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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
VANGUARD GROUP INCgroup of 7 filers holding244,160$536M+243,907Timeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP156,618$344M0.07%+1413F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC124,715$274M0.21%-4,93913F-HRTimelineGroup
River Road Asset Management, LLC120,519$265M3%-36113F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.113,328$249M<0.01%+1,03913F-HRTimelineGroup
COOKE & BIELER LP104,857$230M2.61%-1,72213F-HRTimeline
FULLER & THALER ASSET MANAGEMENT, INC.104,561$230M0.77%-3,61113F-HRTimeline
FIDUCIARY MANAGEMENT INC /WI/85,066$187M2.32%-5,26713F-HRTimeline
Wallace Capital Management Inc.78,795$173M19.88%-1,55213F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY59,295$130M0.01%-22,85613F-HRTimelineGroup
Boston Partnersin group Boston Trust Walden Corp57,459$126M0.13%-19,45213F-HRTimelineGroup
LONDON CO OF VIRGINIA57,131$126M0.77%-1,56613F-HRTimeline
STATE STREET CORPin group STATE STREET CORP49,158$108M<0.01%-1,50513F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC42,119$92.6M0.01%+60113F-HRTimelineGroup
T. Rowe Price Investment Management, In…41,513$91.2M0.06%-3,04713F-HRTimeline
GENDELL JEFFREY Lin group GENDELL JEFFREY L37,814$83.1M1.13%+5,29413F-HRTimelineGroup
REINHART PARTNERS, LLC.37,374$82.1M2.36%-6,59913F-HRTimeline
LORD, ABBETT & CO. LLC33,110$72.7M0.24%-68613F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/28,358$62.3M<0.01%-45113F-HRTimelineGroup
Cannell & Spears LLC28,027$61.6M1.21%-8813F-HR/ATimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co24,241$53.3M0.01%+1,00313F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC23,951$52.6M0.02%-1813F-HRTimelineGroup
Mraz, Amerine & Associates, Inc.22,179$48.7M7.18%-45013F-HRTimeline
SOUTHEASTERN ASSET MANAGEMENT INC/TN/18,864$41.4M2.04%-12,78813F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …18,612$40.5M0.07%-1,58113F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding18,267$40.1M+4,611Timeline
BROWN ADVISORY INCin group BROWN ADVISORY INC17,844$39.2M0.06%-1,11213F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC15,783$34.7M<0.01%+10,52313F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCgroup of 2 filers holding15,563$34.2M-496Timeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP15,495$34M<0.01%-1,17213F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…14,884$32.7M0.01%-1,04413F-HRTimelineGroup
Boussard & Gavaudan Investment Manageme…13,975$31M2.97%new13F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC13,808$30.3M0.03%+12,10113F-HRTimelineGroup
HORIZON KINETICS ASSET MANAGEMENT LLC13,112$28.8M0.31%-913F-HRTimeline
ELKHORN PARTNERS LIMITED PARTNERSHIPin group ELKHORN PARTNERS LIMITED PART…12,700$27.9M17.76%-89813F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC11,145$24.5M0.02%+4,84913F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO11,098$24.4M0.02%+3,18213F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…10,965$24.1M0.03%+10,83313F-HRTimelineGroup
Select Equity Group, L.P.10,560$23.2M0.12%-9,15313F-HRTimeline
Quantinno Capital Management LP9,784$21.5M0.04%+2,51313F-HRTimeline
SPEECE THORSON CAPITAL GROUP INC9,397$20.6M4.7%-1,27513F-HRTimeline
Gotham Asset Management, LLC9,047$19.9M0.06%+2,33113F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.8,910$19.6M0.02%+31713F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN8,782$19.3M<0.01%-35913F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp8,444$18.6M<0.01%-38713F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC8,308$18.3M0.01%+7,41313F-HRTimelineGroup
