WHITE MTNS INS GROUP LTD (G9618E107) Institutional Ownership Changes & 13F Activity
WHITE MTNS INS GROUP LTD (G9618E107) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Longleaf Partners, Renaissance Technologies LLC, Sequoia Financial Advisors, Dodge & Cox Stock Fund, and Third Avenue Management.
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2018 | Third Avenue Management | Buy | 347 | 34,195 | $28,127 |
| Q4 2017 | Renaissance Technologies LLC | Sell | -21,100 | 12,200 | $10,386 |
| Q4 2017 | Third Avenue Management | Buy | 1,247 | 33,848 | $28,815 |
| Q3 2017 | Renaissance Technologies LLC | Sell | -8,000 | 33,300 | $28,538 |
| Q3 2017 | Third Avenue Management | Sell | -434 | 32,601 | $27,940 |
| Q2 2017 | Third Avenue Management | Sell | -31,351 | 33,035 | $28,696 |
| Q2 2017 | Renaissance Technologies LLC | Buy | 10,600 | 41,300 | $35,874 |
| Q1 2017 | Renaissance Technologies LLC | Buy | 13,100 | 30,700 | $27,012 |
| Q1 2017 | Third Avenue Management | Buy | 295 | 64,386 | $56,652 |
| Q4 2016 | Renaissance Technologies LLC | Buy | 4,800 | 17,600 | $14,714 |
| Q4 2016 | Third Avenue Management | Sell | -2,010 | 64,091 | $53,583 |
| Q3 2016 | Renaissance Technologies LLC | Sell | -7,000 | 12,800 | $10,624 |
| Q3 2016 | Third Avenue Management | Sell | -2,289 | 66,101 | $54,864 |
| Q2 2016 | Renaissance Technologies LLC | Sell | -17,300 | 19,800 | $16,672 |
| Q2 2016 | Third Avenue Management | Sell | -3,969 | 68,390 | $57,584 |
| Q1 2016 | Third Avenue Management | Sell | -16,928 | 72,359 | $58,075 |
| Q1 2016 | Renaissance Technologies LLC | Sell | -1,100 | 37,100 | $29,776 |
| Q4 2015 | Third Avenue Management | Sell | -20,619 | 89,287 | $64,895 |
| Q4 2015 | Renaissance Technologies LLC | Buy | 600 | 38,200 | $27,764 |
| Q3 2015 | Third Avenue Management | Sell | -20,961 | 109,906 | $82,133 |
| Q3 2015 | Renaissance Technologies LLC | Buy | 3,900 | 37,600 | $28,098 |
| Q2 2015 | Third Avenue Management | Sell | -19,103 | 130,867 | $85,710 |
| Q2 2015 | Renaissance Technologies LLC | Buy | 2,500 | 33,700 | $22,071 |
| Q1 2015 | Third Avenue Management | Sell | -4,488 | 149,970 | $102,658 |
| Q1 2015 | Renaissance Technologies LLC | Buy | 2,300 | 31,200 | $21,357 |
| Q4 2014 | Third Avenue Management | Sell | -27,556 | 154,458 | $97,326 |
| Q4 2014 | Renaissance Technologies LLC | Buy | 6,000 | 28,900 | $18,210 |
| Q3 2014 | Third Avenue Management | Sell | -9,633 | 182,014 | $114,681 |
| Q3 2014 | Bares Capital Management | Buy | 577 | 2,503 | $1,577 |
| Q3 2014 | Renaissance Technologies LLC | Buy | 407 | 22,900 | $14,429 |
Frequently asked questions about G9618E107 activity
Which institutional owners are buying G9618E107?
Institutional owners buying G9618E107 include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in G9618E107 activity?
"Buy" means an investor increased their reported position in G9618E107 compared to the prior reporting period. This reflects growing exposure to WHITE MTNS INS GROUP LTD (G9618E107) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in G9618E107 increasing?
Institutional interest in G9618E107 can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.