Dorchester Minerals is engaged in the acquisition, ownership and administration of Royalty Properties and Net Profits Interests (NPIs). The Royalty Properties consist of producing and nonproducing mineral, royalty, overriding royalty, net profits, and leasehold interests located in several counties and parishes in several states. The NPIs represent net profits overriding royalty interests in various properties owned by the operating partnership. The company's general partner is Dorchester Minerals Management LP, which is managed by its general partner, Dorchester Minerals Management GP LLC.

Occidental Petroleum has three reporting segments: oil and gas, which explores for, develops and produces oil and condensate, natural gas liquids (NGL) and natural gas; chemical, which mainly manufactures and markets basic chemicals (chlorine, caustic soda, chlorinated organics, potassium chemicals, ethylene dichloride, chlorinated isocyanurates, sodium silicates and calcium chloride) and vinyls (vinyl chloride monomer, polyvinyl chloride and ethylene); and marketing and midstream, which purchases, markets, gathers, processes, transports and stores oil, condensate, NGL, natural gas, carbon dioxide and power.

United Parcel Service provides transportation services, primarily domestic and international letter and package delivery. The company reports its operations in three segments: United States Domestic Package, which includes the time-definite delivery of letters, documents and packages throughout the United States; International Package, which includes delivery to several countries and territories worldwide, including shipments wholly outside the United States, as well as shipments with either origin or destination outside the United States; and Supply Chain & Freight, which includes the company's Forwarding, Logistics, Coyote, Marken, UPS Mail Innovations, UPS Freight and other aggregated business units.