By Kathryn Hardison


Antero Resources Corp. will join the S&P MidCap 400, replacing Alleghany Corp.

The transition will be effective prior to the beginning of trading on Thursday, the S&P Dow Jones Indices said Monday.

Berkshire Hathaway Inc., an S&P 500 member, is acquiring Alleghany in a deal that is expected to be completed soon, S&P Dow Jones Indices said. Alleghany owns operating subsidiaries and manages investments, anchored by a core position in property and casualty reinsurance and insurance.

Antero Resources is an independent natural-gas and natural-gas liquids company. It is involved in the acquisition, development and production of unconventional properties located in the Appalachian Basin in West Virginia and Ohio.

Shares of Antero rise 5.7% to $35.86 in after-hours trading.


Write to Kathryn Hardison at kathryn.hardison@wsj.com


(END) Dow Jones Newswires

10-17-22 1814ET