Charles Saatchi accumulated his substantial personal wealth primarily through building, scaling, and eventually cashing out of massive global advertising empires. Alongside his brother Maurice, he co-founded the legendary agency Saatchi & Saatchi, turning it into the largest advertising agency in the world during the 1980s through aggressive corporate takeovers and lucrative client contracts. Furthermore, he built a subsequent fortune through founding M&C Saatchi, executing savvy business investments, and establishing himself as one of the most prominent contemporary art collectors and dealers in the world.