Rock Springs Capital Management LP Diversified Active

Location: Baltimore, MD

CIK: 0001595725 · Show all filings

Period: Q3 2018 (← Previous) (Next →)

Filing Date: Nov 14, 2018

Total Value: $2.762B (99.1% shares, 0.9% debt)

Holdings (144)

UNH UNITEDHEALTH GROUP INC 5.7%
Value $157M Shares 589,098 Est. Cost $162.61 Unrealized +41.8%
ISRG INTUITIVE SURGICAL INC 2.9%
Value $81.16M Shares 141,400 Est. Cost $101.20 Unrealized +75.5%
MOH MOLINA HEALTHCARE INC 2.9%
Value $81.04M Shares 545,000 Est. Cost $65.41 Unrealized +95.2%
NBIX NEUROCRINE BIOSCIENCES INC 2.9%
Value $79.3M Shares 645,000 Est. Cost $41.47 Unrealized +173.6%
WELLCARE HEALTH PLANS INC 2.7%
Value $75.47M Shares 235,500 Est. Cost $155.44 Unrealized
MDGL MADRIGAL PHARMACEUTICALS INC 2.7%
Value $73.23M Shares 342,000 Est. Cost $30.76 Unrealized +715.9%
AMARIN CORP PLC 2.5%
Value $70.37M Shares 4,325,000 Est. Cost $4.17 Unrealized
GW PHARMACEUTICALS PLC 2.5%
Value $69.1M Shares 400,000 Est. Cost $103.12 Unrealized
PCRX PACIRA PHARMACEUTICALS INC 2.3%
Value $63.52M Shares 1,292,479 Est. Cost $47.44 Unrealized -8.9%
HCA HCA HEALTHCARE INC 2.3%
Value $63.3M Shares 455,000 Est. Cost $92.21 Unrealized +26.5%
EHC ENCOMPASS HEALTH CORP 1.9%
Value $52.73M Shares 676,500 Est. Cost $45.40 Unrealized +21.7%
SRPT SAREPTA THERAPEUTICS INC 1.8%
Value $50.15M Shares 310,500 Est. Cost $45.01 Unrealized +203.7%
IRTC IRHYTHM TECHNOLOGIES INC 1.6%
Value $45.44M Shares 480,000 Est. Cost $48.06 Unrealized +81.2%
ALEXION PHARMACEUTICALS INC 1.5%
Value $41.7M Shares 300,000 Est. Cost $138.55 Unrealized
VRTX VERTEX PHARMACEUTICALS INC 1.4%
Value $37.78M Shares 196,000 Est. Cost $115.90 Unrealized +53.6%
ONC BEIGENE LTD 1.3%
Value $37.03M Shares 215,000 Est. Cost $33.43 Unrealized
PEN PENUMBRA INC 1.3%
Value $35.21M Shares 235,200 Est. Cost $48.06 Unrealized +191.5%
LOXO ONCOLOGY INC 1.3%
Value $34.67M Shares 202,981 Est. Cost $59.62 Unrealized
TFX TELEFLEX INC 1.2%
Value $32.99M Shares 124,000 Est. Cost $242.11 Unrealized +2.7%
CELGENE CORP 1.2%
Value $32.25M Shares 360,400 Est. Cost $112.23 Unrealized
SYK STRYKER CORP 1.2%
Value $31.8M Shares 179,000 Est. Cost $141.99 Unrealized +11.0%
PRA HEALTH SCIENCES INC 1.1%
Value $31.76M Shares 288,247 Est. Cost $42.95 Unrealized
EW EDWARDS LIFESCIENCES CORP 1.1%
Value $31.34M Shares 180,000 Est. Cost $33.40 Unrealized +46.4%
BSX BOSTON SCIENTIFIC CORP 1.1%
Value $30.8M Shares 800,000 Est. Cost $33.90 Unrealized +3.0%
INGN INOGEN INC 1.1%
Value $30.76M Shares 126,000 Est. Cost $123.54 Unrealized +87.2%
ABBV ABBVIE INC 1.1%
Value $30.74M Shares 325,000 Est. Cost $78.53 Unrealized -11.9%
