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Insider Trading Arrangements | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 shares | Jun. 30, 2023 shares
Trading Arrangements, by Individual |  |
Non-Rule 10b5-1 Arrangement Adopted | false |
Rule 10b5-1 Arrangement Terminated | false |
Non-Rule 10b5-1 Arrangement Terminated | false |
Officer Trading Arrangement [Member] |  |
Trading Arrangements, by Individual |  |
Material Terms of Trading Arrangement |  | The following table reports information regarding the adoption, modification, or termination of "Rule 10b5-1 trading arrangements" or "non-Rule 10b5-1 trading arrangements," as defined in Item 408(a) of Regulation S-K, during the three months ended June 30, 2023 for Southern Company's directors and "officers," as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, as amended. There were no modifications or terminations of such trading arrangements during the three months ended June 30, 2023. Unless otherwise indicated, each trading arrangement listed below is a "Rule 10b5-1 trading arrangement," provides for the sale of shares of Southern Company's common stock, commences no earlier than the 120 th day after the "Date of Adoption" listed below, and terminates upon the earlier of the "Expiration Date" listed below or the completion of all sales. The Subsidiary Registrants had no reportable trading arrangements for the three months ended June 30, 2023.
Name | Title | Date of Adoption | Expiration Date | Aggregate Number of Shares Covered
Christopher Cummiskey | Executive Vice President | May 4, 2023 | August 29, 2024 | 22,064(1)
Anthony L. Wilson | Chairman, President, and Chief Executive Officer of Mississippi Power | May 8, 2023 | August 30, 2024 | 1,360(2)
(1)Includes shares underlying equity awards subject to performance conditions and accrual of dividend-equivalent rights. Accordingly, the total number of shares ultimately available for sale could be more or less than the amount shown. The amount shown is based on the target number of shares subject to equity awards and the dividend-equivalent rights accrued as of the date of adoption. (2)Shares to be donated to a charitable organization.
Officer Trading Arrangement [Member] | Christopher Cummiskey [Member] |  |
Trading Arrangements, by Individual |  |
Name | Christopher Cummiskey |
Title | Executive Vice President |
Rule 10b5-1 Arrangement Adopted | true |
Adoption Date | May 4, 2023 |
Aggregate Available | 22,064 | 22,064
Officer Trading Arrangement [Member] | Anthony L. Wilson [Member] |  |
Trading Arrangements, by Individual |  |
Name | Anthony L. Wilson |
Title | Chairman, President, and Chief Executive Officer of Mississippi Power |
Rule 10b5-1 Arrangement Adopted | true |
Adoption Date | May 8, 2023 |
Aggregate Available | 1,360 | 1,360

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