MD, CHIEF ACCOUNTING OFFICER Zook Brian D converted options into 12,918 units of Class A Common Shares, covered exercise/tax liability with 3,715 units of Class A Common Shares, converted options into 25,837 units of Class C Common Shares and covered exercise/tax liability with 7,429 units of Class C Common Shares, increasing direct ownership by 387% to 33,168 units (SEC Form 4)