Rock Springs Capital Management LP Q4 2020 Filing
Filed February 16, 2021
Portfolio Value
$4.7T
Holdings
154
Report Date
Q4 2020
Filing Type
13F-HR
All Holdings (154 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | NBIXNEUROCRINE BIOSCIENCES INC | 1,575,000 | $151.0B | 3.20% | |
| 2 | IRTCIRHYTHM TECHNOLOGIES INC | 625,000 | $148.3B | 3.14% | |
| 3 | UNHUNITEDHEALTH GROUP INC | 405,000 | $142.0B | 3.01% | |
| 4 | HUMHUMANA INC | 285,000 | $116.9B | 2.48% | |
| 5 | ZLABZAI LAB LTD | 854,899 | $115.7B | 2.45% | |
| 6 | AGIOAGIOS PHARMACEUTICALS INC | 2,523,521 | $109.3B | 2.32% | |
| 7 | ISRGINTUITIVE SURGICAL INC | 120,000 | $98.2B | 2.08% | |
| 8 | 2L9BLUEPRINT MEDICINES CORP | 842,000 | $94.4B | 2.00% | |
| 9 | AFWALIGN TECHNOLOGY INC | 163,500 | $87.4B | 1.85% | |
| 10 | ACADACADIA PHARMACEUTICALS INC | 1,612,500 | $86.2B | 1.83% | |
| 11 | ARGXARGENX SE | 287,500 | $84.6B | 1.79% | |
| 12 | MRTXEURMIRATI THERAPEUTICS INC | 373,152 | $82.0B | 1.74% | |
| 13 | PODDINSULET CORP | 318,000 | $81.3B | 1.72% | |
| 14 | RAREULTRAGENYX PHARMACEUTICAL IN | 566,500 | $78.4B | 1.66% | |
| 15 | NVTA1EURINVITAE CORP | 1,852,067 | $77.4B | 1.64% | |
| 16 | HCAHCA HEALTHCARE INC | 450,000 | $74.0B | 1.57% | |
| 17 | FRPTFRESHPET INC | 506,500 | $71.9B | 1.52% | |
| 18 | AVIRATEA PHARMACEUTICALS INC | 1,697,403 | $70.9B | 1.50% | |
| 19 | NVROEURNEVRO CORP | 395,000 | $68.4B | 1.45% | |
| 20 | EXASEXACT SCIENCES CORP | 485,000 | $64.3B | 1.36% | |
| 21 | ARVNARVINAS INC | 746,000 | $63.4B | 1.34% | |
| 22 | NVV1NOVAVAX INC | 563,205 | $62.8B | 1.33% | |
| 23 | IDXXIDEXX LABS INC | 125,000 | $62.5B | 1.32% | |
| 24 | PCRXPACIRA BIOSCIENCES INC | 1,025,000 | $61.3B | 1.30% | |
| 25 | ONCBEIGENE LTD | 225,000 | $58.1B | 1.23% | |
| 26 | BIIBBIOGEN INC | 230,000 | $56.3B | 1.19% | Call |
| 27 | SRPTSAREPTA THERAPEUTICS INC | 328,750 | $56.0B | 1.19% | |
| 28 | —MERSANA THERAPEUTICS INC | 2,063,667 | $54.9B | 1.16% | |
| 29 | TFXTELEFLEX INCORPORATED | 130,000 | $53.5B | 1.13% | |
| 30 | EWEDWARDS LIFESCIENCES CORP | 582,000 | $53.1B | 1.13% | |
| 31 | ALXNALEXION PHARMACEUTICALS INC | 306,750 | $47.9B | 1.02% | |
| 32 | ALLKGUSDALLAKOS INC | 341,500 | $47.8B | 1.01% | |
| 33 | PHRPHREESIA INC | 850,000 | $46.1B | 0.98% | |
| 34 | HZNPHORIZON THERAPEUTICS PUB L | 625,000 | $45.7B | 0.97% | |
| 35 | KYMRKYMERA THERAPEUTICS INC | 713,865 | $44.3B | 0.94% | |
| 36 | CNCCENTENE CORP DEL | 730,000 | $43.8B | 0.93% | |
| 37 | SGENUSDSEAGEN INC | 250,000 | $43.8B | 0.93% | |
| 38 | ALNYALNYLAM PHARMACEUTICALS INC | 335,000 | $43.5B | 0.92% | |
| 39 | EHCENCOMPASS HEALTH CORP | 500,000 | $41.3B | 0.88% | |
| 40 | IMVTIMMUNOVANT INC | 891,000 | $41.2B | 0.87% | |
| 41 | —EARGO INC | 900,000 | $40.3B | 0.86% | |
| 42 | INSPINSPIRE MED SYS INC | 213,350 | $40.1B | 0.85% | |
| 43 | SPRBSPRUCE BIOSCIENCES INC | 1,631,000 | $39.6B | 0.84% | |
| 44 | ASNDASCENDIS PHARMA A/S | 233,500 | $38.9B | 0.83% | |
| 45 | ADPTADAPTIVE BIOTECHNOLOGIES COR | 635,000 | $37.5B | 0.80% | |
| 46 | CVETUSDCOVETRUS INC | 1,285,000 | $36.9B | 0.78% | |
| 47 | ACHCACADIA HEALTHCARE COMPANY IN | 700,000 | $35.2B | 0.75% | |
| 48 | LUNGPULMONX CORP | 500,000 | $34.5B | 0.73% | |
| 49 | HCATHEALTH CATALYST INC | 785,000 | $34.2B | 0.72% | |
