XML 86 R58.htm IDEA: XBRL DOCUMENT v3.23.2
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 120th 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.
NameTitleDate of AdoptionExpiration
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