The Southern Company Announces Adjustment to Conversion Rate for Series 2023A Convertible Senior Notes

Details

The new conversion rate is 11.9035 shares of Common Stock per $1,000 principal amount of the Series 2023A Notes, effective as of September 15, 2025. This adjustment was made to account for previously deferred adjustments to the conversion rate that did not require a change of at least one percent under the terms of the Supplemental Indenture. The notice of the adjustment is attached as Exhibit 99.1 to this Current Report on Form 8-K and will also be posted to the fixed income section of the Company's investor relations website.

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About Southern Company

Southern Company is a leading energy company in the United States, primarily focusing on electricity generation, transmission, and distribution. It serves a substantial customer base across the southern region of the U.S., providing reliable electric service through its subsidiaries. The company generates electricity through various energy sources, including natural gas, coal, nuclear, and renewables, reflecting its commitment to a diverse energy portfolio. Southern Company plays a vital role in the utilities sector, significantly impacting the energy infrastructure and economic development of the regions it serves. Its efforts towards sustainability and innovation are noteworthy, aiming to incorporate cleaner energy solutions to reduce carbon emissions. Headquartered in Atlanta, Georgia, Southern Company is a critical entity in the utility industry and is known for its robust service delivery and strategic investments in energy technologies. Its operations encompass traditional utility services, wholesale energy services, and energy infrastructure development, making it a key player in shaping the future of energy in the United States.