| 50 | ARDXARDELYX INC | 5,148,112 | $33.3B | 0.71% | |
| 51 | NKTXNKARTA INC | 541,000 | $33.3B | 0.71% | |
| 52 | NVCRNOVOCURE LTD | 175,000 | $30.3B | 0.64% | |
| 53 | —ATHIRA PHARMA INC | 860,902 | $29.5B | 0.63% | |
| 54 | BSXBOSTON SCIENTIFIC CORP | 800,000 | $28.8B | 0.61% | |
| 55 | BFAMBRIGHT HORIZONS FAM SOL IN D | 165,500 | $28.6B | 0.61% | |
| 56 | MDGLMADRIGAL PHARMACEUTICALS INC | 256,768 | $28.5B | 0.61% | |
| 57 | TVTXTRAVERE THERAPEUTICS INC | 1,021,000 | $27.8B | 0.59% | |
| 58 | PENPENUMBRA INC | 159,000 | $27.8B | 0.59% | |
| 59 | —EPIZYME INC | 2,553,208 | $27.7B | 0.59% | |
| 60 | MIRMMIRUM PHARMACEUTICALS INC | 1,496,525 | $26.1B | 0.55% | |
| 61 | INCYINCYTE CORP | 300,000 | $26.1B | 0.55% | |
| 62 | PRLDPRELUDE THERAPEUTICS INC | 360,363 | $25.8B | 0.55% | |
| 63 | GHGUARDANT HEALTH INC | 200,000 | $25.8B | 0.55% | |
| 64 | STTKSHATTUCK LABS INC | 489,000 | $25.6B | 0.54% | |
| 65 | TGTXTG THERAPEUTICS INC | 489,000 | $25.4B | 0.54% | |
| 66 | KRTXKARUNA THERAPEUTICS INC | 243,950 | $24.8B | 0.53% | |
| 67 | BAXBAXTER INTL INC | 301,000 | $24.2B | 0.51% | |
| 68 | RPRXROYALTY PHARMA PLC | 480,000 | $24.0B | 0.51% | |
| 69 | SPROSPERO THERAPEUTICS INC | 1,235,000 | $23.9B | 0.51% | |
| 70 | AM6AMICUS THERAPEUTICS INC | 1,029,000 | $23.8B | 0.50% | |
| 71 | OSH3EUROAK STR HEALTH INC | 375,000 | $22.9B | 0.49% | |
| 72 | SWAVUSDSHOCKWAVE MED INC | 220,000 | $22.8B | 0.48% | |
| 73 | BMRNBIOMARIN PHARMACEUTICAL INC | 253,500 | $22.2B | 0.47% | |
| 74 | COLLCOLLEGIUM PHARMACEUTICAL INC | 1,100,000 | $22.0B | 0.47% | |
| 75 | RCKTROCKET PHARMACEUTICALS INC | 400,370 | $22.0B | 0.47% | |
| 76 | ACCDEURACCOLADE INC | 500,000 | $21.8B | 0.46% | |
| 77 | AMRNAMARIN CORP PLC | 4,195,000 | $20.5B | 0.43% | |
| 78 | CHRSCOHERUS BIOSCIENCES INC | 1,162,500 | $20.2B | 0.43% | |
| 79 | —ABCAM PLC | 925,000 | $19.9B | 0.42% | |
| 80 | —PPD INC | 525,000 | $18.0B | 0.38% | |
| 81 | —GAMIDA CELL LTD | 2,094,000 | $17.6B | 0.37% | |
| 82 | ACRSACLARIS THERAPEUTICS INC | 2,676,100 | $17.3B | 0.37% | |
| 83 | CYTK 4 11/15/26CYTOKINETICS INC | 8,000,000 | $17.3B | 0.37% | |
| 84 | INZYINOZYME PHARMA INC | 830,546 | $17.1B | 0.36% | |
| 85 | RLAYRELAY THERAPEUTICS INC | 412,000 | $17.1B | 0.36% | |
| 86 | RIGLUSDRIGEL PHARMACEUTICALS INC | 4,742,891 | $16.6B | 0.35% | |
| 87 | KURAKURA ONCOLOGY INC | 508,116 | $16.6B | 0.35% | |
| 88 | CERE1EURCEREVEL THERAPEUTICS HLDNG I | 999,000 | $16.6B | 0.35% | |
| 89 | GLPGGALAPAGOS NV | 165,000 | $16.3B | 0.35% | |
| 90 | —INTERSECT ENT INC | 700,000 | $16.0B | 0.34% | |
| 91 | TARAPROTARA THERAPEUTICS INC | 643,200 | $15.6B | 0.33% | |
| 92 | RYTMRHYTHM PHARMACEUTICALS INC | 490,339 | $14.6B | 0.31% | |
| 93 | JAZZJAZZ PHARMACEUTICALS PLC | 87,500 | $14.4B | 0.31% | |
| 94 | —MYOVANT SCIENCES LTD | 515,000 | $14.2B | 0.30% | |
| 95 | GOSS 5 06/01/27GOSSAMER BIO INC | 15,573,000 | $14.2B | 0.30% | |
| 96 | APLTAPPLIED THERAPEUTICS INC | 635,837 | $14.0B | 0.30% | |
| 97 | —GW PHARMACEUTICALS PLC | 119,188 | $13.8B | 0.29% | |
| 98 | CGENCOMPUGEN LTD | 1,133,600 | $13.7B | 0.29% | |
| 99 | PRTAPROTHENA CORP PLC | 1,141,100 | $13.7B | 0.29% | |
| 100 | AKROAKERO THERAPEUTICS INC | 515,371 | $13.3B | 0.28% |
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