Rock Springs Capital Management LP Diversified Active

CIK: 0001595725 · Show all filings

Period: Q4 2018 (← Previous) (Next →)

Filing Date: Feb 14, 2019

Total Value ($000): $2,118,545 (99.0% shares, 1.0% debt)

Holdings (133)

UNH UNITEDHEALTH GROUP INC 7.1%
Value ($000) $150,244 Shares 603,100 Est. Cost $164.29 Unrealized +43.1%
WELLCARE HEALTH PLANS INC 4.3%
Value ($000) $91,957 Shares 389,500 Est. Cost $187.33 Unrealized
ISRG INTUITIVE SURGICAL INC 3.4%
Value ($000) $72,796 Shares 152,000 Est. Cost $105.96 Unrealized +59.9%
AMARIN CORP PLC 2.9%
Value ($000) $60,918 Shares 4,476,000 Est. Cost $4.49 Unrealized
GW PHARMACEUTICALS PLC 2.8%
Value ($000) $58,385 Shares 599,500 Est. Cost $101.21 Unrealized
HCA HCA HEALTHCARE INC 2.7%
Value ($000) $56,625 Shares 455,000 Est. Cost $92.21 Unrealized +36.7%
NBIX NEUROCRINE BIOSCIENCES INC 2.7%
Value ($000) $56,314 Shares 788,600 Est. Cost $51.36 Unrealized +86.5%
PCRX PACIRA PHARMACEUTICALS INC 2.5%
Value ($000) $53,775 Shares 1,250,000 Est. Cost $47.44 Unrealized -1.6%
EHC ENCOMPASS HEALTH CORP 2.1%
Value ($000) $44,733 Shares 725,000 Est. Cost $45.83 Unrealized +13.2%
TESARO INC 2.1%
Value ($000) $44,676 Shares 601,700 Est. Cost $59.89 Unrealized
MOH MOLINA HEALTHCARE INC 1.9%
Value ($000) $39,747 Shares 342,000 Est. Cost $65.41 Unrealized +100.4%
SRPT SAREPTA THERAPEUTICS INC 1.7%
Value ($000) $35,686 Shares 327,000 Est. Cost $49.05 Unrealized +155.0%
LOXO ONCOLOGY INC 1.6%
Value ($000) $33,827 Shares 241,500 Est. Cost $72.45 Unrealized
VRTX VERTEX PHARMACEUTICALS INC 1.6%
Value ($000) $33,639 Shares 203,000 Est. Cost $117.87 Unrealized +47.0%
TFX TELEFLEX INC 1.6%
Value ($000) $33,602 Shares 130,000 Est. Cost $242.14 Unrealized +0.3%
IRTC IRHYTHM TECHNOLOGIES INC 1.6%
Value ($000) $33,489 Shares 482,000 Est. Cost $48.06 Unrealized +57.7%
BSX BOSTON SCIENTIFIC CORP 1.5%
Value ($000) $32,336 Shares 915,000 Est. Cost $34.20 Unrealized +6.1%
ONC BEIGENE LTD 1.4%
Value ($000) $30,128 Shares 214,800 Est. Cost $33.43 Unrealized
EW EDWARDS LIFESCIENCES CORP 1.3%
Value ($000) $28,107 Shares 183,500 Est. Cost $33.73 Unrealized +50.0%
SYK STRYKER CORP 1.3%
Value ($000) $28,058 Shares 179,000 Est. Cost $141.99 Unrealized +9.0%
COLL COLLEGIUM PHARMACEUTICAL INC 1.3%
Value ($000) $27,560 Shares 1,605,105 Est. Cost $15.97 Unrealized +7.1%
PEN PENUMBRA INC 1.3%
Value ($000) $27,495 Shares 225,000 Est. Cost $48.06 Unrealized +178.7%
WRIGHT MED GROUP N V 1.3%
Value ($000) $27,220 Shares 1,000,000 Est. Cost $22.12 Unrealized
MDGL MADRIGAL PHARMACEUTICALS INC 1.3%
