Rock Springs Capital Management LP Diversified Active

CIK: 0001595725 · Show all filings

Period: Q1 2016 (← Previous) (Next →)

Filing Date: May 16, 2016

Total Value ($000): $1,193,502 (99.6% shares, 0.4% debt)

Holdings (128)

AETNA INC NEW 3.9%
Value ($000) $46,176 Shares 411,000 Est. Cost $100.59 Unrealized
ALLERGAN PLC 3.8%
Value ($000) $45,833 Shares 171,000 Est. Cost $302.66 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 3.5%
Value ($000) $41,305 Shares 749,500 Est. Cost $64.07 Unrealized -10.9%
HCA HCA HOLDINGS INC 2.8%
Value ($000) $33,562 Shares 430,000 Est. Cost $62.20 Unrealized +4.4%
BAXALTA INC 2.7%
Value ($000) $32,724 Shares 810,000 Est. Cost $39.03 Unrealized
ALEXION PHARMACEUTICALS INC 2.7%
Value ($000) $31,707 Shares 227,750 Est. Cost $158.58 Unrealized
PFE PFIZER INC 2.6%
Value ($000) $30,775 Shares 1,038,300 Est. Cost $20.07 Unrealized -6.9%
GILD GILEAD SCIENCES INC 2.5%
Value ($000) $30,341 Shares 330,300 Est. Cost $55.32 Unrealized +14.7%
ADVANCED ACCELERATOR APPLIC 2.4%
Value ($000) $29,172 Shares 833,000 Est. Cost $31.42 Unrealized
RADIUS HEALTH INC 2.1%
Value ($000) $25,419 Shares 808,500 Est. Cost $45.08 Unrealized
ISRG INTUITIVE SURGICAL INC 2.1%
Value ($000) $25,244 Shares 42,000 Est. Cost $50.54 Unrealized +22.6%
CELGENE CORP 2.0%
Value ($000) $23,972 Shares 239,500 Est. Cost $119.65 Unrealized
WELLCARE HEALTH PLANS INC 1.8%
Value ($000) $21,333 Shares 230,000 Est. Cost $79.19 Unrealized
TEVA TEVA PHARMACEUTICAL INDS LTD 1.8%
Value ($000) $21,136 Shares 395,000 Est. Cost $57.61 Unrealized
COLL COLLEGIUM PHARMACEUTICAL INC 1.7%
Value ($000) $20,782 Shares 1,145,000 Est. Cost $17.59 Unrealized +3.4%
MEDICINES CO 1.7%
Value ($000) $20,079 Shares 632,000 Est. Cost $32.92 Unrealized
LLY LILLY ELI & CO 1.7%
Value ($000) $19,875 Shares 276,000 Est. Cost $60.42 Unrealized +5.9%
PCRX PACIRA PHARMACEUTICALS INC 1.4%
Value ($000) $17,298 Shares 326,500 Est. Cost $66.56 Unrealized -12.1%
SPARK THERAPEUTICS INC 1.4%
Value ($000) $17,131 Shares 580,500 Est. Cost $58.61 Unrealized
ACRS ACLARIS THERAPEUTICS INC 1.4%
Value ($000) $16,970 Shares 895,500 Est. Cost $19.34 Unrealized -1.2%
ELV ANTHEM INC 1.4%
Value ($000) $16,818 Shares 121,000 Est. Cost $130.29 Unrealized -10.6%
CIGNA CORPORATION 1.4%
Value ($000) $16,743 Shares 122,000 Est. Cost $102.49 Unrealized
TESARO INC 1.4%
Value ($000) $16,709 Shares 379,500 Est. Cost $40.25 Unrealized
NBIX NEUROCRINE BIOSCIENCES INC 1.3%
Value ($000) $15,998 Shares 404,500 Est. Cost $19.41 Unrealized +104.4%
TMO THERMO FISHER SCIENTIFIC INC 1.2%
Value ($000) $14,187 Shares 100,200 Est. Cost $124.72 Unrealized +4.4%
AMGN AMGEN INC 1.2%
Value ($000) $14,093 Shares 94,000 Est. Cost $91.69 Unrealized +20.8%
BIIB BIOGEN INC 1.2%
Value ($000) $13,836 Shares 53,150 Est. Cost $274.69 Unrealized -3.8%
PRTA PROTHENA CORP PLC 1.1%
Value ($000) $12,677 Shares 308,000 Est. Cost $29.28 Unrealized +33.6%
MD MEDNAX INC 1.1%
Value ($000) $12,601 Shares 195,000 Est. Cost $78.20 Unrealized -15.2%
TBPH THERAVANCE BIOPHARMA INC 1.0%
