Rock Springs Capital Management LP Q2 2017 Filing
Filed August 14, 2017
Portfolio Value
$2.0T
Holdings
148
Report Date
Q2 2017
Filing Type
13F-HR
All Holdings (148 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | —TESARO INC | 490,500 | $68.6B | 3.46% | |
| 2 | ACHCACADIA HEALTHCARE COMPANY IN | 1,350,000 | $66.7B | 3.37% | |
| 3 | —AETNA INC NEW | 388,000 | $58.9B | 2.97% | |
| 4 | UNHUNITEDHEALTH GROUP INC | 314,000 | $58.2B | 2.94% | |
| 5 | ALXNALEXION PHARMACEUTICALS INC | 463,000 | $56.3B | 2.84% | |
| 6 | PCRXPACIRA PHARMACEUTICALS INC | 1,042,500 | $49.7B | 2.51% | |
| 7 | MRKMERCK & CO INC | 758,000 | $48.6B | 2.45% | |
| 8 | CICIGNA CORPORATION | 270,000 | $45.2B | 2.28% | |
| 9 | ISRGINTUITIVE SURGICAL INC | 48,000 | $44.9B | 2.27% | |
| 10 | —RADIUS HEALTH INC | 910,250 | $41.2B | 2.08% | |
| 11 | —ALLERGAN PLC | 155,900 | $37.9B | 1.91% | |
| 12 | —SPARK THERAPEUTICS INC | 625,000 | $37.3B | 1.89% | |
| 13 | —GW PHARMACEUTICALS PLC | 365,500 | $36.6B | 1.85% | |
| 14 | MDTMEDTRONIC PLC | 400,000 | $35.5B | 1.79% | |
| 15 | WCGEURWELLCARE HEALTH PLANS INC | 197,500 | $35.5B | 1.79% | |
| 16 | PRAHPRA HEALTH SCIENCES INC | 462,500 | $34.7B | 1.75% | |
| 17 | —ADVANCED ACCELERATOR APPLIC | 840,000 | $32.8B | 1.66% | |
| 18 | HUMHUMANA INC | 132,500 | $31.9B | 1.61% | |
| 19 | CELGCELGENE CORP | 245,000 | $31.8B | 1.61% | |
| 20 | PENPENUMBRA INC | 310,500 | $27.2B | 1.38% | |
| 21 | —MEDICINES CO | 694,446 | $26.4B | 1.33% | |
| 22 | TBPHTHERAVANCE BIOPHARMA INC | 600,000 | $23.9B | 1.21% | |
| 23 | JNJJOHNSON & JOHNSON | 175,000 | $23.2B | 1.17% | |
| 24 | —LOXO ONCOLOGY INC | 288,000 | $23.1B | 1.17% | |
| 25 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,798,195 | $22.5B | 1.14% | |
| 26 | EWEDWARDS LIFESCIENCES CORP | 190,001 | $22.5B | 1.13% | |
| 27 | —ALMOST FAMILY INC | 362,000 | $22.3B | 1.13% | |
| 28 | GILDGILEAD SCIENCES INC | 313,400 | $22.2B | 1.12% | |
| 29 | INCYINCYTE CORP | 173,000 | $21.8B | 1.10% | |
| 30 | CLVSEURCLOVIS ONCOLOGY INC | 231,500 | $21.7B | 1.09% | |
| 31 | —MERSANA THERAPEUTICS INC | 1,527,893 | $21.3B | 1.08% | |
| 32 | NBIXNEUROCRINE BIOSCIENCES INC | 419,000 | $19.3B | 0.97% | |
| 33 | JAZZJAZZ PHARMACEUTICALS PLC | 123,700 | $19.2B | 0.97% | |
| 34 | TMOTHERMO FISHER SCIENTIFIC INC | 110,000 | $19.2B | 0.97% | |
| 35 | HOLXHOLOGIC INC | 420,000 | $19.1B | 0.96% | |
| 36 | DHRDANAHER CORP DEL | 225,000 | $19.0B | 0.96% | |
| 37 | —WRIGHT MED GROUP N V | 670,000 | $18.4B | 0.93% | |
| 38 | MOHMOLINA HEALTHCARE INC | 263,500 | $18.2B | 0.92% | |
| 39 | BCRUSDBARD C R INC | 57,500 | $18.2B | 0.92% | |
| 40 | —EPIZYME INC | 1,175,000 | $17.7B | 0.90% | |
| 41 | AMRNAMARIN CORP PLC | 4,250,000 | $17.1B | 0.86% | |
| 42 | GLPGGALAPAGOS NV | 221,500 | $16.9B | 0.86% | |
| 43 | PRTAPROTHENA CORP PLC | 309,500 | $16.8B | 0.85% | |
| 44 | VRTXVERTEX PHARMACEUTICALS INC | 129,000 | $16.6B | 0.84% | |
| 45 | PBYIPUMA BIOTECHNOLOGY INC | 186,000 | $16.3B | 0.82% | |
| 46 | WTWWILLIS TOWERS WATSON PUB LTD | 110,000 | $16.0B | 0.81% | |
| 47 | —PORTOLA PHARMACEUTICALS INC | 279,700 | $15.7B | 0.79% | Call |
| 48 | EXASEXACT SCIENCES CORP | 437,500 | $15.5B | 0.78% | |
