Rock Springs Capital Management LP Q4 2016 Filing
Filed February 14, 2017
Portfolio Value
$1.5T
Holdings
133
Report Date
Q4 2016
Filing Type
13F-HR
All Holdings (133 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | —TESARO INC | 613,500 | $82.5B | 5.52% | |
| 2 | ALXNALEXION PHARMACEUTICALS INC | 465,000 | $56.9B | 3.81% | |
| 3 | —AETNA INC NEW | 441,000 | $54.7B | 3.66% | |
| 4 | MRKMERCK & CO INC | 750,000 | $44.2B | 2.95% | |
| 5 | —GW PHARMACEUTICALS PLC | 356,000 | $39.8B | 2.66% | |
| 6 | ACHCACADIA HEALTHCARE COMPANY IN | 1,157,500 | $38.3B | 2.56% | |
| 7 | —ALLERGAN PLC | 166,000 | $34.9B | 2.33% | |
| 8 | —RADIUS HEALTH INC | 910,250 | $34.6B | 2.32% | |
| 9 | CICIGNA CORPORATION | 252,000 | $33.6B | 2.25% | |
| 10 | WCGEURWELLCARE HEALTH PLANS INC | 234,500 | $32.1B | 2.15% | |
| 11 | —SPARK THERAPEUTICS INC | 625,000 | $31.2B | 2.09% | |
| 12 | ISRGINTUITIVE SURGICAL INC | 48,000 | $30.4B | 2.04% | |
| 13 | ACRSACLARIS THERAPEUTICS INC | 1,100,000 | $29.9B | 2.00% | |
| 14 | ARDXARDELYX INC | 2,000,000 | $28.4B | 1.90% | |
| 15 | CELGCELGENE CORP | 242,500 | $28.1B | 1.88% | |
| 16 | UNHUNITEDHEALTH GROUP INC | 165,000 | $26.4B | 1.77% | |
| 17 | BMYBRISTOL MYERS SQUIBB CO | 450,000 | $26.3B | 1.76% | |
| 18 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,600,000 | $24.9B | 1.67% | |
| 19 | —ADVANCED ACCELERATOR APPLIC | 930,000 | $24.9B | 1.67% | |
| 20 | LLYLILLY ELI & CO | 325,000 | $23.9B | 1.60% | |
| 21 | —MEDICINES CO | 699,500 | $23.7B | 1.59% | |
| 22 | —SHIRE PLC | 137,200 | $23.4B | 1.56% | |
| 23 | PCRXPACIRA PHARMACEUTICALS INC | 713,000 | $23.0B | 1.54% | |
| 24 | GILDGILEAD SCIENCES INC | 276,500 | $19.8B | 1.32% | |
| 25 | TBPHTHERAVANCE BIOPHARMA INC | 600,000 | $19.1B | 1.28% | |
| 26 | PENPENUMBRA INC | 295,500 | $18.9B | 1.26% | |
| 27 | INCYINCYTE CORP | 169,000 | $16.9B | 1.13% | |
| 28 | PRAHPRA HEALTH SCIENCES INC | 300,000 | $16.5B | 1.11% | |
| 29 | NBIXNEUROCRINE BIOSCIENCES INC | 410,000 | $15.9B | 1.06% | |
| 30 | AMRNAMARIN CORP PLC | 4,991,500 | $15.4B | 1.03% | |
| 31 | —WRIGHT MED GROUP N V | 667,000 | $15.3B | 1.03% | |
| 32 | PRTAPROTHENA CORP PLC | 309,500 | $15.2B | 1.02% | |
| 33 | AMGNAMGEN INC | 96,500 | $14.1B | 0.94% | |
| 34 | CHRSCOHERUS BIOSCIENCES INC | 484,500 | $13.6B | 0.91% | |
| 35 | JAZZJAZZ PHARMACEUTICALS PLC | 123,700 | $13.5B | 0.90% | |
| 36 | GLPGGALAPAGOS NV | 210,000 | $13.5B | 0.90% | |
| 37 | WTWWILLIS TOWERS WATSON PUB LTD | 110,000 | $13.5B | 0.90% | |
| 38 | BIIBBIOGEN INC | 47,000 | $13.3B | 0.89% | |
| 39 | WBAWALGREENS BOOTS ALLIANCE INC | 161,000 | $13.3B | 0.89% | |
| 40 | —RA PHARMACEUTICALS INC | 826,000 | $12.5B | 0.84% | |
| 41 | DHRDANAHER CORP DEL | 160,000 | $12.5B | 0.83% | |
| 42 | —PATHEON N V | 400,000 | $11.5B | 0.77% | |
| 43 | EWEDWARDS LIFESCIENCES CORP | 120,500 | $11.3B | 0.76% | |
| 44 | RAREULTRAGENYX PHARMACEUTICAL IN | 159,750 | $11.2B | 0.75% | |
| 45 | —DERMIRA INC | 362,600 | $11.0B | 0.74% | |
| 46 | —HEALTHSOUTH CORP | 265,000 | $10.9B | 0.73% | |
| 47 | HOLXHOLOGIC INC | 265,000 | $10.6B | 0.71% | |
| 48 | BMRNBIOMARIN PHARMACEUTICAL INC | 125,000 | $10.4B | 0.69% | |
