Rock Springs Capital Management LP Diversified Active

Location: Baltimore, MD

CIK: 0001595725 · Show all filings

Period: Q4 2015 (← Previous) (Next →)

Filing Date: Feb 16, 2016

Total Value: $1.32B (100.0% shares, 0.0% debt)

Holdings (120)

ALLERGAN PLC 3.8%
Value $50.63M Shares 162,000 Est. Cost $304.59 Unrealized
AETNA INC NEW 3.4%
Value $44.44M Shares 411,000 Est. Cost $100.59 Unrealized
ACHC ACADIA HEALTHCARE COMPANY IN 3.2%
Value $42.16M Shares 675,000 Est. Cost $64.84 Unrealized +0.5%
ALEXION PHARMACEUTICALS INC 2.8%
Value $36.81M Shares 193,000 Est. Cost $162.06 Unrealized
RADIUS HEALTH INC 2.8%
Value $36.77M Shares 597,500 Est. Cost $49.90 Unrealized
GILD GILEAD SCIENCES INC 2.5%
Value $32.92M Shares 325,300 Est. Cost $55.20 Unrealized +32.1%
BAXALTA INC 2.4%
Value $31.61M Shares 810,000 Est. Cost $39.03 Unrealized
PFE PFIZER INC 2.4%
Value $31.47M Shares 975,000 Est. Cost $20.16 Unrealized +1.1%
HCA HCA HOLDINGS INC 2.2%
Value $29.08M Shares 430,000 Est. Cost $62.20 Unrealized +4.2%
COLL COLLEGIUM PHARMACEUTICAL INC 2.1%
Value $27.65M Shares 1,005,487 Est. Cost $17.50 Unrealized +20.3%
CELGENE CORP 2.1%
Value $27.55M Shares 230,000 Est. Cost $120.46 Unrealized
SPARK THERAPEUTICS INC 1.9%
Value $25.37M Shares 560,000 Est. Cost $59.67 Unrealized
ADVANCED ACCELERATOR APPLIC 1.9%
Value $25.02M Shares 800,000 Est. Cost $31.27 Unrealized
TEVA TEVA PHARMACEUTICAL INDS LTD 1.9%
Value $24.9M Shares 379,300 Est. Cost $57.78 Unrealized
ACRS ACLARIS THERAPEUTICS INC 1.8%
Value $24.14M Shares 896,154 Est. Cost $19.34 Unrealized 0.0%
MEDICINES CO 1.8%
Value $23.34M Shares 625,000 Est. Cost $32.94 Unrealized
LLY LILLY ELI & CO 1.8%
Value $23.25M Shares 275,897 Est. Cost $60.42 Unrealized +15.4%
ISRG INTUITIVE SURGICAL INC 1.6%
Value $21.57M Shares 39,500 Est. Cost $49.81 Unrealized +12.7%
NBIX NEUROCRINE BIOSCIENCES INC 1.6%
Value $21.36M Shares 377,500 Est. Cost $17.96 Unrealized +182.9%
PCRX PACIRA PHARMACEUTICALS INC 1.5%
Value $19.96M Shares 260,000 Est. Cost $68.62 Unrealized -17.5%
CIGNA CORPORATION 1.4%
Value $17.85M Shares 122,000 Est. Cost $102.49 Unrealized
TESARO INC 1.3%
Value $17.48M Shares 334,000 Est. Cost $39.74 Unrealized
PRTA PROTHENA CORP PLC 1.3%
Value $16.89M Shares 248,000 Est. Cost $26.90 Unrealized +124.2%
ELV ANTHEM INC 1.3%
Value $16.84M Shares 120,800 Est. Cost $130.29 Unrealized -8.2%
WELLCARE HEALTH PLANS INC 1.3%
Value $16.78M Shares 214,500 Est. Cost $78.21 Unrealized
BIIB BIOGEN INC 1.2%
Value $15.52M Shares 50,650 Est. Cost $275.21 Unrealized +4.4%
MCK MCKESSON CORP 1.1%
Value $14.3M Shares 72,500 Est. Cost $158.81 Unrealized +9.9%
TMO THERMO FISHER SCIENTIFIC INC 1.1%
