This industry group comprises establishments primarily engaged in operating (1) general warehouses and storage facilities; (2) refrigerated warehousing and storage; (3) farm product warehousing and storage; and (4) operating other warhousing and storage facilities, such as bulk petroleum storage, lumber storage terminals, and whiskey warehousing.

For the 2012 and 2007 Commodity Flow Surveys, this industry group only includes captive (enterprise support) warehouses that provide storage and shipping support to other establishments of the same company. Warehouses offering their services to the general public and other businesses are excluded. For tabulation and publication purposes, NAICS Subsector 484 (Truck Transportation) is grouped with NAICS Industry Group 4931 (Warehousing and Storage).