Rock Springs Capital Management LP Q1 2020 Filing
Filed May 15, 2020
Portfolio Value
$2.4T
Holdings
131
Report Date
Q1 2020
Filing Type
13F-HR
All Holdings (131 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | NBIXNEUROCRINE BIOSCIENCES INC | 1,349,500 | $116.8B | 4.83% | |
| 2 | ISRGINTUITIVE SURGICAL INC | 152,500 | $75.5B | 3.12% | |
| 3 | UNHUNITEDHEALTH GROUP INC | 300,000 | $74.8B | 3.09% | |
| 4 | BIIBBIOGEN INC | 180,000 | $56.9B | 2.35% | |
| 5 | IRTCIRHYTHM TECHNOLOGIES INC | 645,000 | $52.5B | 2.17% | |
| 6 | BAXBAXTER INTL INC | 645,000 | $52.4B | 2.17% | |
| 7 | EHCENCOMPASS HEALTH CORP | 815,000 | $52.2B | 2.16% | |
| 8 | HUMHUMANA INC | 157,500 | $49.5B | 2.05% | |
| 9 | PODDINSULET CORP | 292,000 | $48.4B | 2.00% | |
| 10 | HCAHCA HEALTHCARE INC | 520,000 | $46.7B | 1.93% | |
| 11 | CNCCENTENE CORP DEL | 750,000 | $44.6B | 1.84% | |
| 12 | ACADACADIA PHARMACEUTICALS INC | 1,025,000 | $43.3B | 1.79% | |
| 13 | 2L9BLUEPRINT MEDICINES CORP | 737,000 | $43.1B | 1.78% | |
| 14 | —FORTY SEVEN INC | 447,400 | $42.7B | 1.77% | |
| 15 | ALNYALNYLAM PHARMACEUTICALS INC | 381,500 | $41.5B | 1.72% | |
| 16 | ZLABZAI LAB LTD | 750,000 | $38.6B | 1.60% | |
| 17 | TFXTELEFLEX INCORPORATED | 130,000 | $38.1B | 1.57% | |
| 18 | AGIOAGIOS PHARMACEUTICALS INC | 1,055,500 | $37.4B | 1.55% | |
| 19 | EWEDWARDS LIFESCIENCES CORP | 194,000 | $36.6B | 1.51% | |
| 20 | PENPENUMBRA INC | 225,000 | $36.3B | 1.50% | |
| 21 | BSXBOSTON SCIENTIFIC CORP | 1,100,000 | $35.9B | 1.48% | |
| 22 | NVROEURNEVRO CORP | 346,000 | $34.6B | 1.43% | |
| 23 | GLPGGALAPAGOS NV | 175,000 | $34.3B | 1.42% | |
| 24 | SRPTSAREPTA THERAPEUTICS INC | 345,500 | $33.8B | 1.40% | |
| 25 | RAREULTRAGENYX PHARMACEUTICAL IN | 747,800 | $33.2B | 1.37% | |
| 26 | ARGXARGENX SE | 247,500 | $32.6B | 1.35% | |
| 27 | BMRNBIOMARIN PHARMACEUTICAL INC | 380,000 | $32.1B | 1.33% | |
| 28 | CHRSCOHERUS BIOSCIENCES INC | 1,950,000 | $31.6B | 1.31% | |
| 29 | —EPIZYME INC | 1,955,000 | $30.3B | 1.25% | |
| 30 | IDXXIDEXX LABS INC | 125,000 | $30.3B | 1.25% | |
| 31 | PCRXPACIRA BIOSCIENCES | 900,000 | $30.2B | 1.25% | |
| 32 | VRTXVERTEX PHARMACEUTICALS INC | 125,000 | $29.7B | 1.23% | |
| 33 | SGENEURSEATTLE GENETICS INC | 242,000 | $27.9B | 1.15% | |
| 34 | APLTAPPLIED THERAPEUTICS INC | 845,700 | $27.6B | 1.14% | |
| 35 | ARDXARDELYX INC | 4,850,000 | $27.6B | 1.14% | |
| 36 | ONCBEIGENE LTD | 214,800 | $26.4B | 1.09% | |
| 37 | MRTXEURMIRATI THERAPEUTICS INC | 341,500 | $26.3B | 1.09% | |
| 38 | AMGNAMGEN INC | 126,000 | $25.5B | 1.06% | |
| 39 | FRPTFRESHPET INC | 397,500 | $25.4B | 1.05% | |
| 40 | CICIGNA CORP NEW | 141,000 | $25.0B | 1.03% | |
| 41 | EXASEXACT SCIENCES CORP | 424,000 | $24.6B | 1.02% | |
| 42 | ASNDASCENDIS PHARMA A S | 213,500 | $24.0B | 0.99% | |
| 43 | ASMBASSEMBLY BIOSCIENCES INC | 1,500,000 | $22.2B | 0.92% | |
| 44 | AFWALIGN TECHNOLOGY INC | 127,500 | $22.2B | 0.92% | |
| 45 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,175,000 | $19.2B | 0.79% | |
| 46 | QUREUNIQURE NV | 400,000 | $19.0B | 0.78% | |
| 47 | AMRNAMARIN CORP PLC | 4,650,000 | $18.6B | 0.77% | |
| 48 | INCYINCYTE CORP | 250,000 | $18.3B | 0.76% | |
| 49 | MIRMMIRUM PHARMACEUTICALS INC | 1,243,000 | $17.4B | 0.72% | |
