WHITE MOUNTAINS INSURANCE GROUP LTD — SC TO-I/A Filings
25 SC TO-I/A filings on record
This page lists all SC TO-I/A filings submitted to the SEC by WHITE MOUNTAINS INSURANCE GROUP LTD (WTM), sorted by most recent first. Each row links to the full filing on EdgarLookup. WHITE MOUNTAINS INSURANCE GROUP LTD has filed 25 SC TO-I/A documents with the SEC since 2009. To view all SEC filings by WHITE MOUNTAINS INSURANCE GROUP LTD, see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
13F-HR
13F-NT
3
3/A
4
4/A
424B3
5
8-A12B
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
DEFM14A
DEFR14A
N-PX
NT 11-K
PRE 14A
S-3
S-3/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13E4
SC 13E4/A
SC 13G
SC 13G/A
SC TO-C
SC TO-I
SC TO-I/A
SC TO-T
SC TO-T/A
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC TO-I/A | SC TO-I/A | 0001104659-25-124380 | Dec 29, 2025 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-25-123514 | Dec 22, 2025 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-22-102831 | Sep 26, 2022 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-22-101757 | Sep 21, 2022 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-22-095834 | Aug 30, 2022 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-18-032375 | May 11, 2018 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-18-031101 | May 8, 2018 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-18-029580 | May 2, 2018 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-17-057915 | Sep 19, 2017 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-17-057319 | Sep 15, 2017 | — |
| SC TO-I/A | SC TO-I/A | 0001104659-17-053543 | Aug 25, 2017 | — |
| SC TO-I/A | AMENDMENT NO. 4 | 0000950157-12-000149 | Mar 28, 2012 | — |
| SC TO-I/A | AMENDMENT NO. 3 | 0000950157-12-000127 | Mar 23, 2012 | — |
| SC TO-I/A | AMENDMENT NO. 2 | 0000950157-12-000100 | Mar 8, 2012 | — |
| SC TO-I/A | AMENDMENT NO. 1 | 0000950157-12-000081 | Feb 29, 2012 | — |
| SC TO-I/A | AMENDMENT NO. 3 | 0000950157-11-000906 | Nov 18, 2011 | — |
| SC TO-I/A | AMENDMENT NO. 2 | 0000950157-11-000901 | Nov 15, 2011 | — |
| SC TO-I/A | SC TO-I/A | 0001047469-11-008575 | Oct 19, 2011 | — |
| SC TO-I/A | AMENDMENT NO. 4 | 0000950157-11-000750 | Sep 21, 2011 | — |
| SC TO-I/A | AMENDMENT NO. 3 | 0000950157-11-000733 | Sep 16, 2011 | — |
| SC TO-I/A | SC TO-I/A | 0001047469-11-007699 | Aug 26, 2011 | — |
| SC TO-I/A | SC TO-I/A | 0001047469-11-007587 | Aug 23, 2011 | — |
| SC TO-I/A | SCHEDULE TO-I/A | 0000912057-00-042414 | Sep 25, 2000 | — |
| SC TO-I/A | SCHEDULE TO-I/A | 0000912057-00-041729 | Sep 18, 2000 | — |
| SC TO-I/A | SC TO-I/A | 0000912057-00-040933 | Sep 12, 2000 | — |