Rock Springs Capital Management LP Q3 2023 Filing
Filed November 14, 2023
Portfolio Value
$3.7B
Holdings
120
Report Date
Q3 2023
Filing Type
13F-HR
All Holdings (120 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | HUMHUMANA INC | 436,500 | $212.4T | 5688583.72% | |
| 2 | IMCRIMMUNOCORE HLDGS PLC | 2,943,710 | $152.8T | 4092433.11% | |
| 3 | AGLAGILON HEALTH INC | 8,292,500 | $147.3T | 3945005.83% | |
| 4 | NBIXNEUROCRINE BIOSCIENCES INC | 1,236,000 | $139.1T | 3724690.59% | |
| 5 | 2L9BLUEPRINT MEDICINES CORP | 2,685,294 | $134.9T | 3612332.84% | |
| 6 | ARGXARGENX SE | 259,000 | $127.3T | 3410808.59% | |
| 7 | PENPENUMBRA INC | 503,750 | $121.9T | 3264285.16% | |
| 8 | UNHUNITEDHEALTH GROUP INC | 230,000 | $116.0T | 3106284.80% | |
| 9 | EVHEVOLENT HEALTH INC | 3,865,000 | $105.2T | 2819138.08% | |
| 10 | ISRGINTUITIVE SURGICAL INC | 298,500 | $87.2T | 2337101.11% | |
| 11 | KRTXKARUNA THERAPEUTICS INC | 505,433 | $85.5T | 2289289.55% | |
| 12 | IDXXIDEXX LABS INC | 194,500 | $85.0T | 2278182.42% | |
| 13 | SGENUSDSEAGEN INC | 400,200 | $84.9T | 2274255.89% | |
| 14 | WSTWEST PHARMACEUTICAL SVSC INC | 202,000 | $75.8T | 2030228.79% | |
| 15 | AKROAKERO THERAPEUTICS INC | 1,419,150 | $71.8T | 1922765.56% | |
| 16 | EXASEXACT SCIENCES CORP | 1,018,250 | $69.5T | 1860738.49% | |
| 17 | AGIOAGIOS PHARMACEUTICALS INC | 2,710,061 | $67.1T | 1796691.36% | |
| 18 | AFWALIGN TECHNOLOGY INC | 217,000 | $66.3T | 1774737.78% | |
| 19 | ACHCACADIA HEALTHCARE COMPANY IN | 908,000 | $63.8T | 1710102.55% | |
| 20 | BSXBOSTON SCIENTIFIC CORP | 1,160,000 | $61.2T | 1640631.78% | |
| 21 | PODDINSULET CORP | 380,000 | $60.6T | 1623440.08% | |
| 22 | MIRMMIRUM PHARMACEUTICALS INC | 1,820,733 | $57.5T | 1541177.13% | |
| 23 | CERE1EURCEREVEL THERAPEUTICS HLDNG I | 2,529,116 | $55.2T | 1478909.81% | |
| 24 | DC4DEXCOM INC | 584,000 | $54.5T | 1459532.26% | |
| 25 | RAREULTRAGENYX PHARMACEUTICAL IN | 1,476,441 | $52.6T | 1409921.20% | |
| 26 | ALNYALNYLAM PHARMACEUTICALS INC | 279,500 | $49.5T | 1325926.90% | |
| 27 | MRTXEURMIRATI THERAPEUTICS INC | 1,131,207 | $49.3T | 1319924.72% | |
| 28 | SRPTSAREPTA THERAPEUTICS INC | 392,000 | $47.5T | 1272856.82% | |
| 29 | EWEDWARDS LIFESCIENCES CORP | 647,300 | $44.8T | 1201248.05% | |
| 30 | FRPTFRESHPET INC | 662,500 | $43.6T | 1169118.90% | |
| 31 | XENEXENON PHARMACEUTICALS INC | 1,178,002 | $40.2T | 1077911.47% | |
