WTM

WHITE MOUNTAINS INSURANCE GROUP LTD

Fire, Marine & Casualty InsuranceNYSELarge accelerated filer

Total Trades

Buys

Sells

Largest Trade

N/A

Insiders

Institutional Funds

296

Inst. Value

$1M+

Activist Filings

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
CAMPBELL REID TARLTON	Director	SELL	N/A	5K	—	Dec 22, 2025
Rountree George Manning	CEO	SELL	$1M+	5K	$2050.00	Dec 22, 2025
Gelston Philip A	Director	SELL	$100K–$500K	165	$2048.51	Dec 17, 2025
Hicks Weston M	Director	BUY	$1M+	1K	$1480.56	Nov 20, 2023
Hildreth Michaela	MD & Chief Account…	SELL	$100K–$500K	100	$1371.84	Dec 27, 2022
Carlson Peter M	Director	SELL	$100K–$500K	200	$1400.00	Sep 22, 2022
DAVIS MORGAN W	Director	SELL	$1M+	945	$1400.00	Sep 22, 2022
Hildreth Michaela	MD & Chief Account…	SELL	$100K–$500K	100	$1270.94	Jun 1, 2022

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13F filings as of Dec 31, 2025 · 296 funds holding

Fund	Shares	Value	Type
DIMENSIONAL FUND ADVISORS LP	150K	$1M+	SH
Neuberger Berman Group LLC	128K	$1M+	SH
River Road Asset Management, LLC	121K	$1M+	SH
FULLER & THALER ASSET MANAGEMENT, INC.	108K	$1M+	SH
FULLER & THALER ASSET MANAGEMENT, INC.	108K	$1M+	SH
COOKE & BIELER LP	107K	$1M+	SH
FIDUCIARY MANAGEMENT INC /WI/	90K	$1M+	SH
Wallace Capital Management Inc.	80K	$1M+	SH
STATE STREET CORP	51K	$1M+	SH
REINHART PARTNERS, LLC.	44K	$1M+	SH
GEODE CAPITAL MANAGEMENT, LLC	35K	$1M+	SH
LORD, ABBETT & CO. LLC	34K	$1M+	SH
NORGES BANK	32K	$1M+	SH
Boston Partners	30K	$1M+	SH
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	23K	$1M+	SH
Mraz, Amerine & Associates, Inc.	23K	$1M+	SH
GENDELL JEFFREY L	21K	$1M+	SH
ENVESTNET ASSET MANAGEMENT INC	16K	$1M+	SH
HORIZON KINETICS ASSET MANAGEMENT LLC	13K	$1M+	SH
RAYMOND JAMES FINANCIAL INC	12K	$1M+	SH