SM
Insider
Stephen M Mason
CEO, GMPD SegmentStephen M Mason (CEO, GMPD Segment) filed 1 Form 4 report in the trailing twelve months (0 purchases, 1 sale), most often in Cardinal Health, Inc. (CAH). The largest single filing was $8.3M of CAH (35,000 sh across 4 lots, as filed), executed Aug 18.
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
$8.3M
shares × price, as filed
Last traded
Aug 18
Filed Aug 20
Median ADV $564.3M across their filed names
Open performance→Volume by month
Buys $0
Sells $14.5M
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
CAHRecent filings
CAHSALE
Cardinal Health, Inc.
View filing →
$8.3M35,000 sh across 4 lots
Exec Aug 18
Filed Aug 20 · 7:30 AM ET CAHSALE Cardinal Health, Inc. View filing → $6.2M
41,575 sh across 3 lots
Exec Aug 19 2025
Filed Aug 19 2025 · 5:30 PM ET