AT&T Inc.

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The wireless business contributes nearly 70% of AT&T's revenue. The company is the third-largest US wireless carrier, connecting 74 million postpaid and 17 million prepaid phone customers. Fixed-line enterprise services, which account for about 14% of revenue, include internet access, private networking, security, voice, and wholesale network capacity. Residential services, about 11% of revenue, primarily consist of in-home broadband internet access, serving 15 million customers. AT&T also has a sizable presence in Mexico, with 25 million wireless customers, but this business only accounts for 3% of revenue. The company recently sold its 70% equity stake in satellite television provider Dire

Market cap 181.1B · 133,030 employees

Abbott manufactures and markets cardiovascular and diabetes devices, adult and pediatric nutritional products, diagnostic equipment and testing kits, and branded generic drugs. Products include pacemakers, implantable cardioverter defibrillators, neuromodulation devices, coronary stents, catheters, infant formula, nutritional liquids for adults, continuous glucose monitors, and immunoassays and point-of-care diagnostic equipment. Abbott derives roughly 60% of sales outside the United States.