| 32 | ASNDASCENDIS PHARMA A/S | 425,500 | $39.8T | 1067284.44% | |
| 33 | RYTMRHYTHM PHARMACEUTICALS INC | 1,597,123 | $36.6T | 980769.43% | |
| 34 | PHRPHREESIA INC | 1,776,391 | $33.2T | 888862.63% | |
| 35 | IRTCIRHYTHM TECHNOLOGIES INC | 350,750 | $33.1T | 885613.69% | |
| 36 | PCRXPACIRA BIOSCIENCES INC | 1,055,500 | $32.4T | 867426.73% | |
| 37 | ACCDEURACCOLADE INC | 2,913,000 | $30.8T | 825553.76% | |
| 38 | LEGNLEGEND BIOTECH CORP | 458,265 | $30.8T | 824539.08% | |
| 39 | ZLABZAI LAB LTD | 1,237,023 | $30.1T | 805530.41% | |
| 40 | PRTAPROTHENA CORP PLC | 614,298 | $29.6T | 793954.54% | |
| 41 | HZNPHORIZON THERAPEUTICS PUB L | 255,500 | $29.6T | 791782.56% | |
| 42 | SWAVUSDSHOCKWAVE MED INC | 147,500 | $29.4T | 786651.71% | |
| 43 | —ABCAM PLC | 1,275,000 | $28.9T | 772883.34% | |
| 44 | MDGLMADRIGAL PHARMACEUTICALS INC | 196,369 | $28.7T | 768181.71% | |
| 45 | AMLXAMYLYX PHARMACEUTICALS INC | 1,545,016 | $28.3T | 757775.46% | |
| 46 | ACRSACLARIS THERAPEUTICS INC | 3,960,449 | $27.1T | 726698.41% | |
| 47 | DVAXDYNAVAX TECHNOLOGIES CORP | 1,813,758 | $26.8T | 717594.42% | |
| 48 | XLVSELECT SECTOR SPDR TR | 200,000 | $25.7T | 689703.94% | |
| 49 | LFSTLIFESTANCE HEALTH GROUP INC | 3,670,000 | $25.2T | 675370.38% | |
| 50 | IMVTIMMUNOVANT INC | 644,344 | $24.7T | 662605.61% | |
| 51 | —OLINK HLDG AB | 1,676,500 | $24.7T | 662391.55% | |
| 52 | AZTAAZENTA INC | 477,500 | $24.0T | 641962.68% | |
| 53 | BMRNBIOMARIN PHARMACEUTICAL INC | 264,500 | $23.4T | 626888.06% | |
| 54 | NVROEURNEVRO CORP | 1,211,600 | $23.3T | 623780.59% | |
| 55 | IMTXIMMATICS N.V | 1,875,466 | $21.7T | 581750.76% | |
| 56 | KYMRKYMERA THERAPEUTICS INC | 1,504,351 | $20.9T | 560122.72% | |
| 57 | WRBYWARBY PARKER INC | 1,575,000 | $20.7T | 555207.92% | |
| 58 | RVMDREVOLUTION MEDICINES INC | 725,152 | $20.1T | 537668.18% | |
| 59 | MRUSMERUS N V | 838,428 | $19.8T | 529576.59% | |
| 60 | AMGNAMGEN INC | 68,000 | $18.3T | 489545.15% | |
| 61 | BCRXBIOCRYST PHARMACEUTICALS INC | 2,551,226 | $18.1T | 483839.58% | |
| 62 | IRONDISC MEDICINE INC | 363,468 | $17.1T | 457402.37% | |
| 63 | TVTXTRAVERE THERAPEUTICS INC | 1,807,742 | $16.2T | 432905.56% | |
| 64 | INZYINOZYME PHARMA INC | 3,681,174 | $15.5T | 414147.32% | |
| 65 | TCE2CELLDEX THERAPEUTICS INC NEW | 500,101 | $13.8T | 368659.45% | |
| 66 | AM6AMICUS THERAPEUTICS INC | 1,063,806 | $12.9T | 346509.56% | |