| 49 | —THERAPEUTICSMD INC | 1,720,000 | $9.9B | 0.66% | |
| 50 | —RETROPHIN INC | 522,000 | $9.9B | 0.66% | |
| 51 | NVTA1EURINVITAE CORP | 1,200,000 | $9.5B | 0.64% | |
| 52 | —ENVISION HEALTHCARE CORP | 145,000 | $9.2B | 0.61% | |
| 53 | —AUDENTES THERAPEUTICS INC | 485,000 | $8.9B | 0.59% | |
| 54 | MRUSMERUS N V | 400,000 | $8.4B | 0.57% | |
| 55 | CLSDUSDCLEARSIDE BIOMEDICAL INC | 935,000 | $8.4B | 0.56% | |
| 56 | —FIVE PRIME THERAPEUTICS INC | 164,000 | $8.2B | 0.55% | |
| 57 | —PARATEK PHARMACEUTICALS INC | 525,500 | $8.1B | 0.54% | |
| 58 | ONCBEIGENE LTD | 265,000 | $8.0B | 0.54% | |
| 59 | REGNREGENERON PHARMACEUTICALS | 19,500 | $7.2B | 0.48% | |
| 60 | LGNDLIGAND PHARMACEUTICALS INC | 70,000 | $7.1B | 0.48% | |
| 61 | ALKSALKERMES PLC | 125,000 | $6.9B | 0.46% | |
| 62 | —EPIZYME INC | 570,000 | $6.9B | 0.46% | |
| 63 | —EGALET CORP | 7,800,000 | $6.8B | 0.45% | |
| 64 | —AVEXIS INC | 140,000 | $6.7B | 0.45% | |
| 65 | VRTXVERTEX PHARMACEUTICALS INC | 89,750 | $6.6B | 0.44% | |
| 66 | —ATHENAHEALTH INC | 62,750 | $6.6B | 0.44% | |
| 67 | ASNDASCENDIS PHARMA A S | 325,000 | $6.6B | 0.44% | |
| 68 | CRVSCORVUS PHARMACEUTICALS INC | 450,000 | $6.4B | 0.43% | |
| 69 | IM8NINSMED INC | 468,000 | $6.2B | 0.41% | |
| 70 | —RTI SURGICAL INC | 1,860,000 | $6.0B | 0.40% | |
| 71 | EXASEXACT SCIENCES CORP | 450,900 | $6.0B | 0.40% | |
| 72 | —AIMMUNE THERAPEUTICS INC | 293,000 | $6.0B | 0.40% | |
| 73 | —ACHILLION PHARMACEUTICALS IN | 1,375,000 | $5.7B | 0.38% | |
| 74 | —PROTEOSTASIS THERAPEUTICS IN | 450,000 | $5.5B | 0.37% | |
| 75 | —CHINA CORD BLOOD CORP | 880,000 | $5.4B | 0.36% | |
| 76 | SRPTSAREPTA THERAPEUTICS INC | 191,900 | $5.3B | 0.35% | |
| 77 | FGENEURFIBROGEN INC | 240,000 | $5.1B | 0.34% | |
| 78 | CLVSEURCLOVIS ONCOLOGY INC | 110,000 | $4.9B | 0.33% | |
| 79 | MEDPMEDPACE HLDGS INC | 135,000 | $4.9B | 0.33% | |
| 80 | ASMBASSEMBLY BIOSCIENCES INC | 390,000 | $4.7B | 0.32% | |
| 81 | —ADURO BIOTECH INC | 415,000 | $4.7B | 0.32% | |
| 82 | MGNXMACROGENICS INC | 225,000 | $4.6B | 0.31% | |
| 83 | —STERIS PLC | 65,000 | $4.4B | 0.29% | |
| 84 | CGENCOMPUGEN LTD | 825,000 | $4.2B | 0.28% | |
| 85 | —INTERSECT ENT INC | 345,000 | $4.2B | 0.28% | |
| 86 | —NOVADAQ TECHNOLOGIES INC | 555,000 | $3.9B | 0.26% | |
| 87 | —ALLERGAN PLC | 5,000 | $3.8B | 0.26% | |
| 88 | —ALDER BIOPHARMACEUTICALS INC | 182,000 | $3.8B | 0.25% | |
| 89 | AM6AMICUS THERAPEUTICS INC | 757,500 | $3.8B | 0.25% | |
| 90 | —JUNO THERAPEUTICS INC | 197,001 | $3.7B | 0.25% | |
| 91 | —MEDICINES CO | 3,000,000 | $3.6B | 0.24% | |
| 92 | INVAINNOVIVA INC | 336,900 | $3.6B | 0.24% | |
| 93 | —KITE PHARMA INC | 79,000 | $3.5B | 0.24% | |
| 94 | OTICEUROTONOMY INC | 210,000 | $3.3B | 0.22% | |
| 95 | —CARDIOME PHARMA CORP | 1,200,000 | $3.3B | 0.22% | |
| 96 | —NABRIVA THERAPEUTICS AG | 525,000 | $3.1B | 0.21% | |
| 97 | —CIDARA THERAPEUTICS INC | 300,000 | $3.1B | 0.21% | |
| 98 | —ARIAD PHARMACEUTICALS INC | 250,000 | $3.1B | 0.21% | |
| 99 | PBYIPUMA BIOTECHNOLOGY INC | 94,500 | $2.9B | 0.19% | |
| 100 | ITCIEURINTRA CELLULAR THERAPIES INC | 190,000 | $2.9B | 0.19% |
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