GW&K Investment Management, LLC7,926$17.4M0.15%-69513F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC7,738$17M0.01%+3,26213F-HRTimelineGroup
THOMPSON SIEGEL & WALMSLEY LLC7,209$15.8M0.28%-1,71813F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS6,623$14.6M0.01%+3,28313F-HRTimelineGroup
ROYCE & ASSOCIATES LP6,460$14.2M0.14%+51313F-HRTimeline
California Public Employees Retirement …6,414$14.1M0.01%-30213F-HRTimeline
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC6,048$13.3M0.04%-70413F-HRTimeline
WCM INVESTMENT MANAGEMENT, LLC5,995$13.2M0.03%-4,68713F-HRTimeline
Williams Jones Wealth Management, LLC.5,194$11.4M0.14%+113F-HRTimeline
Swiss National Bank5,036$11.1M0.01%-5013F-HRTimeline
Franklin Resourcesgroup of 2 filers holding4,898$10.8M+4,398Timeline
Nuveen, LLCin group TIAA4,309$9.47M<0.01%+83413F-HRTimelineGroup
Phocas Financial Corp.4,292$9.43M1.48%-1,19913F-HRTimeline
RHUMBLINE ADVISERS4,132$9.08M0.01%-3313F-HRTimeline
Creative Planningin group Creative Planning4,049$8.9M0.01%+63413F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP3,878$8.52M0.01%+2,78013F-HRTimelineGroup
LEE DANNER & BASS INC3,203$7.04M0.44%+10013F-HRTimeline
Edgestream Partners, L.P.3,130$6.88M0.23%+2,60113F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP3,058$6.72M<0.01%-1,49713F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.2,967$6.52M<0.01%-2813F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,887$6.34M0.01%+43013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC2,866$6.3M<0.01%-18713F-HR/ATimelineGroup
RENAISSANCE TECHNOLOGIES LLC2,611$5.74M0.01%+1,11013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC2,603$5.72M<0.01%+1,41013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO2,567$5.63M<0.01%+76113F-HR/ATimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND2,513$5.52M0.01%013F-HRTimeline
Triad Investment Management2,513$5.52M6.52%-3513F-HR/ATimeline
MML INVESTORS SERVICES, LLC2,459$5.4M0.01%-47613F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc2,408$5.29M<0.01%-62913F-HRTimelineGroup
HRT FINANCIAL LP2,375$5.22M0.01%+2,24213F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…2,261$4.97M0.01%-53113F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP2,255$4.95M0.44%-1,36013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/2,211$4.86M<0.01%+22113F-HRTimeline
Robeco Institutional Asset Management B…in group Robeco Institutional Asset Ma…2,179$4.79M0.01%+1,55613F-HRTimelineGroup
DAVENPORT & Co LLC2,123$4.66M0.03%013F-HRTimeline
BRADLEY FOSTER & SARGENT INC/CT2,002$4.4M0.07%-3,45413F-HR/ATimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …1,913$4.2M<0.01%+1,10213F-HRTimelineGroup
PARSONS CAPITAL MANAGEMENT INC/RI1,888$4.15M0.19%+1613F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC1,867$4.1M0.01%-1,67613F-HRTimelineGroup
Focus Partners Wealthgroup of 2 filers holding1,228$4.03M-382Timeline
Atlantic Union Bankshares Corpin group Atlantic Union Bankshares Corp1,765$3.88M0.07%013F-HRTimelineGroup
AGF MANAGEMENT LTDin group AGF MANAGEMENT LTD1,703$3.74M0.02%+29513F-HRTimelineGroup
Regency Capital Management Inc.\DE1,535$3.37M1.51%-10013F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …1,480$3.25M0.04%-2213F-HRTimelineGroup
HighTower Advisors, LLC1,447$3.18M<0.01%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC1,400$3.08M<0.01%-44913F-HRTimelineGroup
