11 institutions reported holding $97.3M of WHITE MTNS INS GROUP LTD (WTM) in SEC 13F filings for 2026-06-30. Largest institutional holders: REINHART PARTNERS, LLC. ($92.3M), BRAVE ASSET MANAGEMENT INC ($1.9M), Avior Wealth Management, LLC ($1.3M), Lexington Hill Partners, LLC ($1.1M), GAMMA Investing LLC ($516,274). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | REINHART PARTNERS, LLC. | $92.3M | 44,480 | Added |
| 2 | BRAVE ASSET MANAGEMENT INC | $1.9M | 924 | Hold |
| 3 | Avior Wealth Management, LLC | $1.3M | 619 | Added |
| 4 | Lexington Hill Partners, LLC | $1.1M | 520 | Hold |
| 5 | GAMMA Investing LLC | $516,274 | 249 | Added |
| 6 | EASTERN BANK | $207,339 | 100 | Hold |
| 7 | Versant Capital Management, Inc | $49,761 | 24 | Trimmed |
| 8 | Miller Global Investments, LLC | $24,881 | 12 | Hold |
| 9 | ELEVATION WEALTH PARTNERS, LLC | $2,074 | 1 | Hold |
| 10 | MassMutual Private Wealth & Trust, FSB | $2,073 | 1 | New |
| 11 | CX Institutional | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30