Rock Springs Capital Management LP Diversified Active

Location: Baltimore, MD

CIK: 0001595725 · Show all filings

Period: Q3 2017 (← Previous) (Next →)

Filing Date: Nov 14, 2017

Total Value: $2.168B (99.2% shares, 0.8% debt)

Holdings (147)

UNH UNITEDHEALTH GROUP INC 4.1%
Value $89.89M Shares 459,000 Est. Cost $149.36 Unrealized +13.1%
ALEXION PHARMACEUTICALS INC 3.0%
Value $64.95M Shares 463,000 Est. Cost $139.77 Unrealized
TESARO INC 2.9%
Value $63.94M Shares 495,250 Est. Cost $63.80 Unrealized
AETNA INC NEW 2.9%
Value $63.45M Shares 399,000 Est. Cost $124.56 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 2.9%
Value $62.33M Shares 1,305,000 Est. Cost $55.43 Unrealized -12.1%
SPARK THERAPEUTICS INC 2.5%
Value $53.23M Shares 597,000 Est. Cost $58.29 Unrealized
ADVANCED ACCELERATOR APPLIC 2.4%
Value $53.05M Shares 784,500 Est. Cost $31.31 Unrealized
CIGNA CORPORATION 2.3%
Value $50.47M Shares 270,000 Est. Cost $118.36 Unrealized
ISRG INTUITIVE SURGICAL INC 2.3%
Value $50.2M Shares 48,000 Est. Cost $53.34 Unrealized +104.3%
MRK MERCK & CO INC 2.2%
Value $48.53M Shares 758,000 Est. Cost $43.84 Unrealized +6.5%
PCRX PACIRA PHARMACEUTICALS INC 1.9%
Value $40.85M Shares 1,088,000 Est. Cost $49.01 Unrealized -17.9%
PBYI PUMA BIOTECHNOLOGY INC 1.8%
Value $39.52M Shares 330,000 Est. Cost $73.67 Unrealized +26.2%
CELGENE CORP 1.8%
Value $38.28M Shares 262,500 Est. Cost $120.35 Unrealized
GW PHARMACEUTICALS PLC 1.7%
Value $37.86M Shares 373,000 Est. Cost $94.73 Unrealized
PRA HEALTH SCIENCES INC 1.7%
Value $36.37M Shares 477,500 Est. Cost $42.95 Unrealized
RADIUS HEALTH INC 1.7%
Value $36.35M Shares 943,000 Est. Cost $44.43 Unrealized
WELLCARE HEALTH PLANS INC 1.6%
Value $33.92M Shares 197,500 Est. Cost $79.73 Unrealized
MOH MOLINA HEALTHCARE INC 1.3%
Value $29.05M Shares 422,500 Est. Cost $62.77 Unrealized +3.7%
ONC BEIGENE LTD 1.3%
Value $28.97M Shares 280,000 Est. Cost $33.43 Unrealized
PEN PENUMBRA INC 1.3%
Value $28.04M Shares 310,500 Est. Cost $48.06 Unrealized +79.2%
NBIX NEUROCRINE BIOSCIENCES INC 1.2%
Value $26.96M Shares 440,000 Est. Cost $21.90 Unrealized +140.9%
LOXO ONCOLOGY INC 1.2%
Value $26.3M Shares 285,500 Est. Cost $56.24 Unrealized
EPIZYME INC 1.2%
Value $25.72M Shares 1,350,000 Est. Cost $16.49 Unrealized
MEDICINES CO 1.2%
Value $25.56M Shares 690,000 Est. Cost $33.00 Unrealized
GILD GILEAD SCIENCES INC 1.2%
Value $25.39M Shares 313,400 Est. Cost $54.83 Unrealized +2.0%
VRTX VERTEX PHARMACEUTICALS INC 1.1%
Value $23.03M Shares 151,500 Est. Cost $103.94 Unrealized +44.8%
MERSANA THERAPEUTICS INC 1.1%
Value $23M Shares 1,330,000 Est. Cost $13.97 Unrealized
