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Disclosery

WTM WHITE MTNS INS GROUP LTD

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COM (common), issuer CIK 776867

359 managers (368 13F filers) reported a position in WTM shares at 2026-03-31, 2,209,707 shares in all. 43 filers opened a position and 27 filers sold out during the quarter.

Managers
359
13F filers
368
New
43
Added
120
Reduced
111
Sold out
27
Shares held by filers
2,209,707

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
Vestmark Advisory Solutions, Inc.223$490K0.01%-9813F-HRTimeline
NICOLET BANKSHARES INCin group NICOLET BANKSHARES INC223$486K0.02%new13F-HRTimelineGroup
PRINCIPAL SECURITIES, INC.in group PRINCIPAL FINANCIAL GROUP INC215$472K0.01%-113F-HRTimelineGroup
Private Advisor Group, LLC213$468K<0.01%013F-HRTimeline
MGO ONE SEVEN LLC208$457K0.01%+413F-HRTimeline
Hudson Value Partners, LLC206$453K0.14%013F-HRTimeline
Sagewood Asset Management LP204$448K0.14%new13F-HRTimeline
EVERGREEN CAPITAL MANAGEMENT LLC202$444K0.01%+5913F-HRTimeline
GAMMA Investing LLC202$444K0.02%+313F-HRTimeline
SG Americas Securities, LLC201$442K<0.01%+13513F-HRTimeline
Ensign Peak Advisors, Inc200$439K<0.01%013F-HR/ATimeline
Evercore Wealth Management, LLC200$439K0.01%013F-HRTimeline
Sage Investment Counsel LLC200$439K0.49%013F-HRTimeline
Savant Capital, LLCin group Savant Capital, LLC199$437K<0.01%+1913F-HRTimelineGroup
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO199$437K<0.01%+18013F-HRTimelineGroup
FOLGER NOLAN FLEMING DOUGLAS CAPITAL MA…199$437K0.04%013F-HRTimeline
IEQ CAPITAL, LLC198$435K<0.01%new13F-HRTimeline
RITHOLTZ WEALTH MANAGEMENT196$431K0.01%+113F-HRTimeline
NewEdge Advisors, LLC191$420K<0.01%-513F-HR/ATimeline
Wilmington Savings Fund Society, FSB187$411K0.01%-2213F-HRTimeline
Riverwater Partners LLC184$404K0.13%-613F-HRTimeline
XPONANCE LLC182$400K<0.01%+5913F-HRTimeline
State of Wyoming179$393K0.05%+4513F-HRTimeline
BANK OF NOVA SCOTIAin group BANK OF NOVA SCOTIA178$391K<0.01%-1113F-HRTimelineGroup
Frank, Rimerman Advisors LLC178$391K0.03%013F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…176$382K<0.01%-5113F-HRTimeline
M&T Bank Corpin group M&T Bank Corp170$373K<0.01%+413F-HR/ATimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS169$371K<0.01%new13F-HRTimeline
UNITED CAPITAL FINANCIAL ADVISORS, LLCin group UNITED CAPITAL FINANCIAL ADVI…166$365K<0.01%new13F-HRTimelineGroup
SYON CAPITAL LLC164$360K0.02%+2413F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…161$354K<0.01%-1513F-HRTimelineGroup
ZACKS INVESTMENT MANAGEMENT157$345K<0.01%013F-HRTimeline
Evelyn Partners Asset Management Ltdin group Evelyn Partners Group Ltd154$338K0.08%013F-HRTimelineGroup
CONNABLE OFFICE INC152$334K0.03%013F-HRTimeline
HB Wealth Management, LLC151$332K<0.01%+2113F-HRTimeline
MONETA GROUP INVESTMENT ADVISORS LLC150$330K<0.01%013F-HRTimeline
Douglass Winthrop Advisors, LLC150$330K0.01%013F-HRTimeline
CreativeOne Wealth, LLCin group CreativeOne Wealth, LLC150$330K0.01%013F-HRTimelineGroup
HUB Investment Partners, LLC150$330K0.01%+413F-HRTimeline
Chapman Investment Management, LLC143$314K0.26%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\137$301K<0.01%+1313F-HRTimelineGroup
Utah Retirement Systems134$294K<0.01%013F-HRTimeline
AMALGAMATED BANK132$290K<0.01%+513F-HRTimeline
QUADRANT CAPITAL GROUP LLC129$283K0.01%+113F-HR/ATimeline
PINNACLE ASSOCIATES LTD128$281K<0.01%+113F-HRTimeline
Merit Financial Group, LLC125$275K<0.01%+413F-HRTimeline
