SunEdison Semiconductor Limited 501 Pearl Drive (City of O'Fallon) St. Peters, MO 63376 United States 636-474-5000 http://www.sunedisonsemi.com SunEdison Semiconductor Limited develops, manufactures, and sells silicon wafers in the United States and internationally. The company provides polished wafers for various applications, including memory, analog, radio frequency (RF) devices, digital signal processors, and power devices; epitaxial wafers that enhance the reliability and decrease the power consumption of semiconductor devices in mobile device and cloud infrastructure applications; and silicon-on-insulator wafers, which enhance switching speeds and the performance of RF devices, such as power amplifiers, switches, and sensors. It also sells intermediate products consisting of polysilicon, trichlorosilane gas, ingots, and scrap wafers to semiconductor device and equipment makers. SunEdison Semiconductor Limited sells its products to semiconductor manufacturers comprising integrated device manufacturers and pure-play semiconductor foundries, as well as wafer customization companies. The company was founded in 1959 and is headquartered in St. Peters, Missouri.