Rock Springs Capital Management LP Q3 2018 Filing
Filed November 14, 2018
Portfolio Value
$2.8T
Holdings
144
Report Date
Q3 2018
Filing Type
13F-HR
All Holdings (144 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | UNHUNITEDHEALTH GROUP INC | 589,098 | $156.7B | 5.67% | |
| 2 | ISRGINTUITIVE SURGICAL INC | 141,400 | $81.2B | 2.94% | |
| 3 | MOHMOLINA HEALTHCARE INC | 545,000 | $81.0B | 2.93% | |
| 4 | NBIXNEUROCRINE BIOSCIENCES INC | 645,000 | $79.3B | 2.87% | |
| 5 | WCGEURWELLCARE HEALTH PLANS INC | 235,500 | $75.5B | 2.73% | |
| 6 | MDGLMADRIGAL PHARMACEUTICALS INC | 342,000 | $73.2B | 2.65% | |
| 7 | AMRNAMARIN CORP PLC | 4,325,000 | $70.4B | 2.55% | |
| 8 | —GW PHARMACEUTICALS PLC | 400,000 | $69.1B | 2.50% | |
| 9 | PCRXPACIRA PHARMACEUTICALS INC | 1,292,479 | $63.5B | 2.30% | |
| 10 | HCAHCA HEALTHCARE INC | 455,000 | $63.3B | 2.29% | |
| 11 | EHCENCOMPASS HEALTH CORP | 676,500 | $52.7B | 1.91% | |
| 12 | SRPTSAREPTA THERAPEUTICS INC | 310,500 | $50.1B | 1.82% | |
| 13 | IRTCIRHYTHM TECHNOLOGIES INC | 480,000 | $45.4B | 1.65% | |
| 14 | ALXNALEXION PHARMACEUTICALS INC | 300,000 | $41.7B | 1.51% | |
| 15 | VRTXVERTEX PHARMACEUTICALS INC | 196,000 | $37.8B | 1.37% | |
| 16 | ONCBEIGENE LTD | 215,000 | $37.0B | 1.34% | |
| 17 | PENPENUMBRA INC | 235,200 | $35.2B | 1.27% | |
| 18 | —LOXO ONCOLOGY INC | 202,981 | $34.7B | 1.26% | |
| 19 | TFXTELEFLEX INC | 124,000 | $33.0B | 1.19% | |
| 20 | CELGCELGENE CORP | 360,400 | $32.3B | 1.17% | |
| 21 | SYKSTRYKER CORP | 179,000 | $31.8B | 1.15% | |
| 22 | PRAHPRA HEALTH SCIENCES INC | 288,247 | $31.8B | 1.15% | |
| 23 | EWEDWARDS LIFESCIENCES CORP | 180,000 | $31.3B | 1.13% | |
| 24 | BSXBOSTON SCIENTIFIC CORP | 800,000 | $30.8B | 1.12% | |
| 25 | INGNINOGEN INC | 126,000 | $30.8B | 1.11% | |
| 26 | ABBVABBVIE INC | 325,000 | $30.7B | 1.11% | |
| 27 | EXASEXACT SCIENCES CORP | 385,000 | $30.4B | 1.10% | |
| 28 | ZBHZIMMER BIOMET HLDGS INC | 225,000 | $29.6B | 1.07% | |
| 29 | —SPARK THERAPEUTICS INC | 537,500 | $29.3B | 1.06% | |
| 30 | DVADAVITA INC | 408,500 | $29.3B | 1.06% | |
| 31 | —WRIGHT MED GROUP N V | 1,000,000 | $29.0B | 1.05% | |
| 32 | —TESARO INC | 735,000 | $28.7B | 1.04% | |
| 33 | —ALDER BIOPHARMACEUTICALS INC | 1,632,500 | $27.2B | 0.98% | |
| 34 | AFWALIGN TECHNOLOGY INC | 67,500 | $26.4B | 0.96% | |
| 35 | ACHCACADIA HEALTHCARE COMPANY IN | 700,000 | $24.6B | 0.89% | |
| 36 | INCYINCYTE CORP | 352,100 | $24.3B | 0.88% | |
| 37 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,650,100 | $24.3B | 0.88% | |
| 38 | TMOTHERMO FISHER SCIENTIFIC INC | 96,000 | $23.4B | 0.85% | |
| 39 | NVTA1EURINVITAE CORP | 1,400,000 | $23.4B | 0.85% | |
| 40 | BAXBAXTER INTL INC | 297,000 | $22.9B | 0.83% | |
| 41 | —RADIUS HEALTH INC | 1,267,500 | $22.6B | 0.82% | |
| 42 | PBYIPUMA BIOTECHNOLOGY INC | 487,600 | $22.4B | 0.81% | |
| 43 | IDXXIDEXX LABS INC | 83,500 | $20.8B | 0.75% | |
| 44 | —MEDICINES CO | 690,000 | $20.6B | 0.75% | |
| 45 | —OBSEVA SA | 1,120,000 | $20.2B | 0.73% | |
| 46 | AXGNAXOGEN INC | 543,474 | $20.0B | 0.73% | |
| 47 | GLPGGALAPAGOS NV | 177,500 | $20.0B | 0.72% | |
| 48 | WSTWEST PHARMACEUTICAL SVSC INC | 160,000 | $19.8B | 0.72% | |
| 49 | FGENEURFIBROGEN INC | 306,000 | $18.6B | 0.67% | |
