WHITE MTNS INS GROUP LTD (WTM) Institutional Ownership Changes & 13F Activity

WHITE MTNS INS GROUP LTD (WTM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Gendell Jeffrey L, Raymond James Financial Inc, Gotham Asset Management, Llc, Qube Research & Technologies Ltd, and T. Rowe Price Investment Management, Inc..

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+3+0.5%617$1.28MQ2 2026Sep 09, 2026
Citadel Advisors LlcBuy+4,533+174.1%7,136$14.80MQ2 2026Sep 02, 2026
Allianz Asset Management GmbhBuy+844844$1.75MQ2 2026Sep 02, 2026
Corient Private Wealth LlcSell-787-56.3%611$1.27MQ2 2026Aug 27, 2026
California State Teachers Retirement SystemSell-126-4.4%2,761$5.72MQ2 2026Aug 24, 2026
Mercer Global Advisors IncBuy+189+21.8%1,055$2.19MQ2 2026Aug 19, 2026
Beacon Pointe Advisors, LlcBuy+178178$369.06KQ2 2026Aug 18, 2026
Empowered Funds, LlcSell-1,181-92.0%103$213.56KQ2 2026Aug 17, 2026
Public Employees Retirement System Of OhioSell-30-4.0%721$1.49MQ2 2026Aug 17, 2026
Gendell Jeffrey LBuy+21,429+56.7%59,243$122.83MQ2 2026Aug 14, 2026
Raymond James Financial IncSell-9,118-38.1%14,833$30.75MQ2 2026Aug 14, 2026
Gotham Asset Management, LlcBuy+8,893+98.3%17,940$37.20MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdBuy+8,657+852.1%9,673$20.06MQ2 2026Aug 14, 2026
T. Rowe Price Investment Management, Inc.Sell-7,276-17.5%34,237$70.99MQ2 2026Aug 14, 2026
Hrt Financial LpBuy+4,385+184.6%6,760$14.02MQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-3,632-23.0%12,151$25.19MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+3,4973,497$7.25MQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+3,418+24.8%17,226$35.72MQ2 2026Aug 14, 2026
Bank Of America CorpSell-3,330-11.7%25,028$51.89MQ2 2026Aug 14, 2026
London Co Of VirginiaSell-3,106-5.4%54,025$112.08MQ2 2026Aug 14, 2026
Sei Investments CoSell-2,990-26.9%8,108$16.81MQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+2,8522,852$5.91MQ2 2026Aug 14, 2026
Aqr Capital Management LlcSell-2,299-29.7%5,439$11.28MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Sell-2,292-25.7%6,618$13.72MQ2 2026Aug 14, 2026
Lighthouse Investment Partners, LlcBuy+1,8681,868$3.87MQ2 2026Aug 14, 2026
Longleaf PartnersSell-1,760-9.3%17,104$35.46MQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+1,394+557.6%1,644$3.41MQ2 2026Aug 14, 2026
Wallace Capital Management Inc.Buy+1,272+1.6%80,067$166.01MQ2 2026Aug 14, 2026
California Public Employees Retirement SystemSell-1,166-18.2%5,248$10.88MQ2 2026Aug 14, 2026
Squarepoint Ops LlcBuy+905905$1.88MQ2 2026Aug 14, 2026
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Frequently asked questions about WTM activity

  • Which institutional owners are buying WTM?

    Institutional owners buying WTM 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 WTM activity?

    "Buy" means an investor increased their reported position in WTM compared to the prior reporting period. This reflects growing exposure to WHITE MTNS INS GROUP LTD (WTM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in WTM increasing?

    Institutional interest in WTM 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.