White Mountains Insurance Group Ltd
WTM- Exchange
- NYSE
- Industry
- Fire, Marine & Casualty Insurance
- SEC CIK
- 0000776867
No open-market purchases or sales by White Mountains Insurance Group Ltd insiders were filed in the last 90 days; 356 institutions reported holding it in 13F filings for Q2 2026, worth $4.57B in total; Southeastern Asset Management (Longleaf) is the only superinvestor holding it.
Q4 2024 vs. Q3 2024
How the institutions holding White Mountains Insurance Group Ltd changed between Q3 2024 and Q4 2024.
All holders in Q4 2024All holders in Q3 2024
| Measure | Q3 2024 | Of which not filed for Q4 2024 | Q4 2024 | Change |
|---|---|---|---|---|
| Holders | 304 | 6 | 325 | +27 |
| Shares | 2.25M | 35.4K | 2.28M | +66.5K (+3.0%) |
| Value | $3.78B | $61.7M | $4.43B | +$713.4M (+19.2%) |
6 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so the changes leave them out.
New holders (41)
Institutions that held White Mountains Insurance Group Ltd at the end of Q4 2024 but not at the end of Q3 2024.
Sold out (14)
Institutions that held White Mountains Insurance Group Ltd at the end of Q3 2024 and filed for Q4 2024 without it.
| Institution | Shares, Q3 2024 | Value, Q3 2024 |
|---|---|---|
| Edgestream Partners, L.P. | 4,472 | $7.59M |
| Man Group plc | 1,367 | $2.32M |
| Prudential Financial Inc | 388 | $658.3K |
| Nebula Research & Development LLC | 284 | $481.7K |
| Centiva Capital, LP | 137 | $232.4K |
| Baldwin Brothers Inc | 100 | $169.6K |
| Centerpoint Advisors, LLC | 25 | $42.0K |
| Ashton Thomas Securities, LLC | 11 | $18.7K |
| Headlands Technologies LLC | 9 | $15.3K |
| NBC Securities, Inc. | 7 | $11.0K |
| Sachetta, LLC | 5 | $8.48K |
| SJS Investment Consulting Inc. | 2 | $3.39K |
| Frazier Financial Advisors, LLC | 2 | $3.39K |
| Reuter James Wealth Management, LLC | 2 | $3.39K |
Not filed for Q4 2024 yet (6)
Institutions that held White Mountains Insurance Group Ltd at the end of Q3 2024 and haven't filed a 13F for Q4 2024. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2024 | Value, Q3 2024 |
|---|---|---|
| Raymond James & Associates | 21,743 | $36.9M |
| Scout Investments, Inc. | 12,839 | $23.4M |
| Raymond James Financial Services Advisors, Inc. | 587 | $995.7K |
| New Potomac Partners, LLC | 130 | $220.5K |
| Raymond James Trust N.A. | 120 | $203.5K |
| Planning Capital Management Corp | 10 | $17.4K |