Browse by industry

Companies by industry (SIC code)

The SEC assigns every registrant a four-digit Standard Industrial Classification (SIC) code based on its main line of business. Here are the 361 SIC industries among the 3,000 companies OpenFilings tracks, grouped into the ten SIC divisions. Updated Oct 27, 2026, 11:27 PM EDT.

Agriculture, Forestry and Fishing · 8 companies

Mining, Oil and Gas · 185 companies

Construction · 43 companies

Manufacturing · 1,068 companies

Transportation, Communications and Utilities · 271 companies

Wholesale Trade · 58 companies

Retail Trade · 127 companies

Finance, Insurance and Real Estate · 681 companies

Services · 532 companies

SIC codes come from each company’s EDGAR record and describe its primary business as classified by the SEC; a company with several businesses still has one code. Industries with fewer than 3 tracked companies have their own page but are not listed in our sitemap.