Value ($000) $12,229 Shares 650,500 Est. Cost $18.85 Unrealized -13.2%
MCK MCKESSON CORP 1.0%
Value ($000) $12,187 Shares 77,500 Est. Cost $158.21 Unrealized -5.5%
JAZZ JAZZ PHARMACEUTICALS PLC 0.9%
Value ($000) $11,162 Shares 85,500 Est. Cost $153.53 Unrealized -18.9%
BMY BRISTOL MYERS SQUIBB CO 0.9%
Value ($000) $10,860 Shares 170,000 Est. Cost $44.80 Unrealized 0.0%
PRA HEALTH SCIENCES INC 0.9%
Value ($000) $10,818 Shares 253,000 Est. Cost $24.22 Unrealized
GW PHARMACEUTICALS PLC 0.9%
Value ($000) $10,606 Shares 147,000 Est. Cost $78.88 Unrealized
PEN PENUMBRA INC 0.9%
Value ($000) $10,511 Shares 228,500 Est. Cost $41.31 Unrealized +13.1%
WALGREENS BOOTS ALLIANCE INC 0.9%
Value ($000) $10,404 Shares 123,500 Est. Cost $84.24 Unrealized
THERAPEUTICSMD INC 0.8%
Value ($000) $10,080 Shares 1,575,000 Est. Cost $7.17 Unrealized
ANACOR PHARMACEUTICALS INC 0.8%
Value ($000) $9,487 Shares 177,500 Est. Cost $81.32 Unrealized
INCY INCYTE CORP 0.8%
Value ($000) $9,457 Shares 130,500 Est. Cost $58.67 Unrealized +27.0%
ACHILLION PHARMACEUTICALS IN 0.8%
Value ($000) $9,418 Shares 1,220,000 Est. Cost $9.90 Unrealized
GLPG GALAPAGOS NV 0.7%
Value ($000) $8,782 Shares 210,000 Est. Cost $48.55 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.7%
Value ($000) $8,516 Shares 103,250 Est. Cost $102.54 Unrealized -20.7%
ARDX ARDELYX INC 0.7%
Value ($000) $8,239 Shares 1,060,400 Est. Cost $12.03 Unrealized -18.2%
WRIGHT MED GROUP N V 0.7%
Value ($000) $8,134 Shares 490,000 Est. Cost $23.65 Unrealized
INOVALON HLDGS INC 0.7%
Value ($000) $7,914 Shares 427,300 Est. Cost $27.87 Unrealized
HEALTHSOUTH CORP 0.7%
Value ($000) $7,827 Shares 208,000 Est. Cost $42.78 Unrealized
INVITAE CORP 0.6%
Value ($000) $7,698 Shares 752,500 Est. Cost $12.27 Unrealized
JUNO THERAPEUTICS INC 0.6%
Value ($000) $7,504 Shares 197,001 Est. Cost $52.64 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.6%
Value ($000) $7,502 Shares 118,500 Est. Cost $60.20 Unrealized +8.7%
RTI SURGICAL INC 0.6%
Value ($000) $7,440 Shares 1,860,000 Est. Cost $4.28 Unrealized
COOPER COS INC 0.6%
Value ($000) $7,329 Shares 47,600 Est. Cost $138.54 Unrealized
EPIZYME INC 0.6%
Value ($000) $7,139 Shares 589,000 Est. Cost $17.85 Unrealized
RETROPHIN INC 0.6%
Value ($000) $7,122 Shares 521,400 Est. Cost $23.91 Unrealized
SERES THERAPEUTICS INC 0.6%
Value ($000) $6,959 Shares 262,000 Est. Cost $38.95 Unrealized
EW EDWARDS LIFESCIENCES CORP 0.6%
Value ($000) $6,704 Shares 76,000 Est. Cost $27.59 Unrealized 0.0%
VRTX VERTEX PHARMACEUTICALS INC 0.6%
Value ($000) $6,669 Shares 83,900 Est. Cost $84.88 Unrealized +6.6%
ALKS ALKERMES PLC 0.6%
Value ($000) $6,650 Shares 194,500 Est. Cost $39.49 Unrealized 0.0%
CRVS CORVUS PHARMACEUTICALS INC 0.6%
Value ($000) $6,625 Shares 456,887 Est. Cost $14.35 Unrealized 0.0%
ONC BEIGENE LTD 0.6%
Value ($000) $6,595 Shares 225,000 Est. Cost $29.31 Unrealized
INTERSECT ENT INC 0.5%
Value ($000) $6,460 Shares 340,000 Est. Cost $25.85 Unrealized
ATHENAHEALTH INC 0.5%
Value ($000) $6,349 Shares 45,750 Est. Cost $119.41 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.5%
