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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
VANGUARD GROUP INCgroup of 2 filers holding235,951$490M-11,293Timeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP156,604$325M0.07%-61313F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC129,654$269M0.2%+14,63913F-HRTimelineGroup
River Road Asset Management, LLC120,880$251M2.76%+11,29213F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.112,289$233M<0.01%-29013F-HRTimelineGroup
FULLER & THALER ASSET MANAGEMENT, INC.108,172$225M0.76%+8113F-HR/ATimeline
COOKE & BIELER LP106,579$221M2.31%-1,27213F-HRTimeline
FIDUCIARY MANAGEMENT INC /WI/90,333$188M2.06%-4,05013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY82,151$171M0.01%-56,71113F-HR/ATimelineGroup
Wallace Capital Management Inc.80,347$167M20.1%-1,14213F-HRTimeline
Boston Partnersin group Boston Trust Walden Corp76,911$160M0.17%-7,53413F-HRTimelineGroup
LONDON CO OF VIRGINIA58,697$122M0.7%-8,10513F-HRTimeline
STATE STREET CORPin group STATE STREET CORP50,663$105M<0.01%-3,78113F-HRTimelineGroup
T. Rowe Price Investment Management, In…44,560$92.6M0.06%-3,21213F-HR/ATimeline
REINHART PARTNERS, LLC.43,973$91.4M2.74%+2,36413F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC41,518$86.3M0.01%-57213F-HRTimelineGroup
LORD, ABBETT & CO. LLC33,796$70.2M0.22%-3,12313F-HRTimeline
GENDELL JEFFREY Lin group GENDELL JEFFREY L32,520$67.6M1.18%new13F-HRTimelineGroup
NORGES BANK32,184$66.9M0.01%new13F-HRTimeline
SOUTHEASTERN ASSET MANAGEMENT INC/TN/31,652$65.8M2.93%013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/28,809$59.9M<0.01%-10,00313F-HRTimelineGroup
Cannell & Spears LLC28,115$58.4M1.09%-17313F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC23,969$49.8M0.02%-5,42313F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co23,238$48.3M0.01%-99413F-HRTimelineGroup
Mraz, Amerine & Associates, Inc.22,629$47M6.99%+2313F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …20,193$41.2M0.07%-11,50513F-HRTimelineGroup
Select Equity Group, L.P.19,713$41M0.19%+2,76713F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC18,956$39.4M0.05%-1,37613F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP16,667$34.6M<0.01%-1,09013F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCgroup of 2 filers holding16,059$33.4M-1,786Timeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…15,928$33.1M0.01%-3,28313F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding13,656$28.4M+1,564Timeline
ELKHORN PARTNERS LIMITED PARTNERSHIPin group ELKHORN PARTNERS LIMITED PART…13,598$28.3M17.85%-1,21213F-HRTimelineGroup
HORIZON KINETICS ASSET MANAGEMENT LLC13,121$27.3M0.37%+3713F-HRTimeline
WCM INVESTMENT MANAGEMENT, LLC10,682$22.2M0.05%-2,55313F-HRTimeline
SPEECE THORSON CAPITAL GROUP INC10,672$22.2M4.8%-59013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN9,141$19M<0.01%-21113F-HRTimelineGroup
THOMPSON SIEGEL & WALMSLEY LLC8,927$18.6M0.31%+27513F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp8,831$18.4M<0.01%-1,27113F-HRTimelineGroup
GW&K Investment Management, LLC8,621$17.9M0.15%+61113F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.8,593$17.9M0.01%+6,08113F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO7,916$16.5M0.02%+2,53013F-HRTimelineGroup
Quantinno Capital Management LP7,271$15.1M0.03%+1,21713F-HRTimeline
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC6,752$14M0.04%-35413F-HRTimeline
California Public Employees Retirement …6,716$14M0.01%-2,51613F-HRTimeline
Gotham Asset Management, LLC6,716$14M0.05%-18313F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC6,296$13.1M0.01%-2,23013F-HRTimeline
ROYCE & ASSOCIATES LP5,947$12.4M0.13%-35513F-HRTimeline
Phocas Financial Corp.5,491$11.4M1.48%-1413F-HR/ATimeline
BRADLEY FOSTER & SARGENT INC/CT5,456$11.3M0.17%-9013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC5,260$10.9M<0.01%-65113F-HR/ATimelineGroup
Williams Jones Wealth Management, LLC.5,193$10.8M0.12%013F-HRTimeline
Swiss National Bank5,086$10.6M0.01%+14013F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP4,555$9.47M0.01%new13F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC4,476$9.3M<0.01%-1,43713F-HRTimelineGroup
RHUMBLINE ADVISERS4,165$8.65M0.01%-6713F-HRTimeline
Franklin Resourcesgroup of 3 filers holding3,726$7.74M+4Timeline
DARK FOREST CAPITAL MANAGEMENT LP3,615$7.51M0.34%new13F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC3,543$7.36M0.01%+1,60313F-HRTimelineGroup
Nuveen, LLCin group TIAA3,475$7.22M<0.01%+1713F-HRTimelineGroup
Creative Planningin group Creative Planning3,415$7.1M0.01%+31313F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS3,340$6.94M<0.01%+1,80413F-HRTimelineGroup
