Rock Springs Capital Management LP Q1 2023 Filing
Filed May 15, 2023
Portfolio Value
$4.2B
Holdings
121
Report Date
Q1 2023
Filing Type
13F-HR
All Holdings (121 positions)
| # | Stock | Shares | Value | % Portfolio | Type |
|---|---|---|---|---|---|
| 1 | HUMHUMANA INC | 426,500 | $207.0T | 4940021.25% | |
| 2 | AGLAGILON HEALTH INC | 7,882,500 | $187.2T | 4466670.57% | |
| 3 | PODDINSULET CORP | 536,750 | $171.2T | 4084741.76% | |
| 4 | IMCRIMMUNOCORE HLDGS PLC | 3,001,662 | $148.4T | 3540760.72% | |
| 5 | ARGXARGENX SE | 350,000 | $130.4T | 3111314.50% | |
| 6 | UNHUNITEDHEALTH GROUP INC | 270,000 | $127.6T | 3044420.39% | |
| 7 | EVHEVOLENT HEALTH INC | 3,803,500 | $123.4T | 2944790.83% | |
| 8 | NBIXNEUROCRINE BIOSCIENCES INC | 1,210,100 | $122.5T | 2922428.70% | |
| 9 | PENPENUMBRA INC | 433,500 | $120.8T | 2882483.42% | |
| 10 | —PROMETHEUS BIOSCIENCES INC | 1,031,550 | $110.7T | 2641358.06% | |
| 11 | IDXXIDEXX LABS INC | 207,500 | $103.8T | 2475790.64% | |
| 12 | 2L9BLUEPRINT MEDICINES CORP | 2,033,048 | $91.5T | 2182327.66% | |
| 13 | KRTXKARUNA THERAPEUTICS INC | 493,527 | $89.6T | 2138842.17% | |
| 14 | MDGLMADRIGAL PHARMACEUTICALS INC | 348,121 | $84.3T | 2012186.65% | |
| 15 | AFWALIGN TECHNOLOGY INC | 247,350 | $82.6T | 1971953.70% | |
| 16 | SGENUSDSEAGEN INC | 400,200 | $81.0T | 1933277.06% | |
| 17 | HZNPHORIZON THERAPEUTICS PUB L | 740,100 | $80.8T | 1927217.29% | |
| 18 | ISRGINTUITIVE SURGICAL INC | 298,500 | $76.3T | 1819451.88% | |
| 19 | WSTWEST PHARMACEUTICAL SVSC INC | 202,000 | $70.0T | 1669834.14% | |
| 20 | ALNYALNYLAM PHARMACEUTICALS INC | 345,000 | $69.1T | 1648920.57% | |
| 21 | EXASEXACT SCIENCES CORP | 941,500 | $63.8T | 1523247.24% | |
| 22 | ACHCACADIA HEALTHCARE COMPANY IN | 860,868 | $62.2T | 1483989.22% | |
| 23 | CERE1EURCEREVEL THERAPEUTICS HLDNG I | 2,513,916 | $61.3T | 1462914.32% | |
| 24 | AGIOAGIOS PHARMACEUTICALS INC | 2,661,605 | $61.1T | 1458683.03% | |
| 25 | SRPTSAREPTA THERAPEUTICS INC | 442,500 | $61.0T | 1455168.76% | |
| 26 | DC4DEXCOM INC | 490,500 | $57.0T | 1359648.71% | |
| 27 | AKROAKERO THERAPEUTICS INC | 1,454,254 | $55.6T | 1327521.50% | |
| 28 | RAREULTRAGENYX PHARMACEUTICAL IN | 1,336,401 | $53.6T | 1278608.22% | |
| 29 | EWEDWARDS LIFESCIENCES CORP | 645,900 | $53.4T | 1274925.00% | |
| 30 | ASNDASCENDIS PHARMA A/S | 425,500 | $45.6T | 1088508.18% | |
| 31 | FRPTFRESHPET INC | 662,500 | $43.9T | 1046247.89% | |
