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Disclosery

WTM WHITE MTNS INS GROUP LTD

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COM (common), issuer CIK 776867

348 managers (353 13F filers) reported a position in WTM shares at 2025-12-31, 2,249,179 shares in all. 46 filers opened a position and 35 filers sold out during the quarter.

Managers
348
13F filers
353
New
46
Added
104
Reduced
126
Sold out
35
Shares held by filers
2,249,179

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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$434K0.01%013F-HRTimeline
Hudson Value Partners, LLC206$428K0.13%013F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC204$424K<0.01%-40413F-HRTimelineGroup
MGO ONE SEVEN LLC204$424K0.01%+1713F-HRTimeline
Cambridge Investment Research Advisors,…200$416K<0.01%new13F-HRTimeline
Ensign Peak Advisors, Inc200$416K<0.01%-30013F-HR/ATimeline
Evercore Wealth Management, LLC200$416K0.01%013F-HRTimeline
Sage Investment Counsel LLC200$416K0.46%013F-HRTimeline
FOLGER NOLAN FLEMING DOUGLAS CAPITAL MA…199$414K0.04%013F-HRTimeline
GAMMA Investing LLC199$414K0.02%+1613F-HRTimeline
NewEdge Advisors, LLC196$407K<0.01%+2613F-HRTimeline
RITHOLTZ WEALTH MANAGEMENT195$405K0.01%-1313F-HRTimeline
Riverwater Partners LLC190$395K0.15%013F-HRTimeline
BANK OF NOVA SCOTIAin group BANK OF NOVA SCOTIA189$393K<0.01%-1313F-HRTimelineGroup
Savant Capital, LLCin group Savant Capital, LLC180$374K<0.01%-313F-HRTimelineGroup
Frank, Rimerman Advisors LLC178$370K0.02%+113F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…176$366K<0.01%+913F-HRTimelineGroup
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC171$356K<0.01%+2213F-HRTimelineGroup
M&T Bank Corpin group M&T Bank Corp166$345K<0.01%new13F-HR/ATimelineGroup
TWO SIGMA SECURITIES, LLC160$332K0.05%-3413F-HRTimeline
ZACKS INVESTMENT MANAGEMENT157$326K<0.01%013F-HRTimeline
Evelyn Partners Asset Management Ltdin group Evelyn Partners Group Ltd154$320K0.08%013F-HRTimelineGroup
CONNABLE OFFICE INC152$316K0.03%+2313F-HRTimeline
MONETA GROUP INVESTMENT ADVISORS LLC150$312K<0.01%013F-HRTimeline
CreativeOne Wealth, LLCin group CreativeOne Wealth, LLC150$312K0.01%013F-HRTimelineGroup
Douglass Winthrop Advisors, LLC150$312K0.01%013F-HRTimeline
Sterling Capital Management LLC146$303K<0.01%-813F-HRTimeline
HUB Investment Partners, LLC146$303K0.01%-1413F-HRTimeline
EVERGREEN CAPITAL MANAGEMENT LLC143$297K0.01%-313F-HRTimeline
Chapman Investment Management, LLC143$297K0.22%013F-HRTimeline
SYON CAPITAL LLC140$291K0.01%new13F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD138$287K<0.01%-11113F-HRTimeline
Crossmark Global Holdings, Inc.137$285K<0.01%new13F-HRTimeline
Utah Retirement Systems134$278K<0.01%013F-HRTimeline
State of Wyoming134$278K0.03%+5813F-HRTimeline
HRT FINANCIAL LP133$276K<0.01%-3,45413F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding132$274K-7,415Timeline
HB Wealth Management, LLC130$270K<0.01%+413F-HRTimeline
AlphaGrep UK Ltd129$268K0.09%13F-HRTimeline
QUADRANT CAPITAL GROUP LLC128$266K0.01%-513F-HRTimeline
AMALGAMATED BANK127$264K<0.01%+213F-HRTimeline
PINNACLE ASSOCIATES LTD127$264K<0.01%013F-HRTimeline
