Rock Springs Capital Management LP Q2 2023 Filing
Filed August 14, 2023
Portfolio Value
$4.2B
Holdings
123
Report Date
Q2 2023
Filing Type
13F-HR
All Holdings (123 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | HUMHUMANA INC | 470,000 | $210.2T | 4999756.14% | |
| 2 | IMCRIMMUNOCORE HLDGS PLC | 3,028,410 | $181.6T | 4320096.54% | |
| 3 | PODDINSULET CORP | 559,000 | $161.2T | 3834721.75% | |
| 4 | AGLAGILON HEALTH INC | 8,282,500 | $143.6T | 3416864.00% | |
| 5 | 2L9BLUEPRINT MEDICINES CORP | 2,186,672 | $138.2T | 3287894.52% | |
| 6 | ARGXARGENX SE | 350,000 | $136.4T | 3245256.56% | |
| 7 | PENPENUMBRA INC | 366,000 | $125.9T | 2995935.27% | |
| 8 | NBIXNEUROCRINE BIOSCIENCES INC | 1,279,500 | $120.7T | 2870576.58% | |
| 9 | EVHEVOLENT HEALTH INC | 3,803,500 | $115.2T | 2741846.92% | |
| 10 | UNHUNITEDHEALTH GROUP INC | 230,000 | $110.5T | 2630055.43% | |
| 11 | KRTXKARUNA THERAPEUTICS INC | 493,527 | $107.0T | 2546170.60% | |
| 12 | ISRGINTUITIVE SURGICAL INC | 298,500 | $102.1T | 2428350.65% | |
| 13 | IDXXIDEXX LABS INC | 194,500 | $97.7T | 2324017.59% | |
| 14 | EXASEXACT SCIENCES CORP | 943,500 | $88.6T | 2107776.95% | |
| 15 | CERE1EURCEREVEL THERAPEUTICS HLDNG I | 2,513,916 | $79.9T | 1901334.14% | |
| 16 | WSTWEST PHARMACEUTICAL SVSC INC | 202,000 | $77.3T | 1838086.31% | |
| 17 | SGENUSDSEAGEN INC | 400,200 | $77.0T | 1832460.92% | |
| 18 | AFWALIGN TECHNOLOGY INC | 217,000 | $76.7T | 1825737.23% | |
| 19 | AGIOAGIOS PHARMACEUTICALS INC | 2,686,167 | $76.1T | 1809853.45% | |
| 20 | AKROAKERO THERAPEUTICS INC | 1,550,754 | $72.4T | 1722597.99% | |
| 21 | ACHCACADIA HEALTHCARE COMPANY IN | 908,000 | $72.3T | 1720419.10% | |
| 22 | ALNYALNYLAM PHARMACEUTICALS INC | 345,000 | $65.5T | 1559023.58% | |
| 23 | RAREULTRAGENYX PHARMACEUTICAL IN | 1,384,269 | $63.9T | 1519221.52% | |
| 24 | DC4DEXCOM INC | 490,500 | $63.0T | 1499660.97% | |
| 25 | EWEDWARDS LIFESCIENCES CORP | 645,900 | $60.9T | 1449546.91% | |
| 26 | —ABCAM PLC | 2,405,000 | $58.9T | 1400123.05% | |
| 27 | PRTAPROTHENA CORP PLC | 753,462 | $51.4T | 1223973.51% | |
| 28 | HZNPHORIZON THERAPEUTICS PUB L | 495,000 | $50.9T | 1211230.09% | |
| 29 | SRPTSAREPTA THERAPEUTICS INC | 425,000 | $48.7T | 1157943.65% | |
| 30 | MIRMMIRUM PHARMACEUTICALS INC | 1,820,733 | $47.1T | 1120623.82% | |
| 31 | MDGLMADRIGAL PHARMACEUTICALS INC | 199,218 | $46.0T | 1094857.78% | |
