When did MAS join the S&P 500?

Masco joined the S&P 500 index on 1981-06-30.

What sector is MAS in?

MAS is in the Industrials sector, Building Products industry.

MAS — Masco

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

Building Products · Industrials

Masco Corporation designs, manufactures, and distributes brand-name home improvement and building products. It operates through two segments: Plumbing Products and Decorative Building Products. The Plumbing Products segment includes faucets, showerheads, handheld showers, valves, bathroom hardware and accessories, bathing units, shower bases and enclosures, shower drains, steam shower systems, sinks, kitchen accessories, and toilets. The Decorative Building Products segment focuses on architectural coatings, including paints, primers, specialty coatings, stains, and waterproofing products, as well as paint applicators and accessories.

Industry Peers

ALLE AOS BLDR CARR JCI LII TT

Sector Peers

ADP ALLE AME AOS AXON BA BLDR BR CARR CAT

Key Facts

Status	Active
Sector	Industrials
Industry	Building Products
Joined	1981-06-30
Tenure	45 yrs

S&P 500 Timeline

1981-06-30Joined S&P 500

Institutional Holdings (13F)

839 institutions hold MAS, totaling 233.0M shares ($13.5B) · As of 2026Q1

Rank	Institution	Shares	Value
1	VANGUARD CAPITAL MANAGEMENT LLC	26.4M	$1.6B
2	BlackRock, Inc.	15.6M	$943M
3	VANGUARD PORTFOLIO MANAGEMENT LLC	12.4M	$746M
4	STATE STREET CORP	10.0M	$601M
5	MORGAN STANLEY	8.2M	$532M
6	BARCLAYS PLC	7.6M	$528M
7	HARRIS ASSOCIATES L P	8.6M	$519M
8	JPMORGAN CHASE & CO	6.6M	$389M
9	GEODE CAPITAL MANAGEMENT, LLC	5.4M	$322M
10	Boston Partners	4.5M	$271M

View all holders →

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