What is SIC code 1731?

SIC code 1731 represents the Electrical Work industry. SIC (Standard Industrial Classification) is a four-digit code system used by the U.S. SEC to classify companies by their primary line of business. There are 6 public companies registered under this code in the SEC EDGAR database.

What is the largest Electrical Work company by revenue?

QUANTA SERVICES, INC. is the largest company in the Electrical Work industry by revenue, reporting $28.5B in FY2025 according to its SEC EDGAR 10-K annual filing. Companies in this industry with available XBRL data collectively reported $34.3B in revenue across their most recent fiscal years.

Electrical Work

Q: How many public companies are in the Electrical Work industry?

There are 6 SEC-registered public companies classified under SIC code 1731 (Electrical Work) in the SEC EDGAR database.

SIC 1731 · 6 companies

This page lists all SEC-registered public companies classified under SIC code 1731 (Electrical Work). SIC — Standard Industrial Classification — is a four-digit code system used by the SEC to group companies by their primary line of business. You can also view financial rankings for this industry.

The Electrical Work industry includes 6 SEC-registered public companies. The largest by revenue is QUANTA SERVICES, INC., which reported $28.5B in FY2025. Companies in this industry with available XBRL data collectively reported $34.3B in revenue across their most recent fiscal years.

Company	Ticker	Exchange	State	Filings
COMFORT SYSTEMS USA INC	FIX	NYSE	—	1,004
EMCOR Group, Inc.	EME	NYSE	DE	1,011
Energys Group Ltd	ENGS	NASDAQ	E9	66
IES Holdings, Inc.	IESC	NASDAQ	DE	1,000
Magnitude International Ltd	MAGH	NASDAQ	E9	26
QUANTA SERVICES, INC.	PWR	NYSE	DE	1,000