$MRSH

Marsh McLennan (MRSH) vs Aon (AON): Which Insurance Broker is a Better Buy?

Marsh McLennan (MRSH) and Aon (AON) are insurance brokers with different recent performances. MRSH closed at $177.01, up 2% in six months, while AON closed at $274.71, down 15.6%. MRSH grew revenue 6.2% in the latest quarter, while AON grew 2.2% and saw earnings fall 4.8%. MRSH trades at 14.97x next year's earnings, while AON is cheaper at 13.48x. Both have high operating margins and strong client relationships.

Original reporting
Published Oct 14, 2026, 6:38 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Oct 14, 2026, 6:44 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
Marsh McLennan (MRSH) vs Aon (AON): Which Insurance Broker is a Better Buy? — source image
Decision brief

The 30-second read

$MRSHBullishLow
01

Why it matters

Marsh's faster growth and cash generation may attract investors, while Aon's slower performance could lead to relative underperformance.

02

Market read

Provides a comparative view that may influence relative positioning of MRSH and AON in portfolios.

03

What to watch

Potential impact of underwriting cycles and macro‑insurance loss trends not fully addressed.

Relevance 4/10Novelty 2/10Timing: none

Background

The article compares two major U.S. insurance brokers, Marsh & McLennan (MRSH) and Aon (AON), focusing on recent growth, cash conversion, and valuation multiples.

Company-level read

Ticker impact

$MRSHBullishMedium confidence
Context

Marsh & McLennan reported 6.2% revenue growth in the latest quarter, outpacing Aon and indicating compounding earnings.

Expected impact

likely upward pressure as investors favor faster growth and higher cash flow conversion

Evidence & confidence

Revenue growth and cash generation are better than peers, supporting a relative buy case.

$AONBearishMedium confidence
Context

Aon posted only 2.2% revenue growth and a 4.8% earnings decline, making it slower than Marsh.

Expected impact

potential downside pressure as investors discount slower performance

Evidence & confidence

Falling earnings and weak revenue growth reduce relative attractiveness versus Marsh.

Market effects

Highlights divergence within insurance brokerage sector, may shift relative valuations.

U.S. insurance brokerage stocks could see re‑rating based on growth differentials.

Limited to North American insurers; no broader macro impact.

Counterpoint

Aon's lower valuation could still be justified if premium softening continues, making the discount appropriate.

Key entities

  • Marsh & McLennan Companies, Inc.

    U.S. insurance brokerage with recent 6.2% revenue growth.

  • Aon plc

    U.S. insurance brokerage with 2.2% revenue growth and earnings decline.

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