Southern (SO) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.
The Southern Company (SO) insider buying and selling: no purchases, 14 sales
124 Form 4 Table I transactions filed with the SEC by The Southern Company insiders between 2025-10-01 and 2026-10-01 (15-month history): 0 open-market purchases and 14 sales, plus 110 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $2.4M by Greene Kimberly S, on 2026-03-30.
Southern insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Southern insiders filed 13 sales worth $5.6M on the open market, and no purchases.
The biggest seller was Greene Kimberly S, (Chairman, President & CEO, GPC): $2.4M in 1 sale, out of 6 different sellers.
The largest trade of the period was a sale of $2.4M on Mar 30, 2026, by Greene Kimberly S, (Chairman, President & CEO, GPC), under a 10b5-1 plan. Form 4 on sec.gov (0001193125-26-134334).
Of the 13 sales, 11 (85%, $4.9M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 2 do not.
The last three months show 6 sales, against 3 in the three before. The latest sale from Oct 1, 2026.
Against its sector (Utilities, 31 companies with an insider page on this site), over the same dates the median is 5 sales and 0 purchases on the open market. Southern has more sales than 23 of the other 30, ranks 10 of 31 by net dollars sold, and 11 of the 31 have at least one purchase.
The 20 most important trades
With no open-market purchases, the table starts with SO's sales, largest first. The full history is in the tool above, already searched.
See all 124 SO trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-03-30 | 2026-03-31 | Greene Kimberly S, | Chairman, President & CEO, GPC | $2.4M | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-03-18 | 2026-03-19 | Connally Stan W | EVP & COO | $1.2M | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-03-19 | 2026-03-19 | Cummiskey Christopher | EVP | $644k | S — Open-market sale | SEC |
| 2025-09-30 | 2025-10-01 | Anderson Bryan D | EVP | $582k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-02-24 | 2026-02-25 | Kim Matthew M. | Comptroller | $487k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-09-03 | 2026-09-04 | Sena Peter P Iii | Chairman, President & CEO, SNC | $378k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-08-06 | 2026-08-07 | Spainhour Sterling A Jr. | EVP & CLO | $313k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-09-03 | 2026-09-04 | Kim Matthew M. | Comptroller | $124k | S — Open-market sale | SEC |
| 2026-05-01 | 2026-05-04 | Kim Matthew M. | Comptroller | $10k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-07-01 | 2026-07-02 | Kim Matthew M. | Comptroller | $10k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-08-03 | 2026-08-04 | Kim Matthew M. | Comptroller | $9k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-06-01 | 2026-06-01 | Kim Matthew M. | Comptroller | $9k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-09-01 | 2026-09-03 | Kim Matthew M. | Comptroller | $9k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-10-01 | 2026-10-01 | Kim Matthew M. | Comptroller | $8k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-02-16 | 2026-02-17 | Womack Christopher C | Chairman, President & CEO | $7.9M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld