Rock Springs Capital Management LP Diversified Active

CIK: 0001595725 · Show all filings

Period: Q1 2017 (← Previous) (Next →)

Filing Date: May 15, 2017

Total Value ($000): $1,733,063 (99.2% shares, 0.8% debt)

Holdings (140)

TESARO INC 4.2%
Value ($000) $73,073 Shares 474,900 Est. Cost $61.31 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 3.2%
Value ($000) $55,590 Shares 1,275,000 Est. Cost $56.08 Unrealized -27.7%
ALEXION PHARMACEUTICALS INC 3.2%
Value ($000) $55,395 Shares 456,900 Est. Cost $140.01 Unrealized
MRK MERCK & CO INC 2.7%
Value ($000) $47,655 Shares 750,000 Est. Cost $43.81 Unrealized +5.1%
PCRX PACIRA PHARMACEUTICALS INC 2.6%
Value ($000) $45,600 Shares 1,000,000 Est. Cost $49.52 Unrealized -12.7%
GW PHARMACEUTICALS PLC 2.5%
Value ($000) $43,115 Shares 356,500 Est. Cost $94.45 Unrealized
ALLERGAN PLC 2.3%
Value ($000) $39,661 Shares 166,000 Est. Cost $296.87 Unrealized
CIGNA CORPORATION 2.3%
Value ($000) $39,552 Shares 270,000 Est. Cost $118.36 Unrealized
ISRG INTUITIVE SURGICAL INC 2.1%
Value ($000) $36,791 Shares 48,000 Est. Cost $53.34 Unrealized +48.1%
RADIUS HEALTH INC 2.0%
Value ($000) $35,181 Shares 910,250 Est. Cost $44.64 Unrealized
MEDICINES CO 2.0%
Value ($000) $34,230 Shares 700,000 Est. Cost $33.00 Unrealized
ADVANCED ACCELERATOR APPLIC 2.0%
Value ($000) $33,881 Shares 850,000 Est. Cost $31.31 Unrealized
SPARK THERAPEUTICS INC 1.9%
Value ($000) $33,338 Shares 625,000 Est. Cost $58.29 Unrealized
WELLCARE HEALTH PLANS INC 1.9%
Value ($000) $32,879 Shares 234,500 Est. Cost $79.73 Unrealized
CELGENE CORP 1.7%
Value ($000) $30,174 Shares 242,500 Est. Cost $118.41 Unrealized
PRA HEALTH SCIENCES INC 1.7%
Value ($000) $29,843 Shares 457,500 Est. Cost $41.51 Unrealized
AETNA INC NEW 1.6%
Value ($000) $28,061 Shares 220,000 Est. Cost $102.02 Unrealized
LLY LILLY ELI & CO 1.6%
Value ($000) $27,336 Shares 325,000 Est. Cost $60.99 Unrealized +14.0%
HUM HUMANA INC 1.6%
Value ($000) $27,314 Shares 132,500 Est. Cost $191.96 Unrealized 0.0%
UNH UNITEDHEALTH GROUP INC 1.6%
Value ($000) $27,062 Shares 165,000 Est. Cost $129.15 Unrealized +10.0%
PEN PENUMBRA INC 1.5%
Value ($000) $25,911 Shares 310,500 Est. Cost $48.06 Unrealized +57.5%
ARDX ARDELYX INC 1.5%
Value ($000) $25,300 Shares 2,000,000 Est. Cost $11.10 Unrealized +18.6%
BMY BRISTOL MYERS SQUIBB CO 1.4%
Value ($000) $24,612 Shares 452,600 Est. Cost $42.96 Unrealized -7.0%
SHIRE PLC 1.4%
Value ($000) $24,201 Shares 138,900 Est. Cost $184.37 Unrealized
INCY INCYTE CORP 1.3%
Value ($000) $22,590 Shares 169,000 Est. Cost $64.32 Unrealized +97.9%
TBPH THERAVANCE BIOPHARMA INC 1.3%
Value ($000) $22,092 Shares 600,000 Est. Cost $19.05 Unrealized +67.7%
