Rock Springs Capital Management LP Diversified Active

CIK: 0001595725 · Show all filings

Period: Q4 2017 (← Previous) (Next →)

Filing Date: Feb 14, 2018

Total Value ($000): $2,203,927 (99.3% shares, 0.7% debt)

Holdings (145)

UNH UNITEDHEALTH GROUP INC 4.9%
Value ($000) $107,364 Shares 487,000 Est. Cost $151.47 Unrealized +22.8%
ADVANCED ACCELERATOR APPLIC 3.1%
Value ($000) $67,377 Shares 825,500 Est. Cost $33.80 Unrealized
CIGNA CORPORATION 3.0%
Value ($000) $65,192 Shares 321,000 Est. Cost $131.82 Unrealized
ALEXION PHARMACEUTICALS INC 2.6%
Value ($000) $57,403 Shares 480,000 Est. Cost $139.06 Unrealized
ISRG INTUITIVE SURGICAL INC 2.4%
Value ($000) $52,515 Shares 143,900 Est. Cost $101.20 Unrealized +23.7%
PCRX PACIRA PHARMACEUTICALS INC 2.3%
Value ($000) $50,521 Shares 1,106,700 Est. Cost $48.85 Unrealized -18.9%
MRK MERCK & CO INC 2.2%
Value ($000) $47,869 Shares 850,700 Est. Cost $43.75 Unrealized -1.7%
GW PHARMACEUTICALS PLC 2.1%
Value ($000) $46,732 Shares 354,000 Est. Cost $94.73 Unrealized
TESARO INC 2.1%
Value ($000) $45,454 Shares 548,500 Est. Cost $65.66 Unrealized
PRA HEALTH SCIENCES INC 2.0%
Value ($000) $43,486 Shares 477,500 Est. Cost $42.95 Unrealized
MOH MOLINA HEALTHCARE INC 2.0%
Value ($000) $43,478 Shares 567,000 Est. Cost $65.17 Unrealized +10.8%
AETNA INC NEW 2.0%
Value ($000) $43,113 Shares 239,000 Est. Cost $124.56 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 1.9%
Value ($000) $40,902 Shares 1,253,500 Est. Cost $55.43 Unrealized -37.5%
NBIX NEUROCRINE BIOSCIENCES INC 1.7%
Value ($000) $37,709 Shares 486,000 Est. Cost $26.29 Unrealized +159.5%
PBYI PUMA BIOTECHNOLOGY INC 1.7%
Value ($000) $36,920 Shares 373,500 Est. Cost $78.12 Unrealized +43.2%
COLL COLLEGIUM PHARMACEUTICAL INC 1.6%
Value ($000) $34,811 Shares 1,885,729 Est. Cost $15.83 Unrealized -9.5%
SPARK THERAPEUTICS INC 1.4%
Value ($000) $31,623 Shares 615,000 Est. Cost $58.09 Unrealized
CELGENE CORP 1.4%
Value ($000) $31,621 Shares 303,000 Est. Cost $118.21 Unrealized
MDGL MADRIGAL PHARMACEUTICALS INC 1.4%
Value ($000) $31,392 Shares 342,000 Est. Cost $23.28 Unrealized +145.3%
RADIUS HEALTH INC 1.4%
Value ($000) $29,959 Shares 943,000 Est. Cost $44.43 Unrealized
PEN PENUMBRA INC 1.3%
Value ($000) $29,218 Shares 310,500 Est. Cost $48.06 Unrealized +106.4%
JNJ JOHNSON & JOHNSON 1.3%
Value ($000) $27,944 Shares 200,000 Est. Cost $95.59 Unrealized +16.1%
WELLCARE HEALTH PLANS INC 1.2%
Value ($000) $26,949 Shares 134,000 Est. Cost $79.73 Unrealized
LOXO ONCOLOGY INC 1.2%
Value ($000) $26,096 Shares 310,000 Est. Cost $58.45 Unrealized
ONC BEIGENE LTD 1.2%
Value ($000) $25,994 Shares 266,000 Est. Cost $33.43 Unrealized
VRTX VERTEX PHARMACEUTICALS INC 1.2%
Value ($000) $25,664 Shares 171,250 Est. Cost $109.03 Unrealized +35.8%
EXAS EXACT SCIENCES CORP 1.0%