| 32 | MIRMMIRUM PHARMACEUTICALS INC | 1,795,733 | $43.1T | 1029132.04% | |
| 33 | AMLXAMYLYX PHARMACEUTICALS INC | 1,452,816 | $42.6T | 1017014.28% | |
| 34 | XENEXENON PHARMACEUTICALS INC | 1,178,002 | $42.2T | 1005921.43% | |
| 35 | PCRXPACIRA BIOSCIENCES INC | 1,032,600 | $42.1T | 1005437.42% | |
| 36 | PHRPHREESIA INC | 1,302,500 | $42.1T | 1003464.72% | |
| 37 | BMEABIOMEA FUSION INC | 1,297,213 | $40.2T | 959774.90% | |
| 38 | MRTXEURMIRATI THERAPEUTICS INC | 1,065,261 | $39.6T | 944978.10% | |
| 39 | NVROEURNEVRO CORP | 1,077,900 | $39.0T | 929700.58% | |
| 40 | IRTCIRHYTHM TECHNOLOGIES INC | 309,450 | $38.4T | 915742.91% | |
| 41 | —OLINK HLDG AB | 1,650,000 | $37.2T | 886954.75% | |
| 42 | ACCDEURACCOLADE INC | 2,545,000 | $36.6T | 873178.44% | |
| 43 | PRTAPROTHENA CORP PLC | 753,462 | $36.5T | 871346.12% | |
| 44 | KYMRKYMERA THERAPEUTICS INC | 1,228,379 | $36.4T | 868401.11% | |
| 45 | ZLABZAI LAB LTD | 1,059,700 | $35.2T | 840933.22% | |
| 46 | ACRSACLARIS THERAPEUTICS INC | 3,961,849 | $32.1T | 764720.56% | |
| 47 | —ABCAM PLC | 2,242,500 | $30.2T | 720168.04% | |
| 48 | TVTXTRAVERE THERAPEUTICS INC | 1,276,650 | $28.7T | 685042.70% | |
| 49 | RYTMRHYTHM PHARMACEUTICALS INC | 1,597,123 | $28.5T | 679813.12% | |
| 50 | XLVSELECT SECTOR SPDR TR | 200,000 | $25.9T | 617763.05% | |
| 51 | BMRNBIOMARIN PHARMACEUTICAL INC | 264,500 | $25.7T | 613658.79% | |
| 52 | SWAVUSDSHOCKWAVE MED INC | 115,100 | $25.0T | 595457.85% | |
| 53 | LEGNLEGEND BIOTECH CORP | 458,265 | $22.1T | 527230.13% | |
| 54 | LFSTLIFESTANCE HEALTH GROUP INC | 2,900,000 | $21.5T | 514094.72% | |
| 55 | CNMDCONMED CORP | 205,000 | $21.3T | 507993.91% | |
| 56 | BCRXBIOCRYST PHARMACEUTICALS INC | 2,334,085 | $19.5T | 464450.09% | |
| 57 | —AMRYT PHARMA PLC | 1,325,625 | $19.3T | 461141.86% | |
| 58 | AZTAAZENTA INC | 431,200 | $19.2T | 459054.92% | |
| 59 | INZYINOZYME PHARMA INC | 3,214,900 | $18.4T | 439519.78% | |
| 60 | MLYSMINERALYS THERAPEUTICS INC | 1,167,492 | $18.3T | 436216.42% | |
| 61 | CMPXCOMPASS THERAPEUTICS INC | 5,513,788 | $18.0T | 430183.90% | |
| 62 | DVAXDYNAVAX TECHNOLOGIES CORP | 1,813,758 | $17.8T | 424526.38% | |
| 63 | IMTXIMMATICS N.V | 2,513,923 | $17.3T | 413863.76% | |
| 64 | —MERSANA THERAPEUTICS INC | 4,103,803 | $16.9T | 402424.72% | |
| 65 | CYTKCYTOKINETICS INC | 447,600 | $15.8T | 375807.70% | |
