13F Filings History of WHITE MOUNTAINS INSURANCE GROUP LTD

Latest 13F report
Q4 2025 - 12 Feb 2026
Value $
$261,929,551
Signature - Title
Michaela J. Hildreth - Managing Director and Chief Accounting Officer
Location
Hanover, NH
Summary
This page shows a list of all the recent 13F filings made by WHITE MOUNTAINS INSURANCE GROUP LTD. Form 13F is required to be filed within 45 days of the end of a calendar quarter. WHITE MOUNTAINS INSURANCE GROUP LTD reported 2 stock holdings with total value $261,929,551 as of Q4 2025.

Notify me when WHITE MOUNTAINS INSURANCE GROUP LTD files a new 13F portfolio report.

⭐ Subscribe ⭐
Holdings Value
Quarter Holdings Value $ Bought Sold Net Top Holdings Form Type Filing Time
Q4 2025 2 $261,929,551 +$30,686,400 $0 +$30,686,400 MAX, SPY 13F-HR 12 Feb 2026, 17:26
Q3 2025 1 $203,208,267 $0 $0 $0 MAX 13F-HR 13 Nov 2025, 08:28
Q2 2025 1 $195,529,923 $0 -$120,938,440 -$120,938,440 MAX 13F-HR 11 Aug 2025, 16:19
Q1 2025 2 $285,933,553 $0 -$93,389,601 -$93,389,601 MAX, SPY 13F-HR 12 May 2025, 16:13
Q4 2024 2 $426,155,380 $0 $0 $0 SPY, MAX 13F-HR 12 Feb 2025, 16:23
Q3 2024 2 $543,217,129 $0 $0 $0 MAX, SPY 13F-HR 12 Nov 2024, 16:18
Q2 2024 2 $443,687,322 +$50,775,726 -$65,852,634 -$15,076,908 MAX, SPY 13F-HR 08 Aug 2024, 16:05
Q1 2024 2 $617,203,048 $0 $0 $0 MAX, SPY 13F-HR 09 May 2024, 16:39
Q4 2023 2 $392,620,178 $0 -$142,593,000 -$142,593,000 MAX, SPY 13F-HR 13 Feb 2024, 16:22
Q3 2023 2 $440,944,652 $0 -$10,687,000 -$10,687,000 SPY, MAX 13F-HR 09 Nov 2023, 07:15
Q2 2023 2 $508,202,687 +$61,002,373 -$114,410,568 -$53,408,195 SPY, MAX 13F-HR 10 Aug 2023, 08:18
Q1 2023 2 $611,136,533 $0 $0 $0 SPY, MAX 13F-HR 11 May 2023, 07:35
Q4 2022 2 $502,393,719 +$284,124,839 $0 +$284,124,839 SPY, MAX 13F-HR 13 Feb 2023, 16:12
Q3 2022 2 $194,658,000 +$46,433,000 $0 +$46,433,000 MAX, SPY 13F-HR 09 Nov 2022, 16:10
Q2 2022 1 $166,859,000 $0 $0 $0 MAX 13F-HR 12 Aug 2022, 08:33
Q1 2022 1 $280,357,000 $0 $0 $0 MAX 13F-HR 12 May 2022, 16:05
Q4 2021 1 $261,554,000 $0 $0 $0 MAX 13F-HR 11 Feb 2022, 16:06
Q3 2021 1 $316,439,000 $0 $0 $0 MAX 13F-HR 12 Nov 2021, 08:19
Q2 2021 1 $713,174,000 $0 $0 $0 MAX 13F-HR 12 Aug 2021, 16:09
Q1 2021 1 $600,184,000 $0 -$127,271,760 -$127,271,760 MAX 13F-HR 14 May 2021, 08:45
Q4 2020 1 $802,193,000 $0 $0 $0 MAX 13F-HR 12 Feb 2021, 16:12
Q3 2020 0 $0 13F-NT 12 Nov 2020, 15:42
Q2 2020 0 $0 13F-NT 12 Aug 2020, 16:03
Q1 2020 0 $0 13F-NT 12 May 2020, 16:06
Q4 2019 0 $0 13F-NT 12 Feb 2020, 15:06
Q3 2019 0 $0 13F-NT 12 Nov 2019, 15:18
Q2 2019 0 $0 13F-NT 08 Aug 2019, 17:09
Q1 2019 0 $0 13F-NT 13 May 2019, 16:12
Q4 2018 0 $0 13F-NT 13 Feb 2019, 15:06
Q3 2018 0 $0 13F-NT 07 Nov 2018, 15:08
Q2 2018 0 $0 13F-NT 08 Aug 2018, 16:08
Q1 2018 0 $0 13F-NT 10 May 2018, 16:39
Q4 2017 0 $0 13F-NT 13 Feb 2018, 15:13
Q3 2017 0 $0 13F-NT 09 Nov 2017, 15:12
Q2 2017 0 $0 13F-NT 10 Aug 2017, 16:10
Q1 2017 0 $0 13F-NT 11 May 2017, 16:27
Q4 2016 0 $0 13F-NT 13 Feb 2017, 15:48
Q3 2016 0 $0 13F-NT 10 Nov 2016, 14:47
Q2 2016 0 $0 13F-NT 11 Aug 2016, 08:02
Q1 2016 0 $0 13F-NT 12 May 2016, 16:01
Q4 2015 1 $653,267,000 $0 $0 $0 SYA 13F-HR 16 Feb 2016, 08:16
Q3 2015 1 $650,594,000 $0 $0 $0 SYA 13F-HR 12 Nov 2015, 17:12
Q2 2015 1 $496,993,000 +$12,411,302 $0 +$12,411,302 SYA 13F-HR 12 Aug 2015, 08:12
Q1 2015 1 $470,347,000 $0 $0 $0 SYA 13F-HR 14 May 2015, 08:08
Q4 2014 1 $462,127,000 $0 $0 $0 SYA 13F-HR 17 Feb 2015, 09:02
Q3 2014 1 $467,740,000 $0 $0 $0 SYA 13F-HR 13 Nov 2014, 16:12
Q2 2014 1 $455,912,000 $0 -$525,000 -$525,000 SYA 13F-HR 08 Aug 2014, 07:59
Q1 2014 2 $397,894,000 $0 $0 $0 SYA, SIEGY 13F-HR 12 May 2014, 16:19
Q4 2013 2 $380,659,000 $0 $0 $0 SYA, SIEGY 13F-HR 13 Feb 2014, 16:06