WTM insider trading — White Mountains Insurance Group Ltd
No open-market insider purchases or sales were filed for White Mountains Insurance Group Ltd (WTM) in the last 90 days. Other insider transactions — such as stock awards, option exercises or tax withholding — are listed below.
Updated Oct 16, 2026.
Recent WTM insider transactions
Every Form 4 filed by White Mountains Insurance Group Ltd officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 31, 2026 | Tanner David Allen | Director | G · Gift | Direct | 2 | — | — | Form 4 |
| Aug 26, 2026 | Klar Stephen | Director | A · Grant/award | Direct | 113 | — | — | Form 4 |
WTM insider trading FAQ
Are insiders buying WTM stock?
Not on the open market. In the last 90 days, White Mountains Insurance Group Ltd insiders made no open-market purchases, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading WTM?
No insider bought or sold on the open market in the last 90 days.
Where does WTM insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.