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Disclosery

WTM WHITE MTNS INS GROUP LTD

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COM (common), issuer CIK 776867

333 managers (338 13F filers) reported a position in WTM shares at 2025-09-30, 2,328,316 shares in all. 43 filers opened a position and 28 filers sold out during the quarter.

Managers
333
13F filers
338
New
43
Added
105
Reduced
103
Sold out
28
Shares held by filers
2,328,316

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Wilmington Savings Fund Society, FSB209$349K0.01%+6913F-HR/ATimeline
RITHOLTZ WEALTH MANAGEMENT208$348K0.01%-613F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC208$348K<0.01%-7113F-HRTimelineGroup
National Wealth Management Group, LLC208$348K0.13%new13F-HRTimeline
Hudson Value Partners, LLC206$344K0.11%013F-HRTimeline
BANK OF NOVA SCOTIAin group BANK OF NOVA SCOTIA202$338K<0.01%+613F-HRTimelineGroup
Evercore Wealth Management, LLC200$334K<0.01%013F-HRTimeline
SummitTX Capital, L.P.200$334K0.01%-9913F-HRTimeline
Sage Investment Counsel LLC200$334K0.37%013F-HRTimeline
NEVILLE RODIE & SHAW INC200$334K0.02%013F-HRTimeline
FOLGER NOLAN FLEMING DOUGLAS CAPITAL MA…199$333K0.03%013F-HRTimeline
TWO SIGMA SECURITIES, LLC194$324K0.05%+2413F-HRTimeline
SG Americas Securities, LLC191$319K<0.01%new13F-HRTimeline
Vise Technologies, Inc.190$318K0.01%-613F-HRTimeline
Riverwater Partners LLC190$318K0.13%+4813F-HRTimeline
Atria Investments, Inc187$313K<0.01%-8213F-HRTimeline
MGO ONE SEVEN LLC187$313K0.01%+1213F-HRTimeline
INCEPTIONR LLC185$309K0.07%new13F-HRTimeline
Savant Capital, LLCin group Savant Capital, LLC183$306K<0.01%-413F-HR/ATimelineGroup
One Wealth Advisors, LLC183$306K0.04%-3213F-HRTimeline
GAMMA Investing LLC183$306K0.02%+113F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC178$298K<0.01%-10113F-HRTimelineGroup
Frank, Rimerman Advisors LLC177$296K0.02%013F-HRTimeline
NewEdge Advisors, LLC170$284K<0.01%013F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…167$279K<0.01%+913F-HRTimelineGroup
Marex Group Ltdin group Marex Group Ltd163$272K<0.01%new13F-HRTimelineGroup
HUB Investment Partners, LLC160$267K0.01%new13F-HRTimeline
ZACKS INVESTMENT MANAGEMENT157$262K<0.01%+913F-HRTimeline
Vestmark Advisory Solutions, Inc.157$262K0.01%new13F-HRTimeline
ELEVATION POINT WEALTH PARTNERS, LLC157$262K0.02%+8113F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC156$261K<0.01%+613F-HRTimelineGroup
Sterling Capital Management LLC154$257K<0.01%-1313F-HRTimeline
Evelyn Partners Asset Management Ltdin group Evelyn Partners Group Ltd154$257K0.06%013F-HRTimelineGroup
MONETA GROUP INVESTMENT ADVISORS LLC150$251K<0.01%013F-HRTimeline
Douglass Winthrop Advisors, LLC150$251K<0.01%-513F-HRTimeline
CreativeOne Wealth, LLCin group CreativeOne Wealth, LLC150$251K0.01%+213F-HRTimelineGroup
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC149$250K<0.01%+2113F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV147$246K<0.01%+2913F-HRTimeline
EVERGREEN CAPITAL MANAGEMENT LLC146$244K0.01%+3113F-HRTimeline
Freestone Grove Partners LP144$241K<0.01%new13F-HRTimeline
Chapman Investment Management, LLC143$239K0.17%013F-HRTimeline
Utah Retirement Systems134$224K<0.01%013F-HRTimeline
QUADRANT CAPITAL GROUP LLC133$222K0.01%013F-HRTimeline
NewEdge Wealth, LLC117$222K<0.01%new13F-HRTimeline
SAGESPRING WEALTH PARTNERS, LLC132$221K<0.01%-113F-HRTimeline
CONNABLE OFFICE INC129$216K0.02%013F-HRTimeline
Requisite Capital Management, LLC129$216K0.04%new13F-HRTimeline
PINNACLE ASSOCIATES LTD127$212K<0.01%013F-HRTimeline
HB Wealth Management, LLC126$211K<0.01%new13F-HRTimeline
AMALGAMATED BANK125$209K<0.01%-513F-HRTimeline
Columbia Asset Management125$209K0.04%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\123$206K<0.01%+813F-HRTimelineGroup
Merit Financial Group, LLC120$201K<0.01%-213F-HR/ATimeline
XPONANCE LLC120$201K<0.01%013F-HRTimeline
Roehl & Yi Investment Advisors, LLC120$201K0.09%013F-HRTimeline
State of Alaska, Department of Revenue117$195K<0.01%new13F-HRTimeline
Blue Trust, Inc.113$189K<0.01%+3613F-HRTimeline
MACQUARIE GROUP LTDin group MACQUARIE GROUP LTD107$179K<0.01%new13F-HRTimelineGroup
EASTERN BANK100$167K<0.01%013F-HRTimeline
Citadel Investment Advisory, Inc.100$167K0.08%013F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC94$157K<0.01%013F-HRTimelineGroup
