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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 →
$308K4,003 sh across 2 lots
Exec Jan 8
Filed Jan 12 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $377K
4,880 sh across 3 lots
Exec Jan 6
Filed Jan 8 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $139K
1,843 sh × $75.64
Exec Nov 17 2025
Filed Nov 19 2025 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $110K
1,757 sh × $62.89
Exec Oct 7 2025
Filed Oct 9 2025 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $1.3M
20,390 sh across 5 lots
Exec Oct 3 2025
Filed Oct 7 2025 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $2.7M
44,781 sh across 4 lots
Exec Sep 11 2025
Filed Sep 15 2025 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $137K
2,813 sh × $48.58
Exec Aug 15 2025
Filed Aug 19 2025 · 5:30 PM ET PTCTSALE PTC Therapeutics, Inc. View filing → $827K
15,521 sh across 2 lots
Exec Mar 12 2025
Filed Mar 14 2025 · 5:30 PM ET More filings →