Robeco Institutional Asset Management B.V.

Position in WTM — White Mountains Insurance Group Ltd

CIK 1418773 ROTTERDAM, P7

Back to WTM Full portfolio

Position in WTM

as of Jun 30, 2026 · filed Jul 21, 2026 Compact

Position Value

$4,528,283

-$258,892 QoQ

Shares Held

2,184

+0.2% QoQ

Ownership

0.092%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

#13

of 133 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in WTM Over Time

Shares Held

Position Value (USD)

Position in Insurance - Property & Casualty

Financial Services · as of Jun 30, 2026

Robeco Institutional Asset Management B.V. holds $782,023,273 across 13 Insurance - Property & Casualty names. WTM ranks #8 (0.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	TRV	Travelers Companies, Inc.	992,821	$327,750,068
2	ALL	Allstate Corp	1,212,247	$288,442,051
3	CB	Chubb Ltd	313,876	$106,950,108
4	PGR	Progressive Corp/Oh/	79,149	$17,290,099
5	L	Loews Corp	137,596	$15,577,243
6	AIZ	Assurant, Inc.	25,726	$6,908,202
7	CINF	Cincinnati Financial Corp	29,826	$5,521,985
8	WTM	White Mountains Insurance Group Ltd This page	2,184	$4,528,283

All Filings in WTM

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26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$4,528,283	2,184	+0.2%	Shares	Defined	2026-07-21
2026-03-31	$4,787,175	2,179	+249.8%	Shares	Defined	2026-04-21
2025-12-31	$1,294,612	623	-96.4%	Shares	Defined	2026-01-23
2025-09-30	$28,815,333	17,239	-3.3%	Shares	Defined	2025-10-22
2025-06-30	$32,003,321	17,822	-7.0%	Shares	Defined	2025-07-18
2025-03-31	$36,886,966	19,154	-1.4%	Shares	Defined	2025-04-23
2024-12-31	$37,767,231	19,417	-4.4%	Shares	Defined	2025-01-23
2024-09-30	$34,459,999	20,316	-5.0%	Shares	Defined	2024-10-29
2024-06-30	$38,853,446	21,378	-27.8%	Shares	Defined	2024-07-23
2024-03-31	$53,152,548	29,623	-0.6%	Shares	Defined	2024-04-24
2023-12-31	$44,834,247	29,790	-6.6%	Shares	Defined	2024-02-14
2023-09-30	$47,730,456	31,912	+0.7%	Shares	Defined	2023-10-24
2023-06-30	$43,997,890	31,678	-1.5%	Shares	Defined	2023-07-24
2023-03-31	$44,309,720	32,167	+42.3%	Shares	Defined	2023-05-04
2022-12-31	$31,961,029	22,598	+128.9%	Shares	Defined	2023-02-07
2022-09-30	$12,866,019	9,874	-4.2%	Shares	Defined	2022-12-01
2022-06-30	$12,846,354	10,309	-0.4%	Shares	Defined	2022-12-01
2022-03-31	$11,763,492	10,353	-14.3%	Shares	Defined	2022-12-01
2021-12-31	$12,246,898	12,079	-33.3%	Shares	Defined	2022-12-01
2021-09-30	$19,372,776	18,112	0.0%	Shares	Defined	2022-12-01
2021-06-30	$20,793,119	18,112	-19.2%	Shares	Defined	2022-12-01
2021-03-31	$24,997,172	22,421	-16.2%	Shares	Defined	2022-12-01
2020-12-31	$26,780,663	26,763	-15.7%	Shares	Defined	2022-12-01
2020-09-30	$24,737,145	31,755	-16.9%	Shares	Defined	2021-01-19
2020-06-30	$33,936,437	38,218	-4.6%	Shares	Defined	2021-01-19
2020-03-31	$36,462,790	40,069	—	Shares	Defined	2021-01-19
No filing history on record for this holder in this stock.