Rock Springs Capital Management LP Q1 2017 Filing
Filed May 15, 2017
Portfolio Value
$1.7T
Holdings
140
Report Date
Q1 2017
Filing Type
13F-HR
All Holdings (140 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | —TESARO INC | 474,900 | $73.1B | 4.22% | |
| 2 | ACHCACADIA HEALTHCARE COMPANY IN | 1,275,000 | $55.6B | 3.21% | |
| 3 | ALXNALEXION PHARMACEUTICALS INC | 456,900 | $55.4B | 3.20% | |
| 4 | MRKMERCK & CO INC | 750,000 | $47.7B | 2.75% | |
| 5 | PCRXPACIRA PHARMACEUTICALS INC | 1,000,000 | $45.6B | 2.63% | |
| 6 | —GW PHARMACEUTICALS PLC | 356,500 | $43.1B | 2.49% | |
| 7 | —ALLERGAN PLC | 166,000 | $39.7B | 2.29% | |
| 8 | CICIGNA CORPORATION | 270,000 | $39.6B | 2.28% | |
| 9 | ISRGINTUITIVE SURGICAL INC | 48,000 | $36.8B | 2.12% | |
| 10 | —RADIUS HEALTH INC | 910,250 | $35.2B | 2.03% | |
| 11 | —MEDICINES CO | 700,000 | $34.2B | 1.98% | |
| 12 | —ADVANCED ACCELERATOR APPLIC | 850,000 | $33.9B | 1.95% | |
| 13 | —SPARK THERAPEUTICS INC | 625,000 | $33.3B | 1.92% | |
| 14 | WCGEURWELLCARE HEALTH PLANS INC | 234,500 | $32.9B | 1.90% | |
| 15 | CELGCELGENE CORP | 242,500 | $30.2B | 1.74% | |
| 16 | PRAHPRA HEALTH SCIENCES INC | 457,500 | $29.8B | 1.72% | |
| 17 | —AETNA INC NEW | 220,000 | $28.1B | 1.62% | |
| 18 | LLYLILLY ELI & CO | 325,000 | $27.3B | 1.58% | |
| 19 | HUMHUMANA INC | 132,500 | $27.3B | 1.58% | |
| 20 | UNHUNITEDHEALTH GROUP INC | 165,000 | $27.1B | 1.56% | |
| 21 | PENPENUMBRA INC | 310,500 | $25.9B | 1.50% | |
| 22 | ARDXARDELYX INC | 2,000,000 | $25.3B | 1.46% | |
| 23 | BMYBRISTOL MYERS SQUIBB CO | 452,600 | $24.6B | 1.42% | |
| 24 | —SHIRE PLC | 138,900 | $24.2B | 1.40% | |
| 25 | INCYINCYTE CORP | 169,000 | $22.6B | 1.30% | |
| 26 | TBPHTHERAVANCE BIOPHARMA INC | 600,000 | $22.1B | 1.27% | |
| 27 | JNJJOHNSON & JOHNSON | 175,000 | $21.8B | 1.26% | |
| 28 | —WRIGHT MED GROUP N V | 670,000 | $20.9B | 1.20% | |
| 29 | ACRSACLARIS THERAPEUTICS INC | 675,000 | $20.1B | 1.16% | |
| 30 | GILDGILEAD SCIENCES INC | 286,500 | $19.5B | 1.12% | |
| 31 | GLPGGALAPAGOS NV | 210,000 | $18.1B | 1.04% | |
| 32 | JAZZJAZZ PHARMACEUTICALS PLC | 123,700 | $18.0B | 1.04% | |
| 33 | NBIXNEUROCRINE BIOSCIENCES INC | 410,000 | $17.8B | 1.02% | |
| 34 | PRTAPROTHENA CORP PLC | 309,500 | $17.3B | 1.00% | |
| 35 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,700,000 | $17.1B | 0.99% | |
| 36 | —RA PHARMACEUTICALS INC | 788,959 | $16.8B | 0.97% | |
| 37 | AMGNAMGEN INC | 98,000 | $16.1B | 0.93% | |
| 38 | AMRNAMARIN CORP PLC | 5,001,200 | $16.0B | 0.92% | |
| 39 | HOLXHOLOGIC INC | 340,000 | $14.5B | 0.83% | |
| 40 | WTWWILLIS TOWERS WATSON PUB LTD | 110,000 | $14.4B | 0.83% | |
| 41 | CHRSCOHERUS BIOSCIENCES INC | 675,000 | $14.3B | 0.82% | |
| 42 | DHRDANAHER CORP DEL | 160,000 | $13.7B | 0.79% | |
| 43 | EWEDWARDS LIFESCIENCES CORP | 142,500 | $13.4B | 0.77% | |
| 44 | WBAWALGREENS BOOTS ALLIANCE INC | 161,000 | $13.4B | 0.77% | |
| 45 | NVTA1EURINVITAE CORP | 1,200,000 | $13.3B | 0.77% | |
| 46 | —DERMIRA INC | 387,600 | $13.2B | 0.76% | |
| 47 | BIIBBIOGEN INC | 48,000 | $13.1B | 0.76% | |
| 48 | CLVSEURCLOVIS ONCOLOGY INC | 184,500 | $11.7B | 0.68% | |
