Antero Resources Set To Join S&P MidCap 400, To Replace Alleghany
Antero Resources Corp. (NYSE:AR) will replace Alleghany Corp. (NYSE:Y) in the S&P MidCap 400 effective prior to the opening of trading on Thursday, October 20. S&P 500 constituent Berkshire Hathaway Inc. (NYSE:BRK, BRK.B))) is acquiring Alleghany in a deal expected to be completed soon, pending final closing conditions.