Columbia Asset Management125$275K0.05%013F-HRTimeline
Kera Capital Partners, Inc.125$275K0.03%+1113F-HRTimeline
HENGEHOLD CAPITAL MANAGEMENT LLC124$272K0.02%-10313F-HRTimeline
CIBC Asset Management Inc124$272K<0.01%013F-HRTimeline
Storgate, LLC124$272K0.21%+1113F-HRTimeline
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC122$268K<0.01%-4913F-HRTimelineGroup
Weiss Asset Management LPin group Weiss Asset Management LP120$264K<0.01%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
State of Alaska, Department of Revenue119$261K<0.01%013F-HRTimeline
FIRST MANHATTAN CO. LLC.115$253K<0.01%+1513F-HRTimeline
One Wealth Advisors, LLC111$244K0.03%013F-HRTimeline
GREAT LAKES ADVISORS, LLC110$242K<0.01%013F-HRTimeline
Catalyst Funds Management Pty Ltd110$242K0.04%new13F-HRTimeline
DNB Asset Management ASin group DNB Asset Management AS105$231K<0.01%new13F-HRTimelineGroup
NewEdge Wealth, LLC105$231K<0.01%-1713F-HRTimeline
Eagle Bay Advisors LLC104$228K0.2%+1313F-HRTimeline
Perigon Wealth Management, LLC102$224K<0.01%013F-HRTimeline
Ballentine Partners, LLC101$222K<0.01%-413F-HRTimeline
Gladstone Institutional Advisory LLC101$222K0.01%+113F-HRTimeline
SAGESPRING WEALTH PARTNERS, LLC101$221K<0.01%-413F-HRTimeline
Citadel Investment Advisory, Inc.100$220K0.11%013F-HRTimeline
BALDWIN WEALTH PARTNERS LLC/MA100$220K0.02%013F-HRTimeline
EASTERN BANK100$220K<0.01%013F-HRTimeline
CHICAGO TRUST Co NA100$220K0.04%013F-HRTimeline
Ackerman Asset Management, LLC100$220K0.15%013F-HRTimeline
EQUITY INVESTMENT CORP99$217K<0.01%-1413F-HRTimeline
Quantum Portfolio Management LLC96$211K0.09%new13F-HR/ATimeline
Vise Technologies, Inc.100$208K<0.01%013F-HRTimeline
Connecticut Capital Management Group, L…94$207K0.2%new13F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC94$206K<0.01%new13F-HRTimelineGroup
CWM, LLCin group CWM, LLC92$202K<0.01%+7413F-HRTimelineGroup
Sterling Capital Management LLC83$182K<0.01%-6313F-HRTimeline
MAI Capital Management81$178K<0.01%+2213F-HRTimeline
Blue Trust, Inc.77$169K<0.01%-1213F-HRTimeline
SIGNATUREFD, LLC75$165K<0.01%+1913F-HRTimeline
KBC Group NVin group KBC Group NV72$158K<0.01%013F-HRTimelineGroup
Federation des caisses Desjardins du Qu…65$143K<0.01%+1013F-HRTimeline
Smithfield Trust Co64$141K0.01%013F-HRTimeline
Colonial Trust Co / SCin group Colonial Trust Advisors61$134K0.02%013F-HRTimelineGroup
STRS OHIO59$130K<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…55$121K<0.01%+513F-HRTimeline
Allworth Financial LP53$116K<0.01%+1013F-HRTimeline
Parallel Advisors, LLC53$116K<0.01%+413F-HR/ATimeline
Anchor Investment Management, LLC50$110K0.01%013F-HRTimeline
STEPH & CO49$108K0.03%013F-HRTimeline
Versant Capital Management, Inc49$108K0.01%+3213F-HRTimeline
Quent Capital, LLC42$92.3K0.01%-1813F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…41$90.1K<0.01%013F-HRTimelineGroup
NORTHWESTERN MUTUAL WEALTH MANAGEMENT COin group NORTHWESTERN MUTUAL INVESTMEN…40$87.9K<0.01%+3113F-HRTimelineGroup
VALLEY NATIONAL ADVISERS INC40$87K0.01%013F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …39$85.7K<0.01%+713F-HRTimelineGroup
Basecamp Wealth Advisors LLC38$83.5K0.02%+413F-HRTimeline
Advisory Services Network, LLC37$81.3K<0.01%new13F-HRTimeline
WPG Advisers, LLC30$65.9K0.05%-213F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…25$54.9K<0.01%+613F-HRTimelineGroup
NOMURA ASSET MANAGEMENT CO LTDin group NOMURA ASSET MANAGEMENT CO LTD22$48.3K<0.01%013F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…21$46.1K<0.01%-413F-HRTimelineGroup