Value ($000) $22,850 Shares 434,900 Est. Cost $20.61 Unrealized +159.1%
TFX TELEFLEX INC 1.0%
Value ($000) $22,829 Shares 91,750 Est. Cost $239.92 Unrealized 0.0%
IRTC IRHYTHM TECHNOLOGIES INC 1.0%
Value ($000) $22,756 Shares 406,000 Est. Cost $45.62 Unrealized +14.6%
GILD GILEAD SCIENCES INC 1.0%
Value ($000) $22,452 Shares 313,400 Est. Cost $54.83 Unrealized +2.0%
MERSANA THERAPEUTICS INC 1.0%
Value ($000) $21,799 Shares 1,326,800 Est. Cost $13.97 Unrealized
EW EDWARDS LIFESCIENCES CORP 1.0%
Value ($000) $21,415 Shares 190,001 Est. Cost $31.99 Unrealized +14.7%
TMO THERMO FISHER SCIENTIFIC INC 0.9%
Value ($000) $20,887 Shares 110,000 Est. Cost $164.09 Unrealized +14.2%
ASSEMBLY BIOSCIENCES INC 0.9%
Value ($000) $20,363 Shares 450,000 Est. Cost $16.69 Unrealized
SYK STRYKER CORP 0.9%
Value ($000) $19,587 Shares 126,500 Est. Cost $139.59 Unrealized 0.0%
AVEXIS INC 0.9%
Value ($000) $19,367 Shares 175,000 Est. Cost $38.23 Unrealized
INSM INSMED INC 0.9%
Value ($000) $19,129 Shares 613,500 Est. Cost $17.46 Unrealized +69.2%
MEDICINES CO 0.9%
Value ($000) $18,865 Shares 690,000 Est. Cost $33.00 Unrealized
WTW WILLIS TOWERS WATSON PUB LTD 0.8%
Value ($000) $18,535 Shares 123,000 Est. Cost $112.37 Unrealized +25.5%
TBPH THERAVANCE BIOPHARMA INC 0.8%
Value ($000) $18,201 Shares 652,600 Est. Cost $20.11 Unrealized +47.2%
GLPG GALAPAGOS NV 0.8%
Value ($000) $17,346 Shares 185,000 Est. Cost $50.00 Unrealized
INCY INCYTE CORP 0.8%
Value ($000) $17,285 Shares 182,500 Est. Cost $67.79 Unrealized +54.2%
BIIB BIOGEN INC 0.8%
Value ($000) $16,884 Shares 53,000 Est. Cost $273.10 Unrealized +17.5%
JAZZ JAZZ PHARMACEUTICALS PLC 0.8%
Value ($000) $16,656 Shares 123,700 Est. Cost $146.27 Unrealized -5.2%
EPIZYME INC 0.8%
Value ($000) $16,629 Shares 1,325,000 Est. Cost $16.49 Unrealized
ALNY ALNYLAM PHARMACEUTICALS INC 0.7%
Value ($000) $16,517 Shares 130,000 Est. Cost $75.78 Unrealized +65.8%
AUDENTES THERAPEUTICS INC 0.7%
Value ($000) $16,406 Shares 525,000 Est. Cost $18.00 Unrealized
AMARIN CORP PLC 0.7%
Value ($000) $15,840 Shares 3,950,000 Est. Cost $3.19 Unrealized
PORTOLA PHARMACEUTICALS INC 0.7%
Value ($000) $15,763 Shares 323,800 Est. Cost $54.95 Unrealized
CLOVIS ONCOLOGY INC 0.7%
Value ($000) $15,742 Shares 231,500 Est. Cost $56.13 Unrealized
WRIGHT MED GROUP N V 0.7%
Value ($000) $15,540 Shares 700,000 Est. Cost $23.10 Unrealized
FIBROGEN INC 0.7%
Value ($000) $15,405 Shares 325,000 Est. Cost $29.90 Unrealized
ARDX ARDELYX INC 0.7%
Value ($000) $15,019 Shares 2,275,557 Est. Cost $10.47 Unrealized -43.4%
BAX BAXTER INTL INC 0.7%
Value ($000) $14,867 Shares 230,000 Est. Cost $49.09 Unrealized +13.6%
ALGN ALIGN TECHNOLOGY INC 0.7%
Value ($000) $14,831 Shares 66,750 Est. Cost $163.51 Unrealized +38.9%
ZBH ZIMMER BIOMET HLDGS INC 0.7%
