Rock Springs Capital Management LP Diversified Active

CIK: 0001595725 · Show all filings

Period: Q4 2016 (← Previous) (Next →)

Filing Date: Feb 14, 2017

Total Value ($000): $1,494,403 (99.1% shares, 0.9% debt)

Holdings (133)

TESARO INC 5.5%
Value ($000) $82,503 Shares 613,500 Est. Cost $61.31 Unrealized
ALEXION PHARMACEUTICALS INC 3.8%
Value ($000) $56,893 Shares 465,000 Est. Cost $140.01 Unrealized
AETNA INC NEW 3.7%
Value ($000) $54,688 Shares 441,000 Est. Cost $102.02 Unrealized
MRK MERCK & CO INC 3.0%
Value ($000) $44,153 Shares 750,000 Est. Cost $43.81 Unrealized +0.6%
GW PHARMACEUTICALS PLC 2.7%
Value ($000) $39,783 Shares 356,000 Est. Cost $94.45 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 2.6%
Value ($000) $38,313 Shares 1,157,500 Est. Cost $57.66 Unrealized -32.7%
ALLERGAN PLC 2.3%
Value ($000) $34,862 Shares 166,000 Est. Cost $296.87 Unrealized
RADIUS HEALTH INC 2.3%
Value ($000) $34,617 Shares 910,250 Est. Cost $44.64 Unrealized
CIGNA CORPORATION 2.2%
Value ($000) $33,614 Shares 252,000 Est. Cost $116.35 Unrealized
WELLCARE HEALTH PLANS INC 2.2%
Value ($000) $32,145 Shares 234,500 Est. Cost $79.73 Unrealized
SPARK THERAPEUTICS INC 2.1%
Value ($000) $31,188 Shares 625,000 Est. Cost $58.29 Unrealized
ISRG INTUITIVE SURGICAL INC 2.0%
Value ($000) $30,440 Shares 48,000 Est. Cost $53.34 Unrealized +37.8%
ACRS ACLARIS THERAPEUTICS INC 2.0%
Value ($000) $29,854 Shares 1,100,000 Est. Cost $19.88 Unrealized +28.2%
ARDX ARDELYX INC 1.9%
Value ($000) $28,400 Shares 2,000,000 Est. Cost $11.10 Unrealized +27.9%
CELGENE CORP 1.9%
Value ($000) $28,069 Shares 242,500 Est. Cost $118.41 Unrealized
UNH UNITEDHEALTH GROUP INC 1.8%
Value ($000) $26,407 Shares 165,000 Est. Cost $129.15 Unrealized 0.0%
BMY BRISTOL MYERS SQUIBB CO 1.8%
Value ($000) $26,298 Shares 450,000 Est. Cost $42.96 Unrealized -8.0%
COLL COLLEGIUM PHARMACEUTICAL INC 1.7%
Value ($000) $24,912 Shares 1,600,000 Est. Cost $16.33 Unrealized +1.8%
ADVANCED ACCELERATOR APPLIC 1.7%
Value ($000) $24,887 Shares 930,000 Est. Cost $31.31 Unrealized
LLY LILLY ELI & CO 1.6%
Value ($000) $23,904 Shares 325,000 Est. Cost $60.99 Unrealized +5.3%
MEDICINES CO 1.6%
Value ($000) $23,741 Shares 699,500 Est. Cost $33.00 Unrealized
SHIRE PLC 1.6%
Value ($000) $23,376 Shares 137,200 Est. Cost $184.50 Unrealized
PCRX PACIRA PHARMACEUTICALS INC 1.5%
Value ($000) $23,030 Shares 713,000 Est. Cost $52.06 Unrealized -35.9%
GILD GILEAD SCIENCES INC 1.3%
Value ($000) $19,800 Shares 276,500 Est. Cost $55.61 Unrealized -4.4%
TBPH THERAVANCE BIOPHARMA INC 1.3%
