Rock Springs Capital Management LP Diversified Active

Location: Baltimore, MD

CIK: 0001595725 · Show all filings

Period: Q1 2016 (← Previous) (Next →)

Filing Date: May 16, 2016

Total Value: $1.194B (99.6% shares, 0.4% debt)

Holdings (128)

AETNA INC NEW 3.9%
Value $46.18M Shares 411,000 Est. Cost $100.59 Unrealized
ALLERGAN PLC 3.8%
Value $45.83M Shares 171,000 Est. Cost $302.66 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 3.5%
Value $41.3M Shares 749,500 Est. Cost $64.07 Unrealized -10.9%
HCA HCA HOLDINGS INC 2.8%
Value $33.56M Shares 430,000 Est. Cost $62.20 Unrealized +4.4%
BAXALTA INC 2.7%
Value $32.72M Shares 810,000 Est. Cost $39.03 Unrealized
ALEXION PHARMACEUTICALS INC 2.7%
Value $31.71M Shares 227,750 Est. Cost $158.58 Unrealized
PFE PFIZER INC 2.6%
Value $30.77M Shares 1,038,300 Est. Cost $20.07 Unrealized -6.9%
GILD GILEAD SCIENCES INC 2.5%
Value $30.34M Shares 330,300 Est. Cost $55.32 Unrealized +14.7%
ADVANCED ACCELERATOR APPLIC 2.4%
Value $29.17M Shares 833,000 Est. Cost $31.42 Unrealized
RADIUS HEALTH INC 2.1%
Value $25.42M Shares 808,500 Est. Cost $45.08 Unrealized
ISRG INTUITIVE SURGICAL INC 2.1%
Value $25.24M Shares 42,000 Est. Cost $50.54 Unrealized +22.6%
CELGENE CORP 2.0%
Value $23.97M Shares 239,500 Est. Cost $119.65 Unrealized
WELLCARE HEALTH PLANS INC 1.8%
Value $21.33M Shares 230,000 Est. Cost $79.19 Unrealized
TEVA TEVA PHARMACEUTICAL INDS LTD 1.8%
Value $21.14M Shares 395,000 Est. Cost $57.61 Unrealized
COLL COLLEGIUM PHARMACEUTICAL INC 1.7%
Value $20.78M Shares 1,145,000 Est. Cost $17.59 Unrealized +3.4%
MEDICINES CO 1.7%
Value $20.08M Shares 632,000 Est. Cost $32.92 Unrealized
LLY LILLY ELI & CO 1.7%
Value $19.88M Shares 276,000 Est. Cost $60.42 Unrealized +5.9%
PCRX PACIRA PHARMACEUTICALS INC 1.4%
Value $17.3M Shares 326,500 Est. Cost $66.56 Unrealized -12.1%
SPARK THERAPEUTICS INC 1.4%
Value $17.13M Shares 580,500 Est. Cost $58.61 Unrealized
ACRS ACLARIS THERAPEUTICS INC 1.4%
Value $16.97M Shares 895,500 Est. Cost $19.34 Unrealized -1.2%
ELV ANTHEM INC 1.4%
Value $16.82M Shares 121,000 Est. Cost $130.29 Unrealized -10.6%
CIGNA CORPORATION 1.4%
Value $16.74M Shares 122,000 Est. Cost $102.49 Unrealized
TESARO INC 1.4%
Value $16.71M Shares 379,500 Est. Cost $40.25 Unrealized
NBIX NEUROCRINE BIOSCIENCES INC 1.3%
Value $16M Shares 404,500 Est. Cost $19.41 Unrealized +104.4%
TMO THERMO FISHER SCIENTIFIC INC 1.2%
Value $14.19M Shares 100,200 Est. Cost $124.72 Unrealized +4.4%
AMGN AMGEN INC 1.2%
Value $14.09M Shares 94,000 Est. Cost $91.69 Unrealized +20.8%
BIIB BIOGEN INC 1.2%
Value $13.84M Shares 53,150 Est. Cost $274.69 Unrealized -3.8%
PRTA PROTHENA CORP PLC 1.1%
Value $12.68M Shares 308,000 Est. Cost $29.28 Unrealized +33.6%
MD MEDNAX INC 1.1%
Value $12.6M Shares 195,000 Est. Cost $78.20 Unrealized -15.2%
TBPH THERAVANCE BIOPHARMA INC 1.0%
