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A merger between Italian firm SGS Microelettronica and the nonmilitary business of Thomson Semiconductors in France formed STMicroelectronics in 1987. STMicroelectronics is a leader in a variety of semiconductor products, including analog chips, discrete power semiconductors, microcontrollers, and sensors. It is an especially prominent chip supplier to the industrial and automotive industries.
Ameren owns rate-regulated generation, transmission, and distribution networks that deliver electricity and natural gas in Missouri and Illinois. It serves more than 2.4 million electricity customers and more than 900,000 natural gas customers.