Institutional shares held 2.58 Million
0 calls
0 puts
Total value of holdings $4.51B
$0 calls
$0 puts
Market Cap $4.53B
2,576,230 Shares Out.
Institutional ownership 100.33%
# of Institutions 348


Latest Institutional Activity in WTM

Top Purchases

Q1 2025
Reinhart Partners, Inc. Shares Held: 42.5K ($74.7M)
Q1 2025
Allspring Global Investments Holdings, LLC Shares Held: 24.9K ($43.7M)
Q1 2025
Wcm Investment Management, LLC Shares Held: 13.2K ($23.3M)
Q1 2025
Harbor Capital Advisors, Inc. Shares Held: 3.06K ($5.38M)
Q1 2025
Farther Finance Advisors, LLC Shares Held: 392 ($689K)

Top Sells

Q1 2025
Gamma Investing LLC Shares Held: 76 ($134K)
Q1 2025
Kbc Group Nv Shares Held: 125 ($220K)
Q1 2025
Perpetual LTD Shares Held: 7.73K ($13.6M)
Q1 2025
Sg Americas Securities, LLC Shares Held: 689 ($1.21M)
Q1 2025
Robeco Institutional Asset Management B.V. Shares Held: 19.2K ($33.7M)

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
View All Transactions

Last 12 Months Summary

Buy / Acquisition
7.55K Shares
From 14 Insiders
Grant, award, or other acquisition 7.55K shares
Sell / Disposition
2.38K Shares
From 5 Insiders
Payment of exercise price or tax liability 2.31K shares
Bona fide gift 75 shares

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P - Open market or private purchase×
S - Open market or private sale×
V - Transaction voluntarily reported earlier than required×
A - Grant, award, or other acquisition×
D - Sale (or disposition) back to the issuer×
F - Payment of exercise price or tax liability×
I - Discretionary transaction×
M - Exercise of conversion of derivative security×
C - Conversion of derivative security×
E - Expiration of short derivative position×
H - Expiration (or cancellation) of long derivative position with value received×
O - Exercise of out-of-the-money derivative securities×
X - Exercise of in-the-money or at-the-money derivatives securities×
G - Bona fide gift×
L - Small Acquisition×
W - Acquisition or disposition by will or laws×
Z - Deposit into or withdrawal from voting trust×
J - Other acquisition or disposition×
K - Transaction in equity swap or similar instrument×
U - Disposition due to a tender of shares in a change of control transaction×
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