JANE STREET GROUP, LLC

Position in WTM — White Mountains Insurance Group Ltd

CIK 1595888 NEW YORK, NY

Position in WTM

as of Mar 31, 2026 · filed May 12, 2026 Compact

Position Value

$30,335,622

+$26,788,425 QoQ

Shares Held

13,808

+708.9% QoQ

Ownership

0.579%

of shares outstanding

% of Portfolio

0.04%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

22 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Financial Services · as of Mar 31, 2026

JANE STREET GROUP, LLC holds $408,241,536 across 32 Insurance - Property & Casualty names. WTM ranks #6 (7.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LMND	Lemonade, Inc.	1,218,215	$76,357,715
2	WRB	Berkley W R Corp	1,014,135	$67,216,866
3	MKL	Markel Group Inc.	34,881	$66,764,671
4	TRV	Travelers Companies, Inc.	114,872	$33,505,864
5	AFG	American Financial Group Inc	261,033	$33,336,523
6	WTM	White Mountains Insurance Group Ltd This page	13,808	$30,335,622
7	HCI	HCI Group, Inc.	118,220	$18,277,993
8	THG	Hanover Insurance Group, Inc.	67,758	$11,745,849

22 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$30,335,622	13,808	+708.9%	Shares	Defined	2026-05-12
2025-12-31	$3,547,197	1,707	-64.6%	Shares	Defined	2026-02-12
2025-09-30	$8,056,726	4,820	-20.6%	Shares	Defined	2025-11-14
2025-06-30	$10,901,815	6,071	+950.3%	Shares	Defined	2025-08-14
2025-03-31	$1,113,117	578	+101.4%	Shares	Defined	2025-05-19
2024-12-31	$558,232	287	-78.0%	Shares	Defined	2025-02-14
2024-09-30	$2,216,932	1,307	+41.0%	Shares	Defined	2024-11-15
2024-06-30	$1,684,775	927	+66.4%	Shares	Defined	2024-08-15
2024-03-31	$999,424	557	+131.1%	Shares	Defined	2024-05-16
2023-09-30	$360,460	241	-3.2%	Shares	Defined	2023-11-15
2023-06-30	$345,838	249	-64.6%	Shares	Defined	2023-08-14
2023-03-31	$969,752	704	-43.3%	Shares	Defined	2023-05-16
2022-12-31	$1,756,597	1,242	+323.9%	Shares	Defined	2023-02-15
2022-09-30	$381,784	293	-69.2%	Shares	Defined	2022-11-15
2022-06-30	$1,183,823	950	-6.3%	Shares	Defined	2022-08-16
2022-03-31	$1,152,147	1,014	-5.0%	Shares	Defined	2022-05-17
2021-09-30	$1,141,273	1,067	+400.9%	Shares	Defined	2021-11-16
2021-06-30	$244,530	213	-37.5%	Shares	Defined	2021-08-16
2020-12-31	$341,225	341	-82.9%	Shares	Defined	2021-02-17
2020-09-30	$1,554,884	1,996	+84.5%	Shares	Defined	2020-11-17
2020-06-30	$960,783	1,082	+46.0%	Shares	Defined	2020-08-17
2020-03-31	$674,310	741	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.