Columbia Asset Management125$260K0.05%013F-HRTimeline
CIBC Asset Management Inc124$258K<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\124$258K<0.01%+113F-HRTimelineGroup
XPONANCE LLC123$256K<0.01%+313F-HRTimeline
NewEdge Wealth, LLC122$254K<0.01%+513F-HRTimeline
Merit Financial Group, LLC121$252K<0.01%+113F-HRTimeline
State of Alaska, Department of Revenue119$247K<0.01%+213F-HRTimeline
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…117$243K<0.01%new13F-HRTimelineGroup
JOHNSON INVESTMENT COUNSEL INC115$239K<0.01%new13F-HRTimeline
EQUITY INVESTMENT CORP113$235K<0.01%new13F-HRTimeline
Storgate, LLC113$235K0.19%13F-HRTimeline
Kera Capital Partners, Inc.114$233K0.03%new13F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.112$233K<0.01%new13F-HRTimelineGroup
One Wealth Advisors, LLC111$231K0.03%-7213F-HRTimeline
GREAT LAKES ADVISORS, LLC110$229K<0.01%new13F-HRTimeline
SAGESPRING WEALTH PARTNERS, LLC105$218K<0.01%-2713F-HRTimeline
Ballentine Partners, LLC105$218K<0.01%new13F-HRTimeline
Perigon Wealth Management, LLC102$212K<0.01%new13F-HRTimeline
Citadel Investment Advisory, Inc.100$208K0.09%013F-HRTimeline
FIRST MANHATTAN CO. LLC.100$208K<0.01%new13F-HRTimeline
BALDWIN WEALTH PARTNERS LLC/MA100$208K0.01%new13F-HRTimeline
EASTERN BANK100$208K<0.01%013F-HRTimeline
CHICAGO TRUST Co NA100$208K0.03%new13F-HRTimeline
Gladstone Institutional Advisory LLC100$208K0.01%new13F-HRTimeline
Vise Technologies, Inc.100$208K<0.01%-9013F-HRTimeline
Ackerman Asset Management, LLC100$208K0.14%new13F-HRTimeline
CHILDRESS CAPITAL ADVISORS, LLC99$206K0.03%new13F-HRTimeline
Covestor Ltd97$204K0.11%+6913F-HRTimeline
Callan Family Office, LLC97$202K<0.01%new13F-HRTimeline
Eagle Bay Advisors LLC91$189K0.14%new13F-HRTimeline
Blue Trust, Inc.89$185K<0.01%-2413F-HRTimeline
LRI Investments, LLC79$163K0.01%-313F-HRTimeline
KBC Group NVin group KBC Group NV72$150K<0.01%013F-HRTimelineGroup
SG Americas Securities, LLC66$137K<0.01%-12513F-HRTimeline
Smithfield Trust Co64$132K0.01%013F-HRTimeline
Parkside Financial Bank & Trust62$129K0.01%-613F-HRTimeline
Colonial Trust Co / SCin group Colonial Trust Advisors61$127K0.02%013F-HRTimelineGroup
Caitong International Asset Management …61$127K0.03%+4713F-HR/ATimeline
Quent Capital, LLC60$125K0.01%013F-HRTimeline
STRS OHIO59$123K<0.01%-113F-HRTimeline
MAI Capital Management59$123K<0.01%-313F-HRTimeline
SIGNATUREFD, LLC56$116K<0.01%+313F-HRTimeline
Federation des caisses Desjardins du Qu…55$114K<0.01%+513F-HRTimeline
Anchor Investment Management, LLC50$104K0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…50$104K<0.01%+313F-HRTimeline
STEPH & CO49$102K0.03%+2013F-HRTimeline
Parallel Advisors, LLC49$102K<0.01%+413F-HRTimeline
Allworth Financial LP43$89.4K<0.01%+813F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…41$85.2K<0.01%-113F-HRTimelineGroup
VALLEY NATIONAL ADVISERS INC40$83K0.01%013F-HRTimeline
Clearstead Advisors, LLC37$76.9K<0.01%+613F-HRTimeline
Quantbot Technologies LP34$70.7K<0.01%new13F-HRTimeline
Basecamp Wealth Advisors LLC34$70.7K0.02%13F-HRTimeline
WPG Advisers, LLC32$66.5K0.05%013F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …32$66K<0.01%new13F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.26$54K<0.01%+113F-HRTimelineGroup
