Each company in the database is assigned to an industry segment based on here they derive the majority of their revenue from. Those segments are then rolled up to industry segments.

The table below shows the number of companies in each industry alongside the largest provider in each.

Financial Services 877 Berkshire Hathaway
Industrials (non Auto) 496 Samsung Electronics Co
Basic Materials 441 Glencore International AG
Retail 419 Wal-Mart Stores, Inc.
Consumer Goods 368 Procter & Gamble
Food 303 Cargill
Business Services 268 Google, Inc. (Alphabet)
Technology 262 Apple, Inc.
Oil 257 Saudi Aramco
Health Care 255 McKesson Corporation
Construction 240 China State Construction Engineering
Transport 225 Japan Post Holdings
Utility 191 State Grid
Autos & Trucks 144 Toyota Motor Corporation
Telecom 131 AT&T, Inc.
Publishing 123 Twenty-First Century Fox, Inc.