Value $12.23M Shares 650,500 Est. Cost $18.85 Unrealized -13.2%
MCK MCKESSON CORP 1.0%
Value $12.19M Shares 77,500 Est. Cost $158.21 Unrealized -5.5%
JAZZ JAZZ PHARMACEUTICALS PLC 0.9%
Value $11.16M Shares 85,500 Est. Cost $153.53 Unrealized -18.9%
BMY BRISTOL MYERS SQUIBB CO 0.9%
Value $10.86M Shares 170,000 Est. Cost $44.80 Unrealized 0.0%
PRA HEALTH SCIENCES INC 0.9%
Value $10.82M Shares 253,000 Est. Cost $24.22 Unrealized
GW PHARMACEUTICALS PLC 0.9%
Value $10.61M Shares 147,000 Est. Cost $78.88 Unrealized
PEN PENUMBRA INC 0.9%
Value $10.51M Shares 228,500 Est. Cost $41.31 Unrealized +13.1%
WALGREENS BOOTS ALLIANCE INC 0.9%
Value $10.4M Shares 123,500 Est. Cost $84.24 Unrealized
THERAPEUTICSMD INC 0.8%
Value $10.08M Shares 1,575,000 Est. Cost $7.17 Unrealized
ANACOR PHARMACEUTICALS INC 0.8%
Value $9.487M Shares 177,500 Est. Cost $81.32 Unrealized
INCY INCYTE CORP 0.8%
Value $9.457M Shares 130,500 Est. Cost $58.67 Unrealized +27.0%
ACHILLION PHARMACEUTICALS IN 0.8%
Value $9.418M Shares 1,220,000 Est. Cost $9.90 Unrealized
GLPG GALAPAGOS NV 0.7%
Value $8.782M Shares 210,000 Est. Cost $48.55 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.7%
Value $8.516M Shares 103,250 Est. Cost $102.54 Unrealized -20.7%
ARDX ARDELYX INC 0.7%
Value $8.239M Shares 1,060,400 Est. Cost $12.03 Unrealized -18.2%
WRIGHT MED GROUP N V 0.7%
Value $8.134M Shares 490,000 Est. Cost $23.65 Unrealized
INOVALON HLDGS INC 0.7%
Value $7.914M Shares 427,300 Est. Cost $27.87 Unrealized
HEALTHSOUTH CORP 0.7%
Value $7.827M Shares 208,000 Est. Cost $42.78 Unrealized
INVITAE CORP 0.6%
Value $7.698M Shares 752,500 Est. Cost $12.27 Unrealized
JUNO THERAPEUTICS INC 0.6%
Value $7.504M Shares 197,001 Est. Cost $52.64 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.6%
Value $7.502M Shares 118,500 Est. Cost $60.20 Unrealized +8.7%
RTI SURGICAL INC 0.6%
Value $7.44M Shares 1,860,000 Est. Cost $4.28 Unrealized
COOPER COS INC 0.6%
Value $7.329M Shares 47,600 Est. Cost $138.54 Unrealized
EPIZYME INC 0.6%
Value $7.139M Shares 589,000 Est. Cost $17.85 Unrealized
RETROPHIN INC 0.6%
Value $7.122M Shares 521,400 Est. Cost $23.91 Unrealized
SERES THERAPEUTICS INC 0.6%
Value $6.959M Shares 262,000 Est. Cost $38.95 Unrealized
EW EDWARDS LIFESCIENCES CORP 0.6%
Value $6.704M Shares 76,000 Est. Cost $27.59 Unrealized 0.0%
VRTX VERTEX PHARMACEUTICALS INC 0.6%
Value $6.669M Shares 83,900 Est. Cost $84.88 Unrealized +6.6%
ALKS ALKERMES PLC 0.6%
Value $6.65M Shares 194,500 Est. Cost $39.49 Unrealized 0.0%
CRVS CORVUS PHARMACEUTICALS INC 0.6%
Value $6.625M Shares 456,887 Est. Cost $14.35 Unrealized 0.0%
ONC BEIGENE LTD 0.6%
Value $6.595M Shares 225,000 Est. Cost $29.31 Unrealized
INTERSECT ENT INC 0.5%
Value $6.46M Shares 340,000 Est. Cost $25.85 Unrealized
ATHENAHEALTH INC 0.5%
Value $6.349M Shares 45,750 Est. Cost $119.41 Unrealized
