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Michael O'Reilly
Director/Board Member at
MARKEL GROUP INC.
Net worth: 7 M $ as of 2026-05-30
Profile
Michael O'Reilly is Chairman at Harbor Branch Oceanographic Institute Foundation, Inc. (FL), Lead Independent Director at Markel Group, Inc. since 2021, and President of Trade-Winds Environmental Restoration, Inc. since 1993.
Former roles include Chairman, President & Chief Executive Officer at Windswept Environmental Group, Inc. from 1996 to 2008; Vice Chairman at The Chubb Corp.
and Chubb Asset Managers, Inc. from 1969 to 2008; Chairman at Harbor Point Ltd. in 2010; Chairman at Alterra Capital Holdings Ltd. from 2010 to 2013; and Chief Operating Officer & Vice President at North Shore Environmental Solutions, Inc. Education includes undergraduate studies at New York University and an MBA from Pace University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
MARKEL GROUP INC. 0.03% | 2026-05-19 | 3,845 ( 0.03% ) | 7 M $ | 2026-05-30 |
Michael O'Reilly active positions
| Companies | Position | Start |
|---|---|---|
| MARKEL GROUP INC. | Director/Board Member | 2012-12-31 |
Trade-Winds Environmental Restoration, Inc. | President | 1992-12-31 |
Harbor Branch Oceanographic Institute Foundation, Inc. (FL)
 Harbor Branch Oceanographic Institute Foundation, Inc. (FL) Miscellaneous Commercial ServicesCommercial Services Conducts research on oceans | Chairman | - |
Former positions of Michael O'Reilly
| Companies | Position | End |
|---|---|---|
Alterra Capital Holdings Ltd.
 Alterra Capital Holdings Ltd. Multi-Line InsuranceFinance Provides insurance, reinsurance and specialty insurance products | President | 2010-05-24 |
Harbor Point Ltd.
 Harbor Point Ltd. Insurance Brokers/ServicesFinance Provides insurance and reinsurance services | Chairman | 2010-04-30 |
Chubb Asset Managers, Inc.
 Chubb Asset Managers, Inc. Investment ManagersFinance Chubb Asset Management invests in readily marketable fixed-income securities with intermediate maturities. The majority of these investments are made in US Treasury government agency and corporate issues. Most are rated AA or better by Moody's or Standard & Poor's. Of the tax-exempt bonds, practically all are rated A or better, with approximately half rated AAA. | Director of Finance/CFO | - |
| CHUBB CORP | Director of Finance/CFO | 2008-10-31 |
Windswept Environmental Group, Inc.
 Windswept Environmental Group, Inc. Engineering & ConstructionIndustrial Services Provides emergency response and disaster recovery services | Chief Executive Officer | 2008-11-23 |
Training of Michael O'Reilly
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
74
1st degree connections
11
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 11 |
|---|---|
The Chubb Corp.
 The Chubb Corp. Multi-Line InsuranceFinance Operates as a holding company for a family of property and casualty insurance companies | Finance |
Markel Group, Inc.
 Markel Group, Inc. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Finance |
Windswept Environmental Group, Inc.
Windswept Environmental Group, Inc. Engineering & ConstructionIndustrial Services Provides emergency response and disaster recovery services | Industrial Services |
Chubb Asset Managers, Inc.
Chubb Asset Managers, Inc. Investment ManagersFinance Chubb Asset Management invests in readily marketable fixed-income securities with intermediate maturities. The majority of these investments are made in US Treasury government agency and corporate issues. Most are rated AA or better by Moody's or Standard & Poor's. Of the tax-exempt bonds, practically all are rated A or better, with approximately half rated AAA. | Finance |
New York University
 New York University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Pace University
 Pace University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Harbor Point Ltd.
Harbor Point Ltd. Insurance Brokers/ServicesFinance Provides insurance and reinsurance services | Finance |
Trade-Winds Environmental Restoration, Inc. | |
North Shore Environmental Solutions, Inc. | |
Harbor Branch Oceanographic Institute Foundation, Inc. (FL)
Harbor Branch Oceanographic Institute Foundation, Inc. (FL) Miscellaneous Commercial ServicesCommercial Services Conducts research on oceans | Commercial Services |
Alterra Capital Holdings Ltd.
Alterra Capital Holdings Ltd. Multi-Line InsuranceFinance Provides insurance, reinsurance and specialty insurance products | Finance |
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