White Mountains Insurance Group Ltd

Institutional holders · 13F as of Mar 31, 2026

Holder	Value	Shares	% of shares
RHUMBLINE ADVISERS	$9.08M	4,132	0.17%
MARSHALL WACE, LLP	$8.52M	3,878	0.16%
DARK FOREST CAPITAL MANAGEMENT LP	$7.51M	3,615	0.15%
Cerity Partners LLC	$7.36M	3,543	0.15%
Nuveen, LLC	$7.22M	3,475	0.15%
Creative Planning	$7.10M	3,415	0.14%
FIRST TRUST ADVISORS LP	$6.72M	3,058	0.13%
Brandywine Global Investment Management, LLC	$6.70M	3,226	0.14%
LEE DANNER & BASS INC	$6.45M	3,103	0.13%
AMERIPRISE FINANCIAL INC	$6.34M	3,053	0.13%
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	$6.34M	2,887	0.12%
Legal & General Group Plc	$6.31M	3,037	0.13%
Invesco Ltd.	$6.22M	2,995	0.13%
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	$5.80M	2,792	0.12%
Renaissance Technologies LLC	$5.74M	2,611	0.11%
Triad Investment Management	$5.29M	2,548	0.11%
NEW YORK STATE COMMON RETIREMENT FUND	$5.22M	2,513	0.11%
DAVENPORT & Co LLC	$4.41M	2,123	0.09%
Arrowstreet Capital, Limited Partnership	$4.20M	1,913	0.08%
Forum Financial Management, LP	$4.19M	2,016	0.08%
PARSONS CAPITAL MANAGEMENT INC/RI	$4.15M	1,888	0.08%
CITIGROUP INC	$3.84M	1,849	0.08%
JPMORGAN CHASE & CO	$3.75M	1,806	0.08%
AGF MANAGEMENT LTD	$3.74M	1,703	0.07%
Atlantic Union Bankshares Corp	$3.67M	1,765	0.07%
MML INVESTORS SERVICES, LLC	$3.61M	1,741	0.07%
JANE STREET GROUP, LLC	$3.55M	1,707	0.07%
Regency Capital Management Inc.\DE	$3.40M	1,635	0.07%
OPPENHEIMER ASSET MANAGEMENT INC.	$3.25M	1,480	0.06%
Focus Partners Wealth	$3.10M	1,610	0.07%
HighTower Advisors, LLC	$3.01M	1,447	0.06%
LPL Financial LLC	$2.73M	1,318	0.06%
STIFEL FINANCIAL CORP	$2.73M	1,312	0.05%
Royal Bank of Canada	$2.63M	1,195	0.05%
1834 INVESTMENT ADVISORS CO	$2.58M	1,176	0.05%
Citadel Advisors LLC	$2.48M	1,193	0.05%
JANUS HENDERSON GROUP PLC	$2.46M	1,123	0.05%
Aquatic Capital Management LLC	$2.45M	1,180	0.05%
PECAUT & CO.	$2.43M	1,167	0.05%
State of New Jersey Common Pension Fund D	$2.36M	1,135	0.05%
LEUTHOLD GROUP, LLC	$2.31M	1,052	0.04%
Autumn Glory Partners, LLC	$2.24M	1,080	0.05%
Police & Firemen's Retirement System of New Jersey	$2.22M	1,070	0.04%
Holocene Advisors, LP	$2.07M	998	0.04%
TD ASSET MANAGEMENT INC	$2.05M	932	0.04%
BRAVE ASSET MANAGEMENT INC	$2.03M	924	0.04%
Zurcher Kantonalbank (Zurich Cantonalbank)	$2.01M	913	0.04%
AllianceBernstein L.P.	$1.98M	953	0.04%
FMR LLC	$1.95M	939	0.04%
O'SHAUGHNESSY ASSET MANAGEMENT, LLC	$1.94M	934	0.04%