| 32 | XENEXENON PHARMACEUTICALS INC | 1,178,002 | $45.4T | 1079006.13% | |
| 33 | FRPTFRESHPET INC | 662,500 | $43.6T | 1037277.43% | |
| 34 | PCRXPACIRA BIOSCIENCES INC | 1,035,000 | $41.5T | 986681.19% | |
| 35 | ACRSACLARIS THERAPEUTICS INC | 3,961,849 | $41.1T | 977448.37% | |
| 36 | MRTXEURMIRATI THERAPEUTICS INC | 1,121,647 | $40.5T | 964142.69% | |
| 37 | PHRPHREESIA INC | 1,305,000 | $40.5T | 962785.26% | |
| 38 | ACCDEURACCOLADE INC | 2,820,000 | $38.0T | 903719.93% | |
| 39 | ASNDASCENDIS PHARMA A/S | 425,500 | $38.0T | 903493.32% | |
| 40 | KYMRKYMERA THERAPEUTICS INC | 1,487,551 | $34.2T | 813631.93% | |
| 41 | ZLABZAI LAB LTD | 1,222,423 | $33.9T | 806470.60% | |
| 42 | AMLXAMYLYX PHARMACEUTICALS INC | 1,544,616 | $33.3T | 792661.61% | |
| 43 | SWAVUSDSHOCKWAVE MED INC | 115,100 | $32.9T | 781558.81% | |
| 44 | IRTCIRHYTHM TECHNOLOGIES INC | 309,450 | $32.3T | 768024.76% | |
| 45 | LEGNLEGEND BIOTECH CORP | 458,265 | $31.6T | 752613.00% | |
| 46 | —OLINK HLDG AB | 1,654,000 | $31.0T | 737825.96% | |
| 47 | NVROEURNEVRO CORP | 1,211,400 | $30.8T | 732622.53% | |
| 48 | IMTXIMMATICS N.V | 2,536,144 | $29.3T | 696300.77% | |
| 49 | CNMDCONMED CORP | 205,000 | $27.9T | 662763.40% | |
| 50 | XLVSELECT SECTOR SPDR TR | 200,000 | $26.5T | 631562.37% | |
| 51 | LFSTLIFESTANCE HEALTH GROUP INC | 2,900,000 | $26.5T | 629920.77% | |
| 52 | RYTMRHYTHM PHARMACEUTICALS INC | 1,597,123 | $26.3T | 626579.48% | |
| 53 | TVTXTRAVERE THERAPEUTICS INC | 1,527,720 | $23.5T | 558280.08% | |
| 54 | DVAXDYNAVAX TECHNOLOGIES CORP | 1,813,758 | $23.4T | 557518.14% | |
| 55 | BMRNBIOMARIN PHARMACEUTICAL INC | 264,500 | $22.9T | 545458.53% | |
| 56 | AZTAAZENTA INC | 469,900 | $21.9T | 521859.32% | |
| 57 | MLYSMINERALYS THERAPEUTICS INC | 1,167,492 | $19.9T | 473582.30% | |
| 58 | INZYINOZYME PHARMA INC | 3,428,084 | $19.1T | 454280.20% | |
| 59 | RVMDREVOLUTION MEDICINES INC | 702,712 | $18.8T | 447217.01% | |
| 60 | BMEABIOMEA FUSION INC | 836,898 | $18.4T | 437043.04% | |
| 61 | BCRXBIOCRYST PHARMACEUTICALS INC | 2,497,193 | $17.6T | 418255.76% | |
| 62 | CMPXCOMPASS THERAPEUTICS INC | 5,513,788 | $17.5T | 417152.01% | |
| 63 | IRONDISC MEDICINE INC | 363,468 | $16.1T | 383942.60% | |
| 64 | WRBYWARBY PARKER INC | 1,325,000 | $15.5T | 368508.53% | |
| 65 | 290ACHINOOK THERAPEUTICS INC | 396,280 | $15.2T | 362223.55% | |
