$Semgroup Corporation Class A(SEMG)$ 8-K - Current report: i Filed: 2017-07-17 AccNo: 0001193125-17-229370 Size: 7 MBItem 1.01: Entry into a Material Definitive AgreementItem 2.01: Completion of Acquisition or Disposition of AssetsItem 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Ba 网页链接