Fund Holdings — Palo Alto Investors LP

Total Portfolio Value
$653.86M
Total Bought
$73.38M
Total Sold
$132.84M
Net Transaction
-$59.45M
Filing Period:
Securities
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SharesValue ($K)
Q4 2025
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Q1 2026
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Change
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Q4 2025
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Q1 2026
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Weight (%)
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Change
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MIRUM PHARMACEUTICALS INC(MIRM)156,421325,175+168,75412,35630,0404.59%+17,684
CELLDEX THERAPEUTICS INC(CLDX)0296,408+296,40809,4021.44%+9,402
UNITED THERAPEUTICS CORP(UTHR)58,18662,809+4,62328,35137,2445.70%+8,893
BICARA THERAPEUTICS INC298,575550,408+251,8335,02510,9481.67%+5,923
ANNEXON INC(ANNX)2,384,1922,948,090+563,89811,96916,3322.50%+4,364
SYNDAX PHARMACEUTICALS INC(SNDX)794,507864,986+70,47916,69320,2063.09%+3,513
IOVANCE BIOTHERAPEUTICS INC(IOVA)7,116,6766,349,563-767,11319,42922,2873.41%+2,858
TRAVERE THERAPEUTICS INC(TVTX)110,719230,453+119,7344,2316,8471.05%+2,616
CYTOKINETICS INC(CYTK)032,195+32,19502,1220.32%+2,122
ANAPTYSBIO INC690,032638,161-51,87133,45335,3925.41%+1,940
ULTRAGENYX PHARMACEUTICAL IN(RARE)461,294596,495+135,20110,61012,4971.91%+1,887
ALKERMES PLC(ALKS)242,560242,56006,7878,5771.31%+1,790
AGIOS PHARMACEUTICALS INC(AGIO)212,499213,601+1,1025,7847,2261.11%+1,442
ACLARIS THERAPEUTICS INC(ACRS)1,566,8401,613,430+46,5904,7166,0500.93%+1,334
VERASTEM INC(VSTM)0246,093+246,09301,3040.20%+1,304
DYNE THERAPEUTICS INC(DYN)1,472,1971,652,972+180,77528,79629,9684.58%+1,172
ORUKA THERAPEUTICS INC(ORKA)59,98559,98501,8182,9420.45%+1,124
MADRIGAL PHARMACEUTICALS INC(MDGL)01,787+1,78709350.14%+935
ALIGN TECHNOLOGY INC41,52041,52006,4837,1181.09%+634
XERIS BIOPHARMA HOLDINGS INC0104,410+104,41006060.09%+606
DISC MEDICINE INC(IRON)317,456401,719+84,26325,20925,6863.93%+477
STOKE THERAPEUTICS INC(STOK)72,02284,631+12,6092,2862,7560.42%+470
CAPRICOR THERAPEUTICS INC(CAPR)226,304229,763+3,4596,5316,9851.07%+454
PYXIS ONCOLOGY INC(PYXS)1,037,4211,010,510-26,9111,1931,4750.23%+282
CAREDX INC(CDNA)478,220531,870+53,6509,0109,2331.41%+224
AKARI THERAPEUTICS PLC-ADR(AKTX)146,0240-146,024420—-42
PROQR THERAPEUTICS NV
SHS EURO
188,807188,80703813060.05%-76
GENERATION BIO CO15,0470-15,047850—-85
ABEONA THERAPEUTICS INC(ABEO)108,865108,86505744880.07%-86
BIONTECH SE-ADR(BNTX)19,61419,61401,8671,7430.27%-124
UROGEN PHARMA LTD(URGN)24,50024,50005744410.07%-133
COMPASS PATHWAYS PLC ADR(CMPS)115,616115,61607986390.10%-158
EDWARDS LIFESCIENCES CORP33,64033,64002,8682,6940.41%-174
NEUROCRINE BIOSCIENCES INC(NBIX)18,11718,11702,5702,3870.37%-183
CRISPR THERAPEUTICS AG(CRSP)41,22639,605-1,6212,1621,8840.29%-278
TAYSHA GENE THERAPIES INC(TSHA)1,183,1951,391,382+208,1876,5086,2190.95%-288
HUMANA INC(HUM)3,9853,98501,0216910.11%-330
INSPIRE MEDICAL SYSTEMS INC(INSP)8,7728,77208094520.07%-357
BICYCLE THERAPEUTICS PLC-ADR221,071201,890-19,1811,5659370.14%-628
PROTHENA CORP PLC
SHS
1,320,5101,208,568-111,94212,61111,7471.80%-864
ALDEYRA THERAPEUTICS INC(ALDX)225,465155,709-69,7561,1682630.04%-905
XENON PHARMACEUTICALS INC(XENE)96,51951,345-45,1744,3262,9860.46%-1,340
ACADIA PHARMACEUTICALS INC2,484,0312,872,695+388,66466,34863,9469.78%-2,402
NUVATION BIO INC(NUVB)538,079508,846-29,2334,8212,1830.33%-2,638
NOVOCURE LTD(NVCR)1,298,9641,280,439-18,52516,79613,9572.13%-2,839
EHEALTH INC(EHTH)1,531,4291,482,797-48,6327,0451,9130.29%-5,132
COMPASS THERAPEUTICS INC(CMPX)2,532,4191,514,504-1,017,91513,5998,0121.23%-5,587
BIOMARIN PHARMACEUTICAL INC(BMRN)746,256685,182-61,07444,35038,7065.92%-5,644
PTC THERAPEUTICS INC(PTCT)903,916921,607+17,69168,66162,7899.60%-5,872
DENALI THERAPEUTICS INC(DNLI)641,239234,582-406,65710,5874,5040.69%-6,083
BIOGEN INC(BIIB)183,571140,719-42,85232,30725,7983.95%-6,509
GOSSAMER BIO INC(GOSS)4,471,5920-4,471,59213,8620—-13,862
INSMED INC(INSM)489,482415,269-74,21385,18967,90510.39%-17,285
AMICUS THERAPEUTICS INC
COM
5,205,7671,113,045-4,092,72274,13016,0952.46%-58,035
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Palo Alto Investors LP — 13F Holdings — Q1 2026 | TickerTrail