Reid Campbell

Director/Board Member at WHITE MOUNTAINS INSURANCE GROUP, LTD.

Net worth: 22 M $ as of 31/07/2026

58 year

Finance

Commercial Services

Profile

Reid T.
Campbell is currently a Director at Build America Mutual Assurance Co., Guilford Holdings, Inc., Ark Insurance Holdings Ltd., and White Mountains Insurance Group Ltd. Former positions include Director at Intact Insurance Group USA Holdings, Inc. from 2006 to 2017, Director & Managing Director at White Mountains Capital LLC, Principal at KPMG LLP, and President at White Mountains Advisors LLC.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
WHITE MOUNTAINS INSURANCE GROUP LTD 0.43%	21/05/2026	10,694 ( 0.43% )	22 M $	31/07/2026

Reid Campbell active positions

Companies	Position	Start
WHITE MOUNTAINS INSURANCE GROUP, LTD.	Director/Board Member	22/02/2024
Build America Mutual Assurance Co. Build America Mutual Assurance Co. Financial ConglomeratesFinance Operates as a mutual municipal bond insurance company	Director/Board Member	-
Guilford Holdings, Inc. Guilford Holdings, Inc. Financial ConglomeratesFinance Functions as an investment holding company	Director/Board Member	-
Ark Insurance Holdings Ltd. Ark Insurance Holdings Ltd. Specialty InsuranceFinance Provides underwriting services for reinsurance and insurance businesses	Director/Board Member	-

All active positions of Reid Campbell

Former positions of Reid Campbell

Companies	Position	End
ONEBEACON INSURANCE GROUP, LTD.	Director/Board Member	28/09/2017
White Mountains Advisors LLC White Mountains Advisors LLC Investment ManagersFinance WMA’s investment approach generally places emphasis on maximizing long-term total returns (after-tax) while taking prudent levels of risk and maintaining a diversified portfolio. The firm manages a broad array security types in the following categories: debt securities, equity securities, alternative investments, cash or cash equivalents and derivatives. Their investments in equity securities include ETFs, common stock, preferred stock, convertible preferred stock and warrants. Investments in debt securities include debt issued by (1) domestic and foreign corporations (public and private), governments, government agencies, government sponsored entities, and supranational entities; (2) mortgage-backed securities, including collateralized mortgage obligations, whole loans, and agency pass-through securities; and (3) asset backed securities, including securities backed by consumer debt, loans/leases and similar economic interests, loan participations and convertible bonds.	President	-
KPMG LLP KPMG LLP Miscellaneous Commercial ServicesCommercial Services Provides auditing, tax and advisory services	Corporate Officer/Principal	-
White Mountains Capital LLC White Mountains Capital LLC Property/Casualty InsuranceFinance Provides property and casualty insurance services	Director/Board Member	-

See the detail of Reid Campbell's experience

Experiences
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Private companies

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Linked companies

Private companies	8
White Mountains Insurance Group Ltd. White Mountains Insurance Group Ltd. Multi-Line InsuranceFinance Provides property and casualty insurance services	Finance
Intact Insurance Group USA Holdings, Inc. Intact Insurance Group USA Holdings, Inc. Insurance Brokers/ServicesFinance Provides insurance services	Finance
KPMG LLP KPMG LLP Miscellaneous Commercial ServicesCommercial Services Provides auditing, tax and advisory services	Commercial Services
White Mountains Advisors LLC White Mountains Advisors LLC Investment ManagersFinance WMA’s investment approach generally places emphasis on maximizing long-term total returns (after-tax) while taking prudent levels of risk and maintaining a diversified portfolio. The firm manages a broad array security types in the following categories: debt securities, equity securities, alternative investments, cash or cash equivalents and derivatives. Their investments in equity securities include ETFs, common stock, preferred stock, convertible preferred stock and warrants. Investments in debt securities include debt issued by (1) domestic and foreign corporations (public and private), governments, government agencies, government sponsored entities, and supranational entities; (2) mortgage-backed securities, including collateralized mortgage obligations, whole loans, and agency pass-through securities; and (3) asset backed securities, including securities backed by consumer debt, loans/leases and similar economic interests, loan participations and convertible bonds.	Finance
White Mountains Capital LLC White Mountains Capital LLC Property/Casualty InsuranceFinance Provides property and casualty insurance services	Finance
Build America Mutual Assurance Co. Build America Mutual Assurance Co. Financial ConglomeratesFinance Operates as a mutual municipal bond insurance company	Finance
Guilford Holdings, Inc. Guilford Holdings, Inc. Financial ConglomeratesFinance Functions as an investment holding company	Finance
Ark Insurance Holdings Ltd. Ark Insurance Holdings Ltd. Specialty InsuranceFinance Provides underwriting services for reinsurance and insurance businesses	Finance