Keating Financial Advisory Services, In…21$46.1K0.01%013F-HRTimeline
Opal Wealth Advisors, LLC20$43.9K0.01%new13F-HRTimeline
Fortitude Family Office, LLC20$43.9K0.01%013F-HRTimeline
Reyes Financial Architecture, Inc.20$43.9K0.04%new13F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC19$42K<0.01%-713F-HRTimelineGroup
CX Institutional19$42K<0.01%new13F-HRTimeline
DELTA ASSET MANAGEMENT LLC/TN19$41.7K<0.01%013F-HRTimeline
LRI Investments, LLC17$37.3K<0.01%-6213F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC16$35.2K<0.01%+213F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP16$34.5K<0.01%+113F-HRTimelineGroup
GABLES CAPITAL MANAGEMENT INC.15$33K0.01%013F-HRTimeline
Global Assets Advisory, LLC15$33K0.01%new13F-HRTimeline
Smartleaf Asset Management LLC15$32.9K<0.01%+113F-HRTimeline
PRIVATE TRUST CO NA14$30.8K<0.01%-113F-HRTimeline
Quantbot Technologies LP13$28.6K<0.01%-2113F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC12$26.4K<0.01%013F-HRTimeline
Miller Global Investments, LLC12$26.4K0.02%013F-HRTimeline
Capital Advisors, Ltd. LLC12$26K<0.01%013F-HRTimeline
TD PRIVATE CLIENT WEALTH LLC11$24.2K<0.01%-713F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…11$24.2K<0.01%+113F-HR/ATimelineGroup
SJS Investment Consulting Inc.10$22K<0.01%+113F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…9$19.8K<0.01%013F-HRTimelineGroup
BFSG, LLC9$19.8K<0.01%+113F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK8$17.6K<0.01%-613F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC8$17.6K<0.01%+713F-HRTimeline
Hillsdale Investment Management Inc.8$17.6K<0.01%new13F-HRTimeline
Bell Investment Advisors, Inc8$17.6K<0.01%013F-HRTimeline
BARTLETT & CO. WEALTH MANAGEMENT LLC8$17.3K<0.01%013F-HRTimeline
CoreFirst Bank & Trust7$15.4K0.01%013F-HRTimeline
Private Wealth Asset Management, LLC7$15.4K<0.01%013F-HRTimeline
JFS WEALTH ADVISORS, LLC6$13.2K<0.01%013F-HRTimeline
Pinnacle Wealth Planning Services, Inc.6$13.2K<0.01%+213F-HRTimeline
1620 INVESTMENT ADVISORS, INC.6$13.2K0.01%013F-HRTimeline
MATHER GROUP, LLC.5$11K<0.01%new13F-HRTimeline
Covestor Ltd4$9K0.01%-9313F-HRTimeline
Clearstead Advisors, LLC4$8.79K<0.01%-3313F-HRTimeline
MV CAPITAL MANAGEMENT, INC.4$8.79K<0.01%013F-HRTimeline
Root Financial Partners, LLC4$8.79K<0.01%-413F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp3$6.59K<0.01%013F-HRTimelineGroup
Marquette Asset Management, LLC3$6.59K<0.01%+113F-HRTimeline
Parkside Financial Bank & Trust3$6.59K<0.01%-5913F-HRTimeline
Crewe Advisors LLC3$6.59K<0.01%013F-HRTimeline
Larson Financial Group LLC3$6.59K<0.01%new13F-HRTimeline
TWIN PEAKS WEALTH ADVISORS, LLC3$6.59K<0.01%new13F-HRTimeline
Whipplewood Advisors, LLC3$6.59K<0.01%new13F-HRTimeline
TD Capital Management LLC2$4.4K<0.01%013F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC2$4.39K<0.01%013F-HRTimelineGroup
CVA Family Office, LLC2$4.39K<0.01%new13F-HRTimeline
True Wealth Design, LLC2$4.39K<0.01%new13F-HRTimeline
Private Wealth Management Group, LLC2$4.39K<0.01%013F-HRTimeline
FIRST HORIZON CORP1$2.2K<0.01%new13F-HRTimeline
SHP Wealth Management1$2.2K<0.01%new13F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC1$2.2K<0.01%new13F-HRTimeline
Bare Financial Services, Inc1$2.2K<0.01%new13F-HRTimeline
Financial Network Wealth Advisors LLC1$2.2K<0.01%013F-HRTimeline
Kilter Group LLC1$2.2K<0.01%013F-HRTimeline
Burk Holdings LLC1$2.2K<0.01%new13F-HRTimeline