Sr MD Gl Hd Commodities Mkts Sammann Derek disposed of 4,629 units of Common Stock Class A, acquired 4,629 units of Common Stock Class A, was granted 2,864 units of Common Stock Class A and covered exercise/tax liability with 1,413 units of Common Stock Class A, decreasing direct ownership by 24% to 10,134 units (SEC Form 4) (tax withholding)