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 Form 13F filings. 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 quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Longleaf PartnersSell-12,78818,864$41,443,454
Q1 2026Renaissance Technologies LLCBuy1,1102,611$5,736,263
Q1 2026Sequoia Financial AdvisorsSell-82824$1,809,510
Q4 2025Renaissance Technologies LLCSell-3501,501$3,119,123
Q4 2025Sequoia Financial AdvisorsBuy88906$1,881,689
Q3 2025Longleaf PartnersBuy10,55831,652$52,906,951
Q3 2025Renaissance Technologies LLCBuy1,2511,851$3,093,984
Q3 2025Sequoia Financial AdvisorsSell-12818$1,366,591
Q2 2025Longleaf PartnersBuy2,61021,094$37,878,918
Q2 2025Sequoia Financial AdvisorsBuy4830$1,489,785
Q1 2025Longleaf PartnersSell-76018,484$35,596,671
Q1 2025Sequoia Financial AdvisorsSell-91826$1,590,009
Q4 2024Longleaf PartnersSell-1,49419,244$37,430,734
Q4 2024Renaissance Technologies LLCSell-1,300600$1,167,036
Q4 2024Sequoia Financial AdvisorsBuy33917$1,784,385
Q3 2024Sequoia Financial AdvisorsBuy689884$1,500,108
Q3 2024Longleaf PartnersSell-68520,738$35,176
Q3 2024Renaissance Technologies LLCSell-1001,900$3,222,780
Q2 2024Longleaf PartnersSell-3,28521,423$38,935,231
Q2 2024Renaissance Technologies LLCSell-4002,000$3,634,900
Q1 2024Longleaf PartnersSell-7,73824,708$44,333,564
Q1 2024Renaissance Technologies LLCSell-7002,400$4,306
Q1 2024Sequoia Financial AdvisorsSell-330195$349,889
Q4 2023Longleaf PartnersSell-49932,446$48,831,555
Q4 2023Sequoia Financial AdvisorsBuy329525$790,131
Q4 2023Renaissance Technologies LLCSell-2003,100$4,666
Q3 2023Longleaf PartnersSell-9,27232,945$49,275,507
Q3 2023Renaissance Technologies LLCBuy5003,300$4,936
Q2 2023Longleaf PartnersSell-11,31642,217$58,635,613
Q2 2023Renaissance Technologies LLCBuy1,1002,800$3,889

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.

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