13FBOX
Palo Alto Investors LP · 13F Holdings
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Palo Alto Investors LP

No.3518 Data as of 2026Q2
Latest AUM (Q2 2026)
$684.3M
QoQ Change Q1 2026
+$30.4M+4.7%
Holdings
52
New Buys
5
Adds
4
Reduces
14
Exits
4
Unchanged
29
Holdings Value Trend
Holdings by Sector
Stock Ownership TrendPortfolio %Prev Q %Q2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
PTC THERAPEUTICS INCPTCT
10.95%9.6%$75.0M918,846$62.8M921,607-2,761-0.30%Reduce
ACADIA HEALTHCARE COMPANY INACHC
10.59%$72.5M2.9M$00+2.9MNew Buy
INSMED INCINSM
6.45%10.39%$44.1M413,980$67.9M415,269-1,289-0.31%Reduce
AANAPTYSBIO INCANAB
5.95%5.41%$40.7M603,489$35.4M638,161-34,672-5.43%Reduce
BIOMARIN PHARMACEUTICAL INCBMRN
5.71%5.92%$39.1M682,777$38.7M685,182-2,405-0.35%Reduce
DDYNE THERAPEUTICS INCDYN
5.35%4.58%$36.6M1.6M$30.0M1.7M-5,451-0.33%Reduce
UNITED THERAPEUTICS CORP DELUTHR
4.96%5.7%$33.9M62,587$37.2M62,809-222-0.35%Reduce
DISC MEDICINE INCIRON
4.45%3.93%$30.5M416,646$25.7M401,719+14,927+3.72%Add
BIOGEN INCBIIB
4.43%3.95%$30.3M140,279$25.8M140,719-440-0.31%Reduce
IIOVANCE BIOTHERAPEUTICS INCIOVA
3.22%3.41%$22.0M5.3M$22.3M6.3M-1.1M-16.59%Reduce
UULTRAGENYX PHARMACEUTICAL INRARE
2.91%1.91%$19.9M596,495$12.5M596,49500.00%Unchanged
NNOVOCURE LTDNVCR
2.83%2.13%$19.4M1.3M$14.0M1.3M00.00%Unchanged
SYNDAX PHARMACEUTICALS INCSNDX
2.76%3.09%$18.9M864,986$20.2M864,98600.00%Unchanged
ANNEXON INCANNX
2.46%2.5%$16.8M2.9M$16.3M2.9M00.00%Unchanged
BBICARA THERAPEUTICS INCBCAX
2.39%1.67%$16.3M550,408$10.9M550,40800.00%Unchanged
CCAREDX INCCDNA
2.22%1.41%$15.2M531,870$9.2M531,87000.00%Unchanged
CCELLDEX THERAPEUTICS INC NEWCLDX
2.17%1.44%$14.9M399,856$9.4M296,408+103,448+34.90%Add
CCOMPASS THERAPEUTICS INCCMPX
1.87%1.23%$12.8M5.8M$8.0M1.5M+4.3M+285.06%Add
ALKERMES PLCALKS
1.86%1.31%$12.7M242,560$8.6M242,56000.00%Unchanged
FFIRST TRACKS BIOTHERAPEUTICSTRAX
1.77%$12.1M603,489$00+603,489New Buy
PROTHENA CORP PLCPRTA
1.64%1.8%$11.2M1.1M$11.7M1.2M-65,413-5.41%Reduce
TTRAVERE THERAPEUTICS INCTVTX
1.39%1.05%$9.5M167,525$6.8M230,453-62,928-27.31%Reduce
TAYSHA GENE THERAPIES INCTSHA
1.38%0.95%$9.5M1.4M$6.2M1.4M00.00%Unchanged
AACLARIS THERAPEUTICS INC COMACRS
1.25%0.93%$8.5M1.6M$6.1M1.6M00.00%Unchanged
AGIOS PHARMACEUTICALS INCAGIO
1.16%1.11%$7.9M213,601$7.2M213,60100.00%Unchanged
CCAPRICOR THERAPEUTICS INC COM NEWCAPR
0.81%1.07%$5.5M229,763$7.0M229,76300.00%Unchanged
ALIGN TECHNOLOGY INC COM USD0.0001ALGN
0.77%1.09%$5.3M31,389$7.1M41,520-10,131-24.40%Reduce
OORUKA THERAPEUTICS INC COMORKA
0.47%0.45%$3.2M33,546$2.9M59,985-26,439-44.08%Reduce
XENON PHARMACEUTICALS INCXENE
0.45%0.46%$3.1M51,345$3.0M51,34500.00%Unchanged
NEUROCRINE BIOSCIENCES INCNBIX
0.45%0.37%$3.1M18,117$2.4M18,11700.00%Unchanged
EDWARDS LIFESCIENCES CORPEW
0.44%0.41%$3.0M33,640$2.7M33,64000.00%Unchanged
STOKE THERAPEUTICS INCSTOK
0.4%0.42%$2.8M84,631$2.8M84,63100.00%Unchanged
CYTOKINETICS INCCYTK
0.4%0.32%$2.7M32,195$2.1M32,19500.00%Unchanged
PPYXIS ONCOLOGY INC COMMON STOCKPYXS
0.38%0.23%$2.6M864,277$1.5M1.0M-146,233-14.47%Reduce
EEHEALTH INC COMEHTH
0.32%0.29%$2.2M1.5M$1.9M1.5M00.00%Unchanged
CRISPR THERAPEUTICSCRSP
0.32%0.29%$2.2M39,605$1.9M39,60500.00%Unchanged
SSAGIMET BIOSCIENCES INCSGMT
0.28%$1.9M250,000$00+250,000New Buy
NNUVATION BIO INCNUVB
0.27%0.33%$1.9M326,609$2.2M508,846-182,237-35.81%Reduce
BIONTECH SE FUNSPONSORED ADR 1 ADR REPS 1 ORD SHSBNTX
0.27%0.27%$1.8M19,614$1.7M19,61400.00%Unchanged
COMPASS PATHWAYS ADR A FUNSPONSORED ADR 1 ADR REPS 1 ORD SHSCMPS
0.24%0.1%$1.6M115,616$639,356115,61600.00%Unchanged
HUMANA INC COMHUM
0.23%0.11%$1.6M3,985$690,9593,98500.00%Unchanged
NNEWAMSTERDAM PHARMA COMPANYNAMS
0.22%$1.5M44,359$00+44,359New Buy
MMIRUM PHARMACEUTICALSMIRM
0.2%$1.4M348,808$00+348,808New Buy
VVERASTEM INC COM NEWVSTM
0.17%0.2%$1.2M309,685$1.3M246,093+63,592+25.84%Add
MADRIGAL PHARMACEUTICALS INCMDGL
0.14%0.14%$959,5301,787$935,4411,78700.00%Unchanged
UUROGEN PHARMA LTDURGN
0.13%0.07%$901,60024,500$440,51024,50000.00%Unchanged
BICYCLE THERAPEUTICS PLC SPON ADS EACH REP 1 ORD SHSBCYC
0.13%0.14%$856,014201,890$936,770201,89000.00%Unchanged
XERIS BIOPHARMA HLDGS INXERS
0.12%0.09%$826,927104,410$605,578104,41000.00%Unchanged
AABEONA THERAPEUTICS INC COM NEWABEO
0.1%0.07%$672,786108,865$487,715108,86500.00%Unchanged
IINSPIRE MED SYS INCINSP
0.06%0.07%$391,3198,772$452,4608,77200.00%Unchanged

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow