S-TEC Corporation is a United States corporation that was founded in 1978 and is headquartered in Mineral Wells, Texas. It manufactures flight control systems for the General Aviation aftermarket and for a number of original equipment manufacturers. S-TEC appeared to have been the leader in the general aviation autopilot market for small- and mid-sized planes, though Garmin's GFC 500 autopilot appears to have become more popular after its release in 2017.
Genesys Aerosystems has a number of forward-fit autopilot customers including Pilatus, Indonesian Aerospace, Epic Aircraft, and Aviat Aircraft. Their latest autopilot, the S-TEC 3100, has earned Supplemental Type Certificate (STC) on over 100 aircraft models.
Meggitt acquired S-TEC and S-TEC Unmanned Technologies (SUTI) for $24 million in 2000. (DRS Technologies purchased the UAV business from Meggitt in 2002 but later closed the Mineral Wells facility.)
S-TEC was purchased for $38 million by Cobham plc in 2008.
In April 2014, Cobham sold Chelton Flight Systems and S-TEC Corporation to Genesys Aerosystems.