Arkolith/Insider Trading/WTM/Form 4/A

Campbell Reid Tarlton

DirectorWHITE MOUNTAINS INSURANCE GROUP LTD (WTM) · full profile →Form 4/A · 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$10.3M10K

Transaction Codes

S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4/A filing (accession 0000776867-25-000032) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4/A XML