EL
Insider
EcoR1 Capital, LLC
DirectorEcoR1 Capital, LLC (Director) filed 2 Form 4 reports as a reporting entity in the trailing twelve months (2 purchases, 0 sales), most often in Zymeworks Inc. (ZYME). Across 2 priced purchase filings, the average 21-session return was +2.8% from execution and -5.0% from disclosure (delay-adjusted; derived). The largest single filing was $40.0M of AKTS (2,222,222 sh across 2 lots, as filed), executed Jan 12. Data as of Nov 8 2026.
Add to watchlistReturn, ttmiAverage return per filing, trailing twelve months
+2.8%
avg across 2 priced filings
Delay-adjustediThe same average, entered at disclosure dates
-5.0%
same 2 filings, from disclosure
Filings, ttm
2
2 buys · 0 sells
Median delay
2d
execution → disclosure
Volume, ttmiDollar value disclosed in the trailing twelve months
$44.7M
shares × price, as filed
Last traded
May 7
Filed May 11
Median ADV $18.1M across their filed names
Impact on $10,000 · 12M
$8,773 (-12.3%)
S&P 500 $10,907 (+9.1%) · 21.3 pts behind
EcoR1 Capital, LLC
S&P 500
Derived: compounded across filings from disclosure dates · past 12 months
Open performance→Volume by month
Buys $125.6M
Sells $57.6M
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Healthcare
2 filings
Sector per market data · by filing · past 12 months
Most traded names
ZYME
Zymeworks Inc.
ZYME · 12 buys · 0 sells
12 filings
ADAP
ADAP
0 buys · 1 sell
1 filing
AKTSRecent filings
ZYMEPURCHASE
Zymeworks Inc.
View filing →
$1.2M97,349 sh across 2 lots
Exec Mar 25 2025
Filed Mar 27 2025 · 5:30 PM ET ZYMEPURCHASE Zymeworks Inc. View filing → $1.6M
127,198 sh across 3 lots
Exec Mar 20 2025
Filed Mar 24 2025 · 5:30 PM ET ZYMEPURCHASE Zymeworks Inc. View filing → $2.9M
228,463 sh across 3 lots
Exec Mar 17 2025
Filed Mar 19 2025 · 5:30 PM ET ZYMEPURCHASE Zymeworks Inc. View filing → $2.0M
141,429 sh across 2 lots
Exec Jan 16 2025
Filed Jan 21 2025 · 5:30 PM ET ZYMEPURCHASE Zymeworks Inc. View filing → $2.3M
167,654 sh across 3 lots
Exec Jan 13 2025
Filed Jan 15 2025 · 5:30 PM ET ZYMEPURCHASE Zymeworks Inc. View filing → $3.0M
225,119 sh across 2 lots
Exec Jan 8 2025
Filed Jan 10 2025 · 5:30 PM ET ZYMEPURCHASE Zymeworks Inc. View filing → $5.3M
363,369 sh across 3 lots
Exec Dec 30 2024
Filed Jan 2 2025 · 5:30 PM ET ANABPURCHASE AnaptysBio, Inc. View filing → $1.0M
78,452 sh across 2 lots
Exec Dec 30 2024
Filed Jan 2 2025 · 5:30 PM ET More filings →