Value ($000) $27,166 Shares 241,000 Est. Cost $30.76 Unrealized +403.2%
EXAS EXACT SCIENCES CORP 1.1%
Value ($000) $24,294 Shares 385,000 Est. Cost $22.01 Unrealized +211.8%
ALEXION PHARMACEUTICALS INC 1.1%
Value ($000) $23,610 Shares 242,500 Est. Cost $138.55 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 1.1%
Value ($000) $23,158 Shares 900,750 Est. Cost $50.79 Unrealized -31.9%
ALGN ALIGN TECHNOLOGY INC 1.0%
Value ($000) $21,990 Shares 105,000 Est. Cost $198.28 Unrealized +27.4%
TMO THERMO FISHER SCIENTIFIC INC 1.0%
Value ($000) $21,484 Shares 96,000 Est. Cost $165.72 Unrealized +38.9%
ALLAKOS INC 1.0%
Value ($000) $21,117 Shares 404,000 Est. Cost $44.99 Unrealized
SPARK THERAPEUTICS INC 1.0%
Value ($000) $21,038 Shares 537,500 Est. Cost $58.20 Unrealized
IDXX IDEXX LABS INC 1.0%
Value ($000) $20,555 Shares 110,500 Est. Cost $197.36 Unrealized +3.9%
BAX BAXTER INTL INC 0.9%
Value ($000) $19,792 Shares 300,700 Est. Cost $51.40 Unrealized +14.7%
INCY INCYTE CORP 0.9%
Value ($000) $19,713 Shares 310,000 Est. Cost $68.12 Unrealized -4.7%
RARE ULTRAGENYX PHARMACEUTICAL IN 0.9%
Value ($000) $18,479 Shares 425,000 Est. Cost $57.92 Unrealized -5.6%
PRA HEALTH SCIENCES INC 0.9%
Value ($000) $18,392 Shares 200,000 Est. Cost $42.95 Unrealized
RADIUS HEALTH INC 0.9%
Value ($000) $18,139 Shares 1,100,000 Est. Cost $39.58 Unrealized
ARGX ARGENX SE 0.8%
Value ($000) $17,100 Shares 178,000 Est. Cost $82.39 Unrealized
GLPG GALAPAGOS NV 0.8%
Value ($000) $16,284 Shares 177,500 Est. Cost $50.00 Unrealized
WST WEST PHARMACEUTICAL SVSC INC 0.7%
Value ($000) $15,685 Shares 160,000 Est. Cost $89.91 Unrealized +18.2%
INVITAE CORP 0.7%
Value ($000) $15,484 Shares 1,400,000 Est. Cost $10.13 Unrealized
ASND ASCENDIS PHARMA A S 0.7%
Value ($000) $15,255 Shares 243,500 Est. Cost $18.03 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.7%
Value ($000) $15,119 Shares 1,475,000 Est. Cost $13.94 Unrealized
BIIB BIOGEN INC 0.7%
Value ($000) $15,046 Shares 50,000 Est. Cost $273.10 Unrealized +16.9%
INGN INOGEN INC 0.7%
Value ($000) $14,528 Shares 117,000 Est. Cost $123.54 Unrealized +33.3%
OBSEVA SA 0.7%
Value ($000) $14,179 Shares 1,120,000 Est. Cost $11.59 Unrealized
FIBROGEN INC 0.7%
Value ($000) $14,162 Shares 306,000 Est. Cost $29.90 Unrealized
ALNY ALNYLAM PHARMACEUTICALS INC 0.7%
Value ($000) $14,145 Shares 194,000 Est. Cost $85.83 Unrealized -10.4%
TBPH THERAVANCE BIOPHARMA INC 0.7%
Value ($000) $14,075 Shares 550,000 Est. Cost $20.11 Unrealized +34.3%
MEDICINES CO 0.7%
Value ($000) $13,913 Shares 726,900 Est. Cost $32.29 Unrealized
RA PHARMACEUTICALS INC 0.6%
