# Marsh & Mclennan Companies Moat

Status: published. Policy: company-analysis-1.

Marsh has a narrow moat supported by specialized expertise, proprietary data and tools, insurance-market relationships and demonstrated renewal demand. Growth despite declining insurance premium rates supports the value of its services, but does not establish control over its own pricing. Talent mobility, client insourcing and digital competition constrain durability. First-half 2026 growth remained positive, while reinsurance weakness and a realized litigation charge show uneven resilience.

## intangible_assets

Specialized advisory expertise, proprietary analytical tools and established market relationships provide differentiated services. Higher new-business and renewal revenue in 2025, followed by underlying growth in the first half of 2026, provide operating support for a current advantage. Evidence is strongest for differentiated advice and relationships; substantial contractual switching costs are not established.

Durability: Specialized capabilities and market relationships appear across multiple annual disclosures, supporting some persistence. Continued demand supports a narrow moat, but neither exclusive capabilities nor exceptional long-term protection is demonstrated.

Risks: Client relationships depend on mobile employees. Clients can internalize services or terminate engagements without penalty. AI entrants could reduce differentiation. Guy Carpenter's second-quarter 2026 underlying revenue decline is realized weakness, while broader digital disruption remains a prospective risk. Professional-liability exposure can damage economics and trust.

Invalidation: The thesis would weaken materially if renewal revenue declined persistently alongside underlying contraction across the principal businesses, if employee departures caused documented client losses, or if clients replaced proprietary advice and analytics with internal or competing services at materially lower fees. Persistent fee concessions without stable repeat demand would invalidate the claimed differentiation.

Competitors: Not established
- [https://www.sec.gov/Archives/edgar/data/62709/000006270926000022/mrsh-20251231.htm](https://www.sec.gov/Archives/edgar/data/62709/000006270926000022/mrsh-20251231.htm) · 2026-02-09
- [https://www.sec.gov/Archives/edgar/data/62709/000006270926000195/mrsh-20260630.htm](https://www.sec.gov/Archives/edgar/data/62709/000006270926000195/mrsh-20260630.htm) · 2026-07-21
- [https://www.sec.gov/Archives/edgar/data/62709/000119312526133303/d94896ddef14a.htm](https://www.sec.gov/Archives/edgar/data/62709/000119312526133303/d94896ddef14a.htm) · 2026-03-31
- [https://www.sec.gov/Archives/edgar/data/62709/000006270925000015/mmc-20241231.htm](https://www.sec.gov/Archives/edgar/data/62709/000006270925000015/mmc-20241231.htm) · 2025-02-10
- [https://www.sec.gov/Archives/edgar/data/62709/000006270924000016/mmc-20231231.htm](https://www.sec.gov/Archives/edgar/data/62709/000006270924000016/mmc-20231231.htm) · 2024-02-12
- [https://www.sec.gov/Archives/edgar/data/62709/000006270926000098/mrsh-20260331.htm](https://www.sec.gov/Archives/edgar/data/62709/000006270926000098/mrsh-20260331.htm) · 2026-04-16

[JSON](https://beanvest.com/stock/mrsh/moat.json)