EVP, Gen Counsel & Secretary Hall Bryan H converted options into 4,225 units of Class A Common Shares, covered exercise/tax liability with 1,849 units of Class A Common Shares, converted options into 4,225 units of Class C Common Shares and covered exercise/tax liability with 1,849 units of Class C Common Shares, decreasing direct ownership by 19% to 179,156 units (SEC Form 4)