Value ($000) $13,650 Shares 750,000 Est. Cost $14.14 Unrealized
HRTX HERON THERAPEUTICS INC 0.6%
Value ($000) $13,619 Shares 525,000 Est. Cost $20.50 Unrealized +34.1%
INTERSECT ENT INC 0.6%
Value ($000) $13,104 Shares 465,000 Est. Cost $27.96 Unrealized
AXGN AXOGEN INC 0.6%
Value ($000) $12,339 Shares 603,970 Est. Cost $19.50 Unrealized +60.4%
A AGILENT TECHNOLOGIES INC 0.6%
Value ($000) $12,332 Shares 182,800 Est. Cost $64.15 Unrealized -0.4%
EXEL EXELIXIS INC 0.6%
Value ($000) $12,223 Shares 621,400 Est. Cost $18.07 Unrealized -1.3%
ZBH ZIMMER BIOMET HLDGS INC 0.6%
Value ($000) $12,187 Shares 117,500 Est. Cost $107.12 Unrealized -1.0%
CELGENE CORP 0.6%
Value ($000) $11,866 Shares 185,150 Est. Cost $112.23 Unrealized
BLUEPRINT MEDICINES CORP 0.5%
Value ($000) $11,518 Shares 213,658 Est. Cost $70.25 Unrealized
SEATTLE GENETICS INC 0.5%
Value ($000) $11,474 Shares 202,500 Est. Cost $56.66 Unrealized
INSM INSMED INC 0.5%
Value ($000) $11,152 Shares 850,000 Est. Cost $19.94 Unrealized -20.0%
IMMUNOMEDICS INC 0.5%
Value ($000) $11,131 Shares 780,000 Est. Cost $17.40 Unrealized
DVA DAVITA INC 0.5%
Value ($000) $11,074 Shares 215,200 Est. Cost $71.11 Unrealized -9.9%
BMRN BIOMARIN PHARMACEUTICAL INC 0.5%
Value ($000) $10,984 Shares 129,000 Est. Cost $100.21 Unrealized -5.1%
AUDENTES THERAPEUTICS INC 0.5%
Value ($000) $10,660 Shares 500,000 Est. Cost $19.22 Unrealized
ASSEMBLY BIOSCIENCES INC 0.5%
Value ($000) $10,179 Shares 450,000 Est. Cost $18.68 Unrealized
HOMOLOGY MEDICINES INC 0.5%
Value ($000) $10,062 Shares 450,000 Est. Cost $18.70 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.5%
Value ($000) $10,057 Shares 245,000 Est. Cost $37.31 Unrealized
EPIZYME INC 0.5%
Value ($000) $9,902 Shares 1,607,500 Est. Cost $14.14 Unrealized
ACRS ACLARIS THERAPEUTICS INC 0.5%
Value ($000) $9,824 Shares 1,329,400 Est. Cost $16.36 Unrealized -37.0%
RIGEL PHARMACEUTICALS INC 0.5%
Value ($000) $9,660 Shares 4,200,000 Est. Cost $3.20 Unrealized
BIOHAVEN PHARMACTL HLDG CO L 0.5%
Value ($000) $9,615 Shares 260,000 Est. Cost $27.80 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.5%
Value ($000) $9,580 Shares 1,000,000 Est. Cost $11.48 Unrealized -4.2%
PBYI PUMA BIOTECHNOLOGY INC 0.4%
Value ($000) $9,289 Shares 456,462 Est. Cost $74.54 Unrealized -59.7%
RETROPHIN INC 0.4%
Value ($000) $9,052 Shares 400,000 Est. Cost $23.91 Unrealized
ANAB ANAPTYSBIO INC 0.4%
Value ($000) $8,675 Shares 136,000 Est. Cost $37.24 Unrealized +99.7%
ZOGENIX INC 0.4%
Value ($000) $8,568 Shares 235,000 Est. Cost $38.28 Unrealized
ZLAB ZAI LAB LTD 0.4%
Value ($000) $8,127 Shares 350,000 Est. Cost $25.87 Unrealized
