JB
Insider
James Bylund
Chief Operating OfficerJames Bylund (Chief Operating Officer) filed 1 Form 4 report in the trailing twelve months (0 purchases, 1 sale), most often in Repligen Corporation (RGEN). The largest single filing was $331K of RGEN (2,191 sh × $151.21, as filed), executed Nov 18 2025.
Add to watchlistReturn, ttmiAverage return per filing, trailing twelve months
–
no purchases on file
Delay-adjustediThe same average, entered at disclosure dates
–
returns measure stock purchases only
Filings, ttm
1
0 buys · 1 sells
Median delay
–
execution → disclosure
Volume, ttmiDollar value disclosed in the trailing twelve months
$331K
shares × price, as filed
Last traded
Nov 18 2025
Filed Nov 19 2025
Median ADV $191.8M across their filed names
Open performance→Volume by month
Buys $0
Sells $331K
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Healthcare
1 filing
Sector per market data · by filing · past 12 months
Most traded names
RGENRecent filings
RGENSALE
Repligen Corporation
View filing →
$331K2,191 sh × $151.21
Exec Nov 18 2025
Filed Nov 19 2025 · 5:30 PM ET