| 50 | ALLKGUSDALLAKOS INC | 405,000 | $18.2B | 0.66% | |
| 51 | ASMBASSEMBLY BIOSCIENCES INC | 490,000 | $18.2B | 0.66% | |
| 52 | IM8NINSMED INC | 890,000 | $18.0B | 0.65% | |
| 53 | TBPHTHERAVANCE BIOPHARMA INC | 550,000 | $18.0B | 0.65% | |
| 54 | BIIBBIOGEN INC | 50,000 | $17.7B | 0.64% | |
| 55 | ARNAEURARENA PHARMACEUTICALS INC | 375,000 | $17.3B | 0.62% | |
| 56 | ASNDASCENDIS PHARMA A S | 243,500 | $17.3B | 0.62% | |
| 57 | ALNYALNYLAM PHARMACEUTICALS INC | 196,500 | $17.2B | 0.62% | |
| 58 | —AUDENTES THERAPEUTICS INC | 425,025 | $16.8B | 0.61% | |
| 59 | HRTXHERON THERAPEUTICS INC | 525,000 | $16.6B | 0.60% | |
| 60 | ANABANAPTYSBIO INC | 165,000 | $16.5B | 0.60% | |
| 61 | —IMMUNOMEDICS INC | 775,000 | $16.1B | 0.58% | |
| 62 | 2L9BLUEPRINT MEDICINES CORP | 200,000 | $15.6B | 0.57% | |
| 63 | RAREULTRAGENYX PHARMACEUTICAL IN | 200,000 | $15.3B | 0.55% | |
| 64 | —ENDOCYTE INC | 850,000 | $15.1B | 0.55% | |
| 65 | —RA PHARMACEUTICALS INC | 750,000 | $13.6B | 0.49% | |
| 66 | RIGLUSDRIGEL PHARMACEUTICALS INC | 4,125,000 | $13.2B | 0.48% | |
| 67 | —INTERSECT ENT INC | 460,000 | $13.2B | 0.48% | |
| 68 | —EPIZYME INC | 1,241,253 | $13.2B | 0.48% | |
| 69 | ELANELANCO ANIMAL HEALTH INC | 375,000 | $13.1B | 0.47% | |
| 70 | ACRSACLARIS THERAPEUTICS INC | 880,000 | $12.8B | 0.46% | |
| 71 | ARGXARGENX SE | 165,000 | $12.5B | 0.45% | |
| 72 | —MOMENTA PHARMACEUTICALS INC | 475,000 | $12.5B | 0.45% | |
| 73 | GTHXEURG1 THERAPEUTICS INC | 233,073 | $12.2B | 0.44% | |
| 74 | BMRNBIOMARIN PHARMACEUTICAL INC | 125,000 | $12.1B | 0.44% | |
| 75 | AM6AMICUS THERAPEUTICS INC | 1,000,000 | $12.1B | 0.44% | |
| 76 | —ZOGENIX INC | 235,000 | $11.7B | 0.42% | |
| 77 | AG8AGILENT TECHNOLOGIES INC | 164,100 | $11.6B | 0.42% | |
| 78 | —RETROPHIN INC | 400,000 | $11.5B | 0.42% | |
| 79 | MRTXEURMIRATI THERAPEUTICS INC | 240,000 | $11.3B | 0.41% | |
| 80 | CHRSCOHERUS BIOSCIENCES INC | 670,000 | $11.1B | 0.40% | |
| 81 | ARDXARDELYX INC | 2,525,557 | $11.0B | 0.40% | |
| 82 | FIXXEURHOMOLOGY MEDICINES INC | 470,000 | $10.7B | 0.39% | |
| 83 | EX9EXELIXIS INC | 595,000 | $10.5B | 0.38% | |
| 84 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 750,000 | $10.2B | 0.37% | |
| 85 | —TRANSLATE BIO INC | 1,009,179 | $10.1B | 0.37% | |
| 86 | —MERSANA THERAPEUTICS INC | 1,000,000 | $10.0B | 0.36% | |
| 87 | —BIOHAVEN PHARMACTL HLDG CO L | 260,000 | $9.8B | 0.35% | |
| 88 | —MYOVANT SCIENCES LTD | 347,500 | $9.2B | 0.33% | |
| 89 | —APTINYX INC | 305,000 | $8.8B | 0.32% | |
| 90 | —ACHILLION PHARMACEUTICALS IN | 2,400,000 | $8.8B | 0.32% | |
| 91 | —RTI SURGICAL INC | 1,950,000 | $8.8B | 0.32% | |
| 92 | —PORTOLA PHARMACEUTICALS INC | 323,800 | $8.6B | 0.31% | |
| 93 | —ODONATE THERAPEUTICS INC | 435,500 | $8.5B | 0.31% | |
| 94 | —FIVE PRIME THERAPEUTICS INC | 598,000 | $8.3B | 0.30% | |
| 95 | CLVSEURCLOVIS ONCOLOGY INC | 271,100 | $8.0B | 0.29% | |
| 96 | ENTAENANTA PHARMACEUTICALS INC | 92,500 | $7.9B | 0.29% | |
| 97 | —BLUEBIRD BIO INC | 52,500 | $7.7B | 0.28% | |
| 98 | KURAKURA ONCOLOGY INC | 405,000 | $7.1B | 0.26% | |
| 99 | SG7SAGE THERAPEUTICS INC | 49,000 | $6.9B | 0.25% | |
| 100 | ZLABZAI LAB LTD | 350,000 | $6.8B | 0.25% |
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