3 Agencies You've Never Heard of That Handle Walmart, BK, Pepsi

Big brands cast small shops in leading roles

The Martin Agency may be Walmart's lead creative shop, but Vimby, a 50-person agency in Van Nuys, Calif., creates more TV ads for the retailer. Likewise, two other West Coast shops, Pitch and Mekanism, have become mainstays for Burger King and Pepsi, respectively.