Company: SOJE
Filing Date: 2025-11-03
Form Type: 424B5
Source: 0000092122-25-000088
Chunk: 56

Company: SOUTHERN CO
Filing Date: 2025-11-03
Form: 424B5
Chunk 56
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 convertible arbitrage strategy with respect to the Existing Convertible Senior Notes and have a short position with respect to the Common Stock that they would close, through purchases of the Common Stock and/or the entry into or unwind of economically equivalent derivatives transactions with respect to the Common Stock, in connection with the Company’s repurchase of their Existing Convertible Senior Notes for cash. This activity could increase (or reduce the size of any decrease in) the market price of the Common Stock or the Equity Units at that time and could result in a higher effective reference price for the stock purchase contract component of the Equity Units. In addition, the market price of the Common Stock is likely to be affected by short sales of the Common Stock and/or the entry into economically equivalent derivatives transactions with respect to the Common Stock by investors in the Equity Units. The Company cannot predict the magnitude of such market activity or the overall effect it will have on the price of the Equity Units offered hereby or the Common Stock or the corresponding effect on the reference price of the stock purchase contract component of the Equity Units.

<div align='center'>S-34</div>

### USE OF PROCEEDS
The Company estimates that the net proceeds from the sale of the Equity Units in this offering will be approximately $ (approximately $ if the underwriters exercise their option to purchase additional Corporate Units in full), after deducting the underwriting discounts and commissions but before deducting other offering expenses.

Concurrently with this offering, in separate transactions, the Company intends to use approximately $ of the net proceeds of this offering to repurchase $ aggregate principal amount of the Series 2023A Convertible Senior Notes and $ aggregate principal amount of the Series 2024A Convertible Senior Notes, in each case through privately negotiated transactions with a limited number of holders of the Existing Convertible Senior Notes. The final amounts of the outstanding Existing Convertible Senior Notes to be repurchased and the terms thereof are being individually negotiated and will depend on, among other things, the market price of the Common Stock and the trading prices of the applicable Existing Convertible Senior Notes at the time of repurchase. The outstanding Series 2023A Convertible Senior Notes and Series 2024A Convertible Senior Notes bear interest at a rate of 3.875% per annum and 4.50% per annum, respectively. As of September 30, 2025, the outstanding aggregate principal amount of the Series 2023A Convertible Senior Notes was approximately $943.4 million and the outstanding aggregate principal amount of the Series