JNJ JOHNSON & JOHNSON 1.0%
Value $22.75M Shares 175,000 Est. Cost $93.39 Unrealized +12.4%
TBPH THERAVANCE BIOPHARMA INC 1.0%
Value $22.06M Shares 644,400 Est. Cost $19.99 Unrealized +63.6%
GLPG GALAPAGOS NV 1.0%
Value $21.77M Shares 214,000 Est. Cost $50.00 Unrealized
TMO THERMO FISHER SCIENTIFIC INC 1.0%
Value $20.81M Shares 110,000 Est. Cost $164.09 Unrealized +7.9%
EW EDWARDS LIFESCIENCES CORP 1.0%
Value $20.77M Shares 190,001 Est. Cost $31.99 Unrealized +19.2%
EXAS EXACT SCIENCES CORP 1.0%
Value $20.61M Shares 437,400 Est. Cost $20.61 Unrealized +95.3%
INSM INSMED INC 0.9%
Value $20.29M Shares 650,000 Est. Cost $17.46 Unrealized +9.1%
INCY INCYTE CORP 0.9%
Value $20.2M Shares 173,000 Est. Cost $65.77 Unrealized +92.4%
PRTA PROTHENA CORP PLC 0.9%
Value $20.05M Shares 309,500 Est. Cost $29.28 Unrealized +109.2%
IRTC IRHYTHM TECHNOLOGIES INC 0.9%
Value $20.03M Shares 386,000 Est. Cost $45.28 Unrealized 0.0%
ALMOST FAMILY INC 0.9%
Value $19.44M Shares 362,000 Est. Cost $53.54 Unrealized
DHR DANAHER CORP DEL 0.9%
Value $19.3M Shares 225,000 Est. Cost $68.57 Unrealized +3.7%
MDT MEDTRONIC PLC 0.9%
Value $19.24M Shares 247,364 Est. Cost $67.64 Unrealized -1.0%
CLOVIS ONCOLOGY INC 0.9%
Value $19.08M Shares 231,500 Est. Cost $56.13 Unrealized
COLL COLLEGIUM PHARMACEUTICAL INC 0.9%
Value $18.93M Shares 1,805,000 Est. Cost $15.90 Unrealized -30.6%
BARD C R INC 0.9%
Value $18.43M Shares 57,500 Est. Cost $316.10 Unrealized
JAZZ JAZZ PHARMACEUTICALS PLC 0.8%
Value $18.09M Shares 123,700 Est. Cost $146.27 Unrealized +3.4%
WTW WILLIS TOWERS WATSON PUB LTD 0.8%
Value $17.74M Shares 115,000 Est. Cost $110.38 Unrealized +20.4%
PORTOLA PHARMACEUTICALS INC 0.8%
Value $17.5M Shares 323,800 Est. Cost $54.95 Unrealized
FIBROGEN INC 0.8%
Value $17.48M Shares 325,000 Est. Cost $29.90 Unrealized
WRIGHT MED GROUP N V 0.8%
Value $17.33M Shares 670,000 Est. Cost $23.14 Unrealized
AVEXIS INC 0.8%
Value $16.93M Shares 175,000 Est. Cost $38.23 Unrealized
BIIB BIOGEN INC 0.8%
Value $16.59M Shares 53,000 Est. Cost $273.10 Unrealized +8.4%
AUDENTES THERAPEUTICS INC 0.7%
Value $14.71M Shares 525,000 Est. Cost $18.00 Unrealized
BAX BAXTER INTL INC 0.7%
Value $14.43M Shares 230,000 Est. Cost $49.09 Unrealized +9.0%
AMARIN CORP PLC 0.6%
Value $14M Shares 4,000,000 Est. Cost $3.19 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.6%
Value $13.72M Shares 910,000 Est. Cost $11.11 Unrealized +19.1%
ASSEMBLY BIOSCIENCES INC 0.6%
Value $13.62M Shares 390,000 Est. Cost $12.30 Unrealized
MDGL MADRIGAL PHARMACEUTICALS INC 0.6%
Value $12.37M Shares 275,000 Est. Cost $15.04 Unrealized +24.5%
ALNY ALNYLAM PHARMACEUTICALS INC 0.6%
