SOUTHERN CO

For the period ended Jun 30, 2024. Filed Aug 1, 2024.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2024 · Filed Aug 1, 2024

SO$93.57+1.3%Stored close · as of Nov 9, 2026

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Contents

Acquisitions and Dispositions

(K)ACQUISITIONS AND DISPOSITIONS

See Note 15 to the financial statements in Item 8 of the Form 10-K for additional information.

Construction Projects

During the six months ended June 30, 2024, Southern Power completed construction of and placed in service the 150-MW South Cheyenne solar facility. In addition, Southern Power continued construction of the 200-MW first phase and the 180-MW second phase of the Millers Branch solar facility. Southern Power also committed to expand construction by an additional 90 MWs through a third phase of the Millers Branch solar project. At June 30, 2024, the total cost of construction incurred for the Millers Branch project was $117 million, which is primarily included in CWIP.

Project Facility	Resource	Approximate Nameplate Capacity (MW)	Location	Projected/Actual COD	PPA Contract Period
Projects Completed During the Six Months Ended June 30, 2024
South Cheyenne	Solar	150	Laramie County, WY	Second quarter 2024	20 years
Projects Under Construction at June 30, 2024
Millers Branch(*)
Phase I	Solar	200	Haskell County, TX	Fourth quarter 2025	20 years
Phase II	Solar	180	Haskell County, TX	Second quarter 2026	15 years
Phase III	Solar	90	Haskell County, TX	Fourth quarter 2026	15 years

(*)The Millers Branch project includes an option to expand capacity up to a total of approximately 500 MWs.

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