GH GUARDANT HEALTH INC 0.4%
Value ($000) $8,119 Shares 216,000 Est. Cost $36.84 Unrealized 0.0%
IFRX INFLARX NV 0.4%
Value ($000) $7,925 Shares 217,900 Est. Cost $31.98 Unrealized -3.8%
TRANSLATE BIO INC 0.4%
Value ($000) $7,569 Shares 1,009,179 Est. Cost $12.65 Unrealized
FRPT FRESHPET INC 0.4%
Value ($000) $7,558 Shares 235,000 Est. Cost $34.80 Unrealized 0.0%
RTI SURGICAL INC 0.3%
Value ($000) $7,215 Shares 1,950,000 Est. Cost $4.35 Unrealized
NVCR NOVOCURE LTD 0.3%
Value ($000) $6,529 Shares 195,000 Est. Cost $36.98 Unrealized -1.1%
MIRATI THERAPEUTICS INC 0.3%
Value ($000) $6,363 Shares 150,000 Est. Cost $25.31 Unrealized
ODONATE THERAPEUTICS INC 0.3%
Value ($000) $6,266 Shares 445,000 Est. Cost $24.20 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.3%
Value ($000) $6,064 Shares 670,000 Est. Cost $21.31 Unrealized -45.7%
AXONICS MODULATION TECH INC 0.3%
Value ($000) $6,044 Shares 400,000 Est. Cost $15.11 Unrealized
NOVAVAX INC 0.3%
Value ($000) $5,980 Shares 3,250,000 Est. Cost $2.53 Unrealized
CORBF GLOBAL CORD BLOOD CORPORATIO 0.3%
Value ($000) $5,966 Shares 925,000 Est. Cost $9.99 Unrealized -36.0%
PORTOLA PHARMACEUTICALS INC 0.3%
Value ($000) $5,856 Shares 300,000 Est. Cost $54.95 Unrealized
RYTM RHYTHM PHARMACEUTICALS INC 0.3%
Value ($000) $5,820 Shares 216,500 Est. Cost $27.03 Unrealized +2.2%
MYOVANT SCIENCES LTD 0.3%
Value ($000) $5,702 Shares 347,500 Est. Cost $15.71 Unrealized
BCRX BIOCRYST PHARMACEUTICALS 0.3%
Value ($000) $5,649 Shares 700,000 Est. Cost $6.11 Unrealized +27.3%
APTINYX INC 0.2%
Value ($000) $5,045 Shares 305,000 Est. Cost $24.17 Unrealized
AEGLEA BIOTHERAPEUTICS INC 0.2%
Value ($000) $4,869 Shares 650,000 Est. Cost $5.97 Unrealized
CYMABAY THERAPEUTICS INC 0.2%
Value ($000) $4,829 Shares 613,604 Est. Cost $9.33 Unrealized
FIVE PRIME THERAPEUTICS INC 0.2%
Value ($000) $4,697 Shares 505,000 Est. Cost $23.08 Unrealized
SAGE THERAPEUTICS INC 0.2%
Value ($000) $4,694 Shares 49,000 Est. Cost $96.49 Unrealized
CLOVIS ONCOLOGY INC 0.2%
Value ($000) $4,598 Shares 256,000 Est. Cost $53.62 Unrealized
BLUEBIRD BIO INC 0.2%
Value ($000) $4,464 Shares 45,000 Est. Cost $127.00 Unrealized
MOMENTA PHARMACEUTICALS INC 0.2%
Value ($000) $4,416 Shares 400,000 Est. Cost $19.06 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.2%
Value ($000) $4,313 Shares 750,000 Est. Cost $15.34 Unrealized
INSMED INC 0.2%
Value ($000) $4,296 Shares 6,000,000 Est. Cost $0.89 Unrealized
MERSANA THERAPEUTICS INC 0.2%
Value ($000) $4,080 Shares 1,000,000 Est. Cost $13.97 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.2%
