T vs ASML Comparison

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 DirecTV to its partner, private equity firm TPG.

ASML is the leader in lithography systems for manufacturing semiconductors with 90% market share. Lithography is the process in which a light source is used to expose circuit patterns from a photo mask onto a semiconductor wafer. Lithography allows chipmakers to increase the number of transistors on the same area of silicon, with lithography historically representing a high portion of the cost of making cutting-edge chips. ASML outsources the manufacturing of most of its parts, acting like an assembler. ASML's largest clients are TSMC, Samsung, Intel, SK Hynix, and Micron.