CB
Christopher D. Brown (Director) filed 9 Form 4 reports in the trailing twelve months (0 purchases, 9 sales), most often in 908 Devices Inc. (MASS). The largest single filing was $357K of MASS (30,000 sh × $11.89, as filed), executed Oct 7. Data as of Nov 8 2026.
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
9
0 buys · 9 sells
Median delay
–
measured on stock purchases
Volume, ttmiDollar value disclosed in the trailing twelve months
$2.2M
shares × price, as filed
Last traded
Nov 4
Filed Nov 6
Median ADV $3.5M across their filed names
Open performance→Volume by month
Buys $0
Sells $2.2M
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Healthcare
9 filings
Sector per market data · by filing · past 12 months
Most traded names
MASSRecent filings
MASSSALE
908 Devices Inc.
View filing →
$230K32,608 sh across 2 lots
Exec Apr 8
Filed Apr 10 · 5:30 PM ET