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.5%
Value $6.219M Shares 765,001 Est. Cost $18.26 Unrealized
NOVADAQ TECHNOLOGIES INC 0.5%
Value $6.155M Shares 555,000 Est. Cost $14.29 Unrealized
HEARTWARE INTL INC 0.5%
Value $6.064M Shares 193,000 Est. Cost $62.42 Unrealized
DERMIRA INC 0.5%
Value $5.997M Shares 290,000 Est. Cost $18.60 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.5%
Value $5.987M Shares 282,000 Est. Cost $21.12 Unrealized -22.4%
REGN REGENERON PHARMACEUTICALS 0.5%
Value $5.947M Shares 16,500 Est. Cost $404.91 Unrealized +1.2%
FIVE PRIME THERAPEUTICS INC 0.5%
Value $5.871M Shares 144,500 Est. Cost $23.84 Unrealized
INSYS THERAPEUTICS INC NEW 0.5%
Value $5.844M Shares 365,500 Est. Cost $30.55 Unrealized
INSM INSMED INC 0.5%
Value $5.702M Shares 450,000 Est. Cost $17.44 Unrealized -24.6%
ENVISION HEALTHCARE HLDGS IN 0.5%
Value $5.426M Shares 266,000 Est. Cost $34.93 Unrealized
CHINA CORD BLOOD CORP 0.4%
Value $5.342M Shares 880,000 Est. Cost $4.24 Unrealized
ADURO BIOTECH INC 0.4%
Value $5.316M Shares 415,000 Est. Cost $28.61 Unrealized
INTRA CELLULAR THERAPIES INC 0.4%
Value $5.213M Shares 187,500 Est. Cost $39.55 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.4%
Value $5.184M Shares 613,500 Est. Cost $11.56 Unrealized -38.7%
ASND ASCENDIS PHARMA A S 0.4%
Value $5.009M Shares 270,000 Est. Cost $17.64 Unrealized
XENOPORT INC 0.4%
Value $4.961M Shares 1,100,000 Est. Cost $5.44 Unrealized
TANDEM DIABETES CARE INC 0.4%
Value $4.899M Shares 562,500 Est. Cost $13.74 Unrealized
CARDIOME PHARMA CORP 0.4%
Value $4.867M Shares 1,190,000 Est. Cost $8.88 Unrealized
AGN 5.5 03/01/18 A ALLERGAN PLC 0.4%
Value $4.585M Shares 5,000 Est. Cost $1045.60 Unrealized
CGEN COMPUGEN LTD 0.4%
Value $4.576M Shares 820,000 Est. Cost $6.07 Unrealized -13.9%
PROTEOSTASIS THERAPEUTICS IN 0.4%
Value $4.531M Shares 470,000 Est. Cost $9.64 Unrealized
CHIASMA INC 0.4%
Value $4.511M Shares 492,500 Est. Cost $19.77 Unrealized
NOVAVAX INC 0.4%
Value $4.399M Shares 852,500 Est. Cost $5.52 Unrealized
FIBROGEN INC 0.4%
Value $4.343M Shares 204,000 Est. Cost $26.20 Unrealized
MGNX MACROGENICS INC 0.4%
Value $4.219M Shares 225,000 Est. Cost $32.43 Unrealized -41.3%
AIMMUNE THERAPEUTICS INC 0.3%
Value $3.973M Shares 293,000 Est. Cost $22.58 Unrealized
AVEXIS INC 0.3%
Value $3.889M Shares 142,758 Est. Cost $27.24 Unrealized
PRGO PERRIGO CO PLC 0.3%
Value $3.838M Shares 30,000 Est. Cost $153.80 Unrealized -11.1%
GENOCEA BIOSCIENCES INC 0.3%
Value $3.715M Shares 480,000 Est. Cost $6.85 Unrealized
KITE PHARMA INC 0.3%
Value $3.673M Shares 80,000 Est. Cost $46.24 Unrealized
OTONOMY INC 0.3%
Value $3.581M Shares 240,000 Est. Cost $21.56 Unrealized
PORTOLA PHARMACEUTICALS INC 0.3%
Value $3.57M Shares 175,000 Est. Cost $49.67 Unrealized
MEDICINES CO 0.3%
Value $3.405M Shares 3,000,000 Est. Cost $1.14 Unrealized
