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EcoR1 Capital, LLC

Q2 2026 · Filed 2026-08-14
Market Value
$2.0B
-14.2%
Holdings
37
-1
New Purchases
8
Added To
3
Closed
7
Reduced
4
Top 10 Concentration
88.4%
Turnover
40.5%

Top Buys (by % of Portfolio)

SymbolCur %Prior %Chg %Value
ANAB 26.48% 18.68% +7.80% $532M
ZYME 29.89% 24.58% +5.31% $600M
AKTS 7.74% 3.69% +4.05% $155M
TRAX 3.18% 0.00% +3.18% $64M
CGON 5.29% 3.19% +2.10% $106M
ETON 3.91% 2.29% +1.62% $79M
FULC 1.19% 0.00% +1.19% $24M
LEGN 1.15% 0.00% +1.15% $23M
STOK 1.20% 0.14% +1.06% $24M
CRSP 3.77% 2.82% +0.95% $76M
NGNE 1.99% 1.10% +0.90% $40M
ATRA 0.89% 0.02% +0.87% $18M
AURA 0.59% 0.00% +0.59% $12M
ODTX 0.52% 0.00% +0.52% $10M
LKFT 2.49% 2.14% +0.35% $50M

Top Sells (by % of Portfolio)

SymbolCur %Prior %Chg %Value
JAZZ 0.00% 13.79% -13.79% $0
CNTA 0.00% 10.18% -10.18% $0
CRNX 0.00% 6.66% -6.66% $0
XNCR 0.00% 1.13% -1.13% $0
REPL 0.00% 0.33% -0.33% $0
ERAS 0.30% 0.62% -0.32% $6M
MREO 0.02% 0.19% -0.17% $318K
RLAY 0.65% 0.81% -0.16% $13M
PRLD 0.00% 0.14% -0.14% $0
IBIO 0.00% 0.13% -0.13% $0
ORIC 3.63% 3.64% -0.02% $73M
BBOT 1.07% 1.08% -0.01% $22M

Sector Allocation Over Time

Market Cap Concentration

TierHoldingsValueWeight
Large Cap 1 $0 0.0%
Mid Cap 9 $252M 12.6%
Small Cap 18 $1.7B 84.8%
Micro Cap 9 $52M 2.6%

Portfolio Analytics

Avg Market Cap
$2.2B
Median Market Cap
$1.2B
Avg P/E
47.2
Median P/E
15.5
Avg Dividend Yield
—%
Avg Beta
0.63
# Stocks
37
# ETFs / Funds
0

Top Holdings (37 total)

# Symbol % Port Shares Value Avg Price Q/Q Value Chg Share Chg Chg % Status
1 ZYME 29.89% 22,970,388 $600M $26.14 $25M — —
2 ANAB 26.48% 7,880,094 $532M $67.50 $95M — —
3 AKTS 7.74% 4,824,469 $155M $32.23 $69M — —
4 CGON 5.29% 1,494,300 $106M $71.05 $32M +392,300 +35.6%
5 ETON 3.91% 2,171,938 $79M $36.20 $25M — —
6 CRSP 3.77% 1,389,276 $76M $54.54 $10M — —
7 ORIC 3.63% 6,728,116 $73M $10.83 -$12M — —
8 TRAX 3.18% 3,174,519 $64M $20.12 — +3,174,519 — NEW
9 LKFT 2.49% 1,667,119 $50M $29.98 -$33K — —
10 NGNE 1.99% 1,271,342 $40M $31.45 $14M — —
11 STOK 1.20% 735,000 $24M $32.72 $21M +635,000 +635.0%
12 FULC 1.19% 6,549,866 $24M $3.66 — +6,549,866 — NEW
13 LEGN 1.15% 800,000 $23M $28.88 — +800,000 — NEW
14 BBOT 1.07% 2,823,126 $22M $7.62 -$4M — —
15 MBX 1.07% 388,500 $21M $55.20 -$2M -388,500 -50.0%
16 ZBIO 1.00% 789,500 $20M $25.38 $5M — —
17 ATRA 0.89% 1,552,000 $18M $11.48 $17M +1,452,407 +1458.3%
18 RLAY 0.65% 697,948 $13M $18.71 -$6M -1,206,814 -63.4%
19 AURA 0.59% 1,666,667 $12M $7.10 — +1,666,667 — NEW
20 ODTX 0.52% 555,555 $10M $18.71 — +555,555 — NEW
21 EIKN 0.48% 732,606 $10M $13.05 $2M — —
22 ZURA 0.35% 1,179,715 $7M $5.90 -$59K — —
23 PHAT 0.34% 625,000 $7M $10.85 -$162K — —
24 NRIX 0.33% 270,000 $7M $24.26 — +270,000 — NEW
25 ERAS 0.30% 330,000 $6M $18.32 -$9M -570,000 -63.3%
26 ELOX 0.28% 400,000 $6M $13.88 — +400,000 — NEW
27 AARD 0.11% 396,194 $2M $5.76 — +396,194 — NEW
28 HLXC 0.11% 200,000 $2M $10.64 $96K — —
29 MREO 0.02% 1,000,000 $318K $0.32 -$4M -12,368,855 -92.5%
30 SRZNW 0.01% 4,444 $115K $25.95 -$14K — —
31 CNTA —% — — — -$238M -6,000,000 -100.0% SOLD
32 JAZZ —% — — — -$323M -1,706,469 -100.0% SOLD
33 REPL —% — — — -$8M -1,000,000 -100.0% SOLD
34 XNCR —% — — — -$26M -2,183,000 -100.0% SOLD
35 CRNX —% — — — -$156M -4,288,120 -100.0% SOLD
36 PRLD —% — — — -$3M -947,049 -100.0% SOLD
37 IBIO —% — — — -$3M -1,583,000 -100.0% SOLD

New Positions

SymbolValue% Port
TRAX $64M 3.18%
FULC $24M 1.19%
LEGN $23M 1.15%
AURA $12M 0.59%
ODTX $10M 0.52%
NRIX $7M 0.33%
ELOX $6M 0.28%
AARD $2M 0.11%

Sold Out Positions

SymbolValue% Port
IBIO — —%
JAZZ — —%
PRLD — —%
XNCR — —%
REPL — —%
CRNX — —%
CNTA — —%
View SEC EDGAR Filings for EcoR1 Capital, LLC →

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