| 66 | COLLCOLLEGIUM PHARMACEUTICAL INC | 650,000 | $15.6T | 372048.82% | |
| 67 | RVMDREVOLUTION MEDICINES INC | 702,712 | $15.2T | 363155.11% | |
| 68 | TCE2CELLDEX THERAPEUTICS INC NEW | 421,504 | $15.2T | 361842.18% | |
| 69 | WRBYWARBY PARKER INC | 1,300,000 | $13.8T | 328469.95% | |
| 70 | PLRXPLIANT THERAPEUTICS INC | 491,221 | $13.1T | 311756.06% | |
| 71 | ANABANAPTYSBIO INC | 576,600 | $12.5T | 299357.30% | |
| 72 | AM6AMICUS THERAPEUTICS INC | 1,063,806 | $11.8T | 281481.81% | |
| 73 | 290ACHINOOK THERAPEUTICS INC | 507,512 | $11.7T | 280319.72% | |
| 74 | EDAEDAP TMS S A | 1,030,000 | $11.4T | 272045.27% | |
| 75 | RLAYRELAY THERAPEUTICS INC | 673,966 | $11.1T | 264842.64% | |
| 76 | HCATHEALTH CATALYST INC | 929,900 | $10.9T | 258918.71% | |
| 77 | AURAAURA BIOSCIENCES INC | 1,019,757 | $9.5T | 225788.08% | |
| 78 | BHVNBIOHAVEN LTD | 685,623 | $9.4T | 223456.19% | |
| 79 | VERVVERVE THERAPEUTICS INC | 558,837 | $8.1T | 192267.89% | |
| 80 | MGNXMACROGENICS INC | 1,123,096 | $8.1T | 192128.75% | |
| 81 | NVCRNOVOCURE LTD | 125,000 | $7.5T | 179361.72% | |
| 82 | LUNGPULMONX CORP | 652,400 | $7.3T | 174025.18% | |
| 83 | OKURRENEO PHARMACEUTICALS INC | 1,143,185 | $6.8T | 163107.53% | |
| 84 | IRONDISC MEDICINE INC | 313,468 | $6.6T | 158482.20% | |
| 85 | SPRBSPRUCE BIOSCIENCES INC | 2,728,125 | $6.0T | 143850.99% | |
| 86 | AUPHAURINIA PHARMACEUTICALS INC | 479,540 | $5.3T | 125398.31% | |
| 87 | —ICOSAVAX INC | 864,510 | $5.0T | 119633.92% | |
| 88 | GHGUARDANT HEALTH INC | 200,000 | $4.7T | 111852.05% | |
| 89 | —KINNATE BIOPHARMA INC | 746,973 | $4.7T | 111388.72% | |
| 90 | VIGLVIGIL NEUROSCIENCE INC | 471,958 | $4.6T | 110240.81% | |
| 91 | XLOXILIO THERAPEUTICS INC | 1,440,759 | $4.6T | 108969.99% | |
| 92 | MREOMEREO BIOPHARMA GROUP PLC | 6,244,897 | $4.4T | 105326.98% | |
| 93 | —PARATEK PHARMACEUTICALS INC | 1,734,037 | $4.4T | 105086.86% | |
| 94 | NVTA1EURINVITAE CORP | 3,241,425 | $4.4T | 104406.15% | |
| 95 | —THESEUS PHARMACEUTICALS INC | 437,329 | $3.9T | 92656.87% | |
| 96 | NVV1NOVAVAX INC | 535,400 | $3.7T | 88525.41% | |
| 97 | FATEFATE THERAPEUTICS INC | 612,215 | $3.5T | 83259.77% | |
| 98 | BEAMBEAM THERAPEUTICS INC | 111,430 | $3.4T | 81407.37% | |
| 99 | TVTX 2.5 09/15/25TRAVERE THERAPEUTICS INC | 3,250,000 | $3.1T | 74595.41% | |
| 100 | ADAPYADAPTIMMUNE THERAPEUTICS PLC | 2,787,845 | $3.0T | 72502.24% |
Page 1 of 2Next