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 2021 vs. Q3 2021
How the institutions holding White Mountains Insurance Group Ltd changed between Q3 2021 and Q4 2021.
All holders in Q4 2021All holders in Q3 2021
| Measure | Q3 2021 | Of which not filed for Q4 2021 | Q4 2021 | Change |
|---|---|---|---|---|
| Holders | 232 | 3 | 243 | +14 |
| Shares | 2.67M | 1.01K | 2.68M | +5.38K (+0.2%) |
| Value | $2.86B | $579.0K | $2.71B | −$142.6M (−5.0%) |
3 institutions that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so the changes leave them out.
New holders (33)
Institutions that held White Mountains Insurance Group Ltd at the end of Q4 2021 but not at the end of Q3 2021.
Sold out (19)
Institutions that held White Mountains Insurance Group Ltd at the end of Q3 2021 and filed for Q4 2021 without it.
| Institution | Shares, Q3 2021 | Value, Q3 2021 |
|---|---|---|
| Winton Group Ltd | 3,415 | $3.65M |
| CIBC Asset Management Inc | 2,310 | $2.47M |
| Franklin Resources Inc | 2,270 | $2.43M |
| Jane Street Group, LLC | 1,067 | $1.14M |
| Kovitz Investment Group Partners, LLC | 900 | $963.0K |
| Alphasimplex Group, LLC | 402 | $430.0K |
| Financial Engines Advisors L.L.C. | 372 | $397.0K |
| HighTower Advisors, LLC | 350 | $370.0K |
| Pictet Asset Management SA | 240 | $257.0K |
| Gyon Technologies Capital Management, LP | 236 | $252.0K |
| Principal Financial Group Inc | 232 | $248.0K |
| One Wealth Advisors, LLC | 212 | $227.0K |
| Panagora Asset Management Inc | 196 | $210.0K |
| Glenview Trust Co | 193 | $207.0K |
| Regions Financial Corp | 189 | $202.0K |
| Essex Investment Management Co LLC | 70 | $75.0K |
| Cahill Financial Advisors Inc | 20 | $21.0K |
| Loomis Sayles & Co L P | 9 | $10.0K |
| Meridian Wealth Partners, LLC | 2 | $2.00K |
Not filed for Q4 2021 yet (3)
Institutions that held White Mountains Insurance Group Ltd at the end of Q3 2021 and haven't filed a 13F for Q4 2021. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2021 | Value, Q3 2021 |
|---|---|---|
| Marshall Wace North America L.P. | 326 | $349.0K |
| First Mercantile Trust Co | 181 | $194.0K |
| Green Harvest Asset Management LLC | 500 | $36.0K |