Value ($000) $19,128 Shares 600,000 Est. Cost $19.05 Unrealized +62.9%
PEN PENUMBRA INC 1.3%
Value ($000) $18,853 Shares 295,500 Est. Cost $46.66 Unrealized +43.3%
INCY INCYTE CORP 1.1%
Value ($000) $16,946 Shares 169,000 Est. Cost $64.32 Unrealized +51.7%
PRA HEALTH SCIENCES INC 1.1%
Value ($000) $16,536 Shares 300,000 Est. Cost $29.06 Unrealized
NBIX NEUROCRINE BIOSCIENCES INC 1.1%
Value ($000) $15,867 Shares 410,000 Est. Cost $19.74 Unrealized +129.3%
AMARIN CORP PLC 1.0%
Value ($000) $15,374 Shares 4,991,500 Est. Cost $3.19 Unrealized
WRIGHT MED GROUP N V 1.0%
Value ($000) $15,328 Shares 667,000 Est. Cost $23.14 Unrealized
PRTA PROTHENA CORP PLC 1.0%
Value ($000) $15,224 Shares 309,500 Est. Cost $29.28 Unrealized +88.4%
AMGN AMGEN INC 0.9%
Value ($000) $14,109 Shares 96,500 Est. Cost $92.27 Unrealized +23.9%
CHRS COHERUS BIOSCIENCES INC 0.9%
Value ($000) $13,639 Shares 484,500 Est. Cost $21.64 Unrealized +29.3%
JAZZ JAZZ PHARMACEUTICALS PLC 0.9%
Value ($000) $13,487 Shares 123,700 Est. Cost $146.27 Unrealized -23.8%
GLPG GALAPAGOS NV 0.9%
Value ($000) $13,480 Shares 210,000 Est. Cost $48.55 Unrealized
WTW WILLIS TOWERS WATSON PUB LTD 0.9%
Value ($000) $13,451 Shares 110,000 Est. Cost $109.36 Unrealized +0.3%
BIIB BIOGEN INC 0.9%
Value ($000) $13,328 Shares 47,000 Est. Cost $273.82 Unrealized +8.3%
WALGREENS BOOTS ALLIANCE INC 0.9%
Value ($000) $13,324 Shares 161,000 Est. Cost $84.02 Unrealized
RA PHARMACEUTICALS INC 0.8%
Value ($000) $12,547 Shares 826,000 Est. Cost $15.19 Unrealized
DHR DANAHER CORP DEL 0.8%
Value ($000) $12,454 Shares 160,000 Est. Cost $67.27 Unrealized -1.3%
PATHEON N V 0.8%
Value ($000) $11,484 Shares 400,000 Est. Cost $29.63 Unrealized
EW EDWARDS LIFESCIENCES CORP 0.8%
Value ($000) $11,291 Shares 120,500 Est. Cost $30.34 Unrealized +6.8%
RARE ULTRAGENYX PHARMACEUTICAL IN 0.8%
Value ($000) $11,232 Shares 159,750 Est. Cost $61.83 Unrealized +14.7%
DERMIRA INC 0.7%
Value ($000) $10,998 Shares 362,600 Est. Cost $20.75 Unrealized
HEALTHSOUTH CORP 0.7%
Value ($000) $10,929 Shares 265,000 Est. Cost $41.93 Unrealized
HOLX HOLOGIC INC 0.7%
Value ($000) $10,632 Shares 265,000 Est. Cost $35.08 Unrealized +10.0%
BMRN BIOMARIN PHARMACEUTICAL INC 0.7%
Value ($000) $10,355 Shares 125,000 Est. Cost $100.37 Unrealized -14.3%
THERAPEUTICSMD INC 0.7%
Value ($000) $9,924 Shares 1,720,000 Est. Cost $7.12 Unrealized
RETROPHIN INC 0.7%
Value ($000) $9,881 Shares 522,000 Est. Cost $23.91 Unrealized
INVITAE CORP 0.6%
Value ($000) $9,528 Shares 1,200,000 Est. Cost $10.63 Unrealized
