Range Resources Corp. (NYSE: RRC) said Sept. 16 that it completed its $4.2 billion merger with Houston-based Memorial Resource Development Corp.

The value of the all-stock transaction, which included the assumption of Memorial Resource's debt, was about $200 million less than originally reported when the deal was announced May 16.

The deal shifts Fort Worth, Texas-based Range’s focus outside of the Appalachian Basin to the Gulf Coast.