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Palo Alto Investors LP

Q2 2026 · Filed 2026-08-19
Market Value
$783M
+22.0%
Holdings
52
+2
New Purchases
3
Added To
5
Closed
2
Reduced
14
Top 10 Concentration
62.1%
Turnover
9.6%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
ACHC 9.26% 0.00% +9.26% $72M
TRAX 1.55% 0.00% +1.55% $12M
RARE 2.55% 1.95% +0.60% $20M
MIRM 5.22% 4.68% +0.54% $41M
CDNA 1.94% 1.44% +0.50% $15M
CLDX 1.90% 1.47% +0.44% $15M
CMPX 1.63% 1.25% +0.38% $13M
BCAX 2.09% 1.71% +0.38% $16M
NVCR 2.48% 2.18% +0.30% $19M
ALKS 1.62% 1.34% +0.29% $13M
SGMT 0.25% 0.00% +0.25% $2M
TSHA 1.21% 0.97% +0.24% $9M
TVTX 1.22% 1.07% +0.15% $10M
ACRS 1.09% 0.94% +0.15% $9M
CMPS 0.21% 0.10% +0.11% $2M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
INSM 5.64% 10.58% -4.94% $44M
FOLD 0.00% 2.51% -2.51% $0
UTHR 4.33% 5.80% -1.47% $34M
BMRN 4.99% 6.03% -1.04% $39M
SNDX 2.42% 3.15% -0.73% $19M
ACAD 9.26% 9.97% -0.71% $72M
DNLI 0.00% 0.70% -0.70% $0
IOVA 2.82% 3.47% -0.66% $22M
ALGN 0.68% 1.11% -0.43% $5M
ANNX 2.15% 2.55% -0.39% $17M
CAPR 0.71% 1.09% -0.38% $6M
ANAB 5.21% 5.52% -0.31% $41M
PTCT 9.58% 9.79% -0.21% $75M
BIIB 3.87% 4.02% -0.15% $30M
AGIO 1.01% 1.13% -0.11% $8M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Large Cap 10 $163M 20.9%
Mid Cap 18 $414M 52.9%
Small Cap 16 $184M 23.5%
Micro Cap 8 $22M 2.8%

Portfolio Analytics

Avg Market Cap
$6.7B
Median Market Cap
$2.3B
Avg P/E
42.0
Median P/E
28.1
Avg Dividend Yield
0.00%
Avg Beta
0.92
# Stocks
52
# ETFs / Funds
0

Top Holdings (52 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 PTCT 9.58% 918,846 $75M $81.57 $12M -2,761 -0.3%
2 ACAD 9.26% 2,864,096 $72M $25.30 $9M -8,599 -0.3%
3 ACHC 9.26% 2,864,096 $72M $25.30 — +2,864,096 — NEW
4 INSM 5.64% 413,980 $44M $106.62 -$24M -1,289 -0.3%
5 MIRM 5.22% 348,808 $41M $117.07 $11M +23,633 +7.3%
6 ANAB 5.21% 603,489 $41M $67.50 $5M -34,672 -5.4%
7 BMRN 4.99% 682,777 $39M $57.22 $363K -2,405 -0.3%
8 DYN 4.68% 1,647,521 $37M $22.21 $7M -5,451 -0.3%
9 UTHR 4.33% 62,587 $34M $541.83 -$3M -222 -0.3%
10 IRON 3.89% 416,646 $30M $73.14 $5M +14,927 +3.7%
11 BIIB 3.87% 140,279 $30M $216.06 $5M -440 -0.3%
12 IOVA 2.82% 5,296,209 $22M $4.16 -$255K -1,053,354 -16.6%
13 RARE 2.55% 596,495 $20M $33.39 $7M — —
14 NVCR 2.48% 1,280,439 $19M $15.15 $5M — —
15 SNDX 2.42% 864,986 $19M $21.86 -$1M — —
16 ANNX 2.15% 2,948,090 $17M $5.71 $501K — —
17 BCAX 2.09% 550,408 $16M $29.69 $5M — —
18 CDNA 1.94% 531,870 $15M $28.50 $6M — —
19 CLDX 1.90% 399,856 $15M $37.21 $5M +103,448 +34.9%
20 CMPX 1.63% 5,831,813 $13M $2.19 $5M +4,317,309 +285.1%
21 ALKS 1.62% 242,560 $13M $52.39 $4M — —
22 TRAX 1.55% 603,489 $12M $20.12 — +603,489 — NEW
23 TVTX 1.22% 167,525 $10M $56.81 $3M -62,928 -27.3%
24 TSHA 1.21% 1,391,382 $9M $6.81 $3M — —
25 ACRS 1.09% 1,613,430 $9M $5.29 $2M — —
26 AGIO 1.01% 213,601 $8M $37.11 $701K — —
27 CAPR 0.71% 229,763 $6M $24.08 -$1M — —
28 ALGN 0.68% 31,389 $5M $168.66 -$2M -10,131 -24.4%
29 ORKA 0.41% 33,546 $3M $95.17 $250K -26,439 -44.1%
30 XENE 0.40% 51,345 $3M $60.36 $113K — —
31 NBIX 0.39% 18,117 $3M $168.54 $667K — —
32 EW 0.39% 33,640 $3M $90.46 $349K — —
33 STOK 0.35% 84,631 $3M $32.72 $14K — —
34 CYTK 0.35% 32,195 $3M $85.19 $621K — —
35 PYXS 0.33% 864,277 $3M $3.01 $1M -146,233 -14.5%
36 EHTH 0.28% 1,482,797 $2M $1.49 $297K — —
37 CRSP 0.28% 39,605 $2M $54.54 $276K — —
38 SGMT 0.25% 250,000 $2M $7.73 — +250,000 — NEW
39 NUVB 0.24% 326,609 $2M $5.68 -$328K -182,237 -35.8%
40 BNTX 0.23% 19,614 $2M $93.05 $82K — —
41 CMPS 0.21% 115,616 $2M $14.15 $997K — —
42 HUM 0.20% 3,985 $2M $397.22 $892K — —
43 VSTM 0.15% 309,685 $1M $3.82 -$121K +63,592 +25.8%
44 MDGL 0.12% 1,787 $960K $536.95 $24K — —
45 BCYC 0.11% 201,890 $856K $4.24 -$81K — —
46 XERS 0.11% 104,410 $827K $7.92 $221K — —
47 ABEO 0.09% 108,865 $673K $6.18 $185K — —
48 INSP 0.05% 8,772 $391K $44.61 -$61K — —
49 PRQR 0.04% 188,807 $351K $1.86 $45K — —
50 ALDX 0.04% 155,709 $332K $2.13 $69K — —
51 FOLD —% — — — -$16M -1,113,045 -100.0% SOLD
52 DNLI —% — — — -$5M -234,582 -100.0% SOLD

New Positions

SymbolValue% Port
ACHC $72M 9.26%
TRAX $12M 1.55%
SGMT $2M 0.25%

Sold Out Positions

SymbolValue% Port
DNLI — —%
FOLD — —%
View SEC EDGAR Filings for Palo Alto Investors LP →

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For informational purposes only. Not investment advice. Data sourced from SEC filings. Privacy Terms