Rock Springs Capital Management LP Q2 2018 Filing
Filed August 14, 2018
Portfolio Value
$2.6T
Holdings
147
Report Date
Q2 2018
Filing Type
13F-HR
All Holdings (147 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | UNHUNITEDHEALTH GROUP INC | 567,500 | $139.2B | 5.36% | |
| 2 | MDGLMADRIGAL PHARMACEUTICALS INC | 342,300 | $95.7B | 3.68% | |
| 3 | ISRGINTUITIVE SURGICAL INC | 141,900 | $67.9B | 2.61% | |
| 4 | NBIXNEUROCRINE BIOSCIENCES INC | 630,400 | $61.9B | 2.38% | |
| 5 | —GW PHARMACEUTICALS PLC | 440,000 | $61.4B | 2.36% | |
| 6 | ALXNALEXION PHARMACEUTICALS INC | 492,500 | $61.1B | 2.35% | |
| 7 | ABBVABBVIE INC | 600,000 | $55.6B | 2.14% | |
| 8 | WCGEURWELLCARE HEALTH PLANS INC | 223,000 | $54.9B | 2.11% | |
| 9 | MOHMOLINA HEALTHCARE INC | 545,000 | $53.4B | 2.05% | |
| 10 | ACHCACADIA HEALTHCARE COMPANY IN | 1,253,500 | $51.3B | 1.97% | |
| 11 | —LOXO ONCOLOGY INC | 289,900 | $50.3B | 1.94% | |
| 12 | —SPARK THERAPEUTICS INC | 544,000 | $45.0B | 1.73% | |
| 13 | HCAHCA HEALTHCARE INC | 430,000 | $44.1B | 1.70% | |
| 14 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,650,000 | $39.4B | 1.51% | |
| 15 | SRPTSAREPTA THERAPEUTICS INC | 297,500 | $39.3B | 1.51% | |
| 16 | IRTCIRHYTHM TECHNOLOGIES INC | 480,000 | $38.9B | 1.50% | |
| 17 | PCRXPACIRA PHARMACEUTICALS INC | 1,198,000 | $38.4B | 1.48% | |
| 18 | —RADIUS HEALTH INC | 1,125,000 | $33.2B | 1.28% | |
| 19 | ONCBEIGENE LTD | 215,000 | $33.1B | 1.27% | |
| 20 | PENPENUMBRA INC | 236,750 | $32.7B | 1.26% | |
| 21 | VRTXVERTEX PHARMACEUTICALS INC | 190,500 | $32.4B | 1.25% | |
| 22 | EHCENCOMPASS HEALTH CORP | 450,000 | $30.5B | 1.17% | |
| 23 | SYKSTRYKER CORP | 178,000 | $30.1B | 1.16% | |
| 24 | CELGCELGENE CORP | 360,400 | $28.6B | 1.10% | |
| 25 | DVADAVITA INC | 408,500 | $28.4B | 1.09% | |
| 26 | PBYIPUMA BIOTECHNOLOGY INC | 475,800 | $28.1B | 1.08% | |
| 27 | —TESARO INC | 625,400 | $27.8B | 1.07% | |
| 28 | AXGNAXOGEN INC | 545,000 | $27.4B | 1.05% | |
| 29 | PRAHPRA HEALTH SCIENCES INC | 288,247 | $26.9B | 1.04% | |
| 30 | —WRIGHT MED GROUP N V | 1,000,000 | $26.0B | 1.00% | |
| 31 | GILDGILEAD SCIENCES INC | 365,000 | $25.9B | 0.99% | |
| 32 | —MEDICINES CO | 690,000 | $25.3B | 0.97% | |
| 33 | TFXTELEFLEX INC | 92,500 | $24.8B | 0.95% | |
| 34 | —ALDER BIOPHARMACEUTICALS INC | 1,565,000 | $24.7B | 0.95% | |
| 35 | EWEDWARDS LIFESCIENCES CORP | 165,000 | $24.0B | 0.92% | |
| 36 | EXASEXACT SCIENCES CORP | 380,000 | $22.7B | 0.87% | |
| 37 | AFWALIGN TECHNOLOGY INC | 66,000 | $22.6B | 0.87% | |
| 38 | INGNINOGEN INC | 119,000 | $22.2B | 0.85% | |
| 39 | BAXBAXTER INTL INC | 297,000 | $21.9B | 0.84% | |
| 40 | HRTXHERON THERAPEUTICS INC | 525,000 | $20.4B | 0.78% | |
| 41 | TMOTHERMO FISHER SCIENTIFIC INC | 96,000 | $19.9B | 0.77% | |
| 42 | INCYINCYTE CORP | 296,000 | $19.8B | 0.76% | |
| 43 | IM8NINSMED INC | 825,000 | $19.5B | 0.75% | |
| 44 | NUVAGBPNUVASIVE INC | 372,500 | $19.4B | 0.75% | |
| 45 | FGENEURFIBROGEN INC | 307,000 | $19.2B | 0.74% | |
| 46 | ABGAMERISOURCEBERGEN CORP | 220,000 | $18.8B | 0.72% | |
| 47 | ZBHZIMMER BIOMET HLDGS INC | 161,000 | $17.9B | 0.69% | |
| 48 | —MERSANA THERAPEUTICS INC | 1,000,000 | $17.9B | 0.69% | |
| 49 | ASMBASSEMBLY BIOSCIENCES INC | 450,000 | $17.6B | 0.68% | |