| 49 | —THERAPEUTICSMD INC | 1,600,000 | $11.5B | 0.66% | |
| 50 | —HEALTHSOUTH CORP | 265,000 | $11.3B | 0.65% | |
| 51 | BMRNBIOMARIN PHARMACEUTICAL INC | 125,000 | $11.0B | 0.63% | |
| 52 | —ALMOST FAMILY INC | 225,000 | $10.9B | 0.63% | |
| 53 | RAREULTRAGENYX PHARMACEUTICAL IN | 159,750 | $10.8B | 0.62% | |
| 54 | —AVEXIS INC | 140,000 | $10.6B | 0.61% | |
| 55 | —PATHEON N V | 400,000 | $10.5B | 0.61% | |
| 56 | —PARATEK PHARMACEUTICALS INC | 525,500 | $10.1B | 0.58% | |
| 57 | ASMBASSEMBLY BIOSCIENCES INC | 390,000 | $9.9B | 0.57% | |
| 58 | VRTXVERTEX PHARMACEUTICALS INC | 90,500 | $9.9B | 0.57% | |
| 59 | —EPIZYME INC | 570,000 | $9.8B | 0.56% | |
| 60 | ONCBEIGENE LTD | 265,000 | $9.7B | 0.56% | |
| 61 | MRUSMERUS N V | 384,548 | $9.4B | 0.54% | |
| 62 | ASNDASCENDIS PHARMA A S | 325,000 | $9.1B | 0.53% | |
| 63 | —ENVISION HEALTHCARE CORP | 145,000 | $8.9B | 0.51% | |
| 64 | CRVSCORVUS PHARMACEUTICALS INC | 422,600 | $8.8B | 0.51% | |
| 65 | —OBSEVA SA | 838,634 | $8.7B | 0.50% | |
| 66 | —AUDENTES THERAPEUTICS INC | 500,000 | $8.5B | 0.49% | |
| 67 | IM8NINSMED INC | 468,000 | $8.2B | 0.47% | |
| 68 | EXASEXACT SCIENCES CORP | 337,500 | $8.0B | 0.46% | |
| 69 | —LOXO ONCOLOGY INC | 181,000 | $7.6B | 0.44% | |
| 70 | —RTI SURGICAL INC | 1,860,000 | $7.4B | 0.43% | |
| 71 | CLSDUSDCLEARSIDE BIOMEDICAL INC | 935,000 | $7.4B | 0.43% | |
| 72 | —RETROPHIN INC | 400,000 | $7.4B | 0.43% | |
| 73 | ALKSALKERMES PLC | 125,000 | $7.3B | 0.42% | |
| 74 | —ATHENAHEALTH INC | 62,750 | $7.1B | 0.41% | |
| 75 | —EGALET CORP | 7,800,000 | $6.5B | 0.37% | |
| 76 | TTPHEURTETRAPHASE PHARMACEUTICALS I | 698,000 | $6.4B | 0.37% | |
| 77 | —AIMMUNE THERAPEUTICS INC | 293,000 | $6.4B | 0.37% | |
| 78 | —ACHILLION PHARMACEUTICALS IN | 1,500,000 | $6.3B | 0.36% | |
| 79 | —NABRIVA THERAPEUTICS AG | 525,000 | $6.3B | 0.36% | |
| 80 | —FIVE PRIME THERAPEUTICS INC | 165,000 | $6.0B | 0.34% | |
| 81 | —INTERSECT ENT INC | 345,000 | $5.9B | 0.34% | |
| 82 | FGENEURFIBROGEN INC | 240,000 | $5.9B | 0.34% | |
| 83 | —CHINA CORD BLOOD CORP | 880,000 | $5.9B | 0.34% | |
| 84 | REGNREGENERON PHARMACEUTICALS | 15,100 | $5.9B | 0.34% | |
| 85 | SRPTSAREPTA THERAPEUTICS INC | 194,000 | $5.7B | 0.33% | |
| 86 | GBTUSDGLOBAL BLOOD THERAPEUTICS IN | 150,000 | $5.5B | 0.32% | |
| 87 | AM6AMICUS THERAPEUTICS INC | 757,500 | $5.4B | 0.31% | |
| 88 | LGNDLIGAND PHARMACEUTICALS INC | 50,000 | $5.3B | 0.31% | |
| 89 | —KITE PHARMA INC | 67,000 | $5.3B | 0.30% | |
| 90 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 875,000 | $4.8B | 0.28% | |
| 91 | —MEDICINES CO | 3,000,000 | $4.7B | 0.27% | |
| 92 | —STERIS PLC | 65,000 | $4.5B | 0.26% | |
| 93 | —ADURO BIOTECH INC | 415,000 | $4.5B | 0.26% | |
| 94 | —JUNO THERAPEUTICS INC | 197,001 | $4.4B | 0.25% | |
| 95 | —NOVADAQ TECHNOLOGIES INC | 555,000 | $4.3B | 0.25% | |
| 96 | —ALLERGAN PLC | 5,000 | $4.2B | 0.24% | |
| 97 | MGNXMACROGENICS INC | 225,000 | $4.2B | 0.24% | |
| 98 | AGLEUSDAEGLEA BIOTHERAPEUTICS INC | 524,089 | $3.9B | 0.23% | |
| 99 | EX9EXELIXIS INC | 175,000 | $3.8B | 0.22% | |
| 100 | —ALDER BIOPHARMACEUTICALS INC | 182,000 | $3.8B | 0.22% |
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