Lockton vs 
Marsh: How Do They Compare for D&O Insurance?
Lockton designs D&O programs that may cover related entities beyond the company; Marsh describes a three-part policy and addresses public-company directors and officers.
Lockton puts insurance and claims counsel on your D&O broking team from the start; Marsh places D&O for public, private and nonprofit companies, with Marsh McLennan Agency serving middle-market clients. 1,2,3
What Are the Key Differences Between Lockton and Marsh D&O Insurance?
Claims Counsel From Day One vs a Middle-Market Channel
Lockton says its Professional & Executive Risk Claims team sits inside your broking team from the start, rather than as a separate profit center, and it designs programs that can extend to trustees, contractors, volunteers, spouses and estates. Marsh places D&O for public, private and nonprofit companies, and Marsh McLennan Agency handles middle-market clients, but its D&O pages describe no claims team. Choose Marsh McLennan Agency if you're a middle-market company that wants a large broker's reach; choose Lockton if you want claims counsel involved before anything goes wrong. 1 2 3
Emerging Claims Each Is Watching
Marsh warns that ESG scrutiny of emissions, labor practices, board diversity and executive pay can bring regulatory or litigation pressure, and that public companies mostly face securities suits while private companies and nonprofits more often face employment claims. Lockton points to AI-related litigation and event-driven claims. 2 1
What Should You Confirm in Lockton and Marsh D&O Insurance Quotes?
Lockton vs Marsh D&O Insurance Compared
Lockton vs Marsh: D&O Insurance: documented features by provider
| Criteria | Lockton Directors & Officers (D&O) Insurance Brokerage | Marsh Directors and Officers Liability (D&O) Insurance |
|---|---|---|
| Who It’s For | Lockton says D&O coverage it places can extend beyond directors and officers to trustees, employees, independent contractors, staff, committee members, volunteers, the corporate entity, majority-owned subsidiaries, spouses/domestic partners, and estates/heirs. 1Company-reported. D&O product page as read 2026-09-23. Describes who can typically be covered under a program Lockton structures, not a guarantee for any specific client. | Marsh says public company directors and officers typically face more securities-lawsuit exposure from shareholders and regulators, while private and non-profit organizations more often face employment-practices claims from customers, vendors or regulators; directors and officers of all organization types can face cyber-related liability exposure. 2Company-reported. Marsh D&O page, common risks FAQ. |
| Coverage Features | Lockton explains a traditional D&O program in three parts it says it can structure: Side A (direct coverage to individual directors/officers when the company can't indemnify them), Side B (reimbursing the company for indemnifying its D&Os), and Side C (entity coverage, generally limited to securities claims for public companies but broader for private and nonprofit organizations). 1Company-reported. D&O product page as read 2026-09-23. General educational description of program structure, not a specimen policy form. | Marsh says D&O insurance typically has three coverage sides: Side A protects directors' and officers' personal assets when the organization cannot or will not indemnify them; Side B reimburses the organization for indemnifying directors and officers; Side C offers balance-sheet protection when the entity itself is named, generally limited to securities claims for public companies. 2Company-reported. Marsh D&O page FAQ; illustrative policy structure, not a specific policy form. Marsh says ESG-related stakeholder scrutiny, covering areas such as carbon emissions, renewable-energy use, labor practices, board diversity and executive compensation, can add regulatory, legislative or litigation pressure on directors and officers beyond traditional D&O exposures. 2Company-reported. Marsh D&O page, What other risks do directors and officers face? section. |
| Role in This Line | Lockton designs and places D&O programs rather than underwriting them, saying effective coverage requires market intelligence, coverage-design precision and staying ahead of emerging risks like AI-related litigation and event-driven claims. 1Company-reported. D&O product page as read 2026-09-23. | Marsh's financial and professional liability practice places D&O insurance for public, private and non-profit companies; MMA also places D&O coverage within its executive and professional liability practice for middle-market clients. 2,3Company-reported. Marsh D&O page and MMA executive and professional liability page. |
