Rock Springs Capital Management LP Q1 2021 Filing
Filed May 17, 2021
Portfolio Value
$4.6T
Holdings
151
Report Date
Q1 2021
Filing Type
13F-HR
All Holdings (151 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | AGIOAGIOS PHARMACEUTICALS INC | 2,543,600 | $131.4B | 2.87% | |
| 2 | HUMHUMANA INC | 301,000 | $126.2B | 2.75% | |
| 3 | ZLABZAI LAB LTD | 933,500 | $124.6B | 2.72% | |
| 4 | AVIRATEA PHARMACEUTICALS INC | 1,694,903 | $104.7B | 2.28% | |
| 5 | UNHUNITEDHEALTH GROUP INC | 275,000 | $102.3B | 2.23% | |
| 6 | —FIVE PRIME THERAPEUTICS INC | 2,660,822 | $100.2B | 2.19% | |
| 7 | NBIXNEUROCRINE BIOSCIENCES INC | 1,015,000 | $98.7B | 2.15% | |
| 8 | IMCRIMMUNOCORE HLDGS PLC | 2,292,285 | $97.6B | 2.13% | |
| 9 | PODDINSULET CORP | 371,000 | $96.8B | 2.11% | |
| 10 | AFWALIGN TECHNOLOGY INC | 177,500 | $96.1B | 2.10% | |
| 11 | ACRSACLARIS THERAPEUTICS INC | 3,569,192 | $89.9B | 1.96% | |
| 12 | ISRGINTUITIVE SURGICAL INC | 120,000 | $88.7B | 1.93% | |
| 13 | IDXXIDEXX LABS INC | 180,000 | $88.1B | 1.92% | |
| 14 | HCAHCA HEALTHCARE INC | 450,000 | $84.8B | 1.85% | |
| 15 | NVTA1EURINVITAE CORP | 2,213,977 | $84.6B | 1.85% | |
| 16 | NVV1NOVAVAX INC | 461,000 | $83.6B | 1.82% | |
| 17 | ARGXARGENX SE | 300,000 | $82.6B | 1.80% | |
| 18 | FRPTFRESHPET INC | 506,500 | $80.4B | 1.75% | |
| 19 | EXASEXACT SCIENCES CORP | 570,000 | $75.1B | 1.64% | |
| 20 | 2L9BLUEPRINT MEDICINES CORP | 746,732 | $72.6B | 1.58% | |
| 21 | PCRXPACIRA BIOSCIENCES INC | 1,025,000 | $71.8B | 1.57% | |
| 22 | ONCBEIGENE LTD | 200,000 | $69.6B | 1.52% | |
| 23 | NVROEURNEVRO CORP | 485,000 | $67.7B | 1.48% | |
| 24 | IRTCIRHYTHM TECHNOLOGIES INC | 432,496 | $60.1B | 1.31% | |
| 25 | HZNPHORIZON THERAPEUTICS PUB L | 625,000 | $57.5B | 1.25% | |
| 26 | MRTXEURMIRATI THERAPEUTICS INC | 323,647 | $55.4B | 1.21% | |
| 27 | TFXTELEFLEX INCORPORATED | 130,000 | $54.0B | 1.18% | |
| 28 | BOLT1EURBOLT BIOTHERAPEUTICS INC | 1,559,248 | $51.3B | 1.12% | |
| 29 | RAREULTRAGENYX PHARMACEUTICAL IN | 450,000 | $51.2B | 1.12% | |
| 30 | EWEDWARDS LIFESCIENCES CORP | 582,000 | $48.7B | 1.06% | |
| 31 | —MERSANA THERAPEUTICS INC | 2,775,127 | $44.9B | 0.98% | |
| 32 | CGEMCULLINAN ONCOLOGY INC | 1,075,912 | $44.8B | 0.98% | |
| 33 | KRTXKARUNA THERAPEUTICS INC | 368,764 | $44.3B | 0.97% | |
| 34 | PHRPHREESIA INC | 850,000 | $44.3B | 0.97% | |
| 35 | —EARGO INC | 851,671 | $42.5B | 0.93% | |
| 36 | ALNYALNYLAM PHARMACEUTICALS INC | 300,000 | $42.4B | 0.92% | |
| 37 | CVETUSDCOVETRUS INC | 1,400,000 | $42.0B | 0.92% | |
| 38 | ARVNARVINAS INC | 621,800 | $41.1B | 0.90% | |
| 39 | EHCENCOMPASS HEALTH CORP | 500,000 | $41.0B | 0.89% | |
| 40 | ACHCACADIA HEALTHCARE COMPANY IN | 700,000 | $40.0B | 0.87% | |
| 41 | PENPENUMBRA INC | 147,500 | $39.9B | 0.87% | |
| 42 | TVTXTRAVERE THERAPEUTICS INC | 1,475,564 | $36.8B | 0.80% | |
| 43 | HCATHEALTH CATALYST INC | 785,000 | $36.7B | 0.80% | |
| 44 | ALLKGUSDALLAKOS INC | 305,706 | $35.1B | 0.77% | |
| 45 | SGENUSDSEAGEN INC | 250,000 | $34.7B | 0.76% | |
| 46 | ARDXARDELYX INC | 5,176,561 | $34.3B | 0.75% | |
| 47 | AZNASTRAZENECA PLC | 650,000 | $32.3B | 0.71% | |
| 48 | BIIBBIOGEN INC | 113,500 | $31.8B | 0.69% | |
| 49 | BSXBOSTON SCIENTIFIC CORP | 800,000 | $30.9B | 0.67% | |
