On January 9, 2026, Northern Illinois Gas Company ("Nicor Gas"), a wholly-owned subsidiary of Southern Company Gas, filed a general base rate case with the Illinois Commerce Commission (the "Illinois Commission") requesting a $221 million increase in annual base rate revenues. The requested increase is based on a projected test year for the 12-month period ending December 31, 2027, a return on equity of 10.35% and an equity ratio of 54.6%.
The Illinois Commission is expected to rule on the requested increase within the 11-month statutory time limit, after which rate adjustments will be effective. The ultimate outcome of this matter cannot be determined at this time.