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Palo Alto Investors LP

Q4 2025 · Filed 2026-02-17
Market Value
$691M
+34.9%
Holdings
47
+4
New Purchases
8
Added To
12
Closed
2
Reduced
11
Top 10 Concentration
70.4%
Turnover
21.3%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
FOLD 10.72% 8.26% +2.47% $74M
CMPX 1.97% 0.00% +1.97% $14M
ANNX 1.73% 0.00% +1.73% $12M
DYN 4.17% 3.12% +1.05% $29M
CAPR 0.94% 0.00% +0.94% $7M
MIRM 1.79% 0.93% +0.86% $12M
ANAB 4.84% 4.03% +0.81% $33M
IRON 3.65% 2.89% +0.75% $25M
BCAX 0.73% 0.00% +0.73% $5M
XENE 0.63% 0.00% +0.63% $4M
SNDX 2.41% 1.97% +0.45% $17M
CDNA 1.30% 0.90% +0.41% $9M
DNLI 1.53% 1.16% +0.38% $11M
TSHA 0.94% 0.80% +0.15% $7M
INSP 0.12% 0.00% +0.12% $809K

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
ALNY 0.00% 2.88% -2.88% $0
BMRN 6.42% 7.97% -1.55% $44M
INSM 12.32% 13.82% -1.50% $85M
AGIO 0.84% 2.08% -1.24% $6M
RNAM 0.00% 0.93% -0.93% $0
NVCR 2.43% 3.17% -0.74% $17M
ACAD 9.60% 10.27% -0.68% $66M
UTHR 4.10% 4.76% -0.66% $28M
RARE 1.53% 2.17% -0.63% $11M
IOVA 2.81% 3.23% -0.42% $19M
BIIB 4.67% 5.08% -0.40% $32M
PTCT 9.93% 10.33% -0.40% $69M
EHTH 1.02% 1.30% -0.28% $7M
PYXS 0.17% 0.45% -0.28% $1M
CRSP 0.31% 0.52% -0.21% $2M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Large Cap 11 $205M 29.7%
Mid Cap 15 $335M 48.4%
Small Cap 13 $126M 18.2%
Micro Cap 8 $26M 3.7%

Portfolio Analytics

Avg Market Cap
$7.7B
Median Market Cap
$2.8B
Avg P/E
41.5
Median P/E
31.2
Avg Dividend Yield
0.00%
Avg Beta
0.90
# Stocks
47
# ETFs / Funds
0

Top Holdings (47 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 INSM 12.32% 489,482 $85M $174.04 $14M -2,323 -0.5%
2 FOLD 10.72% 5,205,767 $74M $14.24 $32M -162,031 -3.0%
3 PTCT 9.93% 903,916 $69M $75.96 $16M +41,303 +4.8%
4 ACAD 9.60% 2,484,031 $66M $26.71 $14M +17,347 +0.7%
5 BMRN 6.42% 746,256 $44M $59.43 $4M -7,751 -1.0%
6 ANAB 4.84% 690,032 $33M $48.48 $13M +16,512 +2.5%
7 BIIB 4.67% 183,571 $32M $175.99 $6M -2,090 -1.1%
8 DYN 4.17% 1,472,197 $29M $19.56 $13M +209,523 +16.6%
9 UTHR 4.10% 58,186 $28M $487.25 $4M — —
10 IRON 3.65% 317,456 $25M $79.41 $10M +93,156 +41.5%
11 IOVA 2.81% 7,116,676 $19M $2.73 $3M -501,456 -6.6%
12 NVCR 2.43% 1,298,964 $17M $12.93 $566K +42,805 +3.4%
13 SNDX 2.41% 794,507 $17M $21.01 $7M +139,577 +21.3%
14 CMPX 1.97% 2,532,419 $14M $5.37 — +2,532,419 — NEW
15 MIRM 1.79% 156,421 $12M $78.99 $8M +91,721 +141.8%
16 ANNX 1.73% 2,384,192 $12M $5.02 — +2,384,192 — NEW
17 RARE 1.53% 461,294 $11M $23.00 -$506K +91,763 +24.8%
18 DNLI 1.53% 641,239 $11M $16.51 $5M +233,233 +57.2%
19 CDNA 1.30% 478,220 $9M $18.84 $4M +162,016 +51.2%
20 EHTH 1.02% 1,531,429 $7M $4.60 $387K -13,190 -0.8%
21 ALKS 0.98% 242,560 $7M $27.98 $1M +58,622 +31.9%
22 CAPR 0.94% 226,304 $7M $28.86 — +226,304 — NEW
23 TSHA 0.94% 1,183,195 $7M $5.50 $2M -62,838 -5.0%
24 ALGN 0.94% 41,520 $6M $156.15 $756K -4,215 -9.2%
25 AGIO 0.84% 212,499 $6M $27.22 -$5M -52,998 -20.0%
26 BCAX 0.73% 298,575 $5M $16.83 — +298,575 — NEW
27 NUVB 0.70% 538,079 $5M $8.96 $1M -482,468 -47.3%
28 ACRS 0.68% 1,566,840 $5M $3.01 $2M — —
29 XENE 0.63% 96,519 $4M $44.82 — +96,519 — NEW
30 TVTX 0.61% 110,719 $4M $38.21 $2M — —
31 EW 0.41% 33,640 $3M $85.25 $252K — —
32 NBIX 0.37% 18,117 $3M $141.83 $26K — —
33 STOK 0.33% 72,022 $2M $31.74 -$192K -33,405 -31.7%
34 CRSP 0.31% 41,226 $2M $52.44 -$510K — —
35 BNTX 0.27% 19,614 $2M $95.20 -$67K — —
36 ORKA 0.26% 59,985 $2M $30.31 $1M — —
37 BCYC 0.23% 221,071 $2M $7.08 -$146K — —
38 PYXS 0.17% 1,037,421 $1M $1.15 -$1M — —
39 ALDX 0.17% 225,465 $1M $5.18 -$9K — —
40 HUM 0.15% 3,985 $1M $256.13 -$16K — —
41 INSP 0.12% 8,772 $809K $92.23 — +8,772 — NEW
42 CMPS 0.12% 115,616 $798K $6.90 — +115,616 — NEW
43 ABEO 0.08% 108,865 $574K $5.27 -$1K — —
44 PRQR 0.06% 188,807 $381K $2.02 -$21K — —
45 GBIO 0.01% 15,047 $85K $5.68 — +15,047 — NEW
46 RNAM —% — — — -$5M -109,831 -100.0% SOLD
47 ALNY —% — — — -$15M -32,320 -100.0% SOLD

New Positions

SymbolValue% Port
CMPX $14M 1.97%
ANNX $12M 1.73%
CAPR $7M 0.94%
BCAX $5M 0.73%
XENE $4M 0.63%
INSP $809K 0.12%
CMPS $798K 0.12%
GBIO $85K 0.01%

Sold Out Positions

SymbolValue% Port
ALNY — —%
RNAM — —%
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