ENVISION HEALTHCARE CORP 0.6%
Value ($000) $9,177 Shares 145,000 Est. Cost $63.29 Unrealized
AUDENTES THERAPEUTICS INC 0.6%
Value ($000) $8,861 Shares 485,000 Est. Cost $17.81 Unrealized
MERUS N V 0.6%
Value ($000) $8,444 Shares 400,000 Est. Cost $9.03 Unrealized
CLEARSIDE BIOMEDICAL INC 0.6%
Value ($000) $8,359 Shares 935,000 Est. Cost $7.01 Unrealized
FIVE PRIME THERAPEUTICS INC 0.5%
Value ($000) $8,218 Shares 164,000 Est. Cost $27.02 Unrealized
PARATEK PHARMACEUTICALS INC 0.5%
Value ($000) $8,093 Shares 525,500 Est. Cost $14.59 Unrealized
ONC BEIGENE LTD 0.5%
Value ($000) $8,045 Shares 265,000 Est. Cost $29.47 Unrealized
REGN REGENERON PHARMACEUTICALS 0.5%
Value ($000) $7,158 Shares 19,500 Est. Cost $400.92 Unrealized -5.7%
LGND LIGAND PHARMACEUTICALS INC 0.5%
Value ($000) $7,113 Shares 70,000 Est. Cost $72.69 Unrealized -13.2%
ALKS ALKERMES PLC 0.5%
Value ($000) $6,948 Shares 125,000 Est. Cost $39.49 Unrealized +35.4%
EPIZYME INC 0.5%
Value ($000) $6,897 Shares 570,000 Est. Cost $17.19 Unrealized
EGALET CORP 0.5%
Value ($000) $6,791 Shares 7,800,000 Est. Cost $0.76 Unrealized
AVEXIS INC 0.4%
Value ($000) $6,682 Shares 140,000 Est. Cost $27.24 Unrealized
VRTX VERTEX PHARMACEUTICALS INC 0.4%
Value ($000) $6,612 Shares 89,750 Est. Cost $85.36 Unrealized -4.7%
ATHENAHEALTH INC 0.4%
Value ($000) $6,599 Shares 62,750 Est. Cost $115.55 Unrealized
ASND ASCENDIS PHARMA A S 0.4%
Value ($000) $6,578 Shares 325,000 Est. Cost $17.44 Unrealized
CRVS CORVUS PHARMACEUTICALS INC 0.4%
Value ($000) $6,435 Shares 450,000 Est. Cost $14.35 Unrealized +6.0%
INSM INSMED INC 0.4%
Value ($000) $6,192 Shares 468,000 Est. Cost $16.84 Unrealized -19.0%
RTI SURGICAL INC 0.4%
Value ($000) $6,045 Shares 1,860,000 Est. Cost $4.28 Unrealized
EXAS EXACT SCIENCES CORP 0.4%
Value ($000) $6,024 Shares 450,900 Est. Cost $17.57 Unrealized -8.1%
AIMMUNE THERAPEUTICS INC 0.4%
Value ($000) $5,992 Shares 293,000 Est. Cost $22.58 Unrealized
ACHILLION PHARMACEUTICALS IN 0.4%
Value ($000) $5,679 Shares 1,375,000 Est. Cost $9.51 Unrealized
PROTEOSTASIS THERAPEUTICS IN 0.4%
Value ($000) $5,517 Shares 450,000 Est. Cost $10.10 Unrealized
CHINA CORD BLOOD CORP 0.4%
Value ($000) $5,386 Shares 880,000 Est. Cost $4.24 Unrealized
SRPT SAREPTA THERAPEUTICS INC 0.4%
Value ($000) $5,264 Shares 191,900 Est. Cost $30.88 Unrealized +30.1%
FIBROGEN INC 0.3%
Value ($000) $5,136 Shares 240,000 Est. Cost $25.02 Unrealized
CLOVIS ONCOLOGY INC 0.3%
Value ($000) $4,886 Shares 110,000 Est. Cost $35.00 Unrealized
MEDP MEDPACE HLDGS INC 0.3%
