![Dennis Langwell](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Dennis Langwell
Director/Board Member at
SAFETY INSURANCE GROUP, INC.
Net worth: 832 171 $ as of 2026-06-29
Profile
Dennis James Langwell is currently Chairman at USS Constitution Museum Foundation, Inc. since 2023.
He serves as Independent Director at Liberty Mutual Agency Corp.
since 2012, at Safety Insurance Group, Inc. since 2023, and was Independent Director at James River Group Holdings, Inc. from 2023 to 2026.
He is Director at Companion Protect LLC, Chief Financial Officer at Helmsman Management Services LLC, and Trustee at Providence College since 2014.
Former roles include Director at Ohio Casualty Corp.
in 2007, Director at United Way of Massachusetts Bay & Merrimack Valley, Comptroller at Liberty Mutual Fire Insurance Co. in 2003, Chief Financial Officer & Executive Vice President at Liberty Mutual Holding Co., Inc. from 2003 to 2018, Executive Vice President & Chief Financial Officer at Liberty Mutual Insurance Co. (Investment Portfolio), and President-Global Risk Solutions at Liberty Mutual Group, Inc. from 2018 to 2021.
Education includes undergraduate studies at Providence College.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-15 | 9,083 ( 0.06% ) | 679 953 $ | 2026-06-29 | |
| 2026-04-23 | 34,595 ( 0.07% ) | 152 218 $ | 2026-06-29 |
Dennis Langwell active positions
| Companies | Position | Start |
|---|---|---|
| SAFETY INSURANCE GROUP, INC. | Director/Board Member | 2023-04-04 |
Helmsman Management Services LLC
 Helmsman Management Services LLC Insurance Brokers/ServicesFinance Provides risk management services | Director of Finance/CFO | - |
Liberty Mutual Agency Corp.
 Liberty Mutual Agency Corp. Insurance Brokers/ServicesFinance Provides property and casualty insurance products | Director/Board Member | 2010-05-11 |
USS Constitution Museum Foundation, Inc.
 USS Constitution Museum Foundation, Inc. Other Consumer ServicesConsumer Services The non-profit company is based in Charlestown, MA. USS Constitution Museum Foundation, Inc. operates the USS Constitution Museum, a nonprofit institution that focuses on maritime heritage, naval service, and the American experience through the history of the USS Constitution. The museum offers immersive exhibits, educational programs, events, a museum store, and online resources such as games, podcasts, lesson plans, and virtual tours. It provides family-friendly activities, special exhibits, community engagement initiatives, and supports model shipbuilders and researchers with technical resources and a maritime library. | Chairman | 2023-08-31 |
Providence College
 Providence College Other Consumer ServicesConsumer Services Functions as a College/University | Director/Board Member | 2014-05-31 |
Companion Protect LLC
 Companion Protect LLC Life/Health InsuranceFinance Provides pet insurance services | Director/Board Member | - |
Former positions of Dennis Langwell
| Companies | Position | End |
|---|---|---|
| JAMES RIVER GROUP HOLDINGS, INC. | Director/Board Member | 2026-06-15 |
Liberty Mutual Group, Inc.
 Liberty Mutual Group, Inc. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Director of Finance/CFO | 2017-12-31 |
Liberty Mutual Holding Co., Inc.
 Liberty Mutual Holding Co., Inc. Property/Casualty InsuranceFinance Operates as a holding company through subsidiaries provides property and causality insurance services | Director of Finance/CFO | 2017-12-31 |
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Training of Dennis Langwell
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
68
1st degree connections
13
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 13 |
|---|---|
Ohio Casualty Corp.
 Ohio Casualty Corp. Property/Casualty InsuranceFinance Operates as a holding company which provides casualty insurance | Finance |
Safety Insurance Group, Inc.
 Safety Insurance Group, Inc. Property/Casualty InsuranceFinance Provides private passenger automobile insurance services | Finance |
Liberty Mutual Agency Corp.
Liberty Mutual Agency Corp. Insurance Brokers/ServicesFinance Provides property and casualty insurance products | Finance |
Providence College
Providence College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Liberty Mutual Group, Inc.
Liberty Mutual Group, Inc. Property/Casualty InsuranceFinance Provides property and casualty insurance services | Finance |
Liberty Mutual Fire Insurance Co.
 Liberty Mutual Fire Insurance Co. Property/Casualty InsuranceFinance Property and Casualty Insurance | Finance |
Helmsman Management Services LLC
Helmsman Management Services LLC Insurance Brokers/ServicesFinance Provides risk management services | Finance |
Liberty Mutual Holding Co., Inc.
Liberty Mutual Holding Co., Inc. Property/Casualty InsuranceFinance Operates as a holding company through subsidiaries provides property and causality insurance services | Finance |
United Way of Massachusetts Bay & Merrimack Valley
 United Way of Massachusetts Bay & Merrimack Valley Services to the Health IndustryHealth Services Provides child and youth care services | Health Services |
James River Group Holdings Ltd.
 James River Group Holdings Ltd. Multi-Line InsuranceFinance Operates as a holding company which provides admitted insurance, excess and surplus lines & casualty reinsurance services | Finance |
USS Constitution Museum Foundation, Inc.
USS Constitution Museum Foundation, Inc. Other Consumer ServicesConsumer Services The non-profit company is based in Charlestown, MA. USS Constitution Museum Foundation, Inc. operates the USS Constitution Museum, a nonprofit institution that focuses on maritime heritage, naval service, and the American experience through the history of the USS Constitution. The museum offers immersive exhibits, educational programs, events, a museum store, and online resources such as games, podcasts, lesson plans, and virtual tours. It provides family-friendly activities, special exhibits, community engagement initiatives, and supports model shipbuilders and researchers with technical resources and a maritime library. | Consumer Services |
Liberty Mutual Insurance Co. (Investment Portfolio)
 Liberty Mutual Insurance Co. (Investment Portfolio) Investment ManagersFinance Liberty Mutual-IP’s portfolio is primarily invested in bonds, cash and short-term investments. Investments are heavily concentrated in fixed-income, investment-grade securities. | Finance |
Companion Protect LLC
Companion Protect LLC Life/Health InsuranceFinance Provides pet insurance services | Finance |
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