Last year roared and howled for Giant Spoon, the four-year-old agency that won four Cannes Lions for a campaign about a wolf. The shop, with offices in Los Angeles and New York, attracted new clients including Paramount Pictures, MassMutual, Uber and Warner Bros., which helped grow annual revenue to $14.5 million, triple that of 2015. Meanwhile, campaigns with existing accounts, such as a digital series for HP starring a "Mr. Robot"-ready Christian Slater as a printer hacker named the Wolf, have garnered creative acclaim for the fast-growing agency.