Mason Hawkins's WTM Position Overview
Mason Hawkins (via Southeastern Asset Management Inc/Tn/) currently holds 18,864 shares of White Mountains Insurance Group, Ltd. (WTM) worth $41.44 M, representing 2.04% of the portfolio. First purchased in 2021-Q4, this medium-term investment has been held for 18 quarters.
Based on 13F filings, Mason Hawkins has maintained a strategic position in WTM, demonstrating sustained confidence in this investment. Largest addition occurred in Q1 2022, adding 73,901 shares. Largest reduction occurred in Q4 2022, reducing 57,104 shares.
Analysis based on 13F filings available since 2013 Q2
Mason Hawkins's White Mountains Insurance Group (WTM) Holding Value Over Time
Track share changes against reported price movement
Quarterly White Mountains Insurance Group (WTM) Trades by Mason Hawkins
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | -12,788 | Reduce 40.40% | 18,864 | $2196.96 |
| Q3 2025 | +10,558 | Add 50.05% | 31,652 | $1671.52 |
| Q2 2025 | +2,610 | Add 14.12% | 21,094 | $1795.72 |
| Q1 2025 | -760 | Reduce 3.95% | 18,484 | $1925.81 |
| Q4 2024 | -1,494 | Reduce 7.20% | 19,244 | $1945.06 |
| Q3 2024 | -685 | Reduce 3.20% | 20,738 | $1.70 |
| Q2 2024 | -3,285 | Reduce 13.30% | 21,423 | $1817.45 |
| Q1 2024 | -7,738 | Reduce 23.85% | 24,708 | $1794.30 |
| Q4 2023 | -499 | Reduce 1.51% | 32,446 | $1505.01 |
| Q3 2023 | -9,272 | Reduce 21.96% | 32,945 | $1495.69 |
| Q2 2023 | -11,316 | Reduce 21.14% | 42,217 | $1388.91 |
| Q1 2023 | -1,960 | Reduce 3.53% | 53,533 | $1377.49 |
| Q4 2022 | -57,104 | Reduce 50.72% | 55,493 | $1414.33 |
| Q3 2022 | -13,006 | Reduce 10.35% | 112,597 | $1303.02 |
| Q2 2022 | +100 | Add 0.08% | 125,603 | $1246.13 |
| Q1 2022 | +73,901 | Add 143.21% | 125,503 | $1136.24 |
| Q4 2021 | +51,602 | New Buy | 51,602 | $1013.89 |
Mason Hawkins's White Mountains Insurance Group Investment FAQs
Mason Hawkins first purchased White Mountains Insurance Group, Ltd. (WTM) in Q4 2021, acquiring 51,602 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mason Hawkins has held White Mountains Insurance Group, Ltd. (WTM) for 18 quarters since Q4 2021.
Mason Hawkins's largest addition to White Mountains Insurance Group, Ltd. (WTM) was in Q1 2022, adding 125,503 shares worth $142.6 M.
According to the latest 13F filing for Q1 2026, Mason Hawkins's firm, Southeastern Asset Management Inc/Tn/, owns 18,864 shares of White Mountains Insurance Group, Ltd. (WTM), valued at approximately $41.44 M.
As of the Q1 2026 filing, White Mountains Insurance Group, Ltd. (WTM) represents approximately 2.04% of Mason Hawkins's publicly disclosed stock portfolio, making it one of their key holdings.
Mason Hawkins's peak holding in White Mountains Insurance Group, Ltd. (WTM) was 125,603 shares, as reported at the end of Q2 2022.