MB
Mark Elliott Boulding (EXEC. VP AND CLO) filed 11 Form 4 reports in the trailing twelve months (0 purchases, 11 sales), most often in PTC Therapeutics, Inc. (PTCT). The largest single filing was $798K of PTCT (10,153 sh across 3 lots, as filed), executed Jun 17. 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
11
0 buys · 11 sells
Median delay
–
measured on stock purchases
Volume, ttmiDollar value disclosed in the trailing twelve months
$2.7M
shares × price, as filed
Last traded
Oct 5
Filed Oct 7
Median ADV $125.1M across their filed names
Open performance→Volume by month
Buys $0
Sells $16.8M
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Healthcare
11 filings
Sector per market data · by filing · past 12 months
Most traded names
PTCTRecent filings
PTCTSALE
PTC Therapeutics, Inc.
View filing →
$3.9M73,701 sh across 5 lots
Exec Mar 10 2025
Filed Mar 12 2025 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $4.9M
93,815 sh across 4 lots
Exec Dec 2 2024
Filed Dec 4 2024 · 5:30 PM ET