Value $12.34M Shares 105,000 Est. Cost $63.91 Unrealized +33.6%
HEALTHSOUTH CORP 0.6%
Value $12.28M Shares 265,000 Est. Cost $41.93 Unrealized
INVITAE CORP 0.6%
Value $12.24M Shares 1,306,000 Est. Cost $10.53 Unrealized
KITE PHARMA INC 0.6%
Value $12.23M Shares 68,000 Est. Cost $46.24 Unrealized
SRPT SAREPTA THERAPEUTICS INC 0.5%
Value $11.76M Shares 259,200 Est. Cost $32.85 Unrealized +21.7%
BMRN BIOMARIN PHARMACEUTICAL INC 0.5%
Value $11.63M Shares 125,000 Est. Cost $100.37 Unrealized -12.0%
ALGN ALIGN TECHNOLOGY INC 0.5%
Value $11.42M Shares 61,300 Est. Cost $157.85 Unrealized +8.5%
ACRS ACLARIS THERAPEUTICS INC 0.5%
Value $11.36M Shares 440,000 Est. Cost $19.88 Unrealized +34.8%
PARATEK PHARMACEUTICALS INC 0.5%
Value $11.29M Shares 450,000 Est. Cost $15.77 Unrealized
ARDX ARDELYX INC 0.5%
Value $11.2M Shares 2,000,000 Est. Cost $11.10 Unrealized -52.5%
DERMIRA INC 0.5%
Value $10.8M Shares 400,000 Est. Cost $21.78 Unrealized
INTERSECT ENT INC 0.5%
Value $10.75M Shares 345,000 Est. Cost $25.70 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.5%
Value $10.72M Shares 875,000 Est. Cost $14.84 Unrealized
ASND ASCENDIS PHARMA A S 0.5%
Value $10.15M Shares 280,000 Est. Cost $17.44 Unrealized
JUNO THERAPEUTICS INC 0.5%
Value $10.09M Shares 225,000 Est. Cost $49.81 Unrealized
RETROPHIN INC 0.5%
Value $9.956M Shares 400,000 Est. Cost $23.91 Unrealized
CHINA CORD BLOOD CORP 0.5%
Value $9.786M Shares 880,000 Est. Cost $4.24 Unrealized
ACHILLION PHARMACEUTICALS IN 0.4%
Value $9.57M Shares 2,131,400 Est. Cost $7.72 Unrealized
NEURODERM LTD 0.4%
Value $9.247M Shares 237,700 Est. Cost $28.71 Unrealized
BIOHAVEN PHARMACTL HLDG CO L 0.4%
Value $9.121M Shares 244,000 Est. Cost $25.00 Unrealized
FIVE PRIME THERAPEUTICS INC 0.4%
Value $8.906M Shares 217,700 Est. Cost $28.80 Unrealized
RTI SURGICAL INC 0.4%
Value $8.873M Shares 1,950,000 Est. Cost $4.35 Unrealized
RA PHARMACEUTICALS INC 0.4%
Value $8.76M Shares 600,000 Est. Cost $15.19 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.4%
Value $8.681M Shares 163,000 Est. Cost $61.79 Unrealized -4.1%
CHRS COHERUS BIOSCIENCES INC 0.4%
Value $8.523M Shares 638,400 Est. Cost $22.39 Unrealized -40.9%
THERAPEUTICSMD INC 0.4%
Value $8.464M Shares 1,600,000 Est. Cost $7.12 Unrealized
ZLAB ZAI LAB LTD 0.4%
Value $8.438M Shares 312,500 Est. Cost $27.00 Unrealized
HQY HEALTHEQUITY INC 0.4%
Value $8.346M Shares 165,000 Est. Cost $44.16 Unrealized +5.4%
CLEARSIDE BIOMEDICAL INC 0.4%
Value $8.172M Shares 935,000 Est. Cost $7.01 Unrealized
AXGN AXOGEN INC 0.4%
Value $7.74M Shares 400,000 Est. Cost $13.69 Unrealized +22.7%
