Fund Holdings — Palo Alto Investors LP

Total Portfolio Value:
$653.86M
Total Bought:
$73.38M
Total Sold:
$132.84M
Net Transaction:
-$59.45M
Notable People:
Palo Alto Investors Gp Llc
Securities
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SharesValue
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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Insmed Incorporated(INSM)489,482415,269-74,213$85.19M$67.90M10.39%-$17.28M
Acadia Pharmaceuticals Inc2,484,0312,872,695+388,664$66.35M$63.95M9.78%-$2.40M
PTC Therapeutics, Inc.(PTCT)903,916921,607+17,691$68.66M$62.79M9.60%-$5.87M
BioMarin Pharmaceutical Inc.(BMRN)746,256685,182-61,074$44.35M$38.71M5.92%-$5.64M
United Therapeutics Corporation(UTHR)58,18662,809+4,623$28.35M$37.24M5.70%+$8.89M
Anaptysbio Inc690,032638,161-51,871$33.45M$35.39M5.41%+$1.94M
Mirum Pharmaceuticals, Inc.(MIRM)156,421325,175+168,754$12.36M$30.04M4.59%+$17.68M
Dyne Therapeutics, Inc.(DYN)1,472,1971,652,972+180,775$28.80M$29.97M4.58%+$1.17M
Biogen Inc.(BIIB)183,571140,719-42,852$32.31M$25.80M3.95%-$6.51M
Disc Medicine, Inc.(IRON)317,456401,719+84,263$25.21M$25.69M3.93%+$476.7K
Iovance Biotherapeutics, Inc.(IOVA)7,116,6766,349,563-767,113$19.43M$22.29M3.41%+$2.86M
Syndax Pharmaceuticals, Inc.(SNDX)794,507864,986+70,479$16.69M$20.21M3.09%+$3.51M
Annexon, Inc.(ANNX)2,384,1922,948,090+563,898$11.97M$16.33M2.50%+$4.36M
Amicus Therapeutics Inc
COM
5,205,7671,113,045-4,092,722$74.13M$16.09M2.46%-$58.04M
NovoCure Limited(NVCR)1,298,9641,280,439-18,525$16.80M$13.96M2.13%-$2.84M
Ultragenyx Pharmaceutical Inc.(RARE)461,294596,495+135,201$10.61M$12.50M1.91%+$1.89M
Prothena Corp PlcSHS
SHS
1,320,5101,208,568-111,942$12.61M$11.75M1.80%-$863.6K
Bicara Therapeutics Inc298,575550,408+251,833$5.03M$10.95M1.67%+$5.92M
Celldex Therapeutics, Inc.(CLDX)0296,408+296,408$0$9.40M1.44%+$9.40M
CareDx, Inc.(CDNA)478,220531,870+53,650$9.01M$9.23M1.41%+$223.6K
Alkermes plcSHS(ALKS)242,560242,5600$6.79M$8.58M1.31%+$1.79M
Compass Therapeutics, Inc.(CMPX)2,532,4191,514,504-1,017,915$13.60M$8.01M1.23%-$5.59M
Agios Pharmaceuticals, Inc.(AGIO)212,499213,601+1,102$5.78M$7.23M1.11%+$1.44M
Align Technology Inc41,52041,5200$6.48M$7.12M1.09%+$634.4K
Capricor Therapeutics, Inc.(CAPR)226,304229,763+3,459$6.53M$6.98M1.07%+$453.7K
Travere Therapeutics, Inc.(TVTX)110,719230,453+119,734$4.23M$6.85M1.05%+$2.62M
Taysha Gene Therapies, Inc.(TSHA)1,183,1951,391,382+208,187$6.51M$6.22M0.95%-$288.1K
Aclaris Therapeutics, Inc.(ACRS)1,566,8401,613,430+46,590$4.72M$6.05M0.93%+$1.33M
Denali Therapeutics Inc.(DNLI)641,239234,582-406,657$10.59M$4.50M0.69%-$6.08M
Xenon Pharmaceuticals Inc.(XENE)96,51951,345-45,174$4.33M$2.99M0.46%-$1.34M
Oruka Therapeutics, Inc.(ORKA)59,98559,9850$1.82M$2.94M0.45%+$1.12M
Stoke Therapeutics, Inc.(STOK)72,02284,631+12,609$2.29M$2.76M0.42%+$469.6K
Edwards Lifesciences Corp33,64033,6400$2.87M$2.69M0.41%-$173.9K
Neurocrine Biosciences, Inc.(NBIX)18,11718,1170$2.57M$2.39M0.37%-$182.8K
Nuvation Bio Inc.CL A(NUVB)538,079508,846-29,233$4.82M$2.18M0.33%-$2.64M
Cytokinetics, Incorporated(CYTK)032,195+32,195$0$2.12M0.32%+$2.12M
eHealth, Inc.(EHTH)1,531,4291,482,797-48,632$7.04M$1.91M0.29%-$5.13M
CRISPR Therapeutics AGNAMEN AKT(CRSP)41,22639,605-1,621$2.16M$1.88M0.29%-$277.9K
BioNTech SEADS(BNTX)19,61419,6140$1.87M$1.74M0.27%-$124.0K
Pyxis Oncology, Inc.(PYXS)1,037,4211,010,510-26,911$1.19M$1.48M0.23%+$282.3K
Verastem, Inc.(VSTM)0246,093+246,093$0$1.30M0.20%+$1.30M
Bicycle Therapeutics Plc-AdrADS221,071201,890-19,181$1.57M$936.8K0.14%-$628.4K
Madrigal Pharmaceuticals, Inc.(MDGL)01,787+1,787$0$935.4K0.14%+$935.4K
Humana Inc.(HUM)3,9853,9850$1.02M$691.0K0.11%-$329.7K
COMPASS Pathways plcADS(CMPS)115,616115,6160$797.8K$639.4K0.10%-$158.4K
Xeris Biopharma Holdings Inc0104,410+104,410$0$605.6K0.09%+$605.6K
Abeona Therapeutics Inc.(ABEO)108,865108,8650$573.7K$487.7K0.07%-$86.0K
Inspire Medical Systems, Inc.(INSP)8,7728,7720$809.0K$452.5K0.07%-$356.6K
UroGen Pharma Ltd.(URGN)24,50024,5000$573.8K$440.5K0.07%-$133.3K
Proqr Therapeutics NvSHS EURO
SHS EURO
188,807188,8070$381.4K$305.9K0.05%-$75.5K
Aldeyra Therapeutics, Inc.(ALDX)225,465155,709-69,756$1.17M$263.1K0.04%-$904.8K
Akari Therapeutics, Plc(AKTX)146,0240-146,024$42.2K$0—-$42.2K
Generation Bio Co15,0470-15,047$85.5K$0—-$85.5K
Gossamer Bio, Inc.(GOSS)4,471,5920-4,471,592$13.86M$0—-$13.86M
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Palo Alto Investors LP — 13F Holdings — Q1 2026 | TickerTrail