What Is Marsh McLennan Agency?
Marsh McLennan Agency provides business insurance and employee health and benefits, alongside retirement, wealth, and private-client services across the United States and Canada. Its US small-business page lists six common coverage types and directs buyers to request a personalized quote by phone; the insurer and terms for a specific placement must be confirmed in the proposal. 1,2
What Is Nationwide?
Nationwide’s commercial catalogue includes common small-business policies and separate specialty products. A catalogue listing does not establish eligibility or policy terms; confirm the issuing company and coverage for your state and business. 4,5,6
What Is Directors and Officers Insurance?
D&O insurance can help pay covered defense costs and losses from claims against company leaders over management decisions. If your organization has a board or executives, check whether the company itself is insured and whether legal bills reduce the limit. 8,9,10
What Are the Key Differences Between Marsh McLennan Agency and Nationwide D&O Insurance?
Alleged management decisions and defense costs
Nationwide describes D&O for claims tied to alleged decisions or wrongful acts by company directors and officers, subject to policy terms. Marsh McLennan Agency’s overview also centers on alleged wrongful acts, with defense costs specifically named for civil and criminal actions. The overlap is useful: both descriptions start with management conduct, while MMA’s claim identifies cost categories. Ask both providers to show how the quoted form connects the alleged act, covered insureds and defense expense. 7 3
Testing a real claim scenario
For a claim alleging that a board decision caused investor loss, put Nationwide’s management-decision description beside MMA’s stated defense-cost feature. Ask each provider to identify the trigger, insured persons, retention and any shared-limit treatment in the actual wording. Nationwide frames the covered subject generally; MMA names defense costs for wrongful-act claims. The issued form, rather than either marketing summary, determines how that scenario is treated. 7 3
What Should You Confirm in Marsh McLennan Agency and Nationwide D&O Insurance Quotes?
Marsh McLennan Agency and Nationwide Review Scores for 2026
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
Marsh McLennan Agency Review Score
Review Score
2 rated sources
There are almost no public customer reviews of Marsh McLennan Agency (MMA). Trustpilot shows 3.2 out of 5, but from a single review, and BBB shows an A grade with four complaints closed in three years.[8][9][1]
Read Marsh McLennan Agency reviewsNationwide Review Score
Review Score
4 rated sources
Experts like Nationwide more than customers do. NerdWallet gives it 4.5 out of 5 for business insurance, while small-business customers on ConsumerAffairs give it 2.5 out of 5 from 19 reviews.[1][10]
Read Nationwide reviewsMarsh McLennan Agency vs Nationwide D&O Insurance Compared
Marsh McLennan Agency vs Nationwide: D&O Insurance: documented features by provider
| Criteria | Marsh McLennan Agency directors officers (official overview) | Nationwide directors officers (official overview) |
|---|---|---|
| Role in This Line | Marsh McLennan Agency describes arranging directors officers for the audience stated on the cited product page. 3Company-reported. directors officers marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. | Nationwide describes offering directors officers for the audience stated on the cited product page. 7Company-reported. directors officers marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
| Who It’s For | Corporate executives, board members, and their organizations, as described by the source. 3Company-reported. directors officers marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. | Businesses and directors/officers described by Nationwide; page does not establish universal limits or terms. 7Company-reported. directors officers marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
| Coverage Features | The cited product page describes D&O for alleged wrongful acts by directors or officers, including described defense costs for civil and criminal actions and investigations. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. 3Company-reported. directors officers marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. | The cited product page describes D&O insurance for claims tied to alleged decisions or wrongful acts by company directors and officers, subject to policy terms. Marketing description only; actual coverage, exclusions, conditions, limits, and availability depend on the issued policy and jurisdiction. 7Company-reported. directors officers marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
| Limits and Retentions | The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. 3Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred. | The cited overview does not set a universal limit or retention for this line. Ask for the proposed policy form, limits, retentions, exclusions, and conditions in the quote. 7Not publicly disclosed. Only the cited marketing page was reviewed for published limit and retention information; no policy-form entitlement is inferred. |
| How to Apply | The page invites organizations to contact a Marsh McLennan Agency adviser or specialist to discuss placement. The page does not establish a quote, bind, or coverage-effective timeline. 3Company-reported. directors officers marketed by marsh-mclennan-agency; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. | The page directs prospective customers to contact an agent or request a quote. The page does not establish a quote, bind, or coverage-effective timeline. 7Company-reported. directors officers marketed by nationwide; scope is limited to the cited official product overview and described audience. This is not a policy form or a universal eligibility statement. |
Related Pages for Marsh McLennan Agency vs Nationwide D&O Insurance
D&O Insurance Pages for Marsh McLennan Agency and Nationwide
Other Coverage Lines Compared for Marsh McLennan Agency vs Nationwide
Other D&O Insurance Provider Comparisons
Sources for Marsh McLennan Agency vs Nationwide D&O Insurance
Sources About Marsh McLennan Agency
- Who We Are. Marsh McLennan Agency; Lines 193-195: ‘a business of Marsh’ and company-listed service lines across US and Canada. This does not establish the legal entity for an account, corporate ownership chart, or insurer role. Accessed 2026-09-29.
- Small Business Insurance Solutions. Marsh McLennan Agency; Lines 205-207: small-business audience and call invitation; lines 224-249 list six coverage categories and short descriptions; line 264 is an embedded form whose function is not stated. No form submitted. Accessed 2026-09-29.
- Executive and Professional Liability | MMA. Marsh McLennan Agency; Directors and Officers section; claims for alleged wrongful acts and defense costs. Accessed 2026-09-30.
Sources About Nationwide
- Small Business Insurance. Nationwide; Small business products and solutions, lines 185–214: BOP, workers’ compensation, commercial auto, umbrella, EPLI, cyber and surety; purchase guidance lines 235–247. Accessed 2026-09-29.
- Small Business Insurance Solutions for Agents. Nationwide; Specialized small commercial solutions: BOP, auto, workers’ compensation, cyber, EPLI, umbrella, inland marine and professional liability; page states appetite varies by state, lines 129–163, 191–193. Accessed 2026-09-29.
- Terms and Conditions for Nationwide.com. Nationwide; P&C products not offered by all companies/states; policy/declarations control; NMI and affiliates may underwrite; each underwriter responsible for own products, lines 358–368 and 391–394. Accessed 2026-09-29.
- Directors and Officers Liability. Nationwide; D&O page; management-liability product and covered exposures. Accessed 2026-09-30.
Sources for the D&O Insurance Guide
- Glossary of Business Insurance Terms. The Hartford; Directors and Officers Liability Insurance; Errors and Omissions Insurance; Employment Practices Liability Insurance. Accessed 2026-09-16.
- The Chubb Primary Directors & Officers and Entity Securities Liability Insurance. Chubb Group of Insurance Companies; hosted by eperils; I.A–C p.1; I.C p.1; I and III.A–B pp.1–2; VI Reporting pp.3–4. Accessed 2026-09-16.
- Private Company Directors and Officers Liability Coverage. Travelers Casualty and Surety Company of America; I.A–C p.1; I.C p.1; Header p.1 and VI.A pp.6–7. Accessed 2026-09-16.
