ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in WTM — White Mountains Insurance Group Ltd
CIK 1164508
BOSTON, MA
Position in WTM
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$4,202,784
+$2,517,502 QoQ
Shares Held
1,913
+135.9% QoQ
Ownership
0.080%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2020
4 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in WTM Over Time
Shares Held
Position Value (USD)
Position in Insurance - Property & Casualty
Financial Services · as of Mar 31, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $2,022,240,598 across 33 Insurance - Property & Casualty names. WTM ranks #26 (0.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PGR |
Progressive Corp/Oh/
|
2,663,827 | $528,077,064 | |
| 2 | CB |
Chubb Ltd
|
1,305,422 | $425,476,192 | |
| 3 | TRV |
Travelers Companies, Inc.
|
821,884 | $239,727,125 | |
| 4 | ALL |
Allstate Corp
|
764,096 | $158,427,664 | |
| 5 | CINF |
Cincinnati Financial Corp
|
903,028 | $142,091,455 | |
| 6 | AFG |
American Financial Group Inc
|
431,144 | $55,061,400 | |
| 7 | WRB |
Berkley W R Corp
|
803,150 | $53,232,782 | |
| 8 | MCY |
Mercury General Corp
|
574,897 | $50,677,170 |
All Filings in WTM
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $4,202,784 | 1,913 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $1,685,282 | 811 | Shares | Defined | 2026-02-13 | |
| 2021-03-31 | $780,430 | 700 | Shares | Defined | 2021-05-14 | |
| 2020-09-30 | $233,700 | 300 | Shares | Defined | 2020-11-12 | |
| No filing history on record for this holder in this stock. | ||||||