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White Mountains Insurance Group Ltd SEC Filings
What White Mountains Insurance Group Ltd has told the SEC happened, by the 8-K items and forms it filed under: when it reported results, who joined or left, what it bought or sold, and whether its auditor or its accounts ever changed.
WTM overview →Filings on file
131
since Nov 2, 2016
Warning signs
0
none filed
Last results
Aug 6, 2026
8-K item 2.02
Industry
Fire, Marine & Casualty Insurance
SIC 6331
Newest first
Each label is a form type or an 8-K item as filed; each row links to the filing.
| Filed | What it reports | Document |
|---|---|---|
| Aug 27, 2026 | Executive or director change 8-K | Read ↗ |
| May 21, 2026 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Sep 2, 2025 | Executive or director change 8-K | Read ↗ |
| Apr 10, 2024 | Executive or director change 8-K | Read ↗ |
| Feb 23, 2024 | Executive or director change 8-K | Read ↗ |
| May 25, 2023 | Executive or director change 8-K | Read ↗ |
| Feb 23, 2023 | Executive or director change 8-K | Read ↗ |
| Dec 2, 2021 | Executive or director change 8-K | Read ↗ |
| Oct 12, 2021 | Executive or director change 8-K | Read ↗ |
| May 28, 2021 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Dec 21, 2020 | Executive or director change 8-K/A | Read ↗ |
| Dec 10, 2020 | Executive or director change 8-K | Read ↗ |
| Dec 1, 2020 | Executive or director change 8-K | Read ↗ |
| May 22, 2020 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Aug 30, 2019 | Executive or director change 8-K | Read ↗ |
| Mar 1, 2019 | Executive or director change 8-K | Read ↗ |
| Jan 7, 2019 | Executive or director change 8-K | Read ↗ |
| Aug 24, 2018 | Executive or director change 8-K | Read ↗ |
| May 29, 2018 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Mar 2, 2018 | Executive or director change 8-K | Read ↗ |
| Sep 28, 2017 | Executive or director changeAcquisition or sale completedMaterial agreement 8-K | Read ↗ |
| Aug 25, 2017 | Executive or director change 8-K | Read ↗ |
| May 2, 2017 | Executive or director change 8-K | Read ↗ |
| Mar 6, 2017 | Executive or director change 8-K | Read ↗ |
Source: White Mountains Insurance Group Ltd's EDGAR filing history, the last ten years. The labels are the form types and 8-K item numbers the company filed under, not a reading of what it wrote — an item 5.02 can be a chief executive fired or a director retiring on schedule — so each row links to the filing.
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