Rock Springs Capital Management LP Q4 2018 Filing
Filed February 14, 2019
Portfolio Value
$2.1T
Holdings
133
Report Date
Q4 2018
Filing Type
13F-HR
All Holdings (133 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | UNHUNITEDHEALTH GROUP INC | 603,100 | $150.2B | 7.09% | |
| 2 | WCGEURWELLCARE HEALTH PLANS INC | 389,500 | $92.0B | 4.34% | |
| 3 | ISRGINTUITIVE SURGICAL INC | 152,000 | $72.8B | 3.44% | |
| 4 | AMRNAMARIN CORP PLC | 4,476,000 | $60.9B | 2.88% | |
| 5 | —GW PHARMACEUTICALS PLC | 599,500 | $58.4B | 2.76% | |
| 6 | HCAHCA HEALTHCARE INC | 455,000 | $56.6B | 2.67% | |
| 7 | NBIXNEUROCRINE BIOSCIENCES INC | 788,600 | $56.3B | 2.66% | |
| 8 | PCRXPACIRA PHARMACEUTICALS INC | 1,250,000 | $53.8B | 2.54% | |
| 9 | EHCENCOMPASS HEALTH CORP | 725,000 | $44.7B | 2.11% | |
| 10 | —TESARO INC | 601,700 | $44.7B | 2.11% | |
| 11 | MOHMOLINA HEALTHCARE INC | 342,000 | $39.7B | 1.88% | |
| 12 | SRPTSAREPTA THERAPEUTICS INC | 327,000 | $35.7B | 1.68% | |
| 13 | —LOXO ONCOLOGY INC | 241,500 | $33.8B | 1.60% | |
| 14 | VRTXVERTEX PHARMACEUTICALS INC | 203,000 | $33.6B | 1.59% | |
| 15 | TFXTELEFLEX INC | 130,000 | $33.6B | 1.59% | |
| 16 | IRTCIRHYTHM TECHNOLOGIES INC | 482,000 | $33.5B | 1.58% | |
| 17 | BSXBOSTON SCIENTIFIC CORP | 915,000 | $32.3B | 1.53% | |
| 18 | ONCBEIGENE LTD | 214,800 | $30.1B | 1.42% | |
| 19 | EWEDWARDS LIFESCIENCES CORP | 183,500 | $28.1B | 1.33% | |
| 20 | SYKSTRYKER CORP | 179,000 | $28.1B | 1.32% | |
| 21 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,605,105 | $27.6B | 1.30% | |
| 22 | PENPENUMBRA INC | 225,000 | $27.5B | 1.30% | |
| 23 | —WRIGHT MED GROUP N V | 1,000,000 | $27.2B | 1.28% | |
| 24 | MDGLMADRIGAL PHARMACEUTICALS INC | 241,000 | $27.2B | 1.28% | |
| 25 | EXASEXACT SCIENCES CORP | 385,000 | $24.3B | 1.15% | |
| 26 | ALXNALEXION PHARMACEUTICALS INC | 242,500 | $23.6B | 1.11% | |
| 27 | ACHCACADIA HEALTHCARE COMPANY IN | 900,750 | $23.2B | 1.09% | |
| 28 | AFWALIGN TECHNOLOGY INC | 105,000 | $22.0B | 1.04% | |
| 29 | TMOTHERMO FISHER SCIENTIFIC INC | 96,000 | $21.5B | 1.01% | |
| 30 | ALLKGUSDALLAKOS INC | 404,000 | $21.1B | 1.00% | |
| 31 | —SPARK THERAPEUTICS INC | 537,500 | $21.0B | 0.99% | |
| 32 | IDXXIDEXX LABS INC | 110,500 | $20.6B | 0.97% | |
| 33 | BAXBAXTER INTL INC | 300,700 | $19.8B | 0.93% | |
| 34 | INCYINCYTE CORP | 310,000 | $19.7B | 0.93% | |
| 35 | RAREULTRAGENYX PHARMACEUTICAL IN | 425,000 | $18.5B | 0.87% | |
| 36 | PRAHPRA HEALTH SCIENCES INC | 200,000 | $18.4B | 0.87% | |
| 37 | —RADIUS HEALTH INC | 1,100,000 | $18.1B | 0.86% | |
| 38 | ARGXARGENX SE | 178,000 | $17.1B | 0.81% | |
| 39 | GLPGGALAPAGOS NV | 177,500 | $16.3B | 0.77% | |
| 40 | WSTWEST PHARMACEUTICAL SVSC INC | 160,000 | $15.7B | 0.74% | |
| 41 | NVTA1EURINVITAE CORP | 1,400,000 | $15.5B | 0.73% | |
| 42 | ASNDASCENDIS PHARMA A S | 243,500 | $15.3B | 0.72% | |
| 43 | —ALDER BIOPHARMACEUTICALS INC | 1,475,000 | $15.1B | 0.71% | |
| 44 | BIIBBIOGEN INC | 50,000 | $15.0B | 0.71% | |
| 45 | INGNINOGEN INC | 117,000 | $14.5B | 0.69% | |
| 46 | —OBSEVA SA | 1,120,000 | $14.2B | 0.67% | |
| 47 | FGENEURFIBROGEN INC | 306,000 | $14.2B | 0.67% | |
| 48 | ALNYALNYLAM PHARMACEUTICALS INC | 194,000 | $14.1B | 0.67% | |