Value ($000) $14,360 Shares 119,000 Est. Cost $104.66 Unrealized +1.1%
SRPT SAREPTA THERAPEUTICS INC 0.7%
Value ($000) $14,355 Shares 258,000 Est. Cost $32.85 Unrealized +61.3%
ANAB ANAPTYSBIO INC 0.7%
Value ($000) $14,343 Shares 142,400 Est. Cost $26.97 Unrealized +172.9%
HOLX HOLOGIC INC 0.6%
Value ($000) $14,321 Shares 335,000 Est. Cost $39.89 Unrealized 0.0%
AXGN AXOGEN INC 0.6%
Value ($000) $13,513 Shares 477,500 Est. Cost $15.30 Unrealized +54.2%
FOLD AMICUS THERAPEUTICS INC 0.6%
Value ($000) $13,095 Shares 910,000 Est. Cost $11.11 Unrealized +23.7%
HEALTHSOUTH CORP 0.6%
Value ($000) $13,094 Shares 265,000 Est. Cost $41.93 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.5%
Value ($000) $12,080 Shares 1,055,000 Est. Cost $14.26 Unrealized
INVITAE CORP 0.5%
Value ($000) $11,858 Shares 1,306,000 Est. Cost $10.53 Unrealized
DERMIRA INC 0.5%
Value ($000) $11,680 Shares 420,000 Est. Cost $22.07 Unrealized
PRTA PROTHENA CORP PLC 0.5%
Value ($000) $11,622 Shares 310,000 Est. Cost $29.28 Unrealized +73.9%
ASND ASCENDIS PHARMA A S 0.5%
Value ($000) $11,217 Shares 280,000 Est. Cost $17.44 Unrealized
INTERSECT ENT INC 0.5%
Value ($000) $11,178 Shares 345,000 Est. Cost $25.70 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.5%
Value ($000) $11,146 Shares 125,000 Est. Cost $100.37 Unrealized -13.4%
AIMMUNE THERAPEUTICS INC 0.5%
Value ($000) $11,081 Shares 293,000 Est. Cost $22.58 Unrealized
BLUEPRINT MEDICINES CORP 0.5%
Value ($000) $11,048 Shares 146,500 Est. Cost $72.02 Unrealized
JUNO THERAPEUTICS INC 0.5%
Value ($000) $10,513 Shares 230,000 Est. Cost $49.72 Unrealized
ODONATE THERAPEUTICS INC 0.5%
Value ($000) $10,250 Shares 410,000 Est. Cost $25.00 Unrealized
ACRS ACLARIS THERAPEUTICS INC 0.5%
Value ($000) $10,234 Shares 415,000 Est. Cost $19.88 Unrealized +22.5%
RIGEL PHARMACEUTICALS INC 0.4%
Value ($000) $9,603 Shares 2,475,000 Est. Cost $3.42 Unrealized
INGN INOGEN INC 0.4%
Value ($000) $9,526 Shares 80,000 Est. Cost $110.11 Unrealized 0.0%
FIVE PRIME THERAPEUTICS INC 0.4%
Value ($000) $9,316 Shares 425,000 Est. Cost $25.44 Unrealized
HQY HEALTHEQUITY INC 0.4%
Value ($000) $9,099 Shares 195,000 Est. Cost $44.98 Unrealized +10.1%
ZOGENIX INC 0.4%
Value ($000) $9,031 Shares 225,500 Est. Cost $37.83 Unrealized
CHINA CORD BLOOD CORP 0.4%
Value ($000) $8,756 Shares 880,000 Est. Cost $4.24 Unrealized
RETROPHIN INC 0.4%
Value ($000) $8,428 Shares 400,000 Est. Cost $23.91 Unrealized
OBSEVA SA 0.4%
Value ($000) $8,198 Shares 840,000 Est. Cost $10.41 Unrealized
ALMOST FAMILY INC 0.4%
Value ($000) $8,166 Shares 147,540 Est. Cost $53.54 Unrealized
PARATEK PHARMACEUTICALS INC 0.4%
Value ($000) $8,055 Shares 450,000 Est. Cost $15.77 Unrealized
BLUEBIRD BIO INC 0.4%
Value ($000) $8,015 Shares 45,000 Est. Cost $123.84 Unrealized
RTI SURGICAL INC 0.4%