Value $14.19M Shares 100,000 Est. Cost $124.72 Unrealized +3.8%
MD MEDNAX INC 1.0%
Value $13.83M Shares 193,000 Est. Cost $78.32 Unrealized -5.6%
INCY INCYTE CORP 1.0%
Value $13.77M Shares 127,000 Est. Cost $58.23 Unrealized +91.5%
GLPG GALAPAGOS NV 1.0%
Value $13.21M Shares 210,000 Est. Cost $48.55 Unrealized
AMGN AMGEN INC 1.0%
Value $13.13M Shares 80,900 Est. Cost $88.59 Unrealized +31.5%
RETROPHIN INC 1.0%
Value $13.02M Shares 675,000 Est. Cost $23.91 Unrealized
ARDX ARDELYX INC 0.9%
Value $12.37M Shares 682,500 Est. Cost $13.24 Unrealized +40.6%
THERAPEUTICSMD INC 0.9%
Value $12.29M Shares 1,185,000 Est. Cost $7.42 Unrealized
ACHILLION PHARMACEUTICALS IN 0.9%
Value $11.92M Shares 1,105,000 Est. Cost $10.13 Unrealized
RARE ULTRAGENYX PHARMACEUTICAL IN 0.9%
Value $11.84M Shares 105,500 Est. Cost $59.56 Unrealized +67.9%
ADURO BIOTECH INC 0.9%
Value $11.68M Shares 415,000 Est. Cost $28.61 Unrealized
PRA HEALTH SCIENCES INC 0.9%
Value $11.45M Shares 253,000 Est. Cost $24.22 Unrealized
JAZZ JAZZ PHARMACEUTICALS PLC 0.9%
Value $11.29M Shares 80,300 Est. Cost $155.41 Unrealized -10.8%
PEN PENUMBRA INC 0.8%
Value $11.03M Shares 205,000 Est. Cost $40.68 Unrealized +11.3%
WRIGHT MED GROUP N V 0.8%
Value $11.03M Shares 456,000 Est. Cost $24.18 Unrealized
TBPH THERAVANCE BIOPHARMA INC 0.8%
Value $10.57M Shares 645,000 Est. Cost $18.85 Unrealized -15.8%
DERMIRA INC 0.8%
Value $10.04M Shares 290,000 Est. Cost $18.60 Unrealized
INSYS THERAPEUTICS INC NEW 0.7%
Value $9.691M Shares 338,500 Est. Cost $31.71 Unrealized
INTRA CELLULAR THERAPIES INC 0.7%
Value $9.682M Shares 180,000 Est. Cost $40.04 Unrealized
CARDIOME PHARMA CORP 0.7%
Value $9.651M Shares 1,190,000 Est. Cost $8.88 Unrealized
CHIASMA INC 0.7%
Value $9.54M Shares 487,500 Est. Cost $19.88 Unrealized
IDXX IDEXX LABS INC 0.7%
Value $9.297M Shares 127,500 Est. Cost $69.50 Unrealized +2.6%
ADAPY ADAPTIMMUNE THERAPEUTICS PLC 0.7%
Value $9.226M Shares 765,001 Est. Cost $18.26 Unrealized
VRTX VERTEX PHARMACEUTICALS INC 0.7%
Value $9.154M Shares 72,750 Est. Cost $84.03 Unrealized +43.7%
ANACOR PHARMACEUTICALS INC 0.7%
Value $8.699M Shares 77,000 Est. Cost $117.71 Unrealized
JUNO THERAPEUTICS INC 0.7%
Value $8.662M Shares 197,001 Est. Cost $52.64 Unrealized
SERES THERAPEUTICS INC 0.7%
Value $8.611M Shares 245,400 Est. Cost $39.79 Unrealized
VALEANT PHARMACEUTICALS INTL 0.6%
Value $8.508M Shares 83,700 Est. Cost $177.34 Unrealized
PORTOLA PHARMACEUTICALS INC 0.6%
Value $8.489M Shares 165,000 Est. Cost $51.45 Unrealized
INOVALON HLDGS INC 0.6%
Value $8.114M Shares 477,300 Est. Cost $27.87 Unrealized
HEARTWARE INTL INC 0.6%
Value $8.098M Shares 160,669 Est. Cost $68.66 Unrealized
