SEC Form 4 reporting owner
Rountree George Manning
Rountree George Manning has filed 1 Form 4 transaction reported between December 19, 2025 and December 19, 2025, as Chief Executive Officer of WHITE MOUNTAINS INSURANCE GROUP LTD.
Name as filed: Rountree George Manning
Roles and reported holdings
Transaction history
All 1 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.
How this page is built
Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.
Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.
This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.