| 66 | CYTKCYTOKINETICS INC | 447,600 | $14.6T | 347369.10% | |
| 67 | BSXBOSTON SCIENTIFIC CORP | 267,500 | $14.5T | 344237.30% | |
| 68 | TCE2CELLDEX THERAPEUTICS INC NEW | 421,615 | $14.3T | 340343.19% | |
| 69 | COLLCOLLEGIUM PHARMACEUTICAL INC | 650,000 | $14.0T | 332327.99% | |
| 70 | AM6AMICUS THERAPEUTICS INC | 1,063,806 | $13.4T | 317884.40% | |
| 71 | MRUSMERUS N V | 478,531 | $12.6T | 299763.04% | |
| 72 | AURAAURA BIOSCIENCES INC | 1,019,757 | $12.6T | 299626.91% | |
| 73 | HCATHEALTH CATALYST INC | 929,900 | $11.6T | 276543.47% | |
| 74 | —MERSANA THERAPEUTICS INC | 3,403,133 | $11.2T | 266374.10% | |
| 75 | EDAEDAP TMS S A | 1,186,300 | $10.9T | 260221.16% | |
| 76 | BHVNBIOHAVEN LTD | 401,624 | $9.6T | 228558.82% | |
| 77 | MREOMEREO BIOPHARMA GROUP PLC | 7,042,391 | $9.3T | 221162.36% | |
| 78 | PLRXPLIANT THERAPEUTICS INC | 491,221 | $8.9T | 211764.08% | |
| 79 | —ICOSAVAX INC | 868,409 | $8.6T | 205159.06% | |
| 80 | LUNGPULMONX CORP | 652,400 | $8.6T | 203485.66% | |
| 81 | RLAYRELAY THERAPEUTICS INC | 673,966 | $8.5T | 201393.19% | |
| 82 | OKURRENEO PHARMACEUTICALS INC | 1,143,185 | $7.5T | 178417.53% | |
| 83 | GHGUARDANT HEALTH INC | 200,000 | $7.2T | 170345.31% | |
| 84 | ANABANAPTYSBIO INC | 341,637 | $6.9T | 165322.91% | |
| 85 | MGNXMACROGENICS INC | 1,123,096 | $6.0T | 142951.21% | |
| 86 | SPRBSPRUCE BIOSCIENCES INC | 2,728,125 | $5.9T | 139546.81% | |
| 87 | NVCRNOVOCURE LTD | 125,000 | $5.2T | 123417.08% | |
| 88 | AUPHAURINIA PHARMACEUTICALS INC | 479,540 | $4.6T | 110437.69% | |
| 89 | VIGLVIGIL NEUROSCIENCE INC | 471,958 | $4.4T | 105547.59% | |
| 90 | KRYSKRYSTAL BIOTECH INC | 34,901 | $4.1T | 97481.70% | |
| 91 | —THESEUS PHARMACEUTICALS INC | 437,329 | $4.1T | 97074.94% | |
| 92 | NVV1NOVAVAX INC | 536,700 | $4.0T | 94871.89% | |
| 93 | —PARATEK PHARMACEUTICALS INC | 1,734,037 | $3.8T | 91173.33% | |
| 94 | XLOXILIO THERAPEUTICS INC | 1,440,759 | $3.8T | 89806.93% | |
| 95 | BEAMBEAM THERAPEUTICS INC | 111,430 | $3.6T | 84648.30% | |
| 96 | CYPHLEAP THERAPEUTICS INC | 1,074,517 | $3.4T | 80015.62% | |
| 97 | SLRNACELYRIN INC | 141,876 | $3.0T | 70545.99% | |
| 98 | FATEFATE THERAPEUTICS INC | 612,215 | $2.9T | 69331.09% | |
| 99 | DSGNDESIGN THERAPEUTICS INC | 460,391 | $2.9T | 69005.62% | |
| 100 | GOSS 5 06/01/27GOSSAMER BIO INC | 9,573,000 | $2.9T | 68732.83% |
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