GW PHARMACEUTICALS PLC 0.6%
Value $8.055M Shares 116,000 Est. Cost $80.68 Unrealized
INSM INSMED INC 0.6%
Value $7.85M Shares 432,500 Est. Cost $17.62 Unrealized +0.0%
INTERSECT ENT INC 0.6%
Value $7.589M Shares 337,293 Est. Cost $25.85 Unrealized
RTI SURGICAL INC 0.6%
Value $7.384M Shares 1,860,000 Est. Cost $4.28 Unrealized
BMRN BIOMARIN PHARMACEUTICAL INC 0.6%
Value $7.333M Shares 70,000 Est. Cost $112.60 Unrealized -7.4%
RELYPSA INC 0.5%
Value $7.142M Shares 252,000 Est. Cost $26.92 Unrealized
NOVADAQ TECHNOLOGIES INC 0.5%
Value $6.88M Shares 540,000 Est. Cost $14.38 Unrealized
HEALTHSOUTH CORP 0.5%
Value $6.788M Shares 195,000 Est. Cost $43.13 Unrealized
MGNX MACROGENICS INC 0.5%
Value $6.751M Shares 218,000 Est. Cost $32.86 Unrealized -7.6%
TANDEM DIABETES CARE INC 0.5%
Value $6.643M Shares 562,500 Est. Cost $13.74 Unrealized
CHRS COHERUS BIOSCIENCES INC 0.5%
Value $6.475M Shares 282,000 Est. Cost $21.12 Unrealized +21.9%
NOVAVAX INC 0.5%
Value $6.46M Shares 770,000 Est. Cost $5.56 Unrealized
ENVISION HEALTHCARE HLDGS IN 0.5%
Value $6.363M Shares 245,000 Est. Cost $36.18 Unrealized
ATHENAHEALTH INC 0.5%
Value $6.358M Shares 39,500 Est. Cost $116.34 Unrealized
XENOPORT INC 0.5%
Value $6.039M Shares 1,100,000 Est. Cost $5.44 Unrealized
REGN REGENERON PHARMACEUTICALS 0.5%
Value $5.972M Shares 11,000 Est. Cost $402.47 Unrealized +33.9%
EPIZYME INC 0.4%
Value $5.927M Shares 370,000 Est. Cost $21.24 Unrealized
COOPER COS INC 0.4%
Value $5.905M Shares 44,000 Est. Cost $137.27 Unrealized
FIBROGEN INC 0.4%
Value $5.789M Shares 190,000 Est. Cost $26.56 Unrealized
CHINA CORD BLOOD CORP 0.4%
Value $5.606M Shares 880,000 Est. Cost $4.24 Unrealized
FIVE PRIME THERAPEUTICS INC 0.4%
Value $5.603M Shares 135,000 Est. Cost $22.66 Unrealized
FOLD AMICUS THERAPEUTICS INC 0.4%
Value $5.495M Shares 566,500 Est. Cost $11.93 Unrealized -24.5%
OTONOMY INC 0.4%
Value $5.481M Shares 197,500 Est. Cost $22.99 Unrealized
ABBV ABBVIE INC 0.4%
Value $5.184M Shares 87,500 Est. Cost $35.44 Unrealized +7.1%
CGEN COMPUGEN LTD 0.4%
Value $5.144M Shares 805,000 Est. Cost $6.08 Unrealized +7.8%
AGN 5.5 03/01/18 A ALLERGAN PLC 0.4%
Value $5.136M Shares 5,000 Est. Cost $1045.60 Unrealized
INVITAE CORP 0.4%
Value $5.114M Shares 622,900 Est. Cost $12.70 Unrealized
ASND ASCENDIS PHARMA A S 0.4%
Value $4.946M Shares 270,000 Est. Cost $17.64 Unrealized
KITE PHARMA INC 0.4%
Value $4.93M Shares 80,000 Est. Cost $46.24 Unrealized
ENDOCHOICE HLDGS INC 0.4%
Value $4.927M Shares 590,000 Est. Cost $16.16 Unrealized
NVCR NOVOCURE LTD 0.4%
Value $4.792M Shares 214,316 Est. Cost $23.86 Unrealized 0.0%
AIMMUNE THERAPEUTICS INC 0.4%
