Rock Springs Capital Management LP Q4 2022 Filing
Filed February 14, 2023
Portfolio Value
$4.2T
Holdings
120
Report Date
Q4 2022
Filing Type
13F-HR
All Holdings (120 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | HUMHUMANA INC | 426,500 | $218.4B | 5.26% | |
| 2 | IMCRIMMUNOCORE HLDGS PLC | 3,321,066 | $189.5B | 4.56% | |
| 3 | PODDINSULET CORP | 524,250 | $154.3B | 3.71% | |
| 4 | UNHUNITEDHEALTH GROUP INC | 270,000 | $143.1B | 3.44% | |
| 5 | NBIXNEUROCRINE BIOSCIENCES INC | 1,122,500 | $134.1B | 3.23% | |
| 6 | ARGXARGENX SE | 350,000 | $132.6B | 3.19% | |
| 7 | AGLAGILON HEALTH INC | 7,872,500 | $127.1B | 3.06% | |
| 8 | —PROMETHEUS BIOSCIENCES INC | 1,031,550 | $113.5B | 2.73% | |
| 9 | PENPENUMBRA INC | 508,250 | $113.1B | 2.72% | |
| 10 | EVHEVOLENT HEALTH INC | 3,803,500 | $106.8B | 2.57% | |
| 11 | MDGLMADRIGAL PHARMACEUTICALS INC | 348,121 | $101.0B | 2.43% | |
| 12 | IDXXIDEXX LABS INC | 207,500 | $84.7B | 2.04% | |
| 13 | HZNPHORIZON THERAPEUTICS PUB L | 739,700 | $84.2B | 2.03% | |
| 14 | AGIOAGIOS PHARMACEUTICALS INC | 2,996,592 | $84.1B | 2.02% | |
| 15 | 2L9BLUEPRINT MEDICINES CORP | 1,891,510 | $82.9B | 1.99% | |
| 16 | KRTXKARUNA THERAPEUTICS INC | 413,762 | $81.3B | 1.96% | |
| 17 | ISRGINTUITIVE SURGICAL INC | 298,500 | $79.2B | 1.91% | |
| 18 | CERE1EURCEREVEL THERAPEUTICS HLDNG I | 2,506,464 | $79.1B | 1.90% | |
| 19 | ALNYALNYLAM PHARMACEUTICALS INC | 332,500 | $79.0B | 1.90% | |
| 20 | AKROAKERO THERAPEUTICS INC | 1,400,654 | $76.8B | 1.85% | |
| 21 | ACHCACADIA HEALTHCARE COMPANY IN | 845,500 | $69.6B | 1.67% | |
| 22 | AFWALIGN TECHNOLOGY INC | 302,350 | $63.8B | 1.53% | |
| 23 | ACRSACLARIS THERAPEUTICS INC | 3,961,249 | $62.4B | 1.50% | |
| 24 | RAREULTRAGENYX PHARMACEUTICAL IN | 1,290,279 | $59.8B | 1.44% | |
| 25 | BAXBAXTER INTL INC | 1,150,000 | $58.6B | 1.41% | |
| 26 | SRPTSAREPTA THERAPEUTICS INC | 436,000 | $56.5B | 1.36% | |
| 27 | DC4DEXCOM INC | 490,500 | $55.5B | 1.34% | |
| 28 | ASNDASCENDIS PHARMA A/S | 425,500 | $52.0B | 1.25% | |
| 29 | SGENUSDSEAGEN INC | 400,200 | $51.4B | 1.24% | |
| 30 | RYTMRHYTHM PHARMACEUTICALS INC | 1,760,865 | $51.3B | 1.23% | |
| 31 | EWEDWARDS LIFESCIENCES CORP | 645,900 | $48.2B | 1.16% | |
| 32 | XENEXENON PHARMACEUTICALS INC | 1,175,672 | $46.4B | 1.12% | |
| 33 | AMLXAMYLYX PHARMACEUTICALS INC | 1,229,637 | $45.4B | 1.09% | |
| 34 | PRTAPROTHENA CORP PLC | 753,462 | $45.4B | 1.09% | |
| 35 | EXASEXACT SCIENCES CORP | 887,500 | $43.9B | 1.06% | |
| 36 | WSTWEST PHARMACEUTICAL SVSC INC | 185,500 | $43.7B | 1.05% | |
| 37 | NVROEURNEVRO CORP | 1,077,900 | $42.7B | 1.03% | |
| 38 | PHRPHREESIA INC | 1,302,500 | $42.1B | 1.01% | |
| 39 | PCRXPACIRA BIOSCIENCES INC | 1,032,600 | $39.9B | 0.96% | |
| 40 | —OLINK HLDG AB | 1,445,000 | $36.7B | 0.88% | |
| 41 | MRTXEURMIRATI THERAPEUTICS INC | 805,024 | $36.5B | 0.88% | |
| 42 | MIRMMIRUM PHARMACEUTICALS INC | 1,795,733 | $35.0B | 0.84% | |
| 43 | FRPTFRESHPET INC | 657,000 | $34.7B | 0.83% | |
| 44 | —ABCAM PLC | 2,180,000 | $33.9B | 0.82% | |
| 45 | ZLABZAI LAB LTD | 1,059,700 | $32.5B | 0.78% | |
| 46 | KYMRKYMERA THERAPEUTICS INC | 1,227,779 | $30.6B | 0.74% | |
| 47 | IRTCIRHYTHM TECHNOLOGIES INC | 309,450 | $29.0B | 0.70% | |
| 48 | BMRNBIOMARIN PHARMACEUTICAL INC | 264,500 | $27.4B | 0.66% | |
