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Palo Alto Investors LP

Q1 2026 · Filed 2026-05-15
Market Value
$642M
-7.2%
Holdings
50
+3
New Purchases
5
Added To
17
Closed
1
Reduced
16
Top 10 Concentration
65.1%
Turnover
12.0%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
MIRM 4.68% 1.79% +2.89% $30M
UTHR 5.80% 4.10% +1.70% $37M
CLDX 1.47% 0.00% +1.47% $9M
BCAX 1.71% 0.73% +0.98% $11M
ANNX 2.55% 1.73% +0.81% $16M
SNDX 3.15% 2.41% +0.73% $20M
ANAB 5.52% 4.84% +0.68% $35M
IOVA 3.47% 2.81% +0.66% $22M
DYN 4.67% 4.17% +0.50% $30M
TVTX 1.07% 0.61% +0.46% $7M
RARE 1.95% 1.53% +0.41% $12M
ACAD 9.97% 9.60% +0.37% $64M
IRON 4.00% 3.65% +0.36% $26M
ALKS 1.34% 0.98% +0.35% $9M
CYTK 0.33% 0.00% +0.33% $2M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
FOLD 2.51% 10.72% -8.22% $16M
INSM 10.58% 12.32% -1.74% $68M
DNLI 0.70% 1.53% -0.83% $5M
EHTH 0.30% 1.02% -0.72% $2M
CMPX 1.25% 1.97% -0.72% $8M
BIIB 4.02% 4.67% -0.65% $26M
BMRN 6.03% 6.42% -0.38% $39M
NUVB 0.34% 0.70% -0.36% $2M
NVCR 2.18% 2.43% -0.25% $14M
XENE 0.47% 0.63% -0.16% $3M
PTCT 9.79% 9.93% -0.15% $63M
ALDX 0.04% 0.17% -0.13% $263K
BCYC 0.15% 0.23% -0.08% $937K
INSP 0.07% 0.12% -0.05% $452K
HUM 0.11% 0.15% -0.04% $691K

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Large Cap 10 $185M 28.9%
Mid Cap 17 $300M 46.7%
Small Cap 15 $143M 22.3%
Micro Cap 8 $13M 2.1%

Portfolio Analytics

Avg Market Cap
$6.9B
Median Market Cap
$2.3B
Avg P/E
42.0
Median P/E
28.1
Avg Dividend Yield
0.00%
Avg Beta
0.85
# Stocks
50
# ETFs / Funds
0

Top Holdings (50 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 INSM 10.58% 415,269 $68M $163.52 -$17M -74,213 -15.2%
2 ACAD 9.97% 2,872,695 $64M $22.26 -$2M +388,664 +15.7%
3 PTCT 9.79% 921,607 $63M $68.13 -$6M +17,691 +2.0%
4 BMRN 6.03% 685,182 $39M $56.49 -$6M -61,074 -8.2%
5 UTHR 5.80% 62,809 $37M $592.98 $9M +4,623 +8.0%
6 ANAB 5.52% 638,161 $35M $55.46 $2M -51,871 -7.5%
7 MIRM 4.68% 325,175 $30M $92.38 $18M +168,754 +107.9%
8 DYN 4.67% 1,652,972 $30M $18.13 $1M +180,775 +12.3%
9 BIIB 4.02% 140,719 $26M $183.33 -$7M -42,852 -23.3%
10 IRON 4.00% 401,719 $26M $63.94 $477K +84,263 +26.5%
11 IOVA 3.47% 6,349,563 $22M $3.51 $3M -767,113 -10.8%
12 SNDX 3.15% 864,986 $20M $23.36 $4M +70,479 +8.9%
13 ANNX 2.55% 2,948,090 $16M $5.54 $4M +563,898 +23.6%
14 FOLD 2.51% 1,113,045 $16M $14.46 -$58M -4,092,722 -78.6%
15 NVCR 2.18% 1,280,439 $14M $10.90 -$3M -18,525 -1.4%
16 RARE 1.95% 596,495 $12M $20.95 $2M +135,201 +29.3%
17 BCAX 1.71% 550,408 $11M $19.89 $6M +251,833 +84.3%
18 CLDX 1.47% 296,408 $9M $31.72 — +296,408 — NEW
19 CDNA 1.44% 531,870 $9M $17.36 $224K +53,650 +11.2%
20 ALKS 1.34% 242,560 $9M $35.36 $2M — —
21 CMPX 1.25% 1,514,504 $8M $5.29 -$6M -1,017,915 -40.2%
22 AGIO 1.13% 213,601 $7M $33.83 $1M +1,102 +0.5%
23 ALGN 1.11% 41,520 $7M $171.43 $634K — —
24 CAPR 1.09% 229,763 $7M $30.40 $454K +3,459 +1.5%
25 TVTX 1.07% 230,453 $7M $29.71 $3M +119,734 +108.1%
26 TSHA 0.97% 1,391,382 $6M $4.47 -$288K +208,187 +17.6%
27 ACRS 0.94% 1,613,430 $6M $3.75 $1M +46,590 +3.0%
28 DNLI 0.70% 234,582 $5M $19.20 -$6M -406,657 -63.4%
29 XENE 0.47% 51,345 $3M $58.15 -$1M -45,174 -46.8%
30 ORKA 0.46% 59,985 $3M $49.05 $1M — —
31 STOK 0.43% 84,631 $3M $32.56 $470K +12,609 +17.5%
32 EW 0.42% 33,640 $3M $80.08 -$174K — —
33 NBIX 0.37% 18,117 $2M $131.74 -$183K — —
34 NUVB 0.34% 508,846 $2M $4.29 -$3M -29,233 -5.4%
35 CYTK 0.33% 32,195 $2M $65.91 — +32,195 — NEW
36 EHTH 0.30% 1,482,797 $2M $1.29 -$5M -48,632 -3.2%
37 CRSP 0.29% 39,605 $2M $47.57 -$278K -1,621 -3.9%
38 BNTX 0.27% 19,614 $2M $88.88 -$124K — —
39 PYXS 0.23% 1,010,510 $1M $1.46 $282K -26,911 -2.6%
40 VSTM 0.20% 246,093 $1M $5.30 — +246,093 — NEW
41 BCYC 0.15% 201,890 $937K $4.64 -$628K -19,181 -8.7%
42 MDGL 0.15% 1,787 $935K $523.47 — +1,787 — NEW
43 HUM 0.11% 3,985 $691K $173.39 -$330K — —
44 CMPS 0.10% 115,616 $639K $5.53 -$158K — —
45 XERS 0.09% 104,410 $606K $5.80 — +104,410 — NEW
46 ABEO 0.08% 108,865 $488K $4.48 -$86K — —
47 INSP 0.07% 8,772 $452K $51.58 -$357K — —
48 PRQR 0.05% 188,807 $306K $1.62 -$76K — —
49 ALDX 0.04% 155,709 $263K $1.69 -$905K -69,756 -30.9%
50 GBIO —% — — — -$85K -15,047 -100.0% SOLD

New Positions

SymbolValue% Port
CLDX $9M 1.47%
CYTK $2M 0.33%
VSTM $1M 0.20%
MDGL $935K 0.15%
XERS $606K 0.09%

Sold Out Positions

SymbolValue% Port
GBIO — —%
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