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WTMNYSE · Fire, Marine & Casualty Insurance

WHITE MOUNTAINS INSURANCE GROUP LTD

Alert me on WTM
0
Insider buys, 6 months
0
Congress trades, 6 months
0
Signals, 6 months

Six months

After each filing

4
Dec 22, 2025 Sale CAMPBELL REID TARLTON Insider
1 week
−0.2%S&P +0.3%
1 month
−1.3%S&P +0.6%
3 months
+5.9%S&P −3.8%
6 months
−3.0%S&P +7.8%
Dec 22, 2025 Sale Rountree George Manning Insider
1 week
−0.2%S&P +0.3%
1 month
−1.3%S&P +0.6%
3 months
+5.9%S&P −3.8%
6 months
−3.0%S&P +7.8%
Dec 17, 2025 Sale Gelston Philip A Insider
1 week
+2.0%S&P +3.1%
1 month
−0.1%S&P +1.2%
3 months
+5.3%S&P −2.8%
6 months
−1.7%S&P +11.8%
Jul 24, 2025 Buy Rep. James French Hill House
1 week
−0.8%S&P −2.4%
1 month
+2.1%S&P +0.8%
3 months
+8.3%S&P +5.7%
6 months
+16.1%S&P +9.4%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for WTM

36 held · newest 536 held · newest 2
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See all 36 filings for WTM

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal
No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters
No lobbying reports on file.