AIMMUNE THERAPEUTICS INC 0.3%
Value $7.263M Shares 293,000 Est. Cost $22.58 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.3%
Value $7.166M Shares 875,000 Est. Cost $15.34 Unrealized
REGN REGENERON PHARMACEUTICALS 0.3%
Value $7.154M Shares 16,000 Est. Cost $402.85 Unrealized +17.5%
ACAD ACADIA PHARMACEUTICALS INC 0.3%
Value $6.856M Shares 182,000 Est. Cost $29.92 Unrealized +8.7%
OBSEVA SA 0.3%
Value $6.838M Shares 840,000 Est. Cost $10.41 Unrealized
SEATTLE GENETICS INC 0.3%
Value $6.801M Shares 125,000 Est. Cost $52.27 Unrealized
CRVS CORVUS PHARMACEUTICALS INC 0.3%
Value $6.736M Shares 422,600 Est. Cost $14.35 Unrealized -3.6%
1741046D STERIS PLC 0.3%
Value $6.542M Shares 74,000 Est. Cost $69.98 Unrealized
TETRAPHASE PHARMACEUTICALS I 0.3%
Value $6.498M Shares 950,000 Est. Cost $6.12 Unrealized
BLUEPRINT MEDICINES CORP 0.3%
Value $6.026M Shares 86,500 Est. Cost $69.66 Unrealized
G1 THERAPEUTICS INC 0.3%
Value $5.974M Shares 240,000 Est. Cost $17.44 Unrealized
CLEMENTIA PHARMACEUTICALS IN 0.3%
Value $5.827M Shares 345,000 Est. Cost $16.89 Unrealized
ARENA PHARMACEUTICALS INC 0.3%
Value $5.483M Shares 215,000 Est. Cost $25.50 Unrealized
MERUS N V 0.3%
Value $5.464M Shares 275,000 Est. Cost $9.33 Unrealized
MEDICINES CO 0.2%
Value $5.281M Shares 5,000,000 Est. Cost $1.05 Unrealized
ANAB ANAPTYSBIO INC 0.2%
Value $5.243M Shares 150,000 Est. Cost $26.97 Unrealized 0.0%
NABRIVA THERAPEUTICS PLC 0.2%
Value $5.119M Shares 625,000 Est. Cost $10.11 Unrealized
BLUEBIRD BIO INC 0.2%
Value $4.807M Shares 35,000 Est. Cost $108.33 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.2%
Value $4.658M Shares 150,000 Est. Cost $34.94 Unrealized
MYOVANT SCIENCES LTD 0.2%
Value $4.565M Shares 295,100 Est. Cost $13.79 Unrealized
ADURO BIOTECH INC 0.2%
Value $4.42M Shares 415,000 Est. Cost $28.61 Unrealized
EXEL EXELIXIS INC 0.2%
Value $4.24M Shares 175,000 Est. Cost $11.85 Unrealized +124.7%
MGNX MACROGENICS INC 0.2%
Value $4.158M Shares 225,000 Est. Cost $32.43 Unrealized -46.6%
EGALET CORP 0.2%
Value $4.051M Shares 7,800,000 Est. Cost $0.76 Unrealized
MEDICINES CO 0.2%
Value $3.801M Shares 3,000,000 Est. Cost $1.14 Unrealized
AGN 5.5 03/01/18 A ALLERGAN PLC 0.2%
Value $3.789M Shares 5,000 Est. Cost $1045.60 Unrealized
CYMABAY THERAPEUTICS INC 0.2%
Value $3.627M Shares 450,000 Est. Cost $8.06 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.2%
Value $3.548M Shares 165,000 Est. Cost $24.06 Unrealized
SERES THERAPEUTICS INC 0.2%
Value $3.529M Shares 220,000 Est. Cost $38.95 Unrealized
ZOGENIX INC 0.2%
Value $3.505M Shares 100,000 Est. Cost $35.05 Unrealized
BMY BRISTOL MYERS SQUIBB CO 0.1%
