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White Mountains (WTM)
NYSE
$2,110.22-$0.73 (-0.03%)
Price as of Aug 21, 2026 7:30 PM EDT- $6.7BMarket Cap
- 13.35%1-Year Change
- Insurance - Property & CasualtyIndustry
White Mountains (WTM)
$2,110.22-$0.73 (-0.03%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD GROUP INC | 9.52% | 235,698 | -11,306 (-4.80%) | Dec 31, 2025 |
WELLINGTON MANAGEMENT CO LLP | 8.95% | 221,559 | -2,301 (-1.04%) | Dec 31, 2021 |
DIMENSIONAL FUND ADVISORS LP | 6.42% | 158,954 | +2,336 (+1.47%) | Jun 30, 2026 |
ATLANTA CAPITAL MANAGEMENT CO L L C | 5.15% | 127,468 | -7,721 (-6.06%) | Sep 30, 2022 |
BLACKROCK INSTITUTIONAL TRUST COMPANY, N.A. | 4.89% | 121,061 | -9,940 (-8.21%) | Dec 31, 2016 |
NEUBERGER BERMAN GROUP LLC | 4.81% | 119,141 | -5,574 (-4.68%) | Jun 30, 2026 |
BLACKROCK FUNDING, INC. /DE | 4.78% | 118,484 | +3,361 (+2.84%) | Dec 31, 2024 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
BNY MELLON FUNDS TRUST | 40.38% | 1.0M | 0 (0.00%) | May 31, 2026 |
VANGUARD INDEX FUNDS | 7.90% | 195,732 | +8,391 (+4.29%) | Mar 31, 2026 |
VANGUARD WHITEHALL FUNDS | 2.04% | 50,550 | -1,100 (-2.18%) | Apr 30, 2026 |
Dimensional ETF Trust | 1.87% | 46,318 | +636 (+1.37%) | Apr 30, 2026 |
CARILLON SERIES TRUST | 1.37% | 33,937 | 0 (0.00%) | Mar 31, 2026 |
AMERICAN CENTURY ETF TRUST | 1.15% | 28,383 | +27,324 (+96.27%) | May 31, 2026 |
RBB FUND, INC. | 0.67% | 16,628 | 0 (0.00%) | May 31, 2026 |
Current Ownership Distribution
- Institutions45.1M (54.09%)
- Insiders23.9M (28.71%)
- Mutual Funds14.3M (17.19%)
- Other0 (0.00%)
Insider Transactions
- 28.71% (23.9M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 2Number of InsiderSelling (last 12 months)
- $20.9MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Tanner David Allen | Gift | Mar 04, 2026 | $0.00 | 225 | $0.00 | 1,879 |
SEELIG ROBERT LAWRENCE EVP & General Counsel | Award | Feb 25, 2026 | $0.00 | 775 | $0.00 | 2,500 |
Hildreth Michaela MD & Chief Accounting Officer | Award | Feb 25, 2026 | $0.00 | 600 | $0.00 | 1,825 |
Caffrey Liam P Chief Executive Officer | Award | Feb 25, 2026 | $0.00 | 1,500 | $0.00 | 3,650 |
Papamichael Michael A Chief Financial Officer | Award | Feb 25, 2026 | $0.00 | 500 | $0.00 | 1,200 |
Caffrey Liam P Chief Executive Officer | In Kind | Jan 01, 2026 | $883,162.75 | 425 | $2,078.03 | 1,655 |
Papamichael Michael A Chief Financial Officer | In Kind | Jan 01, 2026 | $272,221.93 | 131 | $2,078.03 | 772 |
SEELIG ROBERT LAWRENCE EVP & General Counsel | In Kind | Jan 01, 2026 | $827,055.94 | 398 | $2,078.03 | 17,907 |
Rountree George Manning Chief Executive Officer | Sell | Dec 19, 2025 | $10.3M | 5,000 | $2,050.00 | 13,809 |
Gelston Philip A | Sell | Dec 16, 2025 | $338,004.15 | 165 | $2,048.51 | 1,568 |
CAMPBELL REID TARLTON | Gift | Nov 25, 2025 | $0.00 | 50 | $0.00 | 15,440 |
Tanner David Allen | Gift | Nov 10, 2025 | $0.00 | 4 | $0.00 | 2,104 |
Dillon Margaret | Award | May 22, 2025 | $0.00 | 150 | $0.00 | 945 |
Carlson Peter M | Award | May 22, 2025 | $0.00 | 150 | $0.00 | 717 |
CHOKSI MARY C | Award | May 22, 2025 | $0.00 | 150 | $0.00 | 1,858 |
CAMPBELL REID TARLTON | Award | May 22, 2025 | $0.00 | 150 | $0.00 | 15,490 |
Hicks Weston M | Award | May 22, 2025 | $0.00 | 210 | $0.00 | 2,746 |
Gelston Philip A | Award | May 22, 2025 | $0.00 | 150 | $0.00 | 1,733 |
Tanner David Allen | Award | May 22, 2025 | $0.00 | 150 | $0.00 | 2,108 |
Caffrey Liam P EVP& Chief Financial Officer | Award | Feb 26, 2025 | $0.00 | 1,025 | $0.00 | 3,400 |
Hildreth Michaela MD & Chief Accounting Officer | Award | Feb 26, 2025 | $0.00 | 625 | $0.00 | 1,825 |
Harrison Giles E EVP & Chief Strategy Officer | Award | Feb 26, 2025 | $0.00 | 900 | $0.00 | 1,900 |
Rountree George Manning Chief Executive Officer | Award | Feb 26, 2025 | $0.00 | 1,625 | $0.00 | 5,425 |
SEELIG ROBERT LAWRENCE EVP & General Counsel | Award | Feb 26, 2025 | $0.00 | 825 | $0.00 | 2,725 |
SEELIG ROBERT LAWRENCE EVP & General Counsel | In Kind | Jan 01, 2025 | $964,749.76 | 496 | $1,945.06 | 17,305 |
Hildreth Michaela MD & Chief Accounting Officer | In Kind | Jan 01, 2025 | $628,254.38 | 323 | $1,945.06 | 2,225 |
Rountree George Manning Chief Executive Officer | In Kind | Jan 01, 2025 | $2.1M | 1,067 | $1,945.06 | 18,809 |
Caffrey Liam P President & CFO | In Kind | Jan 01, 2025 | $816,925.20 | 420 | $1,945.06 | 830 |
Hildreth Michaela MD & Chief Accounting Officer | Gift | Nov 29, 2024 | $0.00 | 75 | $0.00 | 1,798 |