When did MLM join the S&P 500?

Martin Marietta joined the S&P 500 index on 2014-07-02.

What sector is MLM in?

MLM is in the Materials sector, Construction Materials industry.

MLM — Martin Marietta

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

Construction Materials · Materials

S&P 500 Timeline

2014-07-02Joined S&P 500

Martin Marietta Materials supplies aggregates such as crushed stone, sand, and gravel through its network of quarries and distribution yards. The company operates through the following geographic segments: the Eastern Group and the Western Group. The Eastern Group segment only provides aggregate products. The Western Group provides aggregates, cement, and downstream products including ready-mixed concrete, asphalt, and paving services.

Key Facts

Status	Active
Sector	Materials
Industry	Construction Materials
Joined	2014-07-02
Tenure	12 yrs

Industry Peers

CRH VMC

Sector Peers

ALB AMCR APD AVY BALL CF CRH CTVA DD DOW

Institutional Holdings (13F)

1,075 institutions hold MLM, totaling 69.9M shares ($38.7B) · As of 2026Q1

Rank	Institution	Shares	Value
1	VANGUARD CAPITAL MANAGEMENT LLC	7.8M	$4.6B
2	BlackRock, Inc.	4.7M	$2.8B
3	MORGAN STANLEY	4.0M	$2.5B
4	VANGUARD PORTFOLIO MANAGEMENT LLC	3.2M	$1.9B
5	STATE STREET CORP	2.9M	$1.7B
6	FMR LLC	2.6M	$1.5B
7	BANK OF AMERICA CORP /DE/	2.4M	$1.4B
8	PRINCIPAL FINANCIAL GROUP INC	2.1M	$1.2B
9	Aristotle Capital Management, LLC	2.0M	$1.2B
10	JPMORGAN CHASE & CO	1.9M	$1.1B

View all holders →

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