JNJ JOHNSON & JOHNSON 1.3%
Value ($000) $21,796 Shares 175,000 Est. Cost $93.39 Unrealized 0.0%
WRIGHT MED GROUP N V 1.2%
Value ($000) $20,850 Shares 670,000 Est. Cost $23.14 Unrealized
ACRS ACLARIS THERAPEUTICS INC 1.2%
Value ($000) $20,129 Shares 675,000 Est. Cost $19.88 Unrealized +45.0%
GILD GILEAD SCIENCES INC 1.1%
Value ($000) $19,459 Shares 286,500 Est. Cost $55.44 Unrealized -8.6%
GLPG GALAPAGOS NV 1.0%
Value ($000) $18,100 Shares 210,000 Est. Cost $48.55 Unrealized
JAZZ JAZZ PHARMACEUTICALS PLC 1.0%
Value ($000) $17,953 Shares 123,700 Est. Cost $146.27 Unrealized -11.0%
NBIX NEUROCRINE BIOSCIENCES INC 1.0%
Value ($000) $17,753 Shares 410,000 Est. Cost $19.74 Unrealized +117.1%
PRTA PROTHENA CORP PLC 1.0%
Value ($000) $17,267 Shares 309,500 Est. Cost $29.28 Unrealized +79.4%
COLL COLLEGIUM PHARMACEUTICAL INC 1.0%
Value ($000) $17,102 Shares 1,700,000 Est. Cost $16.24 Unrealized -8.5%
RA PHARMACEUTICALS INC 1.0%
Value ($000) $16,797 Shares 788,959 Est. Cost $15.19 Unrealized
AMGN AMGEN INC 0.9%
Value ($000) $16,079 Shares 98,000 Est. Cost $92.81 Unrealized +37.0%
AMARIN CORP PLC 0.9%
Value ($000) $16,004 Shares 5,001,200 Est. Cost $3.19 Unrealized
HOLX HOLOGIC INC 0.8%
Value ($000) $14,467 Shares 340,000 Est. Cost $36.33 Unrealized +12.2%
WTW WILLIS TOWERS WATSON PUB LTD 0.8%
Value ($000) $14,398 Shares 110,000 Est. Cost $109.36 Unrealized +2.7%
CHRS COHERUS BIOSCIENCES INC 0.8%
Value ($000) $14,276 Shares 675,000 Est. Cost $22.48 Unrealized +9.4%
DHR DANAHER CORP DEL 0.8%
Value ($000) $13,685 Shares 160,000 Est. Cost $67.27 Unrealized +5.9%
EW EDWARDS LIFESCIENCES CORP 0.8%
Value ($000) $13,405 Shares 142,500 Est. Cost $30.49 Unrealized +2.7%
WALGREENS BOOTS ALLIANCE INC 0.8%
Value ($000) $13,371 Shares 161,000 Est. Cost $84.02 Unrealized
INVITAE CORP 0.8%
Value ($000) $13,272 Shares 1,200,000 Est. Cost $10.63 Unrealized
DERMIRA INC 0.8%
Value ($000) $13,221 Shares 387,600 Est. Cost $21.61 Unrealized
BIIB BIOGEN INC 0.8%
Value ($000) $13,124 Shares 48,000 Est. Cost $274.00 Unrealized +3.2%
CLOVIS ONCOLOGY INC 0.7%
Value ($000) $11,747 Shares 184,500 Est. Cost $46.58 Unrealized
THERAPEUTICSMD INC 0.7%
Value ($000) $11,520 Shares 1,600,000 Est. Cost $7.12 Unrealized
HEALTHSOUTH CORP 0.7%
Value ($000) $11,345 Shares 265,000 Est. Cost $41.93 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.6%
Value ($000) $10,973 Shares 125,000 Est. Cost $100.37 Unrealized -11.4%
ALMOST FAMILY INC 0.6%
Value ($000) $10,935 Shares 225,000 Est. Cost $48.60 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.6%
Value ($000) $10,828 Shares 159,750 Est. Cost $61.83 Unrealized +23.3%
AVEXIS INC 0.6%