| 50 | GHGUARDANT HEALTH INC | 200,000 | $30.5B | 0.67% | |
| 51 | MDGLMADRIGAL PHARMACEUTICALS INC | 258,500 | $30.2B | 0.66% | |
| 52 | ASNDASCENDIS PHARMA A/S | 233,500 | $30.1B | 0.66% | |
| 53 | MIRMMIRUM PHARMACEUTICALS INC | 1,502,800 | $29.8B | 0.65% | |
| 54 | EVHEVOLENT HEALTH INC | 1,445,000 | $29.2B | 0.64% | |
| 55 | PRTAPROTHENA CORP PLC | 1,156,900 | $29.1B | 0.63% | |
| 56 | SWAVUSDSHOCKWAVE MED INC | 220,000 | $28.7B | 0.63% | |
| 57 | ACCDEURACCOLADE INC | 625,000 | $28.4B | 0.62% | |
| 58 | ACADACADIA PHARMACEUTICALS INC | 1,076,200 | $27.8B | 0.61% | |
| 59 | LUNGPULMONX CORP | 592,500 | $27.1B | 0.59% | |
| 60 | SPRBSPRUCE BIOSCIENCES INC | 1,579,301 | $26.2B | 0.57% | |
| 61 | ADPTADAPTIVE BIOTECHNOLOGIES COR | 650,000 | $26.2B | 0.57% | |
| 62 | AMRNAMARIN CORP PLC | 4,195,000 | $26.1B | 0.57% | |
| 63 | —PPD INC | 675,000 | $25.5B | 0.56% | |
| 64 | SRPTSAREPTA THERAPEUTICS INC | 328,750 | $24.5B | 0.53% | |
| 65 | —EPIZYME INC | 2,802,954 | $24.4B | 0.53% | |
| 66 | KYMRKYMERA THERAPEUTICS INC | 621,777 | $24.2B | 0.53% | |
| 67 | NVCRNOVOCURE LTD | 175,000 | $23.1B | 0.50% | |
| 68 | —INTERSECT ENT INC | 1,080,200 | $22.6B | 0.49% | |
| 69 | COLLCOLLEGIUM PHARMACEUTICAL INC | 920,000 | $21.8B | 0.48% | |
| 70 | INSPINSPIRE MED SYS INC | 100,000 | $20.7B | 0.45% | |
| 71 | —ABCAM PLC | 1,069,236 | $20.6B | 0.45% | |
| 72 | OSH3EUROAK STR HEALTH INC | 375,000 | $20.4B | 0.44% | |
| 73 | KURAKURA ONCOLOGY INC | 710,035 | $20.1B | 0.44% | |
| 74 | BMRNBIOMARIN PHARMACEUTICAL INC | 253,500 | $19.1B | 0.42% | |
| 75 | CYTK 4 11/15/26CYTOKINETICS INC | 8,000,000 | $19.1B | 0.42% | |
| 76 | RCKTROCKET PHARMACEUTICALS INC | 403,070 | $17.9B | 0.39% | |
| 77 | —SIERRA ONCOLOGY INC | 1,017,358 | $17.5B | 0.38% | |
| 78 | —GAMIDA CELL LTD | 2,100,300 | $17.0B | 0.37% | |
| 79 | INZYINOZYME PHARMA INC | 827,900 | $16.4B | 0.36% | |
| 80 | PRLDPRELUDE THERAPEUTICS INC | 378,195 | $16.4B | 0.36% | |
| 81 | DVAXDYNAVAX TECHNOLOGIES CORP | 1,658,520 | $16.3B | 0.36% | |
| 82 | RIGLUSDRIGEL PHARMACEUTICALS INC | 4,742,000 | $16.2B | 0.35% | |
| 83 | NKTXNKARTA INC | 491,848 | $16.2B | 0.35% | |
| 84 | MREOMEREO BIOPHARMA GROUP PLC | 4,494,869 | $15.1B | 0.33% | |
| 85 | AKROAKERO THERAPEUTICS INC | 521,171 | $15.1B | 0.33% | |
| 86 | EPIEURESSA PHARMA INC | 503,035 | $14.6B | 0.32% | |
| 87 | —ATHIRA PHARMA INC | 788,202 | $14.5B | 0.32% | |
| 88 | —OLINK HLDG AB | 400,000 | $14.4B | 0.31% | |
| 89 | SPROSPERO THERAPEUTICS INC | 965,928 | $14.2B | 0.31% | |
| 90 | GOSS 5 06/01/27GOSSAMER BIO INC | 15,573,000 | $14.0B | 0.30% | |
| 91 | TBPHTHERAVANCE BIOPHARMA INC | 682,600 | $13.9B | 0.30% | |
| 92 | CERE1EURCEREVEL THERAPEUTICS HLDNG I | 1,005,100 | $13.8B | 0.30% | |
| 93 | APLTAPPLIED THERAPEUTICS INC | 701,680 | $13.2B | 0.29% | |
| 94 | TGTXTG THERAPEUTICS INC | 266,520 | $12.8B | 0.28% | |
| 95 | RYTMRHYTHM PHARMACEUTICALS INC | 599,280 | $12.7B | 0.28% | |
| 96 | GLPGGALAPAGOS NV | 165,000 | $12.7B | 0.28% | |
| 97 | MGNXMACROGENICS INC | 393,479 | $12.5B | 0.27% | |
| 98 | AGLEUSDAEGLEA BIOTHERAPEUTICS INC | 1,577,296 | $12.5B | 0.27% | |
| 99 | INNVINNOVAGE HLDG CORP | 475,000 | $12.3B | 0.27% | |
| 100 | —PARATEK PHARMACEUTICALS INC | 1,684,714 | $11.9B | 0.26% |
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