Palo Alto Investors LP Long-Term Concentrated

Location: PALO ALTO, CA

CIK: 0001306923 · Show all filings

Period: Q1 2026 (← Previous)

Filing Date: May 15, 2026

Total Value: $654M (100.0% shares, 0.0% debt)

Holdings (51)

Increased Positions (16)

MIRM MIRUM PHARMACEUTICALS INC 4.6%
Value $30.04M (+143.1%) Shares 325,175 (+107.9%) Est. Cost $73.46 Unrealized +31.5%
UTHR UNITED THERAPEUTICS CORP 5.7%
Value $37.24M (+31.4%) Shares 62,809 (+7.9%) Est. Cost $118.03 Unrealized +307.1%
BCAX BICARA THERAPEUTICS INC 1.7%
Value $10.95M (+117.9%) Shares 550,408 (+84.3%) Est. Cost $16.72 Unrealized -2.6%
PTCT PTC THERAPEUTICS INC 9.6%
Value $62.79M (-8.6%) Shares 921,607 (+2.0%) Est. Cost $46.78 Unrealized +57.6%
ANNX ANNEXON INC 2.5%
Value $16.33M (+36.5%) Shares 2,948,090 (+23.7%) Est. Cost $4.19 Unrealized +37.1%
SNDX SYNDAX PHARMACEUTICALS INC 3.1%
Value $20.21M (+21.0%) Shares 864,986 (+8.9%) Est. Cost $16.22 Unrealized +28.0%
TVTX TRAVERE THERAPEUTICS INC 1.0%
Value $6.847M (+61.8%) Shares 230,453 (+108.1%) Est. Cost $27.44 Unrealized +13.1%
ACAD ACADIA PHARMACEUTICALS INC 9.8%
Value $63.95M (-3.6%) Shares 2,872,695 (+15.6%) Est. Cost $26.72 Unrealized -5.7%
RARE ULTRAGENYX PHARMACEUTICAL IN 1.9%
Value $12.5M (+17.8%) Shares 596,495 (+29.3%) Est. Cost $29.43 Unrealized -20.6%
ACRS ACLARIS THERAPEUTICS INC 0.9%
Value $6.05M (+28.3%) Shares 1,613,430 (+3.0%) Est. Cost $1.50 Unrealized +122.7%
DYN DYNE THERAPEUTICS INC 4.6%
Value $29.97M (+4.1%) Shares 1,652,972 (+12.3%) Est. Cost $13.45 Unrealized +27.3%
IRON DISC MEDICINE INC 3.9%
Value $25.69M (+1.9%) Shares 401,719 (+26.5%) Est. Cost $63.80 Unrealized +16.1%
STOK STOKE THERAPEUTICS INC 0.4%
Value $2.756M (+20.5%) Shares 84,631 (+17.5%) Est. Cost $9.90 Unrealized +221.6%
CAPR CAPRICOR THERAPEUTICS INC 1.1%
Value $6.985M (+6.9%) Shares 229,763 (+1.5%) Est. Cost $13.24 Unrealized +88.0%
TSHA TAYSHA GENE THERAPIES INC 1.0%
Value $6.219M (-4.4%) Shares 1,391,382 (+17.6%) Est. Cost $2.31 Unrealized +106.4%
CDNA CAREDX INC 1.4%
Value $9.233M (+2.5%) Shares 531,870 (+11.2%) Est. Cost $15.56 Unrealized +26.5%

Decreased Positions (17)

FOLD AMICUS THERAPEUTICS INC 2.5%
Value $16.09M (-78.3%) Shares 1,113,045 (-78.6%) Est. Cost $9.63 Unrealized +48.6%
INSM INSMED INC 10.4%
Value $67.9M (-20.3%) Shares 415,269 (-15.2%) Est. Cost $17.79 Unrealized +793.9%
BIIB BIOGEN INC 3.9%
Value $25.8M (-20.1%) Shares 140,719 (-23.3%) Est. Cost $256.18 Unrealized -28.5%
DNLI DENALI THERAPEUTICS INC 0.7%
Value $4.504M (-57.5%) Shares 234,582 (-63.4%) Est. Cost $15.17 Unrealized +29.4%
BMRN BIOMARIN PHARMACEUTICAL INC 5.9%
Value $38.71M (-12.7%) Shares 685,182 (-8.2%) Est. Cost $83.16 Unrealized -29.4%
CMPX COMPASS THERAPEUTICS INC 1.2%
Value $8.012M (-41.1%) Shares 1,514,504 (-40.2%) Est. Cost $4.62 Unrealized +29.9%
EHTH EHEALTH INC 0.3%
Value $1.913M (-72.8%) Shares 1,482,797 (-3.2%) Est. Cost $38.13 Unrealized -92.6%
IOVA IOVANCE BIOTHERAPEUTICS INC 3.4%
Value $22.29M (+14.7%) Shares 6,349,563 (-10.8%) Est. Cost $4.09 Unrealized -34.4%
NVCR NOVOCURE LTD 2.1%
Value $13.96M (-16.9%) Shares 1,280,439 (-1.4%) Est. Cost $34.92 Unrealized -64.0%
NUVB NUVATION BIO INC 0.3%
Value $2.183M (-54.7%) Shares 508,846 (-5.4%) Est. Cost $2.12 Unrealized +192.4%
ANAB ANAPTYSBIO INC 5.4%
Value $35.39M (+5.8%) Shares 638,161 (-7.5%) Est. Cost $19.77 Unrealized +149.7%
XENE XENON PHARMACEUTICALS INC 0.5%
Value $2.986M (-31.0%) Shares 51,345 (-46.8%) Est. Cost $42.00 Unrealized -0.0%
ALDX ALDEYRA THERAPEUTICS INC 0.0%
Value $263K (-77.5%) Shares 155,709 (-30.9%) Est. Cost $5.95 Unrealized -16.6%
PRTA PROTHENA CORP PLC 1.8%
Value $11.75M (-6.8%) Shares 1,208,568 (-8.5%) Est. Cost $20.95 Unrealized -56.5%
BCYC BICYCLE THERAPEUTICS PLC-ADR 0.1%
Value $937K (-40.1%) Shares 201,890 (-8.7%) Est. Cost $16.07 Unrealized
PYXS PYXIS ONCOLOGY INC 0.2%
Value $1.475M (+23.7%) Shares 1,010,510 (-2.6%) Est. Cost $2.98 Unrealized -48.7%
CRSP CRISPR THERAPEUTICS AG 0.3%
Value $1.884M (-12.9%) Shares 39,605 (-3.9%) Est. Cost $38.70 Unrealized +38.2%

Unchanged Positions (13)