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SOSouthern Company

Utilities · Electric Utilities · NYSE
SO quote by TradingView
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Filings with the SEC since Feb 17, 2021

1,010 filings, 7 in the last 30 days

SEC filing index
Latest annual reportOpen ↗
Feb 19, 2026
10-K, period to Dec 31, 2025
Latest quarterly reportOpen ↗
Nov 5, 2026
10-Q, period to Sep 30, 2026
Latest current reportOpen ↗
Nov 5, 2026
8-K: Quarterly results
Filed in the last 30 days
7
of 1,010 in all
Timeline

Every filing on one line

1 yr2 yr3 yr
Annual report (10-K)Quarterly report (10-Q)Current report (8-K)Auditor changeCEO, CFO, COO or CAO changeRestatementLate filing noticeInsider purchaseCluster buy (3+ insiders)SEC comment letterShare offering (S-3, 424B)
All 45 events

From the SEC filing index. Insider purchases go back 180 days (the Form 4s downloaded).

Every filing

Newest first, by kind

Each form links to sec.gov
All 1010 Annual & quarterly 24Current reports (8-K) 108Insiders 731Proxy & votes 35Big owners (13D/13G) 15Shares & debt offered 67SEC letters 5Other 25
FiledFormWhat it isPeriod
Nov 9, 20264 Insider tradeNov 6, 2026 all files
Nov 6, 2026144 Notice of planned insider sale all files
Nov 5, 20268-K Quarterly resultsNov 5, 2026 all files
Nov 5, 202610-Q Quarterly reportSep 30, 2026 all files · tables
Nov 3, 20264 Insider tradeNov 2, 2026 all files
Nov 2, 2026144 Notice of planned insider sale all files
Oct 22, 20268-K Bylaws or fiscal year changed, Other eventsOct 20, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 5, 20264 Insider tradeOct 1, 2026 all files
Oct 1, 2026144 Notice of planned insider sale all files
Oct 1, 20264 Insider tradeOct 1, 2026 all files
Sep 4, 20264 Insider tradeSep 3, 2026 all files
Sep 4, 20264 Insider tradeSep 3, 2026 all files
Sep 3, 2026144 Notice of planned insider sale all files
Sep 3, 2026144 Notice of planned insider sale all files
Sep 3, 20264 Insider tradeSep 1, 2026 all files
Sep 1, 2026144 Notice of planned insider sale all files
Aug 7, 20264 Insider tradeAug 6, 2026 all files
Aug 6, 2026144 Notice of planned insider sale all files
Aug 6, 20268-K New debt or obligation, Unregistered share saleAug 3, 2026 all files
Aug 4, 20264 Insider tradeAug 3, 2026 all files
Aug 4, 20268-K Other eventsAug 3, 2026 all files
Aug 3, 2026144 Notice of planned insider sale all files
Aug 3, 20268-K Other eventsAug 3, 2026 all files
Jul 30, 20268-K Quarterly resultsJul 30, 2026 all files
Jul 30, 202610-Q Quarterly reportJun 30, 2026 all files · tables
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 2, 20264 Insider tradeJul 1, 2026 all files
Jul 1, 2026144 Notice of planned insider sale all files
Jun 29, 20264 Insider tradeJun 28, 2026 all files
Jun 26, 202611-K Employee plan annual reportDec 31, 2025 all files
Jun 8, 2026424B2 Prospectus (notes) all files
Jun 8, 20268-K Other eventsJun 8, 2026 all files
Jun 5, 2026S-3ASR Shelf registration all files
Jun 1, 2026144 Notice of planned insider sale all files
Jun 1, 20264 Insider tradeJun 1, 2026 all files
May 26, 20264 Insider tradeMay 24, 2026 all files
May 20, 2026SD Conflict minerals report all files
May 15, 20268-K Shareholder vote resultsMay 13, 2026 all files
May 14, 2026SCHEDULE 13G 5%+ owner (passive) all files
May 5, 2026DEFA14A Extra proxy material all files
May 4, 20264 Insider tradeMay 1, 2026 all files
May 1, 2026144 Notice of planned insider sale all files
Apr 30, 2026SCHEDULE 13G 5%+ owner (passive) all files
Apr 30, 20268-K Quarterly resultsApr 30, 2026 all files
Apr 30, 202610-Q Quarterly reportMar 31, 2026 all files · tables
Apr 3, 2026ARS Annual report to shareholdersDec 31, 2025 all files
Apr 3, 2026DEFA14A Extra proxy material all files
Apr 3, 2026DEF 14A Proxy statementMay 13, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Apr 2, 20264 Insider tradeApr 1, 2026 all files
Mar 31, 20264 Insider tradeMar 30, 2026 all files
Mar 30, 2026144 Notice of planned insider sale all files
Mar 27, 2026SCHEDULE 13G/A 5%+ owner (passive), amended all files
Mar 23, 2026PRE 14A May 13, 2026 all files
Mar 19, 2026144 Notice of planned insider sale all files
Mar 19, 20264 Insider tradeMar 19, 2026 all files
Mar 19, 20264 Insider tradeMar 18, 2026 all files
Mar 19, 20268-K Other eventsMar 16, 2026 all files
Mar 18, 2026144 Notice of planned insider sale all files
Mar 17, 2026424B2 Prospectus (notes) all files
Mar 16, 2026FWP Offering terms all files
Mar 16, 2026424B5 Prospectus all files
Mar 10, 20264 Insider tradeMar 8, 2026 all files
Mar 10, 20264 Insider tradeMar 6, 2026 all files
Mar 5, 2026SCHEDULE 13G/A 5%+ owner (passive), amended all files
Mar 2, 20264 Insider tradeFeb 26, 2026 all files
Feb 25, 20264 Insider tradeFeb 24, 2026 all files
Feb 25, 20268-K Material agreement signed, New debt or obligationFeb 20, 2026 all files
Show the other 75 filings on this page

Press releases with quarterly results are attached to the 8-Ks marked "Quarterly results"; read them on Earnings releases.

Next Earnings releases →