Value $3.187M Shares 50,000 Est. Cost $42.96 Unrealized +0.4%
IRWD IRONWOOD PHARMACEUTICALS INC 0.1%
Value $3.154M Shares 200,000 Est. Cost $13.76 Unrealized 0.0%
CGEN COMPUGEN LTD 0.1%
Value $3.135M Shares 825,000 Est. Cost $6.07 Unrealized -42.8%
DBV TECHNOLOGIES S A 0.1%
Value $3.098M Shares 73,000 Est. Cost $33.59 Unrealized
INTRA CELLULAR THERAPIES INC 0.1%
Value $2.959M Shares 187,500 Est. Cost $39.54 Unrealized
AEGLEA BIOTHERAPEUTICS INC 0.1%
Value $2.584M Shares 524,089 Est. Cost $4.86 Unrealized
CARDIOME PHARMA CORP 0.1%
Value $2.568M Shares 1,200,000 Est. Cost $8.88 Unrealized
RIGEL PHARMACEUTICALS INC 0.1%
Value $2.54M Shares 1,000,000 Est. Cost $2.73 Unrealized
ZBH ZIMMER BIOMET HLDGS INC 0.1%
Value $2.471M Shares 21,100 Est. Cost $99.44 Unrealized +8.4%
CIDARA THERAPEUTICS INC 0.1%
Value $2.43M Shares 300,000 Est. Cost $13.32 Unrealized
ATYR PHARMA INC 0.1%
Value $2.399M Shares 475,000 Est. Cost $16.05 Unrealized
BCRX BIOCRYST PHARMACEUTICALS 0.1%
Value $2.358M Shares 450,000 Est. Cost $5.12 Unrealized 0.0%
SAGE THERAPEUTICS INC 0.1%
Value $2.025M Shares 32,500 Est. Cost $62.31 Unrealized
THERAVANCE BIOPHARMA INC 0.1%
Value $1.844M Shares 1,500,000 Est. Cost $1.14 Unrealized
SCYNEXIS INC 0.1%
Value $1.832M Shares 760,000 Est. Cost $6.72 Unrealized
ALPINE IMMUNE SCIENCES INC 0.1%
Value $1.74M Shares 150,000 Est. Cost $11.60 Unrealized
MYOKARDIA INC 0.1%
Value $1.714M Shares 40,000 Est. Cost $42.85 Unrealized
RADIUS HEALTH INC 0.1%
Value $1.509M Shares 1,500,000 Est. Cost $1.01 Unrealized
DIMENSION THERAPEUTICS INC 0.1%
Value $1.35M Shares 225,000 Est. Cost $11.28 Unrealized
CHIASMA INC 0.1%
Value $1.256M Shares 492,500 Est. Cost $19.77 Unrealized
WRIGHT MED GROUP INC 0.1%
Value $1.086M Shares 1,000,000 Est. Cost $0.90 Unrealized
PROTEOSTASIS THERAPEUTICS IN 0.0%
Value $945K Shares 450,000 Est. Cost $10.10 Unrealized
NOVAVAX INC 0.0%
Value $935K Shares 820,000 Est. Cost $5.52 Unrealized
NEWLINK GENETICS CORP 0.0%
Value $738K Shares 72,500 Est. Cost $22.84 Unrealized
KALA PHARMACEUTICALS INC 0.0%
Value $571K Shares 25,000 Est. Cost $22.84 Unrealized
TANDEM DIABETES CARE INC 0.0%
Value $411K Shares 562,500 Est. Cost $13.40 Unrealized
EGALET CORP 0.0%
Value $384K Shares 300,000 Est. Cost $13.18 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.0%
Value $359K Shares 270,000 Est. Cost $11.28 Unrealized -89.0%
OREXIGEN THERAPEUTICS INC 0.0%
Value $350K Shares 165,300 Est. Cost $3.32 Unrealized
DARE BIOSCIENCE INC 0.0%
Value $195K Shares 62,500 Est. Cost $3.12 Unrealized
ANTH ANTHERA PHARMACEUTICALS INC 0.0%
Value $155K Shares 107,630 Est. Cost $2.24 Unrealized -36.6%