LEE DANNER & BASS INC3,103$6.45M0.46%-4513F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC3,053$6.34M<0.01%+2513F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc3,037$6.31M<0.01%-1,01213F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.2,995$6.22M<0.01%-32213F-HRTimelineGroup
MML INVESTORS SERVICES, LLC2,935$6.1M0.01%+8313F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…2,792$5.8M0.01%-35013F-HRTimeline
Triad Investment Management2,548$5.29M5.36%13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND2,513$5.22M0.01%-613F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,457$5.11M0.01%+2413F-HRTimeline
DAVENPORT & Co LLC2,123$4.41M0.02%-5013F-HRTimeline
Forum Financial Management, LPin group Forum Financial Management, LP2,016$4.19M0.05%013F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/1,990$4.14M<0.01%+10813F-HRTimeline
LPL Financial LLC1,965$4.08M<0.01%-34113F-HRTimeline
PARSONS CAPITAL MANAGEMENT INC/RI1,872$3.89M0.21%-1013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC1,849$3.84M<0.01%+36013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,806$3.75M<0.01%-2,51613F-HRTimelineGroup
Atlantic Union Bankshares Corpin group Atlantic Union Bankshares Corp1,765$3.67M0.07%013F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC1,707$3.55M<0.01%-3,11313F-HRTimelineGroup
Regency Capital Management Inc.\DE1,635$3.4M1.41%+82413F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …1,502$3.12M0.04%-7013F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC1,501$3.12M<0.01%-35013F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth1,610$3.1M<0.01%+25713F-HRTimelineGroup
HighTower Advisors, LLC1,447$3.01M<0.01%-1813F-HRTimeline
AGF MANAGEMENT LTDin group AGF MANAGEMENT LTD1,408$2.93M0.01%-37213F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP1,312$2.73M<0.01%-413F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC1,193$2.48M<0.01%+91213F-HRTimelineGroup
Aquatic Capital Management LLC1,180$2.45M0.07%+41513F-HRTimeline
1834 INVESTMENT ADVISORS CO1,176$2.44M0.31%013F-HRTimeline
PECAUT & CO.1,167$2.43M0.78%013F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…1,135$2.36M0.01%-2013F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson1,123$2.34M<0.01%013F-HRTimelineGroup
LEUTHOLD GROUP, LLC1,117$2.32M0.25%-8913F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,098$2.28M<0.01%new13F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,097$2.28M<0.01%-67313F-HRTimelineGroup
Autumn Glory Partners, LLC1,080$2.24M0.79%013F-HRTimeline
Police & Firemen's Retirement System of…1,070$2.22M0.02%-4713F-HRTimeline
Treasurer of the State of North Carolina1,034$2.15M0.01%-9113F-HRTimeline
TD Asset Management Inc1,000$2.08M<0.01%-16613F-HRTimeline
Holocene Advisors, LP998$2.07M<0.01%+15913F-HRTimeline
FMR LLCin group FMR LLC939$1.95M<0.01%+31413F-HRTimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC934$1.94M0.01%-4913F-HRTimeline
BRAVE ASSET MANAGEMENT INC924$1.92M0.45%013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…913$1.9M<0.01%+66013F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP906$1.88M<0.01%+30813F-HR/ATimelineGroup
Sequoia Financial Advisors, LLC906$1.88M0.01%+8813F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC895$1.86M<0.01%-1,34713F-HRTimelineGroup
Handelsbanken Fonder AB880$1.83M0.01%-22013F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.864$1.79M0.14%+1213F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC856$1.78M<0.01%-7813F-HRTimelineGroup
EQUITABLE TRUST CO840$1.75M0.08%+5313F-HRTimeline
Main Street Financial Solutions, LLC835$1.74M0.13%-42613F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …811$1.69M<0.01%new13F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.807$1.68M<0.01%-14813F-HRTimeline
REGIONS FINANCIAL CORPin group REGIONS FINANCIAL CORP792$1.65M0.01%013F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…776$1.61M0.01%-3813F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…767$1.59M0.01%013F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC761$1.58M0.01%+5913F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP736$1.53M<0.01%-43713F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC734$1.53M0.01%013F-HRTimeline
PRIVATE MANAGEMENT GROUP INC726$1.51M0.04%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM718$1.49M0.01%-4413F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV715$1.49M<0.01%+56813F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC706$1.47M<0.01%+52813F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS705$1.47M<0.01%-213F-HRTimeline
Texas Yale Capital Corp.687$1.43M0.04%+713F-HRTimeline
Ethic Inc.672$1.4M0.02%-7113F-HRTimeline