Value ($000) $7,995 Shares 1,950,000 Est. Cost $4.35 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.3%
Value ($000) $7,560 Shares 163,000 Est. Cost $61.79 Unrealized -20.6%
SAGE THERAPEUTICS INC 0.3%
Value ($000) $7,412 Shares 45,000 Est. Cost $90.75 Unrealized
ARENA PHARMACEUTICALS INC 0.3%
Value ($000) $7,304 Shares 215,000 Est. Cost $25.50 Unrealized
THERAPEUTICSMD INC 0.3%
Value ($000) $7,097 Shares 1,175,000 Est. Cost $7.12 Unrealized
SEATTLE GENETICS INC 0.3%
Value ($000) $6,688 Shares 125,000 Est. Cost $52.27 Unrealized
BIOHAVEN PHARMACTL HLDG CO L 0.3%
Value ($000) $6,583 Shares 244,000 Est. Cost $25.00 Unrealized
CLEMENTIA PHARMACEUTICALS IN 0.3%
Value ($000) $6,548 Shares 345,000 Est. Cost $16.89 Unrealized
CLEARSIDE BIOMEDICAL INC 0.3%
Value ($000) $6,545 Shares 935,000 Est. Cost $7.01 Unrealized
ACHILLION PHARMACEUTICALS IN 0.3%
Value ($000) $6,480 Shares 2,250,000 Est. Cost $7.47 Unrealized
1741046D STERIS PLC 0.3%
Value ($000) $6,473 Shares 74,000 Est. Cost $69.98 Unrealized
ZLAB ZAI LAB LTD 0.3%
Value ($000) $6,263 Shares 295,000 Est. Cost $27.00 Unrealized
ABLYNX NV 0.3%
Value ($000) $6,248 Shares 250,000 Est. Cost $24.99 Unrealized
SPRO SPERO THERAPEUTICS INC 0.3%
Value ($000) $6,169 Shares 525,000 Est. Cost $12.27 Unrealized 0.0%
TETRAPHASE PHARMACEUTICALS I 0.3%
Value ($000) $5,985 Shares 950,000 Est. Cost $6.12 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.3%
Value ($000) $5,903 Shares 150,000 Est. Cost $34.94 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.3%
Value ($000) $5,845 Shares 875,000 Est. Cost $15.34 Unrealized
DVA DAVITA INC 0.3%
Value ($000) $5,787 Shares 80,100 Est. Cost $61.54 Unrealized 0.0%
CHRS COHERUS BIOSCIENCES INC 0.3%
Value ($000) $5,540 Shares 629,500 Est. Cost $22.39 Unrealized -52.2%
EXEL EXELIXIS INC 0.2%
Value ($000) $5,320 Shares 175,000 Est. Cost $11.85 Unrealized +124.6%
MERUS N V 0.2%
Value ($000) $5,276 Shares 271,952 Est. Cost $9.33 Unrealized
RA PHARMACEUTICALS INC 0.2%
Value ($000) $5,100 Shares 600,000 Est. Cost $15.19 Unrealized
MEDICINES CO 0.2%
Value ($000) $4,597 Shares 5,000,000 Est. Cost $1.05 Unrealized
HRTX HERON THERAPEUTICS INC 0.2%
Value ($000) $4,525 Shares 250,000 Est. Cost $16.31 Unrealized 0.0%
CRVS CORVUS PHARMACEUTICALS INC 0.2%
Value ($000) $4,378 Shares 422,600 Est. Cost $14.35 Unrealized -10.8%
MGNX MACROGENICS INC 0.2%
Value ($000) $4,275 Shares 225,000 Est. Cost $32.43 Unrealized -42.4%
G1 THERAPEUTICS INC 0.2%
Value ($000) $4,256 Shares 214,500 Est. Cost $17.44 Unrealized
CYMABAY THERAPEUTICS INC 0.2%
Value ($000) $4,140 Shares 450,000 Est. Cost $8.06 Unrealized
BCRX BIOCRYST PHARMACEUTICALS 0.2%
Value ($000) $3,989 Shares 812,500 Est. Cost $5.00 Unrealized -3.1%
PROTEOSTASIS THERAPEUTICS IN 0.2%
Value ($000) $3,935 Shares 675,000 Est. Cost $8.68 Unrealized
