Institutional shares held 2.53 Million
0 calls
0 puts
Total value of holdings $4.88B
$0 calls
$0 puts
Market Cap $4.96B
2,576,230 Shares Out.
Institutional ownership 98.4%
# of Institutions 380


Latest Institutional Activity in WTM

Top Purchases

Q4 2025
Triad Investment Management Shares Held: 2.55K ($4.9M)
Q4 2025
Perigon Wealth Management, LLC Shares Held: 102 ($196K)
Q4 2025
Baldwin Brothers LLC Shares Held: 100 ($192K)
Q4 2025
Farther Finance Advisors, LLC Shares Held: 570 ($1.1M)
Q4 2025
Eagle Bay Advisors LLC Shares Held: 91 ($175K)

Top Sells

Q4 2025
Robeco Institutional Asset Management B.V. Shares Held: 623 ($1.2M)
Q4 2025
Allspring Global Investments Holdings, LLC Shares Held: 20.2K ($38.9M)
Q4 2025
Hengehold Capital Management LLC Shares Held: 227 ($437K)
Q4 2025
Oak Thistle LLC Shares Held: 530 ($1.02M)
Q4 2025
Sg Americas Securities, LLC Shares Held: 66 ($127K)

About WTM

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, utilities, and transportation facilities, as well as reinsurance protection services. The Ark segment writes a portfolio of reinsurance and insurance, including property, marine and energy, accident and health, casualty, and specialty products. The NSM segment operates as a managing general agent and program administrator for specialty property and casualty insurance to various sectors comprising specialty transportation, real estate, social services, and pet. The Kudu segment provides capital solutions to boutique asset and wealth managers for generational ownership transfers, management buyouts, acquisitions and growth finances, and legacy partner liquidity, as well as strategic assistance to investees. The Other Operations segment offers insurance solutions to travel industry through broker channel and on a direct-to-consumer basis; and manages separate accounts and pooled investment vehicles for insurance-linked securities sectors, including catastrophe bonds, collateralized reinsurance investments, and industry loss warranties of third-party clients. White Mountains Insurance Group, Ltd. was incorporated in 1980 and is headquartered in Hamilton, Bermuda.


Insider Transactions at WTM

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
6.41K Shares
From 14 Insiders
Grant, award, or other acquisition 6.41K shares
Sell / Disposition
11.5K Shares
From 10 Insiders
Bona fide gift 114 shares
Open market or private sale 10.2K shares
Payment of exercise price or tax liability 1.23K shares

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