BRANDES INVESTMENT PARTNERS, LPin group BRANDES INVESTMENT PARTNERS, …665$1.38M0.01%+5113F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC658$1.37M0.02%new13F-HRTimelineGroup
&PARTNERS638$1.33M0.01%+1513F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…623$1.29M<0.01%-16,61613F-HRTimelineGroup
Avior Wealth Management, LLC617$1.28M0.04%013F-HRTimeline
Summit Trail Advisors, LLC600$1.25M0.02%-22813F-HRTimeline
KLP KAPITALFORVALTNING AS595$1.24M<0.01%-1013F-HRTimeline
AMG National Trust Bank595$1.24M0.03%+1813F-HRTimeline
Farther Finance Advisors, LLC570$1.18M0.01%+9413F-HRTimeline
Sendero Wealth Management, LLC562$1.17M0.13%013F-HRTimeline
KING LUTHER CAPITAL MANAGEMENT CORP560$1.16M<0.01%013F-HRTimeline
Jain Global LLC559$1.16M0.01%+26013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC559$1.16M<0.01%-39313F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …555$1.15M<0.01%+2113F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…536$1.11M<0.01%+9813F-HRTimelineGroup
B.O.S.S. Retirement Advisors, LLC533$1.11M0.35%013F-HRTimeline
Qube Research & Technologies Ltd532$1.11M<0.01%-10413F-HRTimeline
Oak Thistle LLC530$1.1M0.15%-12713F-HRTimeline
Edgestream Partners, L.P.529$1.1M0.03%-84213F-HRTimeline
Chicago Partners Investment Group LLC523$1.08M0.03%+713F-HRTimeline
Caprock Group, LLC509$1.06M0.02%+1713F-HRTimeline
PROSPECTOR PARTNERS LLCin group PROSPECTOR PARTNERS LLC490$1.02M2.18%-3,29313F-HRTimelineGroup
Entropy Technologies, LP490$1.02M0.06%new13F-HRTimeline
Janney Montgomery Scott LLC482$1M<0.01%+2013F-HRTimeline
Sanctuary Advisors, LLC475$987K0.01%-2013F-HRTimeline
Parker Investment Management, LLC475$987K0.14%-2513F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC455$946K<0.01%+6313F-HRTimelineGroup
Legacy Advisors, LLC450$935K0.1%013F-HRTimeline
Resona Asset Management Co.,Ltd.in group Resona Asset Management Co.,L…443$921K<0.01%-913F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/431$896K<0.01%-113F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.410$852K<0.01%-313F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC402$835K<0.01%+18813F-HRTimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…400$831K<0.01%+5013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…397$826K<0.01%+4613F-HRTimelineGroup
Midwest Professional Planners, LTD.388$806K0.19%-23413F-HRTimeline
Global Retirement Partners, LLC388$806K0.01%+4513F-HRTimeline
KLINGENSTEIN FIELDS & CO LP380$790K0.03%013F-HRTimeline
Cetera Investment Advisers364$757K<0.01%013F-HRTimeline
CHOREO, LLC364$757K0.01%-3213F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd360$748K0.01%new13F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …359$746K<0.01%+6713F-HRTimelineGroup
Roundview Capital LLC358$744K0.05%-1513F-HRTimeline
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA354$736K<0.01%13F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…353$734K<0.01%013F-HRTimeline
American Capital Advisory, LLC342$711K0.31%-1513F-HRTimeline
Bryant Woods Investment Advisors, LLC340$707K0.27%013F-HRTimeline
LECAP ASSET MANAGEMENT LTD340$707K0.28%new13F-HRTimeline
Lummis Asset Management, LP325$675K0.42%013F-HRTimeline
Vestmark Advisory Solutions, Inc.321$667K0.01%+16413F-HRTimeline
Legacy Wealth Asset Management, LLC313$650K0.16%+513F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…300$624K<0.01%+8013F-HR/ATimelineGroup
Brown Miller Wealth Management, LLC298$620K0.17%013F-HRTimeline
Greenland Capital Management LP290$603K0.09%new13F-HRTimeline
Arax Advisory Partners281$585K0.02%-22713F-HRTimeline
Highlander Partners, L.P.280$582K0.21%013F-HRTimeline
Cresset Asset Management, LLC279$580K<0.01%-513F-HRTimeline
Essex Bankin group Essex Financial Services, Inc.275$571K0.12%-913F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC271$563K<0.01%-2913F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC243$505K<0.01%+3513F-HRTimelineGroup
Shotwell Rutter Baer Inc242$502K0.3%-2813F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\237$492K<0.01%+313F-HRTimelineGroup
WEDBUSH SECURITIES INC229$476K0.01%+513F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd229$476K0.01%new13F-HRTimelineGroup
Athena Investment Management229$476K0.24%013F-HRTimeline
NICOLET ADVISORY SERVICES, LLCin group NICOLET BANKSHARES INC230$474K0.03%+1713F-HRTimelineGroup
HENGEHOLD CAPITAL MANAGEMENT LLC227$472K0.04%-16713F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…227$465K<0.01%+1713F-HRTimeline
ELEVATION POINT WEALTH PARTNERS, LLC223$463K0.02%+6613F-HRTimeline
Venturi Wealth Management, LLC221$459K0.02%+713F-HRTimeline
PRINCIPAL SECURITIES, INC.in group PRINCIPAL FINANCIAL GROUP INC216$449K0.01%+613F-HRTimelineGroup
Private Advisor Group, LLC213$443K<0.01%+213F-HRTimeline
Atria Investments, Inc209$434K<0.01%+2213F-HRTimeline