EL SEGUNDO, Calif.–(BUSINESS WIRE)–Mattel, Inc. (NASDAQ: MAT) (“Mattel” or the “Company”) today announced that it has entered into a cooperation agreement with EdgePoint Investment Group Inc. (“EdgePoint”), an approximately 18% stockholder of the Company. In conjunction with the cooperation agreement, the Company has appointed Lee Matheson, a Partner at EdgePoint, to the Company’s Board of Directors. Roger Lynch, Chairman and CEO of Mattel, said: “We welcome Lee to Mattel’s Board. Beyond his