EXAS EXACT SCIENCES CORP 1.1%
Value $30.38M Shares 385,000 Est. Cost $22.01 Unrealized +196.3%
ZBH ZIMMER BIOMET HLDGS INC 1.1%
Value $29.58M Shares 225,000 Est. Cost $107.12 Unrealized +4.5%
SPARK THERAPEUTICS INC 1.1%
Value $29.32M Shares 537,500 Est. Cost $58.20 Unrealized
DVA DAVITA INC 1.1%
Value $29.26M Shares 408,500 Est. Cost $71.11 Unrealized -0.6%
WRIGHT MED GROUP N V 1.1%
Value $29.02M Shares 1,000,000 Est. Cost $22.12 Unrealized
TESARO INC 1.0%
Value $28.67M Shares 735,000 Est. Cost $59.89 Unrealized
ALDER BIOPHARMACEUTICALS INC 1.0%
Value $27.18M Shares 1,632,500 Est. Cost $13.94 Unrealized
ALGN ALIGN TECHNOLOGY INC 1.0%
Value $26.41M Shares 67,500 Est. Cost $168.07 Unrealized +119.5%
ACHC ACADIA HEALTHCARE COMPANY IN 0.9%
Value $24.64M Shares 700,000 Est. Cost $55.43 Unrealized -28.1%
INCY INCYTE CORP 0.9%
Value $24.32M Shares 352,100 Est. Cost $68.12 Unrealized +0.8%
COLL COLLEGIUM PHARMACEUTICAL INC 0.9%
Value $24.32M Shares 1,650,100 Est. Cost $15.97 Unrealized +11.0%
TMO THERMO FISHER SCIENTIFIC INC 0.8%
Value $23.43M Shares 96,000 Est. Cost $165.72 Unrealized +36.2%
INVITAE CORP 0.8%
Value $23.42M Shares 1,400,000 Est. Cost $10.13 Unrealized
BAX BAXTER INTL INC 0.8%
Value $22.9M Shares 297,000 Est. Cost $51.31 Unrealized +26.5%
RADIUS HEALTH INC 0.8%
Value $22.56M Shares 1,267,500 Est. Cost $39.58 Unrealized
PBYI PUMA BIOTECHNOLOGY INC 0.8%
Value $22.36M Shares 487,600 Est. Cost $74.54 Unrealized -35.3%
IDXX IDEXX LABS INC 0.8%
Value $20.85M Shares 83,500 Est. Cost $194.89 Unrealized +24.6%
MEDICINES CO 0.7%
Value $20.64M Shares 690,000 Est. Cost $33.00 Unrealized
OBSEVA SA 0.7%
Value $20.19M Shares 1,120,000 Est. Cost $11.59 Unrealized
AXGN AXOGEN INC 0.7%
Value $20.03M Shares 543,474 Est. Cost $18.19 Unrealized +140.0%
GLPG GALAPAGOS NV 0.7%
Value $19.96M Shares 177,500 Est. Cost $50.00 Unrealized
WST WEST PHARMACEUTICAL SVSC INC 0.7%
Value $19.75M Shares 160,000 Est. Cost $89.91 Unrealized +22.0%
FIBROGEN INC 0.7%
Value $18.59M Shares 306,000 Est. Cost $29.90 Unrealized
ALLAKOS INC 0.7%
Value $18.22M Shares 405,000 Est. Cost $44.99 Unrealized
ASSEMBLY BIOSCIENCES INC 0.7%
Value $18.2M Shares 490,000 Est. Cost $18.68 Unrealized
INSM INSMED INC 0.7%
Value $18M Shares 890,000 Est. Cost $19.94 Unrealized +13.4%
TBPH THERAVANCE BIOPHARMA INC 0.7%
Value $17.97M Shares 550,000 Est. Cost $20.11 Unrealized +35.5%
BIIB BIOGEN INC 0.6%
Value $17.67M Shares 50,000 Est. Cost $273.10 Unrealized +26.1%
ARENA PHARMACEUTICALS INC 0.6%
Value $17.26M Shares 375,000 Est. Cost $31.48 Unrealized
ASND ASCENDIS PHARMA A S 0.6%