Value ($000) $4,001 Shares 5,000,000 Est. Cost $0.93 Unrealized
MEDICINES CO 0.2%
Value ($000) $3,793 Shares 5,000,000 Est. Cost $1.05 Unrealized
DERMIRA INC 0.2%
Value ($000) $3,717 Shares 517,000 Est. Cost $17.84 Unrealized
ACHILLION PHARMACEUTICALS IN 0.2%
Value ($000) $3,697 Shares 2,325,000 Est. Cost $7.19 Unrealized
ARDX ARDELYX INC 0.2%
Value ($000) $3,580 Shares 2,000,000 Est. Cost $9.90 Unrealized -70.2%
DYNAVAX TECHNOLOGIES CORP 0.2%
Value ($000) $3,477 Shares 380,000 Est. Cost $18.29 Unrealized
RESTORBIO INC 0.2%
Value ($000) $3,448 Shares 400,000 Est. Cost $11.32 Unrealized
CLEMENTIA PHARMACEUTICALS IN 0.2%
Value ($000) $3,234 Shares 275,000 Est. Cost $16.89 Unrealized
SPRO SPERO THERAPEUTICS INC 0.2%
Value ($000) $3,229 Shares 525,000 Est. Cost $12.27 Unrealized -34.0%
CORREVIO PHARMA CORP 0.1%
Value ($000) $2,988 Shares 1,200,000 Est. Cost $3.78 Unrealized
LA JOLLA PHARMACEUTICAL CO 0.1%
Value ($000) $2,614 Shares 277,236 Est. Cost $27.74 Unrealized
MEDICINES CO 0.1%
Value ($000) $2,589 Shares 3,000,000 Est. Cost $1.14 Unrealized
PHASEBIO PHARMACEUTICALS INC 0.1%
Value ($000) $2,580 Shares 835,000 Est. Cost $3.09 Unrealized
CGEN COMPUGEN LTD 0.1%
Value ($000) $2,387 Shares 1,100,000 Est. Cost $5.48 Unrealized -42.2%
NABRIVA THERAPEUTICS PLC 0.1%
Value ($000) $2,336 Shares 1,600,000 Est. Cost $5.28 Unrealized
PARATEK PHARMACEUTICALS INC 0.1%
Value ($000) $2,309 Shares 450,000 Est. Cost $15.77 Unrealized
ARVN ARVINAS INC 0.1%
Value ($000) $1,928 Shares 150,000 Est. Cost $16.46 Unrealized -3.6%
G1 THERAPEUTICS INC 0.1%
Value ($000) $1,915 Shares 100,000 Est. Cost $23.31 Unrealized
CHIASMA INC 0.1%
Value ($000) $1,633 Shares 525,000 Est. Cost $18.65 Unrealized
SOLID BIOSCIENCES INC 0.1%
Value ($000) $1,581 Shares 58,999 Est. Cost $7.50 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value ($000) $1,547 Shares 1,500,000 Est. Cost $1.14 Unrealized
CRVS CORVUS PHARMACEUTICALS INC 0.1%
Value ($000) $1,468 Shares 400,000 Est. Cost $13.05 Unrealized -47.8%
PROTEOSTASIS THERAPEUTICS IN 0.1%
Value ($000) $1,296 Shares 400,000 Est. Cost $3.24 Unrealized
NEUROCRINE BIOSCIENCES INC 0.1%
Value ($000) $1,196 Shares 1,000,000 Est. Cost $1.45 Unrealized
RADIUS HEALTH INC 0.1%
Value ($000) $1,157 Shares 1,500,000 Est. Cost $1.01 Unrealized
MGNX MACROGENICS INC 0.0%
Value ($000) $1,028 Shares 80,981 Est. Cost $30.95 Unrealized -45.8%
PACIRA PHARMACEUTICALS INC 0.0%
Value ($000) $994 Shares 1,000,000 Est. Cost $0.91 Unrealized
DERMIRA INC 0.0%
Value ($000) $775 Shares 1,000,000 Est. Cost $0.83 Unrealized