Value ($000) $10,644 Shares 140,000 Est. Cost $27.24 Unrealized
PATHEON N V 0.6%
Value ($000) $10,536 Shares 400,000 Est. Cost $29.63 Unrealized
PARATEK PHARMACEUTICALS INC 0.6%
Value ($000) $10,116 Shares 525,500 Est. Cost $14.59 Unrealized
ASSEMBLY BIOSCIENCES INC 0.6%
Value ($000) $9,941 Shares 390,000 Est. Cost $12.30 Unrealized
VRTX VERTEX PHARMACEUTICALS INC 0.6%
Value ($000) $9,896 Shares 90,500 Est. Cost $85.36 Unrealized +3.1%
EPIZYME INC 0.6%
Value ($000) $9,776 Shares 570,000 Est. Cost $17.19 Unrealized
ONC BEIGENE LTD 0.6%
Value ($000) $9,702 Shares 265,000 Est. Cost $29.47 Unrealized
MERUS N V 0.5%
Value ($000) $9,379 Shares 384,548 Est. Cost $9.03 Unrealized
ASND ASCENDIS PHARMA A S 0.5%
Value ($000) $9,100 Shares 325,000 Est. Cost $17.44 Unrealized
ENVISION HEALTHCARE CORP 0.5%
Value ($000) $8,891 Shares 145,000 Est. Cost $63.29 Unrealized
CRVS CORVUS PHARMACEUTICALS INC 0.5%
Value ($000) $8,777 Shares 422,600 Est. Cost $14.35 Unrealized +9.2%
OBSEVA SA 0.5%
Value ($000) $8,730 Shares 838,634 Est. Cost $10.41 Unrealized
AUDENTES THERAPEUTICS INC 0.5%
Value ($000) $8,520 Shares 500,000 Est. Cost $17.79 Unrealized
INSM INSMED INC 0.5%
Value ($000) $8,195 Shares 468,000 Est. Cost $16.84 Unrealized -8.4%
EXAS EXACT SCIENCES CORP 0.5%
Value ($000) $7,972 Shares 337,500 Est. Cost $17.57 Unrealized +12.8%
LOXO ONCOLOGY INC 0.4%
Value ($000) $7,616 Shares 181,000 Est. Cost $42.08 Unrealized
RTI SURGICAL INC 0.4%
Value ($000) $7,440 Shares 1,860,000 Est. Cost $4.28 Unrealized
CLEARSIDE BIOMEDICAL INC 0.4%
Value ($000) $7,424 Shares 935,000 Est. Cost $7.01 Unrealized
RETROPHIN INC 0.4%
Value ($000) $7,384 Shares 400,000 Est. Cost $23.91 Unrealized
ALKS ALKERMES PLC 0.4%
Value ($000) $7,313 Shares 125,000 Est. Cost $39.49 Unrealized +43.6%
ATHENAHEALTH INC 0.4%
Value ($000) $7,071 Shares 62,750 Est. Cost $115.55 Unrealized
EGALET CORP 0.4%
Value ($000) $6,455 Shares 7,800,000 Est. Cost $0.76 Unrealized
TETRAPHASE PHARMACEUTICALS I 0.4%
Value ($000) $6,415 Shares 698,000 Est. Cost $5.86 Unrealized
AIMMUNE THERAPEUTICS INC 0.4%
Value ($000) $6,367 Shares 293,000 Est. Cost $22.58 Unrealized
ACHILLION PHARMACEUTICALS IN 0.4%
Value ($000) $6,315 Shares 1,500,000 Est. Cost $9.07 Unrealized
NABRIVA THERAPEUTICS AG 0.4%
Value ($000) $6,300 Shares 525,000 Est. Cost $8.51 Unrealized
FIVE PRIME THERAPEUTICS INC 0.3%
Value ($000) $5,965 Shares 165,000 Est. Cost $27.02 Unrealized
INTERSECT ENT INC 0.3%
Value ($000) $5,917 Shares 345,000 Est. Cost $25.70 Unrealized
FIBROGEN INC 0.3%
Value ($000) $5,916 Shares 240,000 Est. Cost $25.02 Unrealized
CHINA CORD BLOOD CORP 0.3%
Value ($000) $5,861 Shares 880,000 Est. Cost $4.24 Unrealized
