Company: SOJE
Filing Date: 2025-11-04
Form Type: 424B2
Source: 0000092122-25-000092
Chunk: 66

Company: SOUTHERN CO
Filing Date: 2025-11-04
Form: 424B2
Chunk 66
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, a holder is required to:

• deposit with the collateral agent a RSN of each series having a principal amount of $1,000, which must be purchased in the open market at the expense of the Treasury Unit holder, unless otherwise owned by the holder; and

<div align='center'>S-40</div>

• transfer to the purchase contract agent 40 Treasury Units, accompanied by a notice stating that the holder of the Treasury Units has deposited a RSN of each series having a principal amount of $1,000 with the collateral agent and requesting that the purchase contract agent instruct the collateral agent to release the related Treasury securities.

Upon receiving instructions from the purchase contract agent and receipt of a RSN of each series having a principal amount of $1,000, the collateral agent will promptly release the related Treasury securities from the pledge and promptly instruct the securities intermediary to transfer such Treasury securities to the purchase contract agent for distribution to the holder, free and clear of the Company’s security interest. The purchase contract agent then will:

• cancel the 40 Treasury Units;

• transfer the related Treasury securities to the holder; and

• deliver 40 Corporate Units to the holder.

The $1,000 principal amount RSN of each series will be substituted for the Treasury securities and will be pledged to the Company through the collateral agent to secure the holder’s obligation to purchase shares of the Company’s common stock under the related purchase contracts. The Treasury securities thereafter will trade and be transferable separately from the Corporate Units.

Holders who recreate Corporate Units will be responsible for any taxes, governmental charges or other fees or expenses (including, without limitation, fees and expenses payable to the collateral agent) attributable to the collateral substitution. See “Certain Provisions of the Purchase Contract and Pledge Agreement—Miscellaneous.”

#### Payments on the Equity Units
Holders of Corporate Units and Treasury Units will receive quarterly contract adjustment payments payable by the Company at the rate of 2.975% per year on the stated amount of $50 per Equity Unit. The Company will make all contract adjustment payments on the Corporate Units and the Treasury Units quarterly in arrears on March 15, June 15, September 15 and December 15 of each year (except that if any such date is not a business day, contract adjustment payments will be payable on the following business day, without adjustment), commencing March 15, 2026. Unless the purchase contracts have been terminated (as described under “Description of the Purchase Contracts—Termination” below), the