WL
Insider
White Mountains Insurance Group Ltd
10% ownerWhite Mountains Insurance Group Ltd (10% owner) filed 1 Form 4 report as a reporting entity in the trailing twelve months (0 purchases, 1 sale), most often in MediaAlpha, Inc. (MAX). The largest single filing was $76.5M of MAX (5,500,391 sh × $13.90, as filed), executed Nov 4. 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
1
0 buys · 1 sells
Median delay
–
measured on stock purchases
Volume, ttmiDollar value disclosed in the trailing twelve months
$76.5M
shares × price, as filed
Last traded
Nov 4
Filed Nov 5
Median ADV $10.8M across their filed names
Open performance→Volume by month
Buys $0
Sells $76.5M
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Communication Services
1 filing
Sector per market data · by filing · past 12 months
Most traded names
MAXRecent filings
MAXSALE
MediaAlpha, Inc.
View filing →
$76.5M5,500,391 sh × $13.90
Exec Nov 4
Filed Nov 5 · 9:04 PM ET