Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0000776867-26-000007
Filing Date
2026-01-02
Accepted
2026-01-02 18:04:43
Documents
1
Period of Report
2026-01-01

Document Format Files

Seq Description Document Type Size
1 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES form4.html 4  
1 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES form4.xml 4 5575
  Complete submission text file 0000776867-26-000007.txt   7345
Mailing Address 23 SOUTH MAIN STREET SUITE 3B HANOVER NH 03755
Business Address 23 SOUTH MAIN STREET SUITE 3B HANOVER NH 03755 603 640 2200
WHITE MOUNTAINS INSURANCE GROUP LTD (Issuer) CIK: 0000776867 (see all company filings)

EIN.: 942708455 | State of Incorp.: D0 | Fiscal Year End: 1231
SIC: 6331 Fire, Marine & Casualty Insurance
(CF Office: 02 Finance)

Mailing Address
Business Address
SEELIG ROBERT LAWRENCE (Reporting) CIK: 0001188198 (see all company filings)

State of Incorp.: D0 | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-08993 | Film No.: 26503356