While some of the larger movie and music agencies, such as the Los Angeles-based WME (part of Frieze’ parent company, Endeavor) and Creative Artists Agency (CAA), only occasionally focus on the visual arts, others like UTA (United Talent Agency) has a whole division devoted to it.
Regarding the burning question of commission rates, all three structures say they take less than a traditional gallery (which would typically take 50% of sales). Tanguy receives 30% of the sale of a work of art and 40% on collaborations and public art projects.