| 49 | —PARATEK PHARMACEUTICALS INC | 600,000 | $14.5B | 0.73% | |
| 50 | BIIBBIOGEN INC | 53,000 | $14.4B | 0.73% | |
| 51 | —AVEXIS INC | 175,000 | $14.4B | 0.73% | |
| 52 | BAXBAXTER INTL INC | 230,000 | $13.9B | 0.70% | |
| 53 | —HEALTHSOUTH CORP | 265,000 | $12.8B | 0.65% | |
| 54 | ACRSACLARIS THERAPEUTICS INC | 440,000 | $11.9B | 0.60% | |
| 55 | ONCBEIGENE LTD | 265,000 | $11.9B | 0.60% | |
| 56 | NVTA1EURINVITAE CORP | 1,200,000 | $11.5B | 0.58% | |
| 57 | —RTI SURGICAL INC | 1,950,000 | $11.4B | 0.58% | |
| 58 | —AUDENTES THERAPEUTICS INC | 595,200 | $11.4B | 0.57% | |
| 59 | BMRNBIOMARIN PHARMACEUTICAL INC | 125,000 | $11.4B | 0.57% | |
| 60 | —DERMIRA INC | 387,600 | $11.3B | 0.57% | |
| 61 | —RA PHARMACEUTICALS INC | 600,000 | $11.2B | 0.57% | |
| 62 | ARDXARDELYX INC | 2,000,000 | $10.2B | 0.52% | |
| 63 | RAREULTRAGENYX PHARMACEUTICAL IN | 160,500 | $10.0B | 0.50% | |
| 64 | CHRSCOHERUS BIOSCIENCES INC | 693,900 | $10.0B | 0.50% | |
| 65 | —INTERSECT ENT INC | 345,000 | $9.6B | 0.49% | |
| 66 | FGENEURFIBROGEN INC | 280,000 | $9.0B | 0.46% | |
| 67 | ASNDASCENDIS PHARMA A S | 325,000 | $9.0B | 0.46% | |
| 68 | MDGLMADRIGAL PHARMACEUTICALS INC | 540,000 | $8.8B | 0.44% | |
| 69 | CLSDUSDCLEARSIDE BIOMEDICAL INC | 935,000 | $8.5B | 0.43% | |
| 70 | —THERAPEUTICSMD INC | 1,600,000 | $8.4B | 0.43% | |
| 71 | ALNYALNYLAM PHARMACEUTICALS INC | 105,000 | $8.4B | 0.42% | |
| 72 | —CHINA CORD BLOOD CORP | 880,000 | $8.3B | 0.42% | |
| 73 | ASMBASSEMBLY BIOSCIENCES INC | 390,000 | $8.1B | 0.41% | |
| 74 | IM8NINSMED INC | 468,000 | $8.0B | 0.41% | |
| 75 | —ACHILLION PHARMACEUTICALS IN | 1,725,000 | $7.9B | 0.40% | |
| 76 | REGNREGENERON PHARMACEUTICALS | 16,000 | $7.9B | 0.40% | |
| 77 | —RETROPHIN INC | 400,000 | $7.8B | 0.39% | |
| 78 | —BIOHAVEN PHARMACTL HLDG CO L | 307,000 | $7.7B | 0.39% | |
| 79 | AM6AMICUS THERAPEUTICS INC | 757,500 | $7.6B | 0.39% | |
| 80 | —OBSEVA SA | 840,000 | $7.2B | 0.36% | |
| 81 | —NEURODERM LTD | 237,700 | $7.1B | 0.36% | |
| 82 | —KITE PHARMA INC | 67,500 | $7.0B | 0.35% | |
| 83 | SRPTSAREPTA THERAPEUTICS INC | 205,000 | $6.9B | 0.35% | |
| 84 | WBAWALGREENS BOOTS ALLIANCE INC | 86,000 | $6.7B | 0.34% | |
| 85 | —JUNO THERAPEUTICS INC | 225,000 | $6.7B | 0.34% | |
| 86 | LXRXLEXICON PHARMACEUTICALS INC | 393,500 | $6.5B | 0.33% | Call |
| 87 | MRUSMERUS N V | 402,000 | $6.4B | 0.32% | |
| 88 | AXGNAXOGEN INC | 375,000 | $6.3B | 0.32% | |
| 89 | —AIMMUNE THERAPEUTICS INC | 293,000 | $6.0B | 0.30% | |
| 90 | —FIVE PRIME THERAPEUTICS INC | 197,000 | $5.9B | 0.30% | |
| 91 | —STERIS PLC | 72,500 | $5.9B | 0.30% | |
| 92 | —NABRIVA THERAPEUTICS PLC | 525,000 | $5.5B | 0.28% | |
| 93 | GTHXEURG1 THERAPEUTICS INC | 312,188 | $5.4B | 0.27% | |
| 94 | —CARDIOME PHARMA CORP | 1,200,000 | $5.4B | 0.27% | |
| 95 | —MEDICINES CO | 5,000,000 | $5.3B | 0.27% | |
| 96 | SGENEURSEATTLE GENETICS INC | 100,000 | $5.2B | 0.26% | |
| 97 | CRVSCORVUS PHARMACEUTICALS INC | 422,600 | $5.1B | 0.26% | |
| 98 | —EGALET CORP | 7,800,000 | $5.0B | 0.25% | |
| 99 | TTPHEURTETRAPHASE PHARMACEUTICALS I | 698,000 | $5.0B | 0.25% | |
| 100 | ACADACADIA PHARMACEUTICALS INC | 174,000 | $4.9B | 0.25% |
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