WTM WHITE MOUNTAINS INSURANCE GROUP LTD: institutional ownership and insider trading
384 funds reported holding $5.12B of WHITE MOUNTAINS INSURANCE GROUP LTD in their latest 13F filings; in Q2 2026 funds net sold $8.43M, with 34 new positions and 45 funds selling out; over the last 12 months insiders bought $0 and sold $20.8M on the open market; over its last four quarters it reported revenue of $3.83B and net income of $1.12B.
WTM revenue and earnings
- Quarter ended Jun 30, 2026: revenue $845M, net income $200M, EPS 80.58
- Quarter ended Mar 31, 2026: revenue $518M, net income −$27.2M, EPS -12.59
- Quarter ended Dec 31, 2025: revenue $1.60B, net income $836M, EPS 325.02
- Quarter ended Sep 30, 2025: revenue $864M, net income $114M, EPS 44.18
Famous investors holding WTM
- Mason Hawkins (Southeastern Asset Management): $35.5M, 1.9% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $13.7M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $14.8M, 0.0% of the portfolio
- Izzy Englander (Millennium Management): $296K, 0.0% of the portfolio
Largest institutional holders of WTM
- VANGUARD GROUP INC — $490M
- DIMENSIONAL FUND ADVISORS LP — $330M
- Neuberger Berman Group LLC — $247M
- BlackRock, Inc. (BLK) — $244M
- River Road Asset Management, LLC — $240M
- VANGUARD PORTFOLIO MANAGEMENT LLC — $232M
- VANGUARD CAPITAL MANAGEMENT LLC — $223M
- FULLER & THALER ASSET MANAGEMENT, INC. — $211M
- COOKE & BIELER LP — $175M
- Wallace Capital Management Inc. — $166M
Recent WTM insider trades
- Dec 19, 2025: Campbell Reid Tarlton sold 5,000 shares ($10.3M)
- Dec 19, 2025: Rountree George Manning sold 5,000 shares ($10.3M)
- Dec 16, 2025: Gelston Philip A sold 165 shares ($338K)
Members of Congress trading WTM
- Jun 23, 2025: J. French Hill bought $50.0K–$100K
5%+ owners
- Vanguard Capital Management: 5.2% (Schedule 13G, filed Apr 30, 2026)
Who owns the most WTM stock?
The largest institutional holders of WHITE MOUNTAINS INSURANCE GROUP LTD in the latest 13F filings are VANGUARD GROUP INC ($490M), DIMENSIONAL FUND ADVISORS LP ($330M), Neuberger Berman Group LLC ($247M).
Are insiders buying or selling WTM?
Over the last 12 months insiders bought $0 and sold $20.8M of WHITE MOUNTAINS INSURANCE GROUP LTD stock on the open market (SEC Form 4).
Which famous investors own WTM?
Mason Hawkins, D. E. Shaw, Ken Griffin, Izzy Englander.
What was WTM's revenue last quarter?
WHITE MOUNTAINS INSURANCE GROUP LTD reported revenue of $845M for the quarter ended June 30, 2026, with net income of $200M.
Which ETFs hold WTM?
11 ETFs and mutual funds hold it among their top 100 positions, including VASVX, LLSCX, DFSV, VMNVX.