Company: SOJE
Filing Date: 2025-11-03
Form Type: 424B5
Source: 0000092122-25-000088
Chunk: 40

Company: SOUTHERN CO
Filing Date: 2025-11-03
Form: 424B5
Chunk 40
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 collateral agent. During a blackout period or following a successful remarketing, you may not create Treasury Units or recreate Corporate Units. (2) Contract adjustment payments may be deferred as described under “Description of the Purchase Contracts—Contract Adjustment Payments” below. The holder of a Treasury Unit owns the 1/20 undivided beneficial ownership interest in the Treasury security that forms a part of the Treasury Unit, but will pledge it to the Company through the collateral agent to secure the holder’s obligation under the related purchase contract.

<div align='center'>S-21</div>

#### Purchase Contract
Corporate Units and Treasury Units both include a purchase contract under which the holder agrees to purchase shares of the Company’s common stock on the purchase contract settlement date. In addition, the purchase contracts require the Company to make contract adjustment payments as shown in the diagrams on the preceding pages.

(1) The “reference price” is $ , which will be the closing price of the Company’s common stock on the New York Stock Exchange on the date the Equity Units are priced.

(2) The “threshold appreciation price” is equal to $50 divided by the minimum settlement rate (such quotient rounded to the nearest $0.0001), which is $ and represents appreciation of approximately % over the reference price.

(3) If the applicable market value of the Company’s common stock is less than or equal to the reference price of $ , shares of the Company’s common stock (subject to adjustment).

(4) If the applicable market value of the Company’s common stock is greater than the reference price and less than the threshold appreciation price of $ , the number of shares of the Company’s common stock to be delivered to a holder of an Equity Unit will be calculated by dividing the stated amount of $50 by the applicable market value, rounded to the nearest ten thousandth of a share (subject to adjustment).

(5) If the applicable market value of the Company’s common stock is greater than or equal to the threshold appreciation price, the number of shares of the Company’s common stock to be delivered to a holder of an Equity Unit will be shares (subject to adjustment).

(6) The “applicable market value” means the average of the VWAP of the Company’s common stock on each trading day during the 20 consecutive scheduled trading day period ending on the third scheduled trading day immediately preceding the purchase contract settlement date (subject to adjustment as described herein if a market disruption event occurs).

<div align='center'>S-22</div>

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