EGALET CORP 0.2%
Value ($000) $3,754 Shares 7,800,000 Est. Cost $0.76 Unrealized
NABRIVA THERAPEUTICS PLC 0.2%
Value ($000) $3,738 Shares 625,000 Est. Cost $10.11 Unrealized
MYOVANT SCIENCES LTD 0.2%
Value ($000) $3,730 Shares 295,100 Est. Cost $13.79 Unrealized
IRWD IRONWOOD PHARMACEUTICALS INC 0.2%
Value ($000) $3,373 Shares 225,000 Est. Cost $13.68 Unrealized -4.5%
MIRATI THERAPEUTICS INC 0.1%
Value ($000) $3,285 Shares 180,000 Est. Cost $18.25 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.1%
Value ($000) $3,273 Shares 175,000 Est. Cost $23.75 Unrealized
MEDICINES CO 0.1%
Value ($000) $3,171 Shares 3,000,000 Est. Cost $1.14 Unrealized
ADURO BIOTECH INC 0.1%
Value ($000) $3,113 Shares 415,000 Est. Cost $28.61 Unrealized
BMY BRISTOL MYERS SQUIBB CO 0.1%
Value ($000) $3,064 Shares 50,000 Est. Cost $42.96 Unrealized +8.1%
AGN 5.5 03/01/18 A ALLERGAN PLC 0.1%
Value ($000) $2,934 Shares 5,000 Est. Cost $1045.60 Unrealized
AEGLEA BIOTHERAPEUTICS INC 0.1%
Value ($000) $2,835 Shares 524,089 Est. Cost $4.86 Unrealized
INTRA CELLULAR THERAPIES INC 0.1%
Value ($000) $2,715 Shares 187,500 Est. Cost $39.54 Unrealized
NOVAVAX INC 0.1%
Value ($000) $2,480 Shares 2,000,000 Est. Cost $2.99 Unrealized
SERES THERAPEUTICS INC 0.1%
Value ($000) $2,231 Shares 220,000 Est. Cost $38.95 Unrealized
RYTM RHYTHM PHARMACEUTICALS INC 0.1%
Value ($000) $2,078 Shares 71,500 Est. Cost $26.40 Unrealized 0.0%
CGEN COMPUGEN LTD 0.1%
Value ($000) $2,063 Shares 825,000 Est. Cost $6.07 Unrealized -51.0%
CIDARA THERAPEUTICS INC 0.1%
Value ($000) $2,040 Shares 300,000 Est. Cost $13.32 Unrealized
CARDIOME PHARMA CORP 0.1%
Value ($000) $1,860 Shares 1,200,000 Est. Cost $8.88 Unrealized
DBV TECHNOLOGIES S A 0.1%
Value ($000) $1,796 Shares 73,000 Est. Cost $33.59 Unrealized
SCYNEXIS INC 0.1%
Value ($000) $1,763 Shares 760,000 Est. Cost $6.72 Unrealized
ALPINE IMMUNE SCIENCES INC 0.1%
Value ($000) $1,680 Shares 150,000 Est. Cost $11.60 Unrealized
ATYR PHARMA INC 0.1%
Value ($000) $1,663 Shares 475,000 Est. Cost $16.05 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value ($000) $1,645 Shares 1,500,000 Est. Cost $1.14 Unrealized
RADIUS HEALTH INC 0.1%
Value ($000) $1,418 Shares 1,500,000 Est. Cost $1.01 Unrealized
WRIGHT MED GROUP INC 0.0%
Value ($000) $1,031 Shares 1,000,000 Est. Cost $0.90 Unrealized
PRTA PROTHENA CORP PLC 0.0%
Value ($000) $937 Shares 25,000 Est. Cost $29.28 Unrealized +73.9%
CHIASMA INC 0.0%
Value ($000) $893 Shares 525,000 Est. Cost $18.65 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.0%
Value ($000) $548 Shares 270,000 Est. Cost $11.28 Unrealized -81.6%
OREXIGEN THERAPEUTICS INC 0.0%
Value ($000) $213 Shares 165,300 Est. Cost $3.32 Unrealized
DARE BIOSCIENCE INC 0.0%
Value ($000) $135 Shares 62,500 Est. Cost $3.12 Unrealized