Value ($000) $6,219 Shares 765,001 Est. Cost $18.26 Unrealized
NOVADAQ TECHNOLOGIES INC 0.5%
Value ($000) $6,155 Shares 555,000 Est. Cost $14.29 Unrealized
HEARTWARE INTL INC 0.5%
Value ($000) $6,064 Shares 193,000 Est. Cost $62.42 Unrealized
DERMIRA INC 0.5%
Value ($000) $5,997 Shares 290,000 Est. Cost $18.60 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.5%
Value ($000) $5,987 Shares 282,000 Est. Cost $21.12 Unrealized -22.4%
REGN REGENERON PHARMACEUTICALS 0.5%
Value ($000) $5,947 Shares 16,500 Est. Cost $404.91 Unrealized +1.2%
FIVE PRIME THERAPEUTICS INC 0.5%
Value ($000) $5,871 Shares 144,500 Est. Cost $23.84 Unrealized
INSYS THERAPEUTICS INC NEW 0.5%
Value ($000) $5,844 Shares 365,500 Est. Cost $30.55 Unrealized
INSM INSMED INC 0.5%
Value ($000) $5,702 Shares 450,000 Est. Cost $17.44 Unrealized -24.6%
ENVISION HEALTHCARE HLDGS IN 0.5%
Value ($000) $5,426 Shares 266,000 Est. Cost $34.93 Unrealized
CHINA CORD BLOOD CORP 0.4%
Value ($000) $5,342 Shares 880,000 Est. Cost $4.24 Unrealized
ADURO BIOTECH INC 0.4%
Value ($000) $5,316 Shares 415,000 Est. Cost $28.61 Unrealized
INTRA CELLULAR THERAPIES INC 0.4%
Value ($000) $5,213 Shares 187,500 Est. Cost $39.55 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.4%
Value ($000) $5,184 Shares 613,500 Est. Cost $11.56 Unrealized -38.7%
ASND ASCENDIS PHARMA A S 0.4%
Value ($000) $5,009 Shares 270,000 Est. Cost $17.64 Unrealized
XENOPORT INC 0.4%
Value ($000) $4,961 Shares 1,100,000 Est. Cost $5.44 Unrealized
TANDEM DIABETES CARE INC 0.4%
Value ($000) $4,899 Shares 562,500 Est. Cost $13.74 Unrealized
CARDIOME PHARMA CORP 0.4%
Value ($000) $4,867 Shares 1,190,000 Est. Cost $8.88 Unrealized
AGN 5.5 03/01/18 A ALLERGAN PLC 0.4%
Value ($000) $4,585 Shares 5,000 Est. Cost $1045.60 Unrealized
CGEN COMPUGEN LTD 0.4%
Value ($000) $4,576 Shares 820,000 Est. Cost $6.07 Unrealized -13.9%
PROTEOSTASIS THERAPEUTICS IN 0.4%
Value ($000) $4,531 Shares 470,000 Est. Cost $9.64 Unrealized
CHIASMA INC 0.4%
Value ($000) $4,511 Shares 492,500 Est. Cost $19.77 Unrealized
NOVAVAX INC 0.4%
Value ($000) $4,399 Shares 852,500 Est. Cost $5.52 Unrealized
FIBROGEN INC 0.4%
Value ($000) $4,343 Shares 204,000 Est. Cost $26.20 Unrealized
MGNX MACROGENICS INC 0.4%
Value ($000) $4,219 Shares 225,000 Est. Cost $32.43 Unrealized -41.3%
AIMMUNE THERAPEUTICS INC 0.3%
Value ($000) $3,973 Shares 293,000 Est. Cost $22.58 Unrealized
AVEXIS INC 0.3%
Value ($000) $3,889 Shares 142,758 Est. Cost $27.24 Unrealized
PRGO PERRIGO CO PLC 0.3%
Value ($000) $3,838 Shares 30,000 Est. Cost $153.80 Unrealized -11.1%
GENOCEA BIOSCIENCES INC 0.3%
Value ($000) $3,715 Shares 480,000 Est. Cost $6.85 Unrealized
KITE PHARMA INC 0.3%
Value ($000) $3,673 Shares 80,000 Est. Cost $46.24 Unrealized
OTONOMY INC 0.3%
Value ($000) $3,581 Shares 240,000 Est. Cost $21.56 Unrealized
PORTOLA PHARMACEUTICALS INC 0.3%
Value ($000) $3,570 Shares 175,000 Est. Cost $49.67 Unrealized
MEDICINES CO 0.3%
Value ($000) $3,405 Shares 3,000,000 Est. Cost $1.14 Unrealized
NABRIVA THERAPEUTICS AG 0.3%
