$ProShares S&P 500 Aristocrats(NOBL)$ 8-K - Current report Filed: 2009-06-26 AccNo: 0001193125-09-139465 Size: 15 KBItem 1.01: Entry into a Material Definitive AgreementItem 2.01: Completion of Acquisition or Disposition of AssetsItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appoin 网页链接