| 67 | COLLCOLLEGIUM PHARMACEUTICAL INC | 562,000 | $12.6T | 336459.70% | |
| 68 | IMGNEURIMMUNOGEN INC | 759,365 | $12.1T | 322809.81% | |
| 69 | ABOSACUMEN PHARMACEUTICALS INC | 2,812,579 | $11.7T | 312659.80% | |
| 70 | MLYSMINERALYS THERAPEUTICS INC | 1,167,492 | $11.1T | 297408.68% | |
| 71 | CMPXCOMPASS THERAPEUTICS INC | 5,513,788 | $10.9T | 290961.47% | |
| 72 | KRYSKRYSTAL BIOTECH INC | 90,560 | $10.5T | 281393.21% | |
| 73 | MREOMEREO BIOPHARMA GROUP PLC | 7,676,481 | $9.9T | 265259.58% | |
| 74 | EDAEDAP TMS S A | 1,360,000 | $9.5T | 255737.98% | |
| 75 | INSPINSPIRE MED SYS INC | 44,500 | $8.8T | 236542.09% | |
| 76 | OKURRENEO PHARMACEUTICALS INC | 1,143,185 | $8.7T | 233187.70% | |
| 77 | PLRXPLIANT THERAPEUTICS INC | 491,221 | $8.5T | 228163.00% | |
| 78 | LUNGPULMONX CORP | 652,400 | $6.7T | 180523.39% | |
| 79 | —ICOSAVAX INC | 868,409 | $6.7T | 180279.04% | |
| 80 | SGMTSAGIMET BIOSCIENCES INC | 738,355 | $6.5T | 174047.22% | |
| 81 | AURAAURA BIOSCIENCES INC | 722,896 | $6.5T | 173695.06% | |
| 82 | SPRBSPRUCE BIOSCIENCES INC | 2,728,125 | $6.2T | 165155.08% | |
| 83 | RLAYRELAY THERAPEUTICS INC | 673,966 | $5.7T | 151828.46% | |
| 84 | MGNXMACROGENICS INC | 1,178,796 | $5.5T | 147144.40% | |
| 85 | NVV1NOVAVAX INC | 647,700 | $4.7T | 125612.16% | |
| 86 | —MERSANA THERAPEUTICS INC | 3,403,133 | $4.3T | 115771.55% | |
| 87 | CYTKCYTOKINETICS INC | 134,252 | $4.0T | 105943.11% | |
| 88 | AUPHAURINIA PHARMACEUTICALS INC | 479,540 | $3.7T | 99807.94% | |
| 89 | GOSS 5 06/01/27GOSSAMER BIO INC | 9,573,000 | $3.7T | 99324.73% | |
| 90 | FULCFULCRUM THERAPEUTICS INC | 727,673 | $3.2T | 86544.29% | |
| 91 | HCATHEALTH CATALYST INC | 307,500 | $3.1T | 83357.53% | |
| 92 | XLOXILIO THERAPEUTICS INC | 1,440,759 | $3.0T | 81431.59% | |
| 93 | GOSSGOSSAMER BIO INC | 3,266,960 | $2.7T | 72879.22% | |
| 94 | BEAMBEAM THERAPEUTICS INC | 111,430 | $2.7T | 71785.46% | |
| 95 | TVTX 2.5 09/15/25TRAVERE THERAPEUTICS INC | 3,250,000 | $2.7T | 71720.93% | |
| 96 | VIGLVIGIL NEUROSCIENCE INC | 471,958 | $2.5T | 68141.45% | |
| 97 | BMEABIOMEA FUSION INC | 181,147 | $2.5T | 66768.07% | |
| 98 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 2,787,845 | $2.2T | 58248.19% | |
| 99 | EPIEURESSA PHARMA INC | 677,005 | $2.1T | 56036.30% | |
| 100 | APLTAPPLIED THERAPEUTICS INC | 808,809 | $2.0T | 53946.65% |
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