REGN REGENERON PHARMACEUTICALS 0.3%
Value ($000) $5,851 Shares 15,100 Est. Cost $400.92 Unrealized -8.1%
SRPT SAREPTA THERAPEUTICS INC 0.3%
Value ($000) $5,742 Shares 194,000 Est. Cost $30.88 Unrealized +0.2%
GLOBAL BLOOD THERAPEUTICS IN 0.3%
Value ($000) $5,528 Shares 150,000 Est. Cost $34.94 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.3%
Value ($000) $5,401 Shares 757,500 Est. Cost $10.68 Unrealized -40.8%
LGND LIGAND PHARMACEUTICALS INC 0.3%
Value ($000) $5,292 Shares 50,000 Est. Cost $72.69 Unrealized -9.5%
KITE PHARMA INC 0.3%
Value ($000) $5,259 Shares 67,000 Est. Cost $46.24 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.3%
Value ($000) $4,821 Shares 875,000 Est. Cost $15.34 Unrealized
MEDICINES CO 0.3%
Value ($000) $4,744 Shares 3,000,000 Est. Cost $1.14 Unrealized
1741046D STERIS PLC 0.3%
Value ($000) $4,515 Shares 65,000 Est. Cost $68.22 Unrealized
ADURO BIOTECH INC 0.3%
Value ($000) $4,461 Shares 415,000 Est. Cost $28.61 Unrealized
JUNO THERAPEUTICS INC 0.3%
Value ($000) $4,371 Shares 197,001 Est. Cost $52.64 Unrealized
NOVADAQ TECHNOLOGIES INC 0.2%
Value ($000) $4,323 Shares 555,000 Est. Cost $14.29 Unrealized
AGN 5.5 03/01/18 A ALLERGAN PLC 0.2%
Value ($000) $4,242 Shares 5,000 Est. Cost $1045.60 Unrealized
MGNX MACROGENICS INC 0.2%
Value ($000) $4,185 Shares 225,000 Est. Cost $32.43 Unrealized -40.5%
AEGLEA BIOTHERAPEUTICS INC 0.2%
Value ($000) $3,904 Shares 524,089 Est. Cost $4.86 Unrealized
EXEL EXELIXIS INC 0.2%
Value ($000) $3,792 Shares 175,000 Est. Cost $11.85 Unrealized +71.7%
ALDER BIOPHARMACEUTICALS INC 0.2%
Value ($000) $3,786 Shares 182,000 Est. Cost $24.71 Unrealized
CARDIOME PHARMA CORP 0.2%
Value ($000) $3,612 Shares 1,200,000 Est. Cost $8.88 Unrealized
CGEN COMPUGEN LTD 0.2%
Value ($000) $3,548 Shares 825,000 Est. Cost $6.07 Unrealized -23.9%
PROTEOSTASIS THERAPEUTICS IN 0.2%
Value ($000) $3,519 Shares 450,000 Est. Cost $10.10 Unrealized
PBYI PUMA BIOTECHNOLOGY INC 0.2%
Value ($000) $3,515 Shares 94,500 Est. Cost $61.37 Unrealized -40.5%
MDGL MADRIGAL PHARMACEUTICALS INC 0.2%
Value ($000) $3,465 Shares 225,000 Est. Cost $14.21 Unrealized +10.7%
RIGEL PHARMACEUTICALS INC 0.2%
Value ($000) $3,310 Shares 1,000,000 Est. Cost $2.73 Unrealized
INVA INNOVIVA INC 0.2%
Value ($000) $3,250 Shares 235,000 Est. Cost $11.83 Unrealized -0.5%
GKOS GLAUKOS CORP 0.2%
Value ($000) $3,206 Shares 62,500 Est. Cost $43.59 Unrealized 0.0%
HILL ROM HLDGS INC 0.2%
Value ($000) $3,177 Shares 45,000 Est. Cost $50.45 Unrealized
INTRA CELLULAR THERAPIES INC 0.2%
Value ($000) $3,088 Shares 190,000 Est. Cost $39.54 Unrealized
GENOCEA BIOSCIENCES INC 0.2%
