TEF vs GFS Comparison

Telefonica operates mobile and fixed networks in Spain (where it is the incumbent operator), the UK, Germany, Brazil, and Latin American countries. The company derives more than 30% of its revenue from Spain, close to 20% from Germany, and 20% from Brazil. Its UK operations are held through a joint venture with Virgin Media. For several years Telefonica has been simplifying its corporate structure by selling noncore assets.

GlobalFoundries is a top-five contract semiconductor manufacturer globally. It was originally the manufacturing arm of Advanced Micro Devices before it was spun out in 2009. The foundry sells chips into a range of end markets including smartphones, PCs, Internet of Things, data centers, automotive, industrial, and so on, but primarily focuses on more mature process technologies. Until 2021, the firm was privately held by Mubadala Investment, the sovereign wealth fund of the United Arab Emirates, which remains its controlling shareholder today. GlobalFoundries merged with Chartered Semiconductor Manufacturing in 2009 and acquired IBM's chipmaking business in 2015. GF is headquartered in Malta, New York, and employs about 13,000 people.