WHITE MTNS INS GROUP LTD (G9618E107) Stock Institutional Trading Activity


WHITE MTNS INS GROUP LTD (G9618E107) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Longleaf Partners, Sequoia Financial Advisors, Dodge & Cox Stock Fund, and Third Avenue Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

Explore more:

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2017Renaissance Technologies LLCSell-8,00033,300$28,538
Q2 2017Third Avenue ManagementSell-31,35133,035$28,696
Q2 2017Renaissance Technologies LLCBuy10,60041,300$35,874
Q1 2017Third Avenue ManagementBuy29564,386$56,652
Q1 2017Renaissance Technologies LLCBuy13,10030,700$27,012
Q4 2016Third Avenue ManagementSell-2,01064,091$53,583
Q4 2016Renaissance Technologies LLCBuy4,80017,600$14,714
Q3 2016Third Avenue ManagementSell-2,28966,101$54,864
Q3 2016Renaissance Technologies LLCSell-7,00012,800$10,624
Q2 2016Third Avenue ManagementSell-3,96968,390$57,584
Q2 2016Renaissance Technologies LLCSell-17,30019,800$16,672
Q1 2016Third Avenue ManagementSell-16,92872,359$58,075
Q1 2016Renaissance Technologies LLCSell-1,10037,100$29,776
Q4 2015Third Avenue ManagementSell-20,61989,287$64,895
Q4 2015Renaissance Technologies LLCBuy60038,200$27,764
Q3 2015Third Avenue ManagementSell-20,961109,906$82,133
Q3 2015Renaissance Technologies LLCBuy3,90037,600$28,098
Q2 2015Third Avenue ManagementSell-19,103130,867$85,710
Q2 2015Renaissance Technologies LLCBuy2,50033,700$22,071
Q1 2015Third Avenue ManagementSell-4,488149,970$102,658
Q1 2015Renaissance Technologies LLCBuy2,30031,200$21,357
Q4 2014Renaissance Technologies LLCBuy6,00028,900$18,210
Q4 2014Third Avenue ManagementSell-27,556154,458$97,326
Q3 2014Bares Capital ManagementBuy5772,503$1,577
Q3 2014Renaissance Technologies LLCBuy40722,900$14,429
Q3 2014Third Avenue ManagementSell-9,633182,014$114,681
Q2 2014Bares Capital ManagementBuy4851,926$1,172
Q2 2014Renaissance Technologies LLCSell-80722,493$13,686
Q2 2014Third Avenue ManagementBuy73191,647$116,605
Q1 2014Bares Capital ManagementSell-241,441$864

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.