T vs TMO Comparison

The wireless business contributes about two thirds of AT&T's revenue. The firm is the third-largest US wireless carrier, connecting 72 million postpaid and 17 million prepaid phone customers. Fixed-line enterprise services, which account for about 16% of revenue, include internet access, private networking, security, voice, and wholesale network capacity. Residential fixed-line services, about 11% of revenue, primarily consist of broadband internet access, serving 14 million customers. AT&T also has a sizable presence in Mexico, with 22 million customers, but this business only accounts for 3% of revenue. The firm still holds a 70% equity stake in satellite television provider DirecTV but does not consolidate this business in its financial statements.

Thermo Fisher Scientific sells scientific instruments and laboratory equipment, diagnostics consumables, and life science reagents. The firm operates through four segments as of mid-2024 (revenue figures include some cross-segment revenue): analytical technologies (17% of sales); specialty diagnostic products (11%); life science solutions (22%); and lab products and services, which includes CRO services (54%).