2021-22 Topps UEFA Champions League Soccer Match Attax Extra Box Trading Cards. The Topps Company, Inc. is an American company that manufactures chewing gum, candy, and collectibles. Based in New York City, Topps is best known as a leading producer of American football, baseball, basketball, ice hockey, soccer, and other sports and non-sports themed trading cards. It is currently the only baseball card manufacturer with a contract with Major League Baseball.