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  • PALO ALTO INVESTORS LP (Data extracted from 13F, 13D, 13G and Form 4)

PALO ALTO INVESTORS LP

AUM: $1.06 B
13-F Portfolio Value: $723.72 M
Last 13-F Filed: Q2 2026
Concentration in top 10: 61.29%
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Stock Company % Portfolio Shares Held Market Value Change in Shares % Change Quarter End Price Source
PTCTPTC THERAPEUTICS INC10.36%918,846$74,950,268-2,761-0.3%$81.5713F
ACADACADIA PHARMACEUTICALS INC10.01%2,864,096$72,461,629-8,599-0.3%$25.313F
INSMINSMED INC6.1%413,980$44,138,548-1,289-0.31%$106.6213F
MIRMMIRUM PHARMACEUTICALS INC5.64%348,808$40,834,95323,6337.27%$117.0713F
ANABANAPTYSBIO INC5.63%603,489$40,735,508-34,672-5.43%$67.513F
BMRNBIOMARIN PHARMACEUTICAL INC5.4%682,777$39,068,500-2,405-0.35%$57.2213F
DYNDYNE THERAPEUTICS INC5.06%1,647,521$36,591,441-5,451-0.33%$22.2113F
UTHRUNITED THERAPEUTICS CORP4.69%62,587$33,911,514-222-0.35%$541.8313F
IRONDISC MEDICINE INC4.21%416,646$30,473,48814,9273.72%$73.1413F
BIIBBIOGEN INC4.19%140,279$30,308,681-440-0.31%$216.0613F
IOVAIOVANCE BIOTHERAPEUTICS INC3.04%5,296,209$22,032,229-1,053,354-16.59%$4.1613F
RAREULTRAGENYX PHARMACEUTICAL IN2.75%596,495$19,916,968No Change$33.3913F
NVCRNOVOCURE LTD2.68%1,280,439$19,398,651No Change$15.1513F
SNDXSYNDAX PHARMACEUTICALS INC2.61%864,986$18,908,594No Change$21.8613F
ANNXANNEXON INC2.33%2,948,090$16,833,594No Change$5.7113F
BCAXBICARA THERAPEUTICS INC2.26%550,408$16,341,614No Change$29.6913F
CDNACAREDX INC2.09%531,870$15,158,295No Change$28.513F
CLDXCELLDEX THERAPEUTICS INC2.06%399,856$14,878,642103,44834.9%$37.2113F
CMPXCOMPASS THERAPEUTICS INC1.76%5,831,813$12,771,6704,317,309285.06%$2.1913F
ALKSALKERMES PLC1.76%242,560$12,708,931No Change$52.3913F
TRAXFIRST TRACKS BIOTHERAPEUTICS1.68%603,489$12,142,199603,489New$20.1213F
PRTAPROTHENA CORP PLC1.55%1,143,155$11,191,487-65,413-5.41%$9.7913F
TVTXTRAVERE THERAPEUTICS INC1.32%167,525$9,517,095-62,928-27.31%$56.8113F
TSHATAYSHA GENE THERAPIES INC1.31%1,391,382$9,475,311No Change$6.8113F
ACRSACLARIS THERAPEUTICS INC1.18%1,613,430$8,535,045No Change$5.2913F
AGIOAGIOS PHARMACEUTICALS INC1.1%213,601$7,926,733No Change$37.1113F
CAPRCAPRICOR THERAPEUTICS INC0.76%229,763$5,532,693No Change$24.0813F
ALGNALIGN TECHNOLOGY INC0.73%31,389$5,294,069-10,131-24.4%$168.6613F
ORKAORUKA THERAPEUTICS INC - Restricted0.44%33,546$3,192,573-26,439-44.08%$95.1713F
XENEXENON PHARMACEUTICALS INC0.43%51,345$3,099,184No Change$60.3613F
EWEDWARDS LIFESCIENCES CORP0.42%33,640$3,043,074No Change$90.4613F
NBIXNEUROCRINE BIOSCIENCES INC0.42%18,117$3,053,349No Change$168.5413F
CYTKCYTOKINETICS INC0.38%32,195$2,742,692No Change$85.1913F
STOKSTOKE THERAPEUTICS INC0.38%84,631$2,769,126No Change$32.7213F
PYXSPYXIS ONCOLOGY INC0.36%864,277$2,601,474-146,233-14.47%$3.0113F
EHTHEHEALTH INC0.31%1,482,797$2,209,368No Change$1.4913F
CRSPCRISPR THERAPEUTICS AG0.3%39,605$2,160,057No Change$54.5413F
SGMTSAGIMET BIOSCIENCES INC-A0.27%250,000$1,932,500250,000New$7.7313F
NUVBNUVATION BIO INC0.26%326,609$1,855,139-182,237-35.81%$5.6813F
BNTXBIONTECH SE-ADR0.25%19,614$1,825,083No Change$93.0513F
CMPSCOMPASS PATHWAYS PLC ADR0.23%115,616$1,635,966No Change$14.1513F
HUMHUMANA INC0.22%3,985$1,582,922No Change$397.2213F
NAMSNEWAMSTERDAM PHARMA CO NV0.21%44,359$1,503,32744,359New$33.8913F
VSTMVERASTEM INC0.16%309,685$1,182,99763,59225.84%$3.8213F
MDGLMADRIGAL PHARMACEUTICALS INC0.13%1,787$959,530No Change$536.9513F
BCYCBICYCLE THERAPEUTICS PLC-ADR0.12%201,890$856,014No Change$4.2413F
URGNUROGEN PHARMA LTD0.12%24,500$901,600No Change$36.813F
XERSXERIS BIOPHARMA HOLDINGS INC0.11%104,410$826,927No Change$7.9213F
ABEOABEONA THERAPEUTICS INC0.09%108,865$672,786No Change$6.1813F
ALDXALDEYRA THERAPEUTICS INC0.05%155,709$331,660No Change$2.1313F
INSPINSPIRE MEDICAL SYSTEMS INC0.05%8,772$391,319No Change$44.6113F
PRQRPROQR THERAPEUTICS NV0.05%188,807$351,181No Change$1.8613F
FOLDAMICUS THERAPEUTICS INC-1,113,045Exited13F
DNLIDENALI THERAPEUTICS INC-234,582Exited13F