WHITE MTNS INS GROUP LTD (G9618E107) Institutional Ownership
G9618E107 is currently held by 3 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $48.99M based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026.
The largest disclosed holder is Longleaf Partners, which reported ownership valued at approximately $41.44M in its March 31, 2026 13F filing.
Major shareholders tracked on this page include Longleaf Partners, Renaissance Technologies LLC, Sequoia Financial Advisors, and other prominent asset managers. Collectively, these investors account for approximately 100% of the total disclosed value among the investors covered in this analysis.
This page tracks 13F-reported ownership trends, hedge fund exposure, portfolio concentration, historical 13F filings, and estimated holding performance to help investors analyze smart money sentiment toward WHITE MTNS INS GROUP LTD (G9618E107).
Institutional Ownership Trend
| Portfolio quarter | Institutional holders | Total reported value | Total shares |
|---|---|---|---|
| Q1 2026 | 3 | $48,989,227 | 22,299 |
| Q4 2025 | 3 | $70,774,617 | 34,059 |
| Q3 2025 | 3 | $57,367,526 | 34,321 |
| Q2 2025 | 2 | $39,368,703 | 21,924 |
| Q1 2025 | 3 | $38,342,166 | 19,910 |
| Q4 2024 | 3 | $40,382,155 | 20,761 |
| Q3 2024 | 3 | $4,758,064 | 23,522 |
| Q2 2024 | 3 | $42,924,534 | 23,618 |
| Q1 2024 | 3 | $44,687,759 | 27,303 |
| Q4 2023 | 3 | $49,626,352 | 36,071 |
| Q3 2023 | 3 | $49,573,599 | 36,441 |
| Q2 2023 | 3 | $58,911,729 | 45,213 |
Related G9618E107 Institutional Insights:
- G9618E107 Institutional Ownership & Insiders Activity
- G9618E107 Institutional Ownership & 13F Activity
- G9618E107 Top Institutional Shareholders
- G9618E107 Institutional Buying Activity
- G9618E107 Institutional Selling Activity
- Institutional Portfolio Overlap & Shared Holdings
- G9618E107 Insider Trading & SEC Form 4 Activity
- Top Institutional Investor Stock Rankings