LPL Financial LLC1,395$3.07M<0.01%-57013F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP1,398$3.02M<0.01%+49213F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC1,348$2.96M0.01%+1,14413F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP1,294$2.84M<0.01%-1813F-HRTimelineGroup
Empowered Funds, LLC1,284$2.82M0.02%new13F-HR/ATimeline
CAPTRUST FINANCIAL ADVISORS1,235$2.71M<0.01%+53013F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd1,213$2.66M0.03%+85313F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,195$2.63M<0.01%+9813F-HRTimelineGroup
1834 INVESTMENT ADVISORS CO1,176$2.58M0.32%013F-HRTimeline
PECAUT & CO.1,172$2.57M0.84%+513F-HRTimeline
DIVERSIFIED MANAGEMENT INC1,158$2.54M0.44%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…1,142$2.51M<0.01%+74513F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…1,135$2.49M0.01%013F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson1,123$2.46M<0.01%013F-HR/ATimelineGroup
Police & Firemen's Retirement System of…1,082$2.38M0.02%+1213F-HRTimeline
Autumn Glory Partners, LLC1,080$2.37M0.87%013F-HRTimeline
Treasurer of the State of North Carolina1,056$2.32M0.01%+2213F-HRTimeline
LEUTHOLD GROUP, LLC1,052$2.31M0.25%-6513F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.1,038$2.28M0.18%+17413F-HRTimeline
Qube Research & Technologies Ltd1,016$2.23M<0.01%+48413F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC1,010$2.22M0.01%+7613F-HRTimeline
TD Asset Management Inc932$2.05M<0.01%-6813F-HRTimeline
BRAVE ASSET MANAGEMENT INC924$2.03M0.48%013F-HRTimeline
Capula Management Ltdin group Capula Management Ltd921$2.02M0.02%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Zurcher Kantonalbank (Zurich Cantonalba…913$2.01M<0.01%013F-HRTimeline
Aquatic Capital Management LLC912$2M0.06%-26813F-HRTimeline
FMR LLCin group FMR LLC905$1.99M<0.01%-3413F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.953$1.98M<0.01%+14613F-HRTimeline
Handelsbanken Fonder AB880$1.93M0.01%013F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV866$1.9M<0.01%+15113F-HRTimeline
EQUITABLE TRUST CO830$1.82M0.08%-1013F-HRTimeline
Sequoia Financial Advisors, LLC824$1.81M0.01%-8213F-HRTimeline
PRIVATE MANAGEMENT GROUP INC823$1.81M0.05%+9713F-HRTimeline
Ethic Inc.800$1.76M0.03%+12813F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…767$1.69M0.01%013F-HRTimeline
Summit Trail Advisors, LLC760$1.67M0.02%+16013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…751$1.65M0.01%-2513F-HRTimeline
NISA INVESTMENT ADVISORS, LLC738$1.62M0.01%+413F-HRTimeline
Fieldview Capital Management, LLC729$1.6M0.47%new13F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC703$1.54M0.01%-5813F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM699$1.54M0.01%-1913F-HRTimeline
BRANDES INVESTMENT PARTNERS, LPin group BRANDES INVESTMENT PARTNERS, …698$1.53M0.01%+3313F-HRTimelineGroup
Texas Yale Capital Corp.687$1.51M0.04%013F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP684$1.5M<0.01%-5213F-HRTimelineGroup
Farther Finance Advisors, LLC656$1.43M0.01%+8613F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.650$1.43M<0.01%+24013F-HRTimelineGroup
Avior Wealth Management, LLC617$1.36M0.04%013F-HRTimeline
Amundiin group Amundi615$1.35M<0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …614$1.35M<0.01%+5913F-HRTimelineGroup
ExodusPoint Capital Management, LP611$1.34M0.01%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC607$1.33M<0.01%+20513F-HRTimelineGroup
&PARTNERS598$1.31M0.01%-4013F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP581$1.28M0.01%new13F-HRTimelineGroup
AMG National Trust Bank571$1.25M0.03%-2413F-HRTimeline
