Insurance Brokers
Stocks Ranked by
Market Capitalization
Insurance Brokers Stocks at a Glance
Insurance brokers arrange coverage between clients and carriers, earning commissions and fees without underwriting risk. Capital-light and cash-generative, they compound through premium-rate cycles and acquisitions in a fragmented market.
There are 24 Insurance Brokers industry stocks tracked by Wall St. Rank, worth a combined $308B.
The largest by market cap are Marsh (MRSH) at $85.5B, Aon (AON) at $65.7B and Arthur J. Gallagher & Co (AJG) at $64.2B.
Among institutional investors, Arthur J. Gallagher & Co (AJG) drew the most net new fund positions in Q2 2026: 163 funds opened new positions, taking total fund holders up 42 (3.4%) quarter-over-quarter.
- Combined market cap: $308B across 24 stocks.
- Largest constituent: Marsh (MRSH), $85.5B market cap.
- Most net new fund positions in Q2 2026: Arthur J. Gallagher & Co (AJG), +42 holders.
Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q2 2026.