Value ($000) $3,405 Shares 380,000 Est. Cost $9.29 Unrealized
PARATEK PHARMACEUTICALS INC 0.3%
Value ($000) $3,383 Shares 223,000 Est. Cost $15.70 Unrealized
CIDARA THERAPEUTICS INC 0.3%
Value ($000) $3,175 Shares 250,000 Est. Cost $13.90 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.3%
Value ($000) $3,175 Shares 165,000 Est. Cost $24.06 Unrealized
NVCR NOVOCURE LTD 0.3%
Value ($000) $3,103 Shares 214,316 Est. Cost $23.86 Unrealized -39.8%
ENDOCHOICE HLDGS INC 0.3%
Value ($000) $3,074 Shares 590,000 Est. Cost $16.16 Unrealized
RIGEL PHARMACEUTICALS INC 0.3%
Value ($000) $3,045 Shares 1,464,050 Est. Cost $2.79 Unrealized
AURIS MED HLDG AG 0.2%
Value ($000) $2,867 Shares 787,600 Est. Cost $3.64 Unrealized
SCYNEXIS INC 0.2%
Value ($000) $2,559 Shares 635,000 Est. Cost $7.42 Unrealized
SRPT SAREPTA THERAPEUTICS INC 0.2%
Value ($000) $2,557 Shares 131,000 Est. Cost $29.74 Unrealized -41.3%
CLOVIS ONCOLOGY INC 0.2%
Value ($000) $2,400 Shares 125,000 Est. Cost $35.00 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.2%
Value ($000) $2,388 Shares 97,500 Est. Cost $24.49 Unrealized
DBV TECHNOLOGIES S A 0.2%
Value ($000) $2,376 Shares 73,000 Est. Cost $33.59 Unrealized
VALEANT PHARMACEUTICALS INTL 0.2%
Value ($000) $2,249 Shares 85,500 Est. Cost $174.16 Unrealized
OPHTHOTECH CORP 0.2%
Value ($000) $2,177 Shares 51,500 Est. Cost $42.27 Unrealized
DIMENSION THERAPEUTICS INC 0.2%
Value ($000) $2,125 Shares 271,370 Est. Cost $11.28 Unrealized
EGALET CORP 0.2%
Value ($000) $2,058 Shares 300,000 Est. Cost $13.18 Unrealized
NIVALIS THERAPEUTICS INC 0.2%
Value ($000) $2,039 Shares 489,000 Est. Cost $15.15 Unrealized
ASSEMBLY BIOSCIENCES INC 0.2%
Value ($000) $1,958 Shares 390,000 Est. Cost $12.30 Unrealized
TETRAPHASE PHARMACEUTICALS I 0.2%
Value ($000) $1,852 Shares 400,000 Est. Cost $7.33 Unrealized
ATYR PHARMA INC 0.1%
Value ($000) $1,708 Shares 433,496 Est. Cost $17.38 Unrealized
CERULEAN PHARMA INC 0.1%
Value ($000) $1,694 Shares 625,000 Est. Cost $5.94 Unrealized
ANTHERA PHARMACEUTICALS INC 0.1%
Value ($000) $1,629 Shares 450,000 Est. Cost $4.67 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.1%
Value ($000) $1,423 Shares 270,000 Est. Cost $11.28 Unrealized -45.8%
INTERCEPT PHARMACEUTICALS IN 0.1%
Value ($000) $1,285 Shares 10,000 Est. Cost $197.65 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.1%
Value ($000) $1,237 Shares 78,000 Est. Cost $38.31 Unrealized
OREXIGEN THERAPEUTICS INC 0.1%
Value ($000) $930 Shares 1,653,000 Est. Cost $5.43 Unrealized
PBYI PUMA BIOTECHNOLOGY INC 0.1%
Value ($000) $925 Shares 31,500 Est. Cost $89.73 Unrealized -49.6%
SOPHIRIS BIO INC 0.1%
Value ($000) $905 Shares 628,563 Est. Cost $1.81 Unrealized
WRIGHT MED GROUP INC 0.1%
Value ($000) $898 Shares 1,000,000 Est. Cost $0.90 Unrealized
BLUEBIRD BIO INC 0.1%
Value ($000) $850 Shares 20,000 Est. Cost $125.79 Unrealized
PORTOLA PHARMACEUTICALS INC 0.1%
Value ($000) $714 Shares 35,000 Est. Cost $49.67 Unrealized
MIRNA THERAPEUTICS INC 0.1%
Value ($000) $656 Shares 150,000 Est. Cost $6.25 Unrealized