Ken Griffin White Mountains Insurance Group LTD Transaction History

Citadel Advisors LLC

$618 Billion
Q3 2025

A detailed history of Ken Griffin (Citadel Advisors LLC) transactions in White Mountains Insurance Group LTD stock. As of the latest transaction made, Citadel Advisors LLC holds 281 shares of WTM stock, worth $540,832. This represents 0.0% of its overall portfolio holdings.

Number of Shares

281

Previous 1,171 76.0%

Holding current value

$540,832

Previous $2.1 Million 77.69%

% of portfolio

0.0%

Previous 0.0%

23 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 14, 2025	SELL	$1671.52 - $1869.81 $1.49 Million - $1.66 Million	-890 Reduced 76.0%	281 $469,000
Q2 2025 Aug 14, 2025	SELL	$1699.35 - $1901.99 $8,496 - $9,509	-5 Reduced 0.43%	1,171 $2.1 Million
Q1 2025 May 15, 2025	BUY	$1818.58 - $1983.07 $2.14 Million - $2.33 Million	1,176 New	1,176 $2.26 Million
Q4 2023 Feb 14, 2024	BUY	$1425.4 - $1551.29 $471,807 - $513,476	331 New	331 $498,000
Q1 2023 May 15, 2023	BUY	$1322.18 - $1551.67 $914,948 - $1.07 Million	692 New	692 $953,000

Q3 2022 Nov 14, 2022	SELL	$1176.95 - $1393.48 $2.65 Million - $3.14 Million	-2,253 Reduced 57.24%	1,683 $2.19 Million
Q2 2022 Aug 15, 2022	SELL	$1041.57 - $1282.66 $2.88 Million - $3.55 Million	-2,766 Reduced 41.27%	3,936 $4.91 Million
Q1 2022 May 16, 2022	SELL	$1006.37 - $1136.24 $1.68 Million - $1.9 Million	-1,673 Reduced 19.98%	6,702 $7.62 Million
Q4 2021 Feb 14, 2022	SELL	$986.9 - $1127.1 $50,331 - $57,482	-51 Reduced 0.61%	8,375 $8.49 Million
Q3 2021 Nov 15, 2021	SELL	$1059.17 - $1174.26 $518,993 - $575,387	-490 Reduced 5.5%	8,426 $9.01 Million
Q2 2021 Aug 16, 2021	SELL	$1110.64 - $1237.15 $3.81 Million - $4.24 Million	-3,428 Reduced 27.77%	8,916 $10.2 Million
Q1 2021 May 17, 2021	BUY	$1010.0 - $1267.52 $5.78 Million - $7.26 Million	5,727 Added 86.55%	12,344 $13.8 Million
Q4 2020 Feb 16, 2021	SELL	$785.87 - $1008.33 $4.21 Million - $5.4 Million	-5,354 Reduced 44.72%	6,617 $6.62 Million
Q3 2020 Nov 16, 2020	BUY	$757.0 - $955.48 $9.06 Million - $11.4 Million	11,971 New	11,971 $9.33 Million
Q2 2020 Aug 14, 2020	SELL	$825.09 - $973.0 $3.83 Million - $4.51 Million	-4,639 Closed	0 $0
Q1 2020 May 15, 2020	SELL	$696.04 - $1164.52 $1.94 Million - $3.24 Million	-2,782 Reduced 37.49%	4,639 $4.22 Million
Q4 2019 Feb 14, 2020	SELL	$1058.42 - $1129.11 $4.12 Million - $4.4 Million	-3,893 Reduced 34.41%	7,421 $8.28 Million
Q3 2019 Nov 14, 2019	BUY	$1036.45 - $1093.91 $5.9 Million - $6.23 Million	5,695 Added 101.35%	11,314 $12.2 Million
Q2 2019 Aug 14, 2019	BUY	$911.09 - $1038.2 $3.59 Million - $4.1 Million	3,945 Added 235.66%	5,619 $5.74 Million
Q1 2019 May 15, 2019	BUY	$850.75 - $954.48 $869,466 - $975,478	1,022 Added 156.75%	1,674 $0
Q4 2018 Feb 14, 2019	SELL	$834.13 - $933.13 $2.97 Million - $3.32 Million	-3,555 Reduced 84.5%	652 $559,000
Q1 2018 May 11, 2018	BUY	$789.05 - $853.12 $1.13 Million - $1.22 Million	1,429 Added 51.44%	4,207 $3.46 Million
Q4 2017 Feb 09, 2018	BUY	$844.0 - $895.9 $2.34 Million - $2.49 Million	2,778	2,778 $2.37 Million

Others Institutions Holding WTM

# of Institutions

379

Shares Held

2.55M

Call Options Held

Put Options Held

View Full List

About WHITE MOUNTAINS INSURANCE GROUP LTD

Ticker WTM
Exchange NYSE
Sector Financial Services
Industry Insurance—Property & Casualty
Shares Outstandng 2,576,230
Market Cap $4.96B
Description
White Mountains Insurance Group, Ltd., through its subsidiaries, provides insurance and other financial services in the United States. The company operates through five segments: HG Global/BAM, Ark, NSM, Kudu, and Other Operations. The HG Global/BAM segment provides insurance on municipal bonds issued to finance public purposes, such as schools,...

More about WTM

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