WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)
$2094.62-$40.79 (-1.91%) Today
White Mountains Insurance Group Ltd is engaged in the business of making opportunistic and value-oriented acquisitions of businesses and assets in the insurance, financial services, and related sectors, operating these businesses and assets through its subsidiaries and, if and when attractive exit valuations become available, disposing of these businesses and assets. The company conducts its business in five areas: property and casualty insurance and reinsurance, municipal bond reinsurance, capital solutions for asset and wealth management firms, property and casualty insurance distribution, and other operations. The company has four reportable segments: Ark/WM Outrigger, HG Global, Kudu and Distinguished.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Grant or award | 1 | 113 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
30 Form 4 filings on record, the earliest from Dec 2, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Stephen Klar - Director | Grant or award | Common Shares | 113 | $0.00 | - | |
| David Allen Tanner - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| Suzanne F. Shank - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| Weston M. Hicks - Director | Grant or award | Common Shares | 190 | $0.00 | - | |
| Philip A. Gelston - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| Margaret Dillon - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| John Chu - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| Mary C. Choksi - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| Peter M. Carlson - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
| Reid Tarlton Campbell - Director | Grant or award | Common Shares | 135 | $0.00 | - | |
 Robert Lawrence Seelig - Officer | Gift | Common Shares | 50 | $0.00 | - | |
| David Allen Tanner - Director | Gift | Common Shares | 225 | $0.00 | - | |
 Liam P. Caffrey - Officer | Grant or award | Common Shares (Restricted) | 1,500 | $0.00 | - | |
| Giles E. Harrison - Officer | Grant or award | Common Shares (restricted) | 775 | $0.00 | - | |
| Michaela Hildreth - Officer | Grant or award | Common Shares (Restricted) | 600 | $0.00 | - | |
 Michael A. Papamichael - Officer | Grant or award | Common Shares (Restricted) | 500 | $0.00 | - | |
| Robert Lawrence Seelig - Officer | Grant or award | Common Shares (restricted) | 775 | $0.00 | - | |
| Michaela Hildreth - Officer | Tax withholding / forfeiture | Common Shares | 274 | $2,078.03 | $569K | |
| Michael A. Papamichael - Officer | Tax withholding / forfeiture | Common Shares | 131 | $2,078.03 | $272K | |
| Robert Lawrence Seelig - Officer | Tax withholding / forfeiture | Common Shares | 398 | $2,078.03 | $827K | |
| Liam P. Caffrey - Officer | Tax withholding / forfeiture | Common Shares | 425 | $2,078.03 | $883K | |
| Michaela Hildreth - Officer | Gift | Common Shares | 60 | $0.00 | - | |
| Reid Tarlton Campbell - Director | Open-market sale | Common Shares | 5,000 | $0.00 | - | |
| George Manning Rountree - Officer | Open-market sale | Common Shares | 5,000 | $2,050.00 | $10.25M | |
| Philip A. Gelston - Director | Open-market sale | Common Shares | 165 | $2,048.51 | $338K | |
| Reid Tarlton Campbell - Director | Gift | Common Shares | 50 | $0.00 | - | |
| David Allen Tanner - Director | Gift | Common Shares | 4 | $0.00 | - | |
| Mary C. Choksi - Director | Grant or award | Common Shares | 150 | $0.00 | - | |
| Weston M. Hicks - Director | Grant or award | Common Shares | 210 | $0.00 | - | |
| Michaela Hildreth - Officer | Gift | Common Shares | 75 | $0.00 | - |
WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) had 1 insider filing in the last 90 days, with the most recent on 2026-08-27. The full record for WTM runs to 30 Form 4 filings, the earliest from 2024-12-02. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of WTM were filed in the last 90 days.
No insider sales of WTM were filed in the last 90 days. 3 sales are on record for this company.
This page tracks WTM Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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