Value $17.25M Shares 243,500 Est. Cost $18.03 Unrealized
ALNY ALNYLAM PHARMACEUTICALS INC 0.6%
Value $17.2M Shares 196,500 Est. Cost $85.83 Unrealized +17.2%
AUDENTES THERAPEUTICS INC 0.6%
Value $16.83M Shares 425,025 Est. Cost $18.85 Unrealized
HRTX HERON THERAPEUTICS INC 0.6%
Value $16.62M Shares 525,000 Est. Cost $20.50 Unrealized +81.7%
ANAB ANAPTYSBIO INC 0.6%
Value $16.46M Shares 165,000 Est. Cost $37.24 Unrealized +122.8%
IMMUNOMEDICS INC 0.6%
Value $16.14M Shares 775,000 Est. Cost $17.40 Unrealized
BLUEPRINT MEDICINES CORP 0.6%
Value $15.61M Shares 200,000 Est. Cost $71.36 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.6%
Value $15.27M Shares 200,000 Est. Cost $61.60 Unrealized +32.1%
ENDOCYTE INC 0.5%
Value $15.1M Shares 850,000 Est. Cost $10.88 Unrealized
RA PHARMACEUTICALS INC 0.5%
Value $13.57M Shares 750,000 Est. Cost $14.14 Unrealized
RIGEL PHARMACEUTICALS INC 0.5%
Value $13.24M Shares 4,125,000 Est. Cost $3.22 Unrealized
INTERSECT ENT INC 0.5%
Value $13.22M Shares 460,000 Est. Cost $27.95 Unrealized
EPIZYME INC 0.5%
Value $13.16M Shares 1,241,253 Est. Cost $16.49 Unrealized
ELAN ELANCO ANIMAL HEALTH INC 0.5%
Value $13.08M Shares 375,000 Est. Cost $35.17 Unrealized 0.0%
ACRS ACLARIS THERAPEUTICS INC 0.5%
Value $12.78M Shares 880,000 Est. Cost $19.46 Unrealized -11.9%
ARGX ARGENX SE 0.5%
Value $12.51M Shares 165,000 Est. Cost $81.32 Unrealized
MOMENTA PHARMACEUTICALS INC 0.5%
Value $12.49M Shares 475,000 Est. Cost $19.06 Unrealized
G1 THERAPEUTICS INC 0.4%
Value $12.19M Shares 233,073 Est. Cost $23.31 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.4%
Value $12.12M Shares 125,000 Est. Cost $100.37 Unrealized -0.5%
FOLD AMICUS THERAPEUTICS INC 0.4%
Value $12.09M Shares 1,000,000 Est. Cost $11.48 Unrealized +21.8%
ZOGENIX INC 0.4%
Value $11.66M Shares 235,000 Est. Cost $38.28 Unrealized
A AGILENT TECHNOLOGIES INC 0.4%
Value $11.58M Shares 164,100 Est. Cost $64.18 Unrealized -2.3%
RETROPHIN INC 0.4%
Value $11.49M Shares 400,000 Est. Cost $23.91 Unrealized
MIRATI THERAPEUTICS INC 0.4%
Value $11.3M Shares 240,000 Est. Cost $25.31 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.4%
Value $11.05M Shares 670,000 Est. Cost $21.31 Unrealized -16.8%
ARDX ARDELYX INC 0.4%
Value $10.99M Shares 2,525,557 Est. Cost $9.90 Unrealized -57.9%
HOMOLOGY MEDICINES INC 0.4%
Value $10.74M Shares 470,000 Est. Cost $18.70 Unrealized
EXEL EXELIXIS INC 0.4%
Value $10.54M Shares 595,000 Est. Cost $18.08 Unrealized +7.8%
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.4%
Value $10.17M Shares 750,000 Est. Cost $15.34 Unrealized
