Sauber Motorsport AG is a Swiss motorsport engineering company. It was founded in 1970 by Peter Sauber, who progressed through hillclimbing and the World Sportscar Championship to reach Formula One in 1993. Sauber operated under their own name from 1993 until 2005 and from 2011 until 2018. They were known as BMW Sauber from 2006 to 2010 and as Alfa Romeo from 2019 to 2023 in partnership deals with BMW and Alfa Romeo respectively. Sauber returned in 2024 as Stake F1 Team Kick Sauber, and is set to be the Audi works team from 2026 onwards, with the German outfit planning to acquire the Swiss team.

Italian motor manufacturer Alfa Romeo has participated multiple times in Formula One. The brand has competed in motor racing as both a constructor and engine supplier sporadically between 1950 and 1987, and later as a commercial partner between 2015 and 2023. The company's works drivers won the first two World Drivers' Championships in the pre-war Alfetta: Nino Farina in 1950 and Juan Manuel Fangio in 1951. Following these successes, Alfa Romeo withdrew from Formula One.