Rock Springs Capital Management LP Q3 2017 Filing
Filed November 14, 2017
Portfolio Value
$2.2T
Holdings
147
Report Date
Q3 2017
Filing Type
13F-HR
All Holdings (147 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | UNHUNITEDHEALTH GROUP INC | 459,000 | $89.9B | 4.15% | |
| 2 | ALXNALEXION PHARMACEUTICALS INC | 463,000 | $65.0B | 3.00% | |
| 3 | —TESARO INC | 495,250 | $63.9B | 2.95% | |
| 4 | —AETNA INC NEW | 399,000 | $63.4B | 2.93% | |
| 5 | ACHCACADIA HEALTHCARE COMPANY IN | 1,305,000 | $62.3B | 2.88% | |
| 6 | —SPARK THERAPEUTICS INC | 597,000 | $53.2B | 2.46% | |
| 7 | —ADVANCED ACCELERATOR APPLIC | 784,500 | $53.0B | 2.45% | |
| 8 | CICIGNA CORPORATION | 270,000 | $50.5B | 2.33% | |
| 9 | ISRGINTUITIVE SURGICAL INC | 48,000 | $50.2B | 2.32% | |
| 10 | MRKMERCK & CO INC | 758,000 | $48.5B | 2.24% | |
| 11 | PCRXPACIRA PHARMACEUTICALS INC | 1,088,000 | $40.9B | 1.88% | |
| 12 | PBYIPUMA BIOTECHNOLOGY INC | 330,000 | $39.5B | 1.82% | |
| 13 | CELGCELGENE CORP | 262,500 | $38.3B | 1.77% | |
| 14 | —GW PHARMACEUTICALS PLC | 373,000 | $37.9B | 1.75% | |
| 15 | PRAHPRA HEALTH SCIENCES INC | 477,500 | $36.4B | 1.68% | |
| 16 | —RADIUS HEALTH INC | 943,000 | $36.4B | 1.68% | |
| 17 | WCGEURWELLCARE HEALTH PLANS INC | 197,500 | $33.9B | 1.56% | |
| 18 | MOHMOLINA HEALTHCARE INC | 422,500 | $29.1B | 1.34% | |
| 19 | ONCBEIGENE LTD | 280,000 | $29.0B | 1.34% | |
| 20 | PENPENUMBRA INC | 310,500 | $28.0B | 1.29% | |
| 21 | NBIXNEUROCRINE BIOSCIENCES INC | 440,000 | $27.0B | 1.24% | |
| 22 | —LOXO ONCOLOGY INC | 285,500 | $26.3B | 1.21% | |
| 23 | —EPIZYME INC | 1,350,000 | $25.7B | 1.19% | |
| 24 | —MEDICINES CO | 690,000 | $25.6B | 1.18% | |
| 25 | GILDGILEAD SCIENCES INC | 313,400 | $25.4B | 1.17% | |
| 26 | VRTXVERTEX PHARMACEUTICALS INC | 151,500 | $23.0B | 1.06% | |
| 27 | —MERSANA THERAPEUTICS INC | 1,330,000 | $23.0B | 1.06% | |
| 28 | JNJJOHNSON & JOHNSON | 175,000 | $22.8B | 1.05% | |
| 29 | TBPHTHERAVANCE BIOPHARMA INC | 644,400 | $22.1B | 1.02% | |
| 30 | GLPGGALAPAGOS NV | 214,000 | $21.8B | 1.00% | |
| 31 | TMOTHERMO FISHER SCIENTIFIC INC | 110,000 | $20.8B | 0.96% | |
| 32 | EWEDWARDS LIFESCIENCES CORP | 190,001 | $20.8B | 0.96% | |
| 33 | EXASEXACT SCIENCES CORP | 437,400 | $20.6B | 0.95% | |
| 34 | IM8NINSMED INC | 650,000 | $20.3B | 0.94% | |
| 35 | INCYINCYTE CORP | 173,000 | $20.2B | 0.93% | |
| 36 | PRTAPROTHENA CORP PLC | 309,500 | $20.0B | 0.92% | |
| 37 | IRTCIRHYTHM TECHNOLOGIES INC | 386,000 | $20.0B | 0.92% | |
| 38 | —ALMOST FAMILY INC | 362,000 | $19.4B | 0.90% | |
| 39 | DHRDANAHER CORP DEL | 225,000 | $19.3B | 0.89% | |
| 40 | MDTMEDTRONIC PLC | 247,364 | $19.2B | 0.89% | |
| 41 | CLVSEURCLOVIS ONCOLOGY INC | 231,500 | $19.1B | 0.88% | |
| 42 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,805,000 | $18.9B | 0.87% | |
| 43 | BCRUSDBARD C R INC | 57,500 | $18.4B | 0.85% | |
| 44 | JAZZJAZZ PHARMACEUTICALS PLC | 123,700 | $18.1B | 0.83% | |
| 45 | WTWWILLIS TOWERS WATSON PUB LTD | 115,000 | $17.7B | 0.82% | |
| 46 | —PORTOLA PHARMACEUTICALS INC | 323,800 | $17.5B | 0.81% | |
| 47 | FGENEURFIBROGEN INC | 325,000 | $17.5B | 0.81% | |
| 48 | —WRIGHT MED GROUP N V | 670,000 | $17.3B | 0.80% | |
| 49 | —AVEXIS INC | 175,000 | $16.9B | 0.78% | |
