Palo Alto Investors LP Long-Term Concentrated

Location: Palo Alto, CA

CIK: 0001306923 · Show all filings

Period: Q3 2025 (← Previous) (Next →)

Filing Date: Nov 14, 2025

Total Value: $540M (100.0% shares, 0.0% debt)

Holdings (44)

INSM INSMED INC 13.1%
Value $70.82M Shares 491,805 Share Price $144.01 * Est. Cost/Share $17.79 Unrealized @ Report Date +588.6%
PTCT PTC THERAPEUTICS INC 9.8%
Value $52.94M Shares 862,613 Share Price $61.37 * Est. Cost/Share $44.98 Unrealized @ Report Date +15.8%
ACAD ACADIA PHARMACEUTICALS INC 9.7%
Value $52.64M Shares 2,466,684 Share Price $21.34 * Est. Cost/Share $26.96 Unrealized @ Report Date -12.3%
FOLD AMICUS THERAPEUTICS INC 7.8%
Value $42.3M Shares 5,367,798 Share Price $7.88 * Est. Cost/Share $9.63 Unrealized @ Report Date -26.1%
BMRN BIOMARIN PHARMACEUTICAL INC 7.6%
Value $40.84M Shares 754,007 Share Price $54.16 * Est. Cost/Share $83.16 Unrealized @ Report Date -31.2%
BIIB BIOGEN INC 4.8%
Value $26.01M Shares 185,661 Share Price $140.08 * Est. Cost/Share $256.18 Unrealized @ Report Date -47.2%
UTHR UNITED THERAPEUTICS CORP 4.5%
Value $24.39M Shares 58,186 Share Price $419.21 * Est. Cost/Share $89.23 Unrealized @ Report Date +276.9%
ANAB ANAPTYSBIO INC 3.8%
Value $20.62M Shares 673,520 Share Price $30.62 * Est. Cost/Share $19.30 Unrealized @ Report Date +18.9%
IOVA IOVANCE BIOTHERAPEUTICS INC 3.1%
Value $16.53M Shares 7,618,132 Share Price $2.17 * Est. Cost/Share $4.09 Unrealized @ Report Date -42.2%
NVCR NOVOCURE LTD 3.0%
Value $16.23M Shares 1,256,159 Share Price $12.92 * Est. Cost/Share $35.67 Unrealized @ Report Date -62.5%
DYN DYNE THERAPEUTICS INC 3.0%
Value $15.97M Shares 1,262,674 Share Price $12.65 * Est. Cost/Share $12.01 Unrealized @ Report Date -5.1%
IRON DISC MEDICINE INC 2.7%
Value $14.82M Shares 224,300 Share Price $66.08 * Est. Cost/Share $51.36 Unrealized @ Report Date +15.8%
ALNY ALNYLAM PHARMACEUTICALS INC 2.7%
Value $14.74M Shares 32,320 Share Price $456.00 * Est. Cost/Share $260.36 Unrealized @ Report Date +56.4%
GOSS GOSSAMER BIO INC 2.7%
Value $14.37M Shares 5,464,349 Share Price $2.63 * Est. Cost/Share $1.58 Unrealized @ Report Date +39.6%
PRTA PROTHENA CORP PLC 2.4%
Value $12.92M Shares 1,324,028 Share Price $9.76 * Est. Cost/Share $20.95 Unrealized @ Report Date -63.3%
RARE ULTRAGENYX PHARMACEUTICAL IN 2.1%
Value $11.12M Shares 369,531 Share Price $30.08 Est. Cost/Share $30.79 Unrealized @ Report Date -2.6%
AGIO AGIOS PHARMACEUTICALS INC 2.0%
Value $10.66M Shares 265,497 Share Price $40.14 * Est. Cost/Share $33.17 Unrealized @ Report Date +13.4%
SNDX SYNDAX PHARMACEUTICALS INC 1.9%
Value $10.08M Shares 654,930 Share Price $15.38 * Est. Cost/Share $15.47 Unrealized @ Report Date -15.4%
EHTH EHEALTH INC 1.2%
Value $6.657M Shares 1,544,619 Share Price $4.31 * Est. Cost/Share $38.13 Unrealized @ Report Date -89.9%
DNLI DENALI THERAPEUTICS INC 1.1%
Value $5.924M Shares 408,006 Share Price $14.52 Est. Cost/Share $14.20 Unrealized @ Report Date +1.2%
ALGN ALIGN TECHNOLOGY INC 1.1%
Value $5.727M Shares 45,735 Share Price $125.22 * Est. Cost/Share $150.48 Unrealized @ Report Date +4.1%
