SEC Form 4: C Erik Blachford exercised 4,602 units of Class A Common Stock at a strike of $25.02, sold $804,766 worth of Class A Common Stock (4,602 units at $174.87), exercised 9,204 units of Class C Capital Stock at a strike of $28.86 and sold $1,539,402 worth of Class C Capital Stock (9,204 units at $167.25), increasing ownership by 100% to 6,284 units