When did MRSH join the S&P 500?

Marsh McLennan joined the S&P 500 index on 1987-08-31.

What sector is MRSH in?

MRSH is in the Financials sector, Insurance Brokers industry.

MRSH — Marsh McLennan

Name: MRSH Institutional Holdings (13F) — 2026Q1
Creator: SEC EDGAR
License: https://www.sec.gov/data

Insurance Brokers · Financials

S&P 500 Timeline

1987-08-31Joined S&P 500

Marsh & McLennan Companies is a professional services firm that advises and helps clients with risk, strategy, and talent solutions. It operates through two segments: Risk and Insurance Services and Consulting. The Risk and Insurance Services segment provides risk management services, as well as insurance and reinsurance brokerage. The Consulting segment offers health, wealth and career solutions and products, along with specialized management, strategy, economic and brand consulting services.

Key Facts

Status	Active
Sector	Financials
Industry	Insurance Brokers
Joined	1987-08-31
Tenure	38 yrs

Industry Peers

AJG AON BRO ERIE WTW

Sector Peers

ACGL AFL AIG AIZ AJG ALL AMP AON APO ARES

Institutional Holdings (13F)

1,538 institutions hold MRSH, totaling 531.5M shares ($90.0B) · As of 2026Q1

Rank	Institution	Shares	Value
1	VANGUARD CAPITAL MANAGEMENT LLC	62.9M	$10.9B
2	BlackRock, Inc.	42.1M	$7.3B
3	BARCLAYS PLC	24.2M	$4.9B
4	STATE STREET CORP	22.1M	$3.8B
5	MORGAN STANLEY	20.4M	$3.8B
6	Capital World Investors	18.0M	$3.1B
7	WELLINGTON MANAGEMENT GROUP LLP	17.4M	$3.0B
8	Capital International Investors	15.7M	$2.7B
9	GEODE CAPITAL MANAGEMENT, LLC	13.4M	$2.3B
10	VANGUARD PORTFOLIO MANAGEMENT LLC	12.4M	$2.2B

View all holders →

Data source: Wikipedia · CC BY-SA 4.0 · SEC EDGAR 13F · Updated 2026-07-10