Value ($000) $4,869 Shares 135,000 Est. Cost $29.20 Unrealized +14.1%
ASSEMBLY BIOSCIENCES INC 0.3%
Value ($000) $4,739 Shares 390,000 Est. Cost $12.30 Unrealized
ADURO BIOTECH INC 0.3%
Value ($000) $4,731 Shares 415,000 Est. Cost $28.61 Unrealized
MGNX MACROGENICS INC 0.3%
Value ($000) $4,599 Shares 225,000 Est. Cost $32.43 Unrealized -22.4%
1741046D STERIS PLC 0.3%
Value ($000) $4,380 Shares 65,000 Est. Cost $68.22 Unrealized
CGEN COMPUGEN LTD 0.3%
Value ($000) $4,208 Shares 825,000 Est. Cost $6.07 Unrealized -1.3%
INTERSECT ENT INC 0.3%
Value ($000) $4,175 Shares 345,000 Est. Cost $25.70 Unrealized
NOVADAQ TECHNOLOGIES INC 0.3%
Value ($000) $3,935 Shares 555,000 Est. Cost $14.29 Unrealized
AGN 5.5 03/01/18 A ALLERGAN PLC 0.3%
Value ($000) $3,820 Shares 5,000 Est. Cost $1045.60 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.3%
Value ($000) $3,786 Shares 182,000 Est. Cost $24.71 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.3%
Value ($000) $3,765 Shares 757,500 Est. Cost $10.68 Unrealized -35.2%
JUNO THERAPEUTICS INC 0.2%
Value ($000) $3,713 Shares 197,001 Est. Cost $52.64 Unrealized
MEDICINES CO 0.2%
Value ($000) $3,611 Shares 3,000,000 Est. Cost $1.14 Unrealized
INVA INNOVIVA INC 0.2%
Value ($000) $3,605 Shares 336,900 Est. Cost $11.83 Unrealized -11.3%
KITE PHARMA INC 0.2%
Value ($000) $3,542 Shares 79,000 Est. Cost $46.24 Unrealized
OTONOMY INC 0.2%
Value ($000) $3,339 Shares 210,000 Est. Cost $21.56 Unrealized
CARDIOME PHARMA CORP 0.2%
Value ($000) $3,312 Shares 1,200,000 Est. Cost $8.88 Unrealized
NABRIVA THERAPEUTICS AG 0.2%
Value ($000) $3,124 Shares 525,000 Est. Cost $8.51 Unrealized
CIDARA THERAPEUTICS INC 0.2%
Value ($000) $3,120 Shares 300,000 Est. Cost $13.32 Unrealized
ARIAD PHARMACEUTICALS INC 0.2%
Value ($000) $3,110 Shares 250,000 Est. Cost $12.56 Unrealized
PBYI PUMA BIOTECHNOLOGY INC 0.2%
Value ($000) $2,901 Shares 94,500 Est. Cost $61.37 Unrealized -29.6%
INTRA CELLULAR THERAPIES INC 0.2%
Value ($000) $2,867 Shares 190,000 Est. Cost $39.54 Unrealized
TETRAPHASE PHARMACEUTICALS I 0.2%
Value ($000) $2,813 Shares 698,000 Est. Cost $5.86 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.2%
Value ($000) $2,734 Shares 675,000 Est. Cost $18.26 Unrealized
HILL ROM HLDGS INC 0.2%
Value ($000) $2,667 Shares 47,500 Est. Cost $50.45 Unrealized
EXEL EXELIXIS INC 0.2%
Value ($000) $2,609 Shares 175,000 Est. Cost $11.85 Unrealized +21.8%
MDGL MADRIGAL PHARMACEUTICALS INC 0.2%
Value ($000) $2,606 Shares 174,891 Est. Cost $13.77 Unrealized +16.7%
DBV TECHNOLOGIES S A 0.2%
