SO insider buying and SEC filings, explained
Southern Co. · CIK 92122
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$768K
Planned sales (10b5-1)
$4.9M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Nov 2, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $93.39 ($9K), marked as a 10b5-1 plan trade. Holdings down 2% to 4,788 shares. | SEC filing Filed Nov 3, 2026, 3:00 PM ET |
| Oct 1, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $82.73 ($8K), marked as a 10b5-1 plan trade. Holdings down 2% to 4,888 shares. | SEC filing Filed Oct 1, 2026, 4:00 PM ET |
| Sep 3, 2026 | Planned (10b5-1) | Peter P Sena III (CEO) sold 4,266 shares at $88.59 ($378K), marked as a 10b5-1 plan trade. Holdings down 14% to 26,935 shares. | SEC filing Filed Sep 4, 2026 |
| Sep 3, 2026 | Sale | Matthew M. Kim (Comptroller) sold 1,400 shares at $88.87 ($124K). Holdings down 22% to 4,988 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 4, 2026 |
| Sep 1, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $88.45 ($9K), marked as a 10b5-1 plan trade. Holdings down 2% to 6,400 shares. | SEC filing Filed Sep 3, 2026 |
| Aug 6, 2026 | Planned (10b5-1) | Sterling A Spainhour Jr. (EVP & CLO) sold 3,333 shares at $94.02 ($313K), marked as a 10b5-1 plan trade. Holdings down 9% to 35,219 shares. | SEC filing Filed Aug 7, 2026 |
| Aug 3, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $94.28 ($9K), marked as a 10b5-1 plan trade. Holdings down 2% to 6,488 shares. | SEC filing Filed Aug 4, 2026 |
| Jul 1, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $95.77 ($10K), marked as a 10b5-1 plan trade. Holdings down 1% to 6,588 shares. | SEC filing Filed Jul 2, 2026 |
| Jun 1, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $91.16 ($9K), marked as a 10b5-1 plan trade. Holdings down 1% to 6,688 shares. | SEC filing Filed Jun 1, 2026 |
| May 1, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 100 shares at $96.57 ($10K), marked as a 10b5-1 plan trade. Holdings down 1% to 6,788 shares. | SEC filing Filed May 4, 2026 |
| Mar 30, 2026 | Planned (10b5-1) | Greene Kimberly S (CEO) sold 25,000 shares at $96.67 ($2.4M), marked as a 10b5-1 plan trade. Holdings down 19% to 103,602 shares. | SEC filing Filed Mar 31, 2026 |
| Mar 19, 2026 | Sale | Christopher Cummiskey (EVP) sold 6,669 shares at $96.55 ($644K). Holdings down 18% to 30,800 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Mar 18, 2026 | Planned (10b5-1) | Stan W Connally (President / COO) sold 12,500 shares at $97.13 ($1.2M), marked as a 10b5-1 plan trade. Holdings down 7% to 161,481 shares. | SEC filing Filed Mar 19, 2026 |
| Feb 24, 2026 | Planned (10b5-1) | Matthew M. Kim (Comptroller) sold 5,123 shares at $95.15 ($487K), marked as a 10b5-1 plan trade. Holdings down 43% to 6,888 shares. | SEC filing Filed Feb 25, 2026 |
86 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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