[2] In October 1898 Giovanni Battista and Matteo co-founded Ceirano GB & C and started producing the Welleyes motor car in 1899.
Giovanni Battista was employed by Fiat as the agent for Italy, but within a year he left to found Fratelli Ceirano & C. which in 1903 became Società Torinese Automobili Rapid (S.T.A.R.)
On 25 August 1923 he increased the capital of SCAT by 700,000 liras by amalgamating Fabbrica Automobili Ceirano with 'SCAT' to form SCAT-Ceirano.
In 1934 he acquired the car company Fabrica Anonima Torinese Automobili (FATA) again with his son Giovanni "Ernesto".
Fiat had imposed legal restrictions on the sale of SCAT-Ceirano preventing him from being an automotive manufacturer, so the FATA business was reoriented to make auto parts in 1945.