NABRIVA THERAPEUTICS AG 0.3%
Value $3.405M Shares 380,000 Est. Cost $9.29 Unrealized
PARATEK PHARMACEUTICALS INC 0.3%
Value $3.383M Shares 223,000 Est. Cost $15.70 Unrealized
CIDARA THERAPEUTICS INC 0.3%
Value $3.175M Shares 250,000 Est. Cost $13.90 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.3%
Value $3.175M Shares 165,000 Est. Cost $24.06 Unrealized
NVCR NOVOCURE LTD 0.3%
Value $3.103M Shares 214,316 Est. Cost $23.86 Unrealized -39.8%
ENDOCHOICE HLDGS INC 0.3%
Value $3.074M Shares 590,000 Est. Cost $16.16 Unrealized
RIGEL PHARMACEUTICALS INC 0.3%
Value $3.045M Shares 1,464,050 Est. Cost $2.79 Unrealized
AURIS MED HLDG AG 0.2%
Value $2.867M Shares 787,600 Est. Cost $3.64 Unrealized
SCYNEXIS INC 0.2%
Value $2.559M Shares 635,000 Est. Cost $7.42 Unrealized
SRPT SAREPTA THERAPEUTICS INC 0.2%
Value $2.557M Shares 131,000 Est. Cost $29.74 Unrealized -41.3%
CLOVIS ONCOLOGY INC 0.2%
Value $2.4M Shares 125,000 Est. Cost $35.00 Unrealized
ALDER BIOPHARMACEUTICALS INC 0.2%
Value $2.388M Shares 97,500 Est. Cost $24.49 Unrealized
DBV TECHNOLOGIES S A 0.2%
Value $2.376M Shares 73,000 Est. Cost $33.59 Unrealized
VALEANT PHARMACEUTICALS INTL 0.2%
Value $2.249M Shares 85,500 Est. Cost $174.16 Unrealized
OPHTHOTECH CORP 0.2%
Value $2.177M Shares 51,500 Est. Cost $42.27 Unrealized
DIMENSION THERAPEUTICS INC 0.2%
Value $2.125M Shares 271,370 Est. Cost $11.28 Unrealized
EGALET CORP 0.2%
Value $2.058M Shares 300,000 Est. Cost $13.18 Unrealized
NIVALIS THERAPEUTICS INC 0.2%
Value $2.039M Shares 489,000 Est. Cost $15.15 Unrealized
ASSEMBLY BIOSCIENCES INC 0.2%
Value $1.958M Shares 390,000 Est. Cost $12.30 Unrealized
TETRAPHASE PHARMACEUTICALS I 0.2%
Value $1.852M Shares 400,000 Est. Cost $7.33 Unrealized
ATYR PHARMA INC 0.1%
Value $1.708M Shares 433,496 Est. Cost $17.38 Unrealized
CERULEAN PHARMA INC 0.1%
Value $1.694M Shares 625,000 Est. Cost $5.94 Unrealized
ANTHERA PHARMACEUTICALS INC 0.1%
Value $1.629M Shares 450,000 Est. Cost $4.67 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.1%
Value $1.423M Shares 270,000 Est. Cost $11.28 Unrealized -45.8%
INTERCEPT PHARMACEUTICALS IN 0.1%
Value $1.285M Shares 10,000 Est. Cost $197.65 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.1%
Value $1.237M Shares 78,000 Est. Cost $38.31 Unrealized
OREXIGEN THERAPEUTICS INC 0.1%
Value $930K Shares 1,653,000 Est. Cost $5.43 Unrealized
PBYI PUMA BIOTECHNOLOGY INC 0.1%
Value $925K Shares 31,500 Est. Cost $89.73 Unrealized -49.6%
SOPHIRIS BIO INC 0.1%
Value $905K Shares 628,563 Est. Cost $1.81 Unrealized
WRIGHT MED GROUP INC 0.1%
Value $898K Shares 1,000,000 Est. Cost $0.90 Unrealized
BLUEBIRD BIO INC 0.1%
Value $850K Shares 20,000 Est. Cost $125.79 Unrealized
PORTOLA PHARMACEUTICALS INC 0.1%
Value $714K Shares 35,000 Est. Cost $49.67 Unrealized
MIRNA THERAPEUTICS INC 0.1%
Value $656K Shares 150,000 Est. Cost $6.25 Unrealized