| 49 | XLVSELECT SECTOR SPDR TR | 200,000 | $27.2B | 0.65% | |
| 50 | CMPXCOMPASS THERAPEUTICS INC | 5,333,188 | $26.8B | 0.65% | |
| 51 | —MERSANA THERAPEUTICS INC | 4,103,803 | $24.0B | 0.58% | |
| 52 | SWAVUSDSHOCKWAVE MED INC | 115,100 | $23.7B | 0.57% | |
| 53 | LEGNLEGEND BIOTECH CORP | 450,466 | $22.5B | 0.54% | |
| 54 | BCRXBIOCRYST PHARMACEUTICALS INC | 1,890,737 | $21.7B | 0.52% | |
| 55 | AZTAAZENTA INC | 351,500 | $20.5B | 0.49% | |
| 56 | CYTKCYTOKINETICS INC | 443,000 | $20.3B | 0.49% | |
| 57 | TVTXTRAVERE THERAPEUTICS INC | 951,650 | $20.0B | 0.48% | |
| 58 | IMTXIMMATICS N.V | 2,274,784 | $19.8B | 0.48% | |
| 59 | DVAXDYNAVAX TECHNOLOGIES CORP | 1,813,758 | $19.3B | 0.46% | |
| 60 | TCE2CELLDEX THERAPEUTICS INC NEW | 421,504 | $18.8B | 0.45% | |
| 61 | CNMDCONMED CORP | 205,000 | $18.2B | 0.44% | |
| 62 | ANABANAPTYSBIO INC | 576,600 | $17.9B | 0.43% | |
| 63 | COLLCOLLEGIUM PHARMACEUTICAL INC | 725,000 | $16.8B | 0.40% | |
| 64 | WRBYWARBY PARKER INC | 1,218,975 | $16.4B | 0.40% | |
| 65 | ACCDEURACCOLADE INC | 1,938,000 | $15.1B | 0.36% | |
| 66 | —CINCOR PHARMA INC | 1,116,578 | $13.7B | 0.33% | |
| 67 | LFSTLIFESTANCE HEALTH GROUP INC | 2,700,000 | $13.3B | 0.32% | |
| 68 | 290ACHINOOK THERAPEUTICS INC | 507,512 | $13.3B | 0.32% | |
| 69 | AM6AMICUS THERAPEUTICS INC | 1,063,806 | $13.0B | 0.31% | |
| 70 | VERVVERVE THERAPEUTICS INC | 558,837 | $10.8B | 0.26% | |
| 71 | AURAAURA BIOSCIENCES INC | 1,019,757 | $10.7B | 0.26% | |
| 72 | RLAYRELAY THERAPEUTICS INC | 673,966 | $10.1B | 0.24% | |
| 73 | HCATHEALTH CATALYST INC | 929,900 | $9.9B | 0.24% | |
| 74 | EDAEDAP TMS S A | 910,000 | $9.7B | 0.23% | |
| 75 | —AMRYT PHARMA PLC | 1,325,625 | $9.7B | 0.23% | |
| 76 | BHVNBIOHAVEN LTD | 668,913 | $9.3B | 0.22% | |
| 77 | NVCRNOVOCURE LTD | 125,000 | $9.2B | 0.22% | |
| 78 | MGNXMACROGENICS INC | 1,123,096 | $7.5B | 0.18% | |
| 79 | IRONDISC MEDICINE INC | 339,497 | $6.8B | 0.16% | |
| 80 | —ICOSAVAX INC | 781,000 | $6.2B | 0.15% | |
| 81 | BMEABIOMEA FUSION INC | 730,846 | $6.2B | 0.15% | |
| 82 | VIGLVIGIL NEUROSCIENCE INC | 471,958 | $5.9B | 0.14% | |
| 83 | NVTA1EURINVITAE CORP | 3,097,525 | $5.8B | 0.14% | |
| 84 | LUNGPULMONX CORP | 652,400 | $5.5B | 0.13% | |
| 85 | NVV1NOVAVAX INC | 532,600 | $5.5B | 0.13% | |
| 86 | GHGUARDANT HEALTH INC | 200,000 | $5.4B | 0.13% | |
| 87 | —GAMIDA CELL LTD | 4,119,883 | $5.3B | 0.13% | |
| 88 | —F-STAR THERAPEUTICS INC | 751,889 | $4.8B | 0.11% | |
| 89 | DSGNDESIGN THERAPEUTICS INC | 460,391 | $4.7B | 0.11% | |
| 90 | MREOMEREO BIOPHARMA GROUP PLC | 6,244,897 | $4.7B | 0.11% | |
| 91 | —KINNATE BIOPHARMA INC | 746,973 | $4.6B | 0.11% | |
| 92 | BEAMBEAM THERAPEUTICS INC | 111,430 | $4.4B | 0.10% | |
| 93 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 2,676,536 | $3.9B | 0.09% | |
| 94 | ALTALTIMMUNE INC | 223,255 | $3.7B | 0.09% | |
| 95 | XLOXILIO THERAPEUTICS INC | 1,362,878 | $3.7B | 0.09% | |
| 96 | —PARATEK PHARMACEUTICALS INC | 1,734,037 | $3.2B | 0.08% | |
| 97 | INZYINOZYME PHARMA INC | 3,086,027 | $3.2B | 0.08% | |
| 98 | GOSS 5 06/01/27GOSSAMER BIO INC | 9,573,000 | $3.1B | 0.07% | |
| 99 | TVTX 2.5 09/15/25TRAVERE THERAPEUTICS INC | 3,250,000 | $3.0B | 0.07% | |
| 100 | FULCFULCRUM THERAPEUTICS INC | 384,590 | $2.8B | 0.07% |
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