KLP KAPITALFORVALTNING AS565$1.24M<0.01%-3013F-HRTimeline
Sendero Wealth Management, LLC562$1.23M0.14%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…546$1.2M<0.01%+1013F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC535$1.18M<0.01%-2413F-HRTimelineGroup
B.O.S.S. Retirement Advisors, LLC533$1.17M0.36%013F-HRTimeline
Lexington Hill Partners, LLC520$1.14M0.65%new13F-HRTimeline
REGIONS FINANCIAL CORPin group REGIONS FINANCIAL CORP517$1.14M0.01%-27513F-HRTimelineGroup
Janney Montgomery Scott LLC510$1.12M<0.01%+2813F-HRTimeline
Chicago Partners Investment Group LLC467$1.06M0.02%-5613F-HRTimeline
Parker Investment Management, LLC475$1.04M0.16%013F-HRTimeline
Entropy Technologies, LP470$1.03M0.05%-2013F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC460$1.01M<0.01%+513F-HRTimelineGroup
Legacy Advisors, LLC450$989K0.12%013F-HRTimeline
Resona Asset Management Co.,Ltd.in group Resona Asset Management Co.,L…443$973K<0.01%013F-HRTimelineGroup
Main Street Financial Solutions, LLC439$963K0.07%-39613F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/433$951K<0.01%+213F-HRTimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…430$945K<0.01%+3013F-HRTimelineGroup
Sanctuary Advisors, LLC418$919K<0.01%-5713F-HRTimeline
Bridgewater Associates, LP414$910K<0.01%new13F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …405$890K<0.01%+4613F-HRTimelineGroup
Jain Global LLC396$870K0.01%-16313F-HRTimeline
Midwest Professional Planners, LTD.395$868K0.2%+713F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC387$850K<0.01%-46913F-HRTimelineGroup
KLINGENSTEIN FIELDS & CO LP380$835K0.03%013F-HRTimeline
Roundview Capital LLC358$787K0.05%013F-HRTimeline
NATIXISin group Natixis Investment Managers356$782K<0.01%new13F-HRTimelineGroup
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA354$778K<0.01%013F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…353$776K<0.01%013F-HRTimeline
Cetera Investment Advisers346$761K<0.01%-1813F-HRTimeline
CHOREO, LLC346$760K0.01%-1813F-HRTimeline
American Capital Advisory, LLC342$751K0.3%013F-HRTimeline
Caprock Group, LLC340$747K0.02%-16913F-HRTimeline
Bryant Woods Investment Advisors, LLC340$747K0.27%013F-HRTimeline
Lummis Asset Management, LP325$725K0.43%013F-HRTimeline
Legacy Wealth Asset Management, LLC321$705K0.17%+813F-HRTimeline
Cresset Asset Management, LLC299$657K<0.01%+2013F-HRTimeline
Brown Miller Wealth Management, LLC298$656K0.19%013F-HRTimeline
ELEVATION POINT WEALTH PARTNERS, LLC297$653K0.02%+7413F-HRTimeline
Brooklyn Investment Group295$646K0.02%new13F-HRTimeline
Arax Advisory Partners275$605K0.02%-613F-HRTimeline
Essex Bankin group Essex Financial Services, Inc.275$604K0.13%013F-HRTimelineGroup
COMMONWEALTH EQUITY SERVICES, LLC274$602K<0.01%+313F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…260$571K<0.01%-4013F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\255$560K<0.01%+1813F-HRTimelineGroup
Vestcor Inc255$560K0.02%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd250$549K0.01%+2113F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD246$540K<0.01%+10813F-HRTimeline
Venturi Wealth Management, LLC243$534K0.02%+2213F-HRTimeline
Shotwell Rutter Baer Inc242$532K0.31%013F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC237$521K<0.01%-613F-HRTimelineGroup
WEDBUSH SECURITIES INC228$501K0.01%-113F-HRTimeline
OneAscent Financial Services LLCin group OneAscent Financial Services …228$501K0.03%new13F-HRTimelineGroup
Atria Investments, Inc226$497K0.01%+1713F-HRTimeline
Athena Investment Management224$492K0.26%-513F-HRTimeline