Fund Holdings — Palo Alto Investors LP

Total Portfolio Value:
$718.35M
Total Bought:
$134.26M
Total Sold:
$89.03M
Net Transaction:
+$45.23M
Notable People:
Palo Alto Investors Gp Llc
Securities
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SharesValue
Q3 2025
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Q4 2025
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Change
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Q3 2025
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Q4 2025
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Weight (%)
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Change
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Insmed Incorporated(INSM)491,805489,482-2,323$70.82M$85.19M11.86%+$14.36M
Amicus Therapeutics Inc
COM
5,367,7985,205,767-162,031$42.30M$74.13M10.32%+$31.83M
PTC Therapeutics, Inc.(PTCT)862,613903,916+41,303$52.94M$68.66M9.56%+$15.72M
Acadia Pharmaceuticals Inc2,466,6842,484,031+17,347$52.64M$66.35M9.24%+$13.71M
BioMarin Pharmaceutical Inc.(BMRN)754,007746,256-7,751$40.84M$44.35M6.17%+$3.51M
Anaptysbio Inc673,520690,032+16,512$20.62M$33.45M4.66%+$12.83M
Biogen Inc.ADS(BIIB)185,661183,571-2,090$26.01M$32.31M4.50%+$6.30M
Dyne Therapeutics, Inc.ADS(DYN)1,262,6741,472,197+209,523$15.97M$28.80M4.01%+$12.82M
United Therapeutics Corporation(UTHR)58,18658,1860$24.39M$28.35M3.95%+$3.96M
Disc Medicine, Inc.(IRON)224,300317,456+93,156$14.82M$25.21M3.51%+$10.39M
Iovance Biotherapeutics, Inc.(IOVA)7,618,1327,116,676-501,456$16.53M$19.43M2.70%+$2.90M
NovoCure Limited(NVCR)1,256,1591,298,964+42,805$16.23M$16.80M2.34%+$566.0K
Syndax Pharmaceuticals, Inc.(SNDX)654,930794,507+139,577$10.08M$16.69M2.32%+$6.62M
Gossamer Bio, Inc.(GOSS)5,464,3494,471,592-992,757$14.37M$13.86M1.93%-$509.3K
Compass Therapeutics, Inc.(CMPX)02,532,419+2,532,419$0$13.60M1.89%+$13.60M
Prothena Corp PlcCL A
SHS
1,324,0281,320,510-3,518$12.92M$12.61M1.76%-$311.6K
Mirum Pharmaceuticals, Inc.(MIRM)64,700156,421+91,721$4.74M$12.36M1.72%+$7.61M
Annexon, Inc.(ANNX)02,384,192+2,384,192$0$11.97M1.67%+$11.97M
Ultragenyx Pharmaceutical Inc.(RARE)369,531461,294+91,763$11.12M$10.61M1.48%-$505.7K
Denali Therapeutics Inc.(DNLI)408,006641,239+233,233$5.92M$10.59M1.47%+$4.66M
CareDx, Inc.(CDNA)316,204478,220+162,016$4.60M$9.01M1.25%+$4.41M
eHealth, Inc.(EHTH)1,544,6191,531,429-13,190$6.66M$7.04M0.98%+$387.3K
Alkermes plc(ALKS)183,938242,560+58,622$5.52M$6.79M0.94%+$1.27M
Capricor Therapeutics, Inc.(CAPR)0226,304+226,304$0$6.53M0.91%+$6.53M
Taysha Gene Therapies, Inc.(TSHA)1,246,0331,183,195-62,838$4.07M$6.51M0.91%+$2.43M
Align Technology Inc45,73541,520-4,215$5.73M$6.48M0.90%+$756.4K
Agios Pharmaceuticals, Inc.(AGIO)265,497212,499-52,998$10.66M$5.78M0.81%-$4.87M
Bicara Therapeutics Inc0298,575+298,575$0$5.03M0.70%+$5.03M
Nuvation Bio Inc.CL A(NUVB)1,020,547538,079-482,468$3.78M$4.82M0.67%+$1.05M
Aclaris Therapeutics, Inc.(ACRS)1,566,8401,566,8400$2.98M$4.72M0.66%+$1.74M
Xenon Pharmaceuticals Inc.(XENE)096,519+96,519$0$4.33M0.60%+$4.33M
Travere Therapeutics, Inc.(TVTX)110,719110,7190$2.65M$4.23M0.59%+$1.58M
Edwards Lifesciences Corp33,64033,6400$2.62M$2.87M0.40%+$251.6K
Neurocrine Biosciences, Inc.(NBIX)18,11718,1170$2.54M$2.57M0.36%+$26.3K
Stoke Therapeutics, Inc.(STOK)105,42772,022-33,405$2.48M$2.29M0.32%-$191.6K
CRISPR Therapeutics AGNAMEN AKT(CRSP)41,22641,2260$2.67M$2.16M0.30%-$510.0K
BioNTech SE(BNTX)19,61419,6140$1.93M$1.87M0.26%-$67.1K
Oruka Therapeutics, Inc.(ORKA)59,98559,9850$791.3K$1.82M0.25%+$1.03M
Bicycle Therapeutics Plc-Adr221,071221,0710$1.71M$1.57M0.22%-$145.9K
Pyxis Oncology, Inc.(PYXS)1,037,4211,037,4210$2.30M$1.19M0.17%-$1.11M
Aldeyra Therapeutics, Inc.ADR(ALDX)225,465225,4650$1.18M$1.17M0.16%-$9.0K
Humana Inc.(HUM)3,9853,9850$1.04M$1.02M0.14%-$16.1K
Inspire Medical Systems, Inc.(INSP)08,772+8,772$0$809.0K0.11%+$809.0K
COMPASS Pathways plcADS(CMPS)0115,616+115,616$0$797.8K0.11%+$797.8K
UroGen Pharma Ltd.(URGN)24,50024,5000$488.8K$573.8K0.08%+$85.0K
Abeona Therapeutics Inc.(ABEO)108,865108,8650$574.8K$573.7K0.08%-$1.1K
Proqr Therapeutics NvSHS EURO
SHS EURO
188,807188,8070$402.2K$381.4K0.05%-$20.8K
Generation Bio Co015,047+15,047$0$85.5K0.01%+$85.5K
Akari Therapeutics, Plc(AKTX)146,024146,0240$147.5K$42.2K0.01%-$105.3K
Alnylam Pharmaceuticals, Inc.(ALNY)32,3200-32,320$14.74M$0—-$14.74M
Avidity Biosciences Inc109,8310-109,831$4.79M$0—-$4.79M
Generation Bio Co15,0470-15,047$92.1K$0—-$92.1K
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Palo Alto Investors LP — 13F Holdings — Q4 2025 | TickerTrail