LRI Investments, LLC82$137K0.01%-813F-HRTimeline
State of Wyoming76$127K0.01%013F-HRTimeline
KBC Group NVin group KBC Group NV72$120K<0.01%013F-HRTimelineGroup
Parkside Financial Bank & Trust68$114K0.01%-313F-HRTimeline
Smithfield Trust Co64$107K<0.01%013F-HRTimeline
MAI Capital Management62$104K<0.01%-113F-HRTimeline
Colonial Trust Co / SCin group Colonial Trust Advisors61$102K0.01%013F-HRTimelineGroup
STRS OHIO60$100K<0.01%-1,51513F-HRTimeline
Quent Capital, LLC60$100K0.01%new13F-HRTimeline
SIGNATUREFD, LLC53$88.6K<0.01%+113F-HRTimeline
Anchor Investment Management, LLC50$83.6K0.01%013F-HRTimeline
Federation des caisses Desjardins du Qu…50$83.6K<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…47$78.6K<0.01%-5813F-HRTimeline
Advisory Services Network, LLC45$75.2K<0.01%new13F-HRTimeline
Parallel Advisors, LLC45$75.2K<0.01%-113F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…42$70.2K<0.01%013F-HRTimelineGroup
VALLEY NATIONAL ADVISERS INC40$66K0.01%013F-HRTimeline
Allworth Financial LP35$58.5K<0.01%+713F-HRTimeline
WPG Advisers, LLC32$53.5K0.04%013F-HRTimeline
Clearstead Advisors, LLC31$51.8K<0.01%-2313F-HRTimeline
Quarry LP31$51.8K0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…30$50.1K<0.01%-1313F-HRTimelineGroup
STEPH & CO29$48.5K0.01%+313F-HRTimeline
Covestor Ltd28$48K0.03%+2213F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.25$41.8K<0.01%013F-HRTimelineGroup
Fortitude Family Office, LLC21$35.1K0.01%013F-HRTimeline
AMERIFLEX GROUP, INC.20$33.4K0.01%new13F-HRTimeline
DELTA ASSET MANAGEMENT LLC/TN19$31.8K<0.01%013F-HRTimeline
TD PRIVATE CLIENT WEALTH LLC18$30.1K<0.01%-1413F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…17$28.4K<0.01%013F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK16$26.7K<0.01%013F-HRTimelineGroup
Versant Capital Management, Inc16$26.7K<0.01%-1713F-HRTimeline
PRIVATE TRUST CO NA15$25.1K<0.01%+113F-HRTimeline
GABLES CAPITAL MANAGEMENT INC.15$25.1K0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC15$25K<0.01%-1613F-HRTimelineGroup
Caitong International Asset Management …14$23.4K0.02%new13F-HRTimeline
Hemington Wealth Management14$23K<0.01%+813F-HRTimeline
NOMURA ASSET MANAGEMENT CO LTDin group NOMURA ASSET MANAGEMENT CO LTD12$20.1K<0.01%013F-HRTimelineGroup
Capital Advisors, Ltd. LLC12$20K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP11$18.9K<0.01%-813F-HRTimelineGroup
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…11$18.4K<0.01%-113F-HRTimelineGroup
Wealthspire Advisors, LLC9$15K<0.01%new13F-HRTimeline
SJS Investment Consulting Inc.9$15K<0.01%new13F-HRTimeline
Bayforest Capital Ltd9$15K0.01%+513F-HRTimeline
Mitsubishi UFJ Trust & Banking Corpgroup of 2 filers holding9$15K-477Timeline
Bell Investment Advisors, Inc8$13.4K<0.01%013F-HRTimeline
Root Financial Partners, LLC8$13.4K<0.01%new13F-HRTimeline
BARTLETT & CO. WEALTH MANAGEMENT LLC8$13.4K<0.01%013F-HRTimeline
Smartleaf Asset Management LLC7$11.7K<0.01%013F-HRTimeline
Private Wealth Asset Management, LLC7$11.7K<0.01%013F-HRTimeline
Binnacle Investments Inc7$11.7K0.01%013F-HRTimeline
LANARK FINANCIAL, INC.7$11.7K<0.01%013F-HRTimeline
PROFFITT & GOODSON INC6$10K<0.01%new13F-HRTimeline
1620 INVESTMENT ADVISORS, INC.6$10K0.01%013F-HRTimeline
JFS WEALTH ADVISORS, LLC5$8.36K<0.01%013F-HRTimeline
Premier Fund Managers Ltd5$8K<0.01%-21613F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC4$6.69K<0.01%+313F-HRTimelineGroup
CoreFirst Bank & Trust4$6.69K<0.01%013F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp3$5.01K<0.01%013F-HRTimelineGroup
TRUST CO OF VERMONT3$5.01K<0.01%013F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management3$5.01K<0.01%-213F-HRTimelineGroup
TD Capital Management LLC2$3.35K<0.01%013F-HRTimeline
Private Wealth Management Group, LLC2$3.34K<0.01%013F-HRTimeline
Kilter Group LLC2$3.34K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC1$1.67K<0.01%new13F-HRTimeline
Tortoise Investment Management, LLC1$1.67K<0.01%013F-HRTimeline
MV CAPITAL MANAGEMENT, INC.1$1.67K<0.01%013F-HRTimeline
Clearstead Trust, LLC1$1.67K<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.1$1.67K<0.01%013F-HRTimeline
Bruce G. Allen Investments, LLC1$1.67K<0.01%013F-HRTimeline
Financial Network Wealth Advisors LLC1$1.67K<0.01%013F-HRTimeline
Cloud Capital Management, LLC1$1K<0.01%new13F-HRTimeline