SEC Form 4: N Richard Barton exercised 87,500 units of Class C Capital Stock at a strike of $35.48, sold $14,624,790 worth of Class C Capital Stock (87,500 units at $167.14), exercised 43,750 units of Class A Common Stock at a strike of $30.75 and sold $7,669,934 worth of Class A Common Stock (43,750 units at $175.31), increasing ownership by 3,916% to 5,643,940 units