Value ($000) $2,923 Shares 480,000 Est. Cost $6.85 Unrealized
BLUEBIRD BIO INC 0.2%
Value ($000) $2,772 Shares 30,500 Est. Cost $105.64 Unrealized
CARA THERAPEUTICS INC 0.2%
Value ($000) $2,759 Shares 150,000 Est. Cost $18.39 Unrealized
ZBH ZIMMER BIOMET HLDGS INC 0.1%
Value ($000) $2,577 Shares 21,100 Est. Cost $99.44 Unrealized +6.0%
OTONOMY INC 0.1%
Value ($000) $2,573 Shares 210,000 Est. Cost $21.56 Unrealized
DBV TECHNOLOGIES S A 0.1%
Value ($000) $2,571 Shares 73,000 Est. Cost $33.59 Unrealized
SERES THERAPEUTICS INC 0.1%
Value ($000) $2,479 Shares 220,000 Est. Cost $38.95 Unrealized
CIDARA THERAPEUTICS INC 0.1%
Value ($000) $2,340 Shares 300,000 Est. Cost $13.32 Unrealized
NEURODERM LTD 0.1%
Value ($000) $2,232 Shares 84,079 Est. Cost $26.55 Unrealized
HQY HEALTHEQUITY INC 0.1%
Value ($000) $2,123 Shares 50,000 Est. Cost $38.65 Unrealized +14.5%
SCYNEXIS INC 0.1%
Value ($000) $2,098 Shares 760,000 Est. Cost $6.72 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value ($000) $1,899 Shares 1,500,000 Est. Cost $1.14 Unrealized
MYOVANT SCIENCES LTD 0.1%
Value ($000) $1,761 Shares 150,000 Est. Cost $12.16 Unrealized
NIVALIS THERAPEUTICS INC 0.1%
Value ($000) $1,752 Shares 600,000 Est. Cost $12.89 Unrealized
NVCR NOVOCURE LTD 0.1%
Value ($000) $1,736 Shares 214,316 Est. Cost $23.86 Unrealized -69.7%
ATYR PHARMA INC 0.1%
Value ($000) $1,663 Shares 475,000 Est. Cost $16.05 Unrealized
NEWLINK GENETICS CORP 0.1%
Value ($000) $1,616 Shares 67,071 Est. Cost $24.09 Unrealized
EGALET CORP 0.1%
Value ($000) $1,530 Shares 300,000 Est. Cost $13.18 Unrealized
WRIGHT MED GROUP INC 0.1%
Value ($000) $1,198 Shares 1,000,000 Est. Cost $0.90 Unrealized
NOVAVAX INC 0.1%
Value ($000) $1,050 Shares 820,000 Est. Cost $5.52 Unrealized
PRGO PERRIGO CO PLC 0.1%
Value ($000) $1,036 Shares 15,600 Est. Cost $116.16 Unrealized -34.5%
DYNAVAX TECHNOLOGIES CORP 0.1%
Value ($000) $982 Shares 165,000 Est. Cost $24.06 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.1%
Value ($000) $872 Shares 270,000 Est. Cost $11.28 Unrealized -78.2%
CHIASMA INC 0.0%
Value ($000) $837 Shares 492,500 Est. Cost $19.77 Unrealized
VALEANT PHARMACEUTICALS INTL 0.0%
Value ($000) $732 Shares 66,400 Est. Cost $162.66 Unrealized
TANDEM DIABETES CARE INC 0.0%
Value ($000) $714 Shares 595,000 Est. Cost $13.40 Unrealized
OREXIGEN THERAPEUTICS INC 0.0%
Value ($000) $569 Shares 165,300 Est. Cost $3.32 Unrealized
ANTHERA PHARMACEUTICALS INC 0.0%
Value ($000) $552 Shares 1,296,568 Est. Cost $1.67 Unrealized
CERULEAN PHARMA INC 0.0%
Value ($000) $508 Shares 625,000 Est. Cost $5.94 Unrealized
DIMENSION THERAPEUTICS INC 0.0%
Value ($000) $475 Shares 271,370 Est. Cost $11.28 Unrealized