| 50 | APREAPREA THERAPEUTICS INC | 500,000 | $17.4B | 0.72% | |
| 51 | TBPHTHERAVANCE BIOPHARMA INC | 750,000 | $17.3B | 0.72% | |
| 52 | MDGLMADRIGAL PHARMACEUTICALS INC | 250,000 | $16.7B | 0.69% | |
| 53 | ACHCACADIA HEALTHCARE COMPANY IN | 900,000 | $16.5B | 0.68% | |
| 54 | NVTA1EURINVITAE CORP | 1,150,000 | $15.7B | 0.65% | |
| 55 | HQYHEALTHEQUITY INC | 305,000 | $15.4B | 0.64% | |
| 56 | ADPTADAPTIVE BIOTECHNOLOGIES COR | 545,000 | $15.1B | 0.63% | |
| 57 | GBTUSDGLOBAL BLOOD THERAPEUTICS IN | 280,000 | $14.3B | 0.59% | |
| 58 | —IMMUNOMEDICS INC | 1,050,000 | $14.2B | 0.59% | |
| 59 | DCPHEURDECIPHERA PHARMACEUTICALS IN | 335,000 | $13.8B | 0.57% | |
| 60 | JNJJOHNSON & JOHNSON | 105,000 | $13.8B | 0.57% | |
| 61 | GHGUARDANT HEALTH INC | 190,000 | $13.2B | 0.55% | |
| 62 | KRTXKARUNA THERAPEUTICS INC | 180,000 | $13.0B | 0.54% | |
| 63 | —RADIUS HEALTH INC | 975,000 | $12.7B | 0.52% | |
| 64 | —PORTOLA PHARMACEUTICALS INC | 1,751,900 | $12.5B | 0.52% | |
| 65 | INSPINSPIRE MED SYS INC | 200,000 | $12.1B | 0.50% | |
| 66 | PHRPHREESIA INC | 565,000 | $11.9B | 0.49% | |
| 67 | —ODONATE THERAPEUTICS INC | 430,000 | $11.9B | 0.49% | |
| 68 | NVCRNOVOCURE LTD | 175,000 | $11.8B | 0.49% | |
| 69 | ARVNARVINAS INC | 285,000 | $11.5B | 0.47% | |
| 70 | HCATHEALTH CATALYST INC | 425,000 | $11.1B | 0.46% | |
| 71 | —MOMENTA PHARMACEUTICALS INC | 400,000 | $10.9B | 0.45% | |
| 72 | WSTWEST PHARMACEUTICAL SVSC INC | 71,000 | $10.8B | 0.45% | |
| 73 | FGENEURFIBROGEN INC | 306,000 | $10.6B | 0.44% | |
| 74 | CYTK 4 11/15/26CYTOKINETICS INC | 8,000,000 | $10.6B | 0.44% | |
| 75 | ALLKGUSDALLAKOS INC | 235,000 | $10.5B | 0.43% | |
| 76 | CNMDCONMED CORP | 180,000 | $10.3B | 0.43% | |
| 77 | —ZOGENIX INC | 400,000 | $9.9B | 0.41% | |
| 78 | AM6AMICUS THERAPEUTICS INC | 1,000,000 | $9.2B | 0.38% | |
| 79 | RIGLUSDRIGEL PHARMACEUTICALS INC | 5,500,000 | $8.6B | 0.35% | |
| 80 | —RETROPHIN INC | 575,000 | $8.4B | 0.35% | |
| 81 | —TRANSLATE BIO INC | 825,000 | $8.2B | 0.34% | |
| 82 | —PPD INC | 450,000 | $8.0B | 0.33% | |
| 83 | CGENCOMPUGEN LTD | 1,100,000 | $8.0B | 0.33% | |
| 84 | —MYOKARDIA INC | 165,000 | $7.7B | 0.32% | |
| 85 | RYTMRHYTHM PHARMACEUTICALS INC | 500,000 | $7.6B | 0.31% | |
| 86 | —CONSTELLATION PHARMCETICLS I | 233,500 | $7.3B | 0.30% | |
| 87 | —MERSANA THERAPEUTICS INC | 1,233,000 | $7.2B | 0.30% | |
| 88 | —IMARA INC | 445,936 | $7.1B | 0.30% | |
| 89 | —BIOHAVEN PHARMACTL HLDG CO L | 200,000 | $6.8B | 0.28% | |
| 90 | FIXXEURHOMOLOGY MEDICINES INC | 425,000 | $6.6B | 0.27% | |
| 91 | —INTERSECT ENT INC | 500,000 | $5.9B | 0.24% | |
| 92 | XENEXENON PHARMACEUTICALS INC | 500,000 | $5.7B | 0.23% | |
| 93 | DVAXDYNAVAX TECHNOLOGIES CORP | 1,575,000 | $5.6B | 0.23% | |
| 94 | PRTAPROTHENA CORP PLC | 500,000 | $5.3B | 0.22% | |
| 95 | INSM 1.75 01/15/25INSMED INC | 6,000,000 | $5.0B | 0.21% | |
| 96 | STAASTAAR SURGICAL CO | 155,000 | $5.0B | 0.21% | |
| 97 | TMOTHERMO FISHER SCIENTIFIC INC | 17,500 | $5.0B | 0.21% | |
| 98 | —CHIASMA INC | 1,350,000 | $4.9B | 0.20% | |
| 99 | SPROSPERO THERAPEUTICS INC | 605,000 | $4.9B | 0.20% | |
| 100 | ALLOALLOGENE THERAPEUTICS INC | 250,000 | $4.9B | 0.20% |
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