ALKS ALKERMES PLC 1.0%
Value $5.518M Shares 183,938 Share Price $30.00 * Est. Cost/Share $22.36 Unrealized @ Report Date +26.1%
RNAM AVIDITY BIOSCIENCES INC 0.9%
Value $4.785M Shares 109,831 Share Price $43.57 * Est. Cost/Share $29.81 Unrealized @ Report Date +35.6%
MIRM MIRUM PHARMACEUTICALS INC 0.9%
Value $4.743M Shares 64,700 Share Price $73.31 * Est. Cost/Share $15.56 Unrealized @ Report Date +308.6%
CDNA CAREDX INC 0.9%
Value $4.598M Shares 316,204 Share Price $14.54 Est. Cost/Share $14.26 Unrealized @ Report Date 0.0%
TSHA TAYSHA GENE THERAPIES INC 0.8%
Value $4.075M Shares 1,246,033 Share Price $3.27 * Est. Cost/Share $1.87 Unrealized @ Report Date +51.1%
NUVB NUVATION BIO INC 0.7%
Value $3.776M Shares 1,020,547 Share Price $3.70 * Est. Cost/Share $2.12 Unrealized @ Report Date +28.8%
ACRS ACLARIS THERAPEUTICS INC 0.6%
Value $2.977M Shares 1,566,840 Share Price $1.90 * Est. Cost/Share $1.44 Unrealized @ Report Date +21.0%
CRSP CRISPR THERAPEUTICS AG 0.5%
Value $2.672M Shares 41,226 Share Price $64.81 * Est. Cost/Share $38.70 Unrealized @ Report Date +48.4%
TVTX TRAVERE THERAPEUTICS INC 0.5%
Value $2.646M Shares 110,719 Share Price $23.90 * Est. Cost/Share $23.56 Unrealized @ Report Date -20.2%
EW EDWARDS LIFESCIENCES CORP 0.5%
Value $2.616M Shares 33,640 Share Price $77.77 Est. Cost/Share $72.66 Unrealized @ Report Date +7.5%
NBIX NEUROCRINE BIOSCIENCES INC 0.5%
Value $2.543M Shares 18,117 Share Price $140.38 * Est. Cost/Share $129.01 Unrealized @ Report Date +5.0%
STOK STOKE THERAPEUTICS INC 0.5%
Value $2.478M Shares 105,427 Share Price $23.50 * Est. Cost/Share $6.06 Unrealized @ Report Date +182.8%
PYXS PYXIS ONCOLOGY INC 0.4%
Value $2.303M Shares 1,037,421 Share Price $2.22 * Est. Cost/Share $2.98 Unrealized @ Report Date -51.8%
BNTX BIONTECH SE-ADR 0.4%
Value $1.934M Shares 19,614 Share Price $98.62 Est. Cost/Share $118.77 Unrealized @ Report Date —
BCYC BICYCLE THERAPEUTICS PLC-ADR 0.3%
Value $1.711M Shares 221,071 Share Price $7.74 Est. Cost/Share $16.07 Unrealized @ Report Date —
ALDX ALDEYRA THERAPEUTICS INC 0.2%
Value $1.177M Shares 225,465 Share Price $5.22 Est. Cost/Share $5.95 Unrealized @ Report Date -12.3%
HUM HUMANA INC 0.2%
Value $1.037M Shares 3,985 Share Price $260.17 Est. Cost/Share $369.63 Unrealized @ Report Date -29.3%
ORKA ORUKA THERAPEUTICS INC 0.1%
Value $791K Shares 59,985 Share Price $13.19 * Est. Cost/Share $14.82 Unrealized @ Report Date 0.0%
ABEO ABEONA THERAPEUTICS INC 0.1%
Value $575K Shares 108,865 Share Price $5.28 * Est. Cost/Share $6.04 Unrealized @ Report Date +4.9%
URGN UROGEN PHARMA LTD 0.1%
Value $489K Shares 24,500 Share Price $19.95 * Est. Cost/Share $27.01 Unrealized @ Report Date -33.5%
PRQR PROQR THERAPEUTICS NV 0.1%
Value $402K Shares 188,807 Share Price $2.13 * Est. Cost/Share $2.18 Unrealized @ Report Date 0.0%
AKTX AKARI THERAPEUTICS PLC-ADR 0.0%
Value $147K Shares 146,024 Share Price $1.01 Est. Cost/Share $1.22 Unrealized @ Report Date —
— GENERATION BIO CO 0.0%
Value $92,088 Shares 15,047 Share Price $6.12 Est. Cost/Share $2.82 Unrealized @ Report Date —