Value $4.79M Shares 259,646 Est. Cost $23.74 Unrealized
DYAX CORP 0.4%
Value $4.665M Shares 124,000 Est. Cost $26.63 Unrealized
CLOVIS ONCOLOGY INC 0.3%
Value $4.375M Shares 125,000 Est. Cost $35.00 Unrealized
PRGO PERRIGO CO PLC 0.3%
Value $4.341M Shares 30,000 Est. Cost $153.80 Unrealized 0.0%
CIDARA THERAPEUTICS INC 0.3%
Value $4.29M Shares 250,000 Est. Cost $13.90 Unrealized
SRPT SAREPTA THERAPEUTICS INC 0.3%
Value $4.147M Shares 107,500 Est. Cost $32.42 Unrealized 0.0%
ATYR PHARMA INC 0.3%
Value $4.081M Shares 415,196 Est. Cost $17.97 Unrealized
SCYNEXIS INC 0.3%
Value $3.943M Shares 635,000 Est. Cost $7.42 Unrealized
NIVALIS THERAPEUTICS INC 0.3%
Value $3.785M Shares 489,000 Est. Cost $15.15 Unrealized
DYNAVAX TECHNOLOGIES CORP 0.3%
Value $3.624M Shares 150,000 Est. Cost $24.54 Unrealized
RIGEL PHARMACEUTICALS INC 0.3%
Value $3.333M Shares 1,100,000 Est. Cost $3.03 Unrealized
EGALET CORP 0.3%
Value $3.306M Shares 300,000 Est. Cost $13.18 Unrealized
DIMENSION THERAPEUTICS INC 0.2%
Value $3.061M Shares 271,370 Est. Cost $11.28 Unrealized
OREXIGEN THERAPEUTICS INC 0.2%
Value $2.838M Shares 1,650,000 Est. Cost $5.43 Unrealized
ASSEMBLY BIOSCIENCES INC 0.2%
Value $2.786M Shares 371,000 Est. Cost $12.67 Unrealized
GENOCEA BIOSCIENCES INC 0.2%
Value $2.53M Shares 480,000 Est. Cost $6.85 Unrealized
INTERCEPT PHARMACEUTICALS IN 0.2%
Value $2.315M Shares 15,500 Est. Cost $197.65 Unrealized
GLOBAL BLOOD THERAPEUTICS IN 0.2%
Value $2.279M Shares 70,500 Est. Cost $40.70 Unrealized
NABRIVA THERAPEUTICS AG 0.2%
Value $2.244M Shares 235,000 Est. Cost $9.50 Unrealized
SRPT SAREPTA THERAPEUTICS INC 0.2%
Value $2.056M Shares 53,300 Est. Cost $32.42 Unrealized 0.0%
TETRAPHASE PHARMACEUTICALS I 0.2%
Value $2.006M Shares 200,000 Est. Cost $10.03 Unrealized
ANTHERA PHARMACEUTICALS INC 0.1%
Value $1.763M Shares 380,000 Est. Cost $4.87 Unrealized
CERULEAN PHARMA INC 0.1%
Value $1.75M Shares 625,000 Est. Cost $5.94 Unrealized
INFIQ INFINITY PHARMACEUTICALS INC 0.1%
Value $1.688M Shares 215,000 Est. Cost $12.60 Unrealized -31.7%
BLUEBIRD BIO INC 0.1%
Value $1.284M Shares 20,000 Est. Cost $125.79 Unrealized
SOPHIRIS BIO INC 0.1%
Value $1.138M Shares 628,563 Est. Cost $1.81 Unrealized
MIRNA THERAPEUTICS INC 0.1%
Value $938K Shares 150,000 Est. Cost $6.25 Unrealized
DBV TECHNOLOGIES S A 0.1%
Value $908K Shares 25,000 Est. Cost $35.60 Unrealized
PBYI PUMA BIOTECHNOLOGY INC 0.1%
Value $862K Shares 11,000 Est. Cost $172.74 Unrealized -54.6%
PARATEK PHARMACEUTICALS INC 0.0%
Value $585K Shares 30,827 Est. Cost $18.98 Unrealized
ARATANA THERAPEUTICS INC 0.0%
Value $242K Shares 43,445 Est. Cost $12.58 Unrealized