Quarry LP26$54K0.01%-513F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC26$54K<0.01%-6813F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…25$52K<0.01%+813F-HRTimelineGroup
NOMURA ASSET MANAGEMENT CO LTDin group NOMURA ASSET MANAGEMENT CO LTD22$45.7K<0.01%+1013F-HRTimelineGroup
Keating Financial Advisory Services, In…21$43.6K0.01%13F-HRTimeline
DANSKE BANK A/S20$41.6K<0.01%new13F-HRTimeline
Fortitude Family Office, LLC20$41.6K0.01%-113F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO19$39.5K<0.01%new13F-HRTimelineGroup
DELTA ASSET MANAGEMENT LLC/TN19$39.5K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…19$39.5K<0.01%-40113F-HRTimelineGroup
TD PRIVATE CLIENT WEALTH LLC18$37.4K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC18$37K<0.01%+313F-HRTimelineGroup
Versant Capital Management, Inc17$35.3K<0.01%+113F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP15$31.2K<0.01%+413F-HRTimelineGroup
PRIVATE TRUST CO NA15$31.2K<0.01%013F-HRTimeline
GABLES CAPITAL MANAGEMENT INC.15$31.2K0.01%013F-HRTimeline
Smartleaf Asset Management LLC14$29.1K<0.01%+713F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK14$29.1K<0.01%-213F-HRTimelineGroup
Ancora Advisors LLCin group Ancora Advisors LLC14$29.1K<0.01%new13F-HRTimelineGroup
Torren Management, LLC13$27K0.01%13F-HRTimeline
Capital Advisors, Ltd. LLC12$25K<0.01%013F-HRTimeline
Miller Global Investments, LLC12$24.9K0.02%13F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC12$22.9K<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…10$20.8K<0.01%-2013F-HRTimelineGroup
SJS Investment Consulting Inc.9$18.7K<0.01%013F-HRTimeline
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…9$18.7K<0.01%-213F-HR/ATimelineGroup
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…9$18.4K<0.01%013F-HRTimelineGroup
BFSG, LLC8$16.6K<0.01%new13F-HRTimeline
Bell Investment Advisors, Inc8$16.6K<0.01%013F-HRTimeline
Root Financial Partners, LLC8$16.6K<0.01%013F-HRTimeline
BARTLETT & CO. WEALTH MANAGEMENT LLC8$16.6K<0.01%013F-HRTimeline
CoreFirst Bank & Trust7$14.5K0.01%+313F-HRTimeline
Private Wealth Asset Management, LLC7$14.5K<0.01%013F-HRTimeline
JFS WEALTH ADVISORS, LLC6$12.5K<0.01%+113F-HRTimeline
1620 INVESTMENT ADVISORS, INC.6$12.5K0.01%013F-HRTimeline
MV CAPITAL MANAGEMENT, INC.4$8.31K<0.01%+313F-HRTimeline
SageView Advisory Group, LLC4$8.31K<0.01%new13F-HRTimeline
Pinnacle Wealth Planning Services, Inc.4$8.31K<0.01%new13F-HRTimeline
Crewe Advisors LLC3$6.24K<0.01%new13F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp3$6.23K<0.01%013F-HRTimelineGroup
TRUST CO OF VERMONT3$6.23K<0.01%013F-HRTimeline
TD Capital Management LLC2$4.16K<0.01%013F-HRTimeline
Marquette Asset Management, LLC2$4.16K<0.01%new13F-HRTimeline
Private Wealth Management Group, LLC2$4.16K<0.01%013F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC2$4.16K<0.01%-213F-HRTimelineGroup
Quattro Advisors LLC2$4.16K<0.01%13F-HRTimeline
Kilter Group LLC1$2.08K<0.01%-113F-HRTimeline
ROTHSCHILD INVESTMENT LLC1$2.08K<0.01%013F-HRTimeline
Bruce G. Allen Investments, LLC1$2.08K<0.01%013F-HRTimeline
Financial Network Wealth Advisors LLC1$2.08K<0.01%013F-HRTimeline