| 49 | TBPHTHERAVANCE BIOPHARMA INC | 550,000 | $14.1B | 0.66% | |
| 50 | —MEDICINES CO | 726,900 | $13.9B | 0.66% | |
| 51 | —RA PHARMACEUTICALS INC | 750,000 | $13.7B | 0.64% | |
| 52 | HRTXHERON THERAPEUTICS INC | 525,000 | $13.6B | 0.64% | |
| 53 | —INTERSECT ENT INC | 465,000 | $13.1B | 0.62% | |
| 54 | AXGNAXOGEN INC | 603,970 | $12.3B | 0.58% | |
| 55 | AG8AGILENT TECHNOLOGIES INC | 182,800 | $12.3B | 0.58% | |
| 56 | EX9EXELIXIS INC | 621,400 | $12.2B | 0.58% | |
| 57 | ZBHZIMMER BIOMET HLDGS INC | 117,500 | $12.2B | 0.58% | |
| 58 | CELGCELGENE CORP | 185,150 | $11.9B | 0.56% | |
| 59 | 2L9BLUEPRINT MEDICINES CORP | 213,658 | $11.5B | 0.54% | |
| 60 | SGENEURSEATTLE GENETICS INC | 202,500 | $11.5B | 0.54% | |
| 61 | IM8NINSMED INC | 850,000 | $11.2B | 0.53% | |
| 62 | —IMMUNOMEDICS INC | 780,000 | $11.1B | 0.53% | |
| 63 | DVADAVITA INC | 215,200 | $11.1B | 0.52% | |
| 64 | BMRNBIOMARIN PHARMACEUTICAL INC | 129,000 | $11.0B | 0.52% | |
| 65 | —AUDENTES THERAPEUTICS INC | 500,000 | $10.7B | 0.50% | |
| 66 | ASMBASSEMBLY BIOSCIENCES INC | 450,000 | $10.2B | 0.48% | |
| 67 | FIXXEURHOMOLOGY MEDICINES INC | 450,000 | $10.1B | 0.47% | |
| 68 | GBTUSDGLOBAL BLOOD THERAPEUTICS IN | 245,000 | $10.1B | 0.47% | |
| 69 | —EPIZYME INC | 1,607,500 | $9.9B | 0.47% | |
| 70 | ACRSACLARIS THERAPEUTICS INC | 1,329,400 | $9.8B | 0.46% | |
| 71 | RIGLUSDRIGEL PHARMACEUTICALS INC | 4,200,000 | $9.7B | 0.46% | |
| 72 | —BIOHAVEN PHARMACTL HLDG CO L | 260,000 | $9.6B | 0.45% | |
| 73 | AM6AMICUS THERAPEUTICS INC | 1,000,000 | $9.6B | 0.45% | |
| 74 | PBYIPUMA BIOTECHNOLOGY INC | 456,462 | $9.3B | 0.44% | |
| 75 | —RETROPHIN INC | 400,000 | $9.1B | 0.43% | |
| 76 | ANABANAPTYSBIO INC | 136,000 | $8.7B | 0.41% | |
| 77 | —ZOGENIX INC | 235,000 | $8.6B | 0.40% | |
| 78 | ZLABZAI LAB LTD | 350,000 | $8.1B | 0.38% | |
| 79 | GHGUARDANT HEALTH INC | 216,000 | $8.1B | 0.38% | |
| 80 | IFRXINFLARX NV | 217,900 | $7.9B | 0.37% | |
| 81 | —TRANSLATE BIO INC | 1,009,179 | $7.6B | 0.36% | |
| 82 | FRPTFRESHPET INC | 235,000 | $7.6B | 0.36% | |
| 83 | —RTI SURGICAL INC | 1,950,000 | $7.2B | 0.34% | |
| 84 | NVCRNOVOCURE LTD | 195,000 | $6.5B | 0.31% | |
| 85 | MRTXEURMIRATI THERAPEUTICS INC | 150,000 | $6.4B | 0.30% | |
| 86 | —ODONATE THERAPEUTICS INC | 445,000 | $6.3B | 0.30% | |
| 87 | CHRSCOHERUS BIOSCIENCES INC | 670,000 | $6.1B | 0.29% | |
| 88 | AXNX*AXONICS MODULATION TECH INC | 400,000 | $6.0B | 0.29% | |
| 89 | NVAXNOVAVAX INC | 3,250,000 | $6.0B | 0.28% | |
| 90 | —GLOBAL CORD BLOOD CORPORATIO | 925,000 | $6.0B | 0.28% | |
| 91 | —PORTOLA PHARMACEUTICALS INC | 300,000 | $5.9B | 0.28% | |
| 92 | RYTMRHYTHM PHARMACEUTICALS INC | 216,500 | $5.8B | 0.27% | |
| 93 | —MYOVANT SCIENCES LTD | 347,500 | $5.7B | 0.27% | |
| 94 | BCRXBIOCRYST PHARMACEUTICALS | 700,000 | $5.6B | 0.27% | |
| 95 | —APTINYX INC | 305,000 | $5.0B | 0.24% | |
| 96 | AGLEUSDAEGLEA BIOTHERAPEUTICS INC | 650,000 | $4.9B | 0.23% | |
| 97 | CBAYUSDCYMABAY THERAPEUTICS INC | 613,604 | $4.8B | 0.23% | |
| 98 | —FIVE PRIME THERAPEUTICS INC | 505,000 | $4.7B | 0.22% | |
| 99 | SG7SAGE THERAPEUTICS INC | 49,000 | $4.7B | 0.22% | |
| 100 | CLVSEURCLOVIS ONCOLOGY INC | 256,000 | $4.6B | 0.22% |
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