Value ($000) $2,564 Shares 73,000 Est. Cost $33.59 Unrealized
SCYNEXIS INC 0.2%
Value ($000) $2,424 Shares 760,000 Est. Cost $6.72 Unrealized
RIGEL PHARMACEUTICALS INC 0.2%
Value ($000) $2,380 Shares 1,000,000 Est. Cost $2.73 Unrealized
EGALET CORP 0.2%
Value ($000) $2,295 Shares 300,000 Est. Cost $13.18 Unrealized
AEGLEA BIOTHERAPEUTICS INC 0.2%
Value ($000) $2,280 Shares 524,089 Est. Cost $4.86 Unrealized
ZBH ZIMMER BIOMET HLDGS INC 0.1%
Value ($000) $2,178 Shares 21,100 Est. Cost $99.44 Unrealized 0.0%
SERES THERAPEUTICS INC 0.1%
Value ($000) $2,178 Shares 220,000 Est. Cost $38.95 Unrealized
HQY HEALTHEQUITY INC 0.1%
Value ($000) $2,026 Shares 50,000 Est. Cost $38.65 Unrealized 0.0%
GENOCEA BIOSCIENCES INC 0.1%
Value ($000) $1,978 Shares 480,000 Est. Cost $6.85 Unrealized
BLUEBIRD BIO INC 0.1%
Value ($000) $1,758 Shares 28,500 Est. Cost $106.67 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value ($000) $1,713 Shares 1,500,000 Est. Cost $1.14 Unrealized
NVCR NOVOCURE LTD 0.1%
Value ($000) $1,682 Shares 214,316 Est. Cost $23.86 Unrealized -66.3%
GLOBAL BLOOD THERAPEUTICS IN 0.1%
Value ($000) $1,394 Shares 96,500 Est. Cost $33.88 Unrealized
TANDEM DIABETES CARE INC 0.1%
Value ($000) $1,279 Shares 595,000 Est. Cost $13.40 Unrealized
DIMENSION THERAPEUTICS INC 0.1%
Value ($000) $1,180 Shares 271,370 Est. Cost $11.28 Unrealized
MYOVANT SCIENCES LTD 0.1%
Value ($000) $1,115 Shares 89,600 Est. Cost $12.44 Unrealized
NIVALIS THERAPEUTICS INC 0.1%
Value ($000) $1,095 Shares 489,000 Est. Cost $15.15 Unrealized
WRIGHT MED GROUP INC 0.1%
Value ($000) $1,047 Shares 1,000,000 Est. Cost $0.90 Unrealized
VALEANT PHARMACEUTICALS INTL 0.1%
Value ($000) $1,037 Shares 71,400 Est. Cost $162.66 Unrealized
NOVAVAX INC 0.1%
Value ($000) $1,033 Shares 820,000 Est. Cost $5.52 Unrealized
ATYR PHARMA INC 0.1%
Value ($000) $1,021 Shares 475,000 Est. Cost $16.05 Unrealized
CHIASMA INC 0.1%
Value ($000) $960 Shares 492,500 Est. Cost $19.77 Unrealized
PRGO PERRIGO CO PLC 0.1%
Value ($000) $774 Shares 9,300 Est. Cost $143.33 Unrealized -39.5%
DYNAVAX TECHNOLOGIES CORP 0.0%
Value ($000) $652 Shares 165,000 Est. Cost $24.06 Unrealized
CERULEAN PHARMA INC 0.0%
Value ($000) $443 Shares 625,000 Est. Cost $5.94 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.0%
Value ($000) $365 Shares 270,000 Est. Cost $11.28 Unrealized -88.4%
OREXIGEN THERAPEUTICS INC 0.0%
Value ($000) $288 Shares 165,300 Est. Cost $3.32 Unrealized
ANTHERA PHARMACEUTICALS INC 0.0%
Value ($000) $247 Shares 380,000 Est. Cost $4.67 Unrealized