TRANSLATE BIO INC 0.4%
Value $10.09M Shares 1,009,179 Est. Cost $12.65 Unrealized
MERSANA THERAPEUTICS INC 0.4%
Value $10M Shares 1,000,000 Est. Cost $13.97 Unrealized
BIOHAVEN PHARMACTL HLDG CO L 0.4%
Value $9.763M Shares 260,000 Est. Cost $27.80 Unrealized
MYOVANT SCIENCES LTD 0.3%
Value $9.226M Shares 347,500 Est. Cost $15.71 Unrealized
APTINYX INC 0.3%
Value $8.833M Shares 305,000 Est. Cost $24.17 Unrealized
ACHILLION PHARMACEUTICALS IN 0.3%
Value $8.832M Shares 2,400,000 Est. Cost $7.19 Unrealized
RTI SURGICAL INC 0.3%
Value $8.775M Shares 1,950,000 Est. Cost $4.35 Unrealized
PORTOLA PHARMACEUTICALS INC 0.3%
Value $8.623M Shares 323,800 Est. Cost $54.95 Unrealized
ODONATE THERAPEUTICS INC 0.3%
Value $8.453M Shares 435,500 Est. Cost $24.42 Unrealized
FIVE PRIME THERAPEUTICS INC 0.3%
Value $8.324M Shares 598,000 Est. Cost $23.08 Unrealized
CLOVIS ONCOLOGY INC 0.3%
Value $7.962M Shares 271,100 Est. Cost $53.62 Unrealized
ENTA ENANTA PHARMACEUTICALS INC 0.3%
Value $7.905M Shares 92,500 Est. Cost $100.17 Unrealized 0.0%
BLUEBIRD BIO INC 0.3%
Value $7.665M Shares 52,500 Est. Cost $127.00 Unrealized
KURA KURA ONCOLOGY INC 0.3%
Value $7.088M Shares 405,000 Est. Cost $17.13 Unrealized +11.9%
SAGE THERAPEUTICS INC 0.3%
Value $6.921M Shares 49,000 Est. Cost $96.49 Unrealized
ZLAB ZAI LAB LTD 0.2%
Value $6.818M Shares 350,000 Est. Cost $25.87 Unrealized
CYMABAY THERAPEUTICS INC 0.2%
Value $6.799M Shares 613,604 Est. Cost $9.33 Unrealized
DERMIRA INC 0.2%
Value $6.54M Shares 600,000 Est. Cost $17.84 Unrealized
CORBF GLOBAL CORD BLOOD CORPORATIO 0.2%
Value $6.466M Shares 925,000 Est. Cost $9.99 Unrealized -25.0%
RYTM RHYTHM PHARMACEUTICALS INC 0.2%
Value $6.272M Shares 215,000 Est. Cost $27.03 Unrealized +16.9%
AEGLEA BIOTHERAPEUTICS INC 0.2%
Value $6.221M Shares 650,000 Est. Cost $5.97 Unrealized
NOVAVAX INC 0.2%
Value $6.11M Shares 3,250,000 Est. Cost $2.53 Unrealized
IFRX INFLARX NV 0.2%
Value $6.092M Shares 177,500 Est. Cost $32.25 Unrealized 0.0%
RESTORBIO INC 0.2%
Value $6.056M Shares 400,000 Est. Cost $11.32 Unrealized
CLEARSIDE BIOMEDICAL INC 0.2%
Value $5.996M Shares 975,000 Est. Cost $7.16 Unrealized
MGNX MACROGENICS INC 0.2%
Value $5.896M Shares 275,000 Est. Cost $30.95 Unrealized -31.1%
GLOBAL BLOOD THERAPEUTICS IN 0.2%
Value $5.7M Shares 150,000 Est. Cost $34.94 Unrealized
LA JOLLA PHARMACEUTICAL CO 0.2%
Value $5.673M Shares 281,800 Est. Cost $27.74 Unrealized
SPRO SPERO THERAPEUTICS INC 0.2%
Value $5.518M Shares 525,000 Est. Cost $12.27 Unrealized -5.4%
ADVERUM BIOTECHNOLOGIES INC 0.2%