| 50 | BIIBBIOGEN INC | 53,000 | $16.6B | 0.77% | |
| 51 | —AUDENTES THERAPEUTICS INC | 525,000 | $14.7B | 0.68% | |
| 52 | BAXBAXTER INTL INC | 230,000 | $14.4B | 0.67% | |
| 53 | AMRNAMARIN CORP PLC | 4,000,000 | $14.0B | 0.65% | |
| 54 | AM6AMICUS THERAPEUTICS INC | 910,000 | $13.7B | 0.63% | |
| 55 | ASMBASSEMBLY BIOSCIENCES INC | 390,000 | $13.6B | 0.63% | |
| 56 | MDGLMADRIGAL PHARMACEUTICALS INC | 275,000 | $12.4B | 0.57% | |
| 57 | ALNYALNYLAM PHARMACEUTICALS INC | 105,000 | $12.3B | 0.57% | |
| 58 | —HEALTHSOUTH CORP | 265,000 | $12.3B | 0.57% | |
| 59 | NVTA1EURINVITAE CORP | 1,306,000 | $12.2B | 0.56% | |
| 60 | —KITE PHARMA INC | 68,000 | $12.2B | 0.56% | |
| 61 | SRPTSAREPTA THERAPEUTICS INC | 259,200 | $11.8B | 0.54% | |
| 62 | BMRNBIOMARIN PHARMACEUTICAL INC | 125,000 | $11.6B | 0.54% | |
| 63 | AFWALIGN TECHNOLOGY INC | 61,300 | $11.4B | 0.53% | |
| 64 | ACRSACLARIS THERAPEUTICS INC | 440,000 | $11.4B | 0.52% | |
| 65 | —PARATEK PHARMACEUTICALS INC | 450,000 | $11.3B | 0.52% | |
| 66 | ARDXARDELYX INC | 2,000,000 | $11.2B | 0.52% | |
| 67 | —DERMIRA INC | 400,000 | $10.8B | 0.50% | |
| 68 | —INTERSECT ENT INC | 345,000 | $10.7B | 0.50% | |
| 69 | —ALDER BIOPHARMACEUTICALS INC | 875,000 | $10.7B | 0.49% | |
| 70 | ASNDASCENDIS PHARMA A S | 280,000 | $10.2B | 0.47% | |
| 71 | —JUNO THERAPEUTICS INC | 225,000 | $10.1B | 0.47% | |
| 72 | —RETROPHIN INC | 400,000 | $10.0B | 0.46% | |
| 73 | —CHINA CORD BLOOD CORP | 880,000 | $9.8B | 0.45% | |
| 74 | —ACHILLION PHARMACEUTICALS IN | 2,131,400 | $9.6B | 0.44% | |
| 75 | —NEURODERM LTD | 237,700 | $9.2B | 0.43% | |
| 76 | —BIOHAVEN PHARMACTL HLDG CO L | 244,000 | $9.1B | 0.42% | |
| 77 | —FIVE PRIME THERAPEUTICS INC | 217,700 | $8.9B | 0.41% | |
| 78 | —RTI SURGICAL INC | 1,950,000 | $8.9B | 0.41% | |
| 79 | —RA PHARMACEUTICALS INC | 600,000 | $8.8B | 0.40% | |
| 80 | RAREULTRAGENYX PHARMACEUTICAL IN | 163,000 | $8.7B | 0.40% | |
| 81 | CHRSCOHERUS BIOSCIENCES INC | 638,400 | $8.5B | 0.39% | |
| 82 | —THERAPEUTICSMD INC | 1,600,000 | $8.5B | 0.39% | |
| 83 | ZLABZAI LAB LTD | 312,500 | $8.4B | 0.39% | |
| 84 | HQYHEALTHEQUITY INC | 165,000 | $8.3B | 0.39% | |
| 85 | CLSDUSDCLEARSIDE BIOMEDICAL INC | 935,000 | $8.2B | 0.38% | |
| 86 | AXGNAXOGEN INC | 400,000 | $7.7B | 0.36% | |
| 87 | —AIMMUNE THERAPEUTICS INC | 293,000 | $7.3B | 0.34% | |
| 88 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 875,000 | $7.2B | 0.33% | |
| 89 | REGNREGENERON PHARMACEUTICALS | 16,000 | $7.2B | 0.33% | |
| 90 | ACADACADIA PHARMACEUTICALS INC | 182,000 | $6.9B | 0.32% | |
| 91 | —OBSEVA SA | 840,000 | $6.8B | 0.32% | |
| 92 | SGENEURSEATTLE GENETICS INC | 125,000 | $6.8B | 0.31% | |
| 93 | CRVSCORVUS PHARMACEUTICALS INC | 422,600 | $6.7B | 0.31% | |
| 94 | —STERIS PLC | 74,000 | $6.5B | 0.30% | |
| 95 | TTPHEURTETRAPHASE PHARMACEUTICALS I | 950,000 | $6.5B | 0.30% | |
| 96 | 2L9BLUEPRINT MEDICINES CORP | 86,500 | $6.0B | 0.28% | |
| 97 | GTHXEURG1 THERAPEUTICS INC | 240,000 | $6.0B | 0.28% | |
| 98 | —CLEMENTIA PHARMACEUTICALS IN | 345,000 | $5.8B | 0.27% | |
| 99 | ARNAEURARENA PHARMACEUTICALS INC | 215,000 | $5.5B | 0.25% | |
| 100 | MRUSMERUS N V | 275,000 | $5.5B | 0.25% |
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