| 50 | ACRSACLARIS THERAPEUTICS INC | 856,000 | $17.1B | 0.66% | |
| 51 | ALNYALNYLAM PHARMACEUTICALS INC | 173,500 | $17.1B | 0.66% | |
| 52 | GLPGGALAPAGOS NV | 185,000 | $17.1B | 0.66% | |
| 53 | —OBSEVA SA | 1,120,000 | $17.0B | 0.65% | |
| 54 | JAZZJAZZ PHARMACEUTICALS PLC | 98,000 | $16.9B | 0.65% | |
| 55 | —EPIZYME INC | 1,241,253 | $16.8B | 0.65% | |
| 56 | —AUDENTES THERAPEUTICS INC | 440,000 | $16.8B | 0.65% | |
| 57 | ARNAEURARENA PHARMACEUTICALS INC | 375,000 | $16.4B | 0.63% | |
| 58 | ASNDASCENDIS PHARMA A S | 243,500 | $16.2B | 0.62% | |
| 59 | HOLXHOLOGIC INC | 400,000 | $15.9B | 0.61% | |
| 60 | WSTWEST PHARMACEUTICAL SVSC INC | 160,000 | $15.9B | 0.61% | |
| 61 | —BIOHAVEN PHARMACTL HLDG CO L | 397,500 | $15.7B | 0.60% | |
| 62 | IDXXIDEXX LABS INC | 72,000 | $15.7B | 0.60% | |
| 63 | AM6AMICUS THERAPEUTICS INC | 1,000,000 | $15.6B | 0.60% | |
| 64 | BIIBBIOGEN INC | 53,000 | $15.4B | 0.59% | |
| 65 | RAREULTRAGENYX PHARMACEUTICAL IN | 200,000 | $15.4B | 0.59% | |
| 66 | —INTERSECT ENT INC | 410,000 | $15.4B | 0.59% | |
| 67 | TBPHTHERAVANCE BIOPHARMA INC | 652,600 | $14.8B | 0.57% | |
| 68 | GTHXEURG1 THERAPEUTICS INC | 300,000 | $13.0B | 0.50% | |
| 69 | EX9EXELIXIS INC | 595,000 | $12.8B | 0.49% | |
| 70 | —TRANSLATE BIO INC | 1,011,079 | $12.8B | 0.49% | |
| 71 | 2L9BLUEPRINT MEDICINES CORP | 199,000 | $12.6B | 0.49% | |
| 72 | AMRNAMARIN CORP PLC | 4,000,000 | $12.4B | 0.48% | |
| 73 | —PORTOLA PHARMACEUTICALS INC | 323,800 | $12.2B | 0.47% | |
| 74 | —IMMUNOMEDICS INC | 500,000 | $11.8B | 0.46% | |
| 75 | MRTXEURMIRATI THERAPEUTICS INC | 240,000 | $11.8B | 0.46% | |
| 76 | BMRNBIOMARIN PHARMACEUTICAL INC | 125,000 | $11.8B | 0.45% | |
| 77 | CLVSEURCLOVIS ONCOLOGY INC | 255,000 | $11.6B | 0.45% | |
| 78 | RIGLUSDRIGEL PHARMACEUTICALS INC | 3,950,000 | $11.2B | 0.43% | |
| 79 | —RETROPHIN INC | 400,000 | $10.9B | 0.42% | |
| 80 | ARGXARGENX SE | 128,750 | $10.7B | 0.41% | |
| 81 | ANABANAPTYSBIO INC | 150,000 | $10.7B | 0.41% | |
| 82 | CLSDUSDCLEARSIDE BIOMEDICAL INC | 975,000 | $10.4B | 0.40% | |
| 83 | NVTA1EURINVITAE CORP | 1,400,000 | $10.3B | 0.40% | |
| 84 | AG8AGILENT TECHNOLOGIES INC | 163,700 | $10.1B | 0.39% | |
| 85 | —ZOGENIX INC | 226,000 | $10.0B | 0.38% | |
| 86 | CHRSCOHERUS BIOSCIENCES INC | 690,000 | $9.7B | 0.37% | |
| 87 | FIXXEURHOMOLOGY MEDICINES INC | 470,000 | $9.6B | 0.37% | |
| 88 | —FIVE PRIME THERAPEUTICS INC | 593,000 | $9.4B | 0.36% | |
| 89 | ARDXARDELYX INC | 2,525,557 | $9.3B | 0.36% | |
| 90 | —ENDOCYTE INC | 675,000 | $9.3B | 0.36% | |
| 91 | —MOMENTA PHARMACEUTICALS INC | 452,500 | $9.3B | 0.36% | |
| 92 | —RTI SURGICAL INC | 1,950,000 | $9.0B | 0.35% | |
| 93 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 750,000 | $8.9B | 0.34% | |
| 94 | —ODONATE THERAPEUTICS INC | 397,750 | $8.8B | 0.34% | |
| 95 | —GLOBAL CORD BLOOD CORPORATIO | 880,000 | $8.4B | 0.32% | |
| 96 | —APTINYX INC | 340,000 | $8.2B | 0.32% | |
| 97 | CBAYUSDCYMABAY THERAPEUTICS INC | 580,000 | $7.8B | 0.30% | |
| 98 | SPROSPERO THERAPEUTICS INC | 525,000 | $7.7B | 0.30% | |
| 99 | SG7SAGE THERAPEUTICS INC | 49,000 | $7.7B | 0.30% | |
| 100 | —RA PHARMACEUTICALS INC | 750,000 | $7.5B | 0.29% |
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