The companies are looking to create the nation's second-largest utility company by customer base, bringing together 11 regulated distribution companies, providing electric and natural gas services to about 9 million customers; operations of almost 200,000 miles of transmission and distribution lines; and more than 80,000 miles of gas pipelines.
The Virginia State Corporation Commission received a joint filing on the proposed merger Monday. Announced in August, the proposed merger has an enterprise value of about $12 billion, including assumed debt.
The transaction is expected to close in the second half of 2016.
AGL Resources is the parent company of Virginia Natural Gas, a regulated utility that provides natural gas distribution services to about 287,000 customers in Virginia Beach, Virginia. AGL Resources serves about 4.5 million utility customers with regulated distribution subsidiaries in seven states.
Both Southern Company and AGL Resources are based in Atlanta. The former has more than 4.5 million customers and boasts about 46,000 MW of generating capacity.
Southern Company is a leading provider of clean, safe, reliable and affordable electricity. The company owns utilities in four states.