Value $5.445M Shares 900,000 Est. Cost $5.80 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.2%
Value $5.362M Shares 5,000,000 Est. Cost $0.93 Unrealized
BCRX BIOCRYST PHARMACEUTICALS 0.2%
Value $5.341M Shares 700,000 Est. Cost $6.11 Unrealized +10.0%
INSMED INC 0.2%
Value $5.073M Shares 6,000,000 Est. Cost $0.89 Unrealized
CRVS CORVUS PHARMACEUTICALS INC 0.2%
Value $4.934M Shares 575,000 Est. Cost $13.05 Unrealized -23.4%
NABRIVA THERAPEUTICS PLC 0.2%
Value $4.86M Shares 1,800,000 Est. Cost $5.28 Unrealized
CORREVIO PHARMA CORP 0.2%
Value $4.824M Shares 1,200,000 Est. Cost $3.78 Unrealized
MEDICINES CO 0.2%
Value $4.56M Shares 5,000,000 Est. Cost $1.05 Unrealized
SOLID BIOSCIENCES INC 0.2%
Value $4.482M Shares 95,000 Est. Cost $7.50 Unrealized
PARATEK PHARMACEUTICALS INC 0.2%
Value $4.365M Shares 450,000 Est. Cost $15.77 Unrealized
CGEN COMPUGEN LTD 0.2%
Value $4.151M Shares 1,078,165 Est. Cost $5.52 Unrealized -36.7%
INTRA CELLULAR THERAPIES INC 0.1%
Value $4.069M Shares 187,500 Est. Cost $39.54 Unrealized
CLEMENTIA PHARMACEUTICALS IN 0.1%
Value $3.847M Shares 345,000 Est. Cost $16.89 Unrealized
VKTX VIKING THERAPEUTICS INC 0.1%
Value $3.484M Shares 200,000 Est. Cost $11.90 Unrealized 0.0%
ALLERGAN PLC 0.1%
Value $3.365M Shares 17,665 Est. Cost $168.30 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.1%
Value $3.323M Shares 268,000 Est. Cost $22.11 Unrealized
MENLO THERAPEUTICS INC 0.1%
Value $3.251M Shares 330,000 Est. Cost $37.58 Unrealized
MEDICINES CO 0.1%
Value $3.231M Shares 3,000,000 Est. Cost $1.14 Unrealized
ARVN ARVINAS INC 0.1%
Value $2.531M Shares 150,000 Est. Cost $16.46 Unrealized 0.0%
CHIASMA INC 0.1%
Value $1.89M Shares 525,000 Est. Cost $18.65 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value $1.77M Shares 1,500,000 Est. Cost $1.14 Unrealized
NEUROCRINE BIOSCIENCES INC 0.1%
Value $1.707M Shares 1,000,000 Est. Cost $1.45 Unrealized
SERES THERAPEUTICS INC 0.1%
Value $1.67M Shares 220,000 Est. Cost $38.95 Unrealized
CIDARA THERAPEUTICS INC 0.0%
Value $1.32M Shares 300,000 Est. Cost $13.32 Unrealized
NVCR NOVOCURE LTD 0.0%
Value $1.31M Shares 25,000 Est. Cost $39.80 Unrealized 0.0%
UROV UROVANT SCIENCES LTD 0.0%
Value $1.2M Shares 100,000 Est. Cost $12.00 Unrealized
RADIUS HEALTH INC 0.0%
Value $1.153M Shares 1,500,000 Est. Cost $1.01 Unrealized
PACIRA PHARMACEUTICALS INC 0.0%
Value $1.06M Shares 1,000,000 Est. Cost $0.91 Unrealized
SCYNEXIS INC 0.0%
Value $984K Shares 820,000 Est. Cost $6.33 Unrealized
DERMIRA INC 0.0%
Value $834K Shares 1,000,000 Est. Cost $0.83 Unrealized
GTX INC DEL 0.0%
Value $79,000 Shares 50,000 Est. Cost $17.75 Unrealized