrealized
PRTA PROTHENA CORP PLC 0.0%
Value $1.239M Shares 85,000 Est. Cost $29.47 Unrealized -33.0%
PACIRA PHARMACEUTICALS INC 0.0%
Value $932K Shares 1,000,000 Est. Cost $0.91 Unrealized
DERMIRA INC 0.0%
Value $827K Shares 1,000,000 Est. Cost $0.83 Unrealized
CHIASMA INC 0.0%
Value $788K Shares 525,000 Est. Cost $18.65 Unrealized
MCK MCKESSON CORP 0.0%
Value $667K Shares 5,000 Est. Cost $137.76 Unrealized 0.0%