Arkolith/Insider Trading/WTM/Form 4

Rountree George Manning

Chief Executive Officer, DirectorWHITE MOUNTAINS INSURANCE GROUP LTD (WTM) · full profile →Form 4 · filed Dec 22, 2025
Net Selling
Open-Market Buys
$0
Open-Market Sells
$10.3M
Net Open-Market Flow
-$10.3M
Transactions
1
1 non-derivative · 0 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Dec 19, 2025Sell(S)5K$2050.00$10.3M14K

Transaction Codes

S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0000776867-25-000029) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML