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.
Q2 2021 vs. Q1 2021
How the institutions holding White Mountains Insurance Group Ltd changed between Q1 2021 and Q2 2021.
All holders in Q2 2021All holders in Q1 2021
| Measure | Q1 2021 | Of which not filed for Q2 2021 | Q2 2021 | Change |
|---|---|---|---|---|
| Holders | 245 | 1 | 233 | −11 |
| Shares | 2.71M | 255 | 2.71M | +4.07K (+0.2%) |
| Value | $3.02B | $284.0K | $3.11B | +$89.6M (+3.0%) |
1 institution that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so the changes leave them out.
New holders (17)
Institutions that held White Mountains Insurance Group Ltd at the end of Q2 2021 but not at the end of Q1 2021.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| Brandywine Global Investment Management, LLC | 6,282 | $7.21M | 0.05% |
| State of New Jersey Common Pension Fund D | 2,093 | $2.40M | 0.01% |
| Kovitz Investment Group Partners, LLC | 900 | $1.03M | 0.02% |
| Schonfeld Strategic Advisors LLC | 700 | $804.0K | 0.01% |
| Handelsbanken Fonder AB | 593 | $681.0K | 0.00% |
| Gyon Technologies Capital Management, LP | 305 | $350.0K | 0.11% |
| Jane Street Group, LLC | 213 | $245.0K | 0.00% |
| One Wealth Advisors, LLC | 212 | $243.0K | 0.08% |
| Security National Bank of So Dak | 200 | $230.0K | 0.18% |
| Summit Global Investments | 200 | $230.0K | 0.01% |
| Ergoteles LLC | 192 | $220.0K | 0.01% |
| Prudential Financial Inc | 184 | $212.0K | 0.00% |
| Sageworth Trust Co | 178 | $204.0K | 0.02% |
| SRS Capital Advisors, Inc. | 99 | $114.0K | 0.02% |
| Anchor Investment Management, LLC | 50 | $57.4K | 0.01% |
| NEXT Financial Group, Inc | 26 | $30.0K | 0.00% |
| Advisory Services Network, LLC | 16 | $18.0K | 0.00% |
Sold out (28)
Institutions that held White Mountains Insurance Group Ltd at the end of Q1 2021 and filed for Q2 2021 without it.
Not filed for Q2 2021 yet (1)
Institutions that held White Mountains Insurance Group Ltd at the end of Q1 2021 and haven't filed a 13F for Q2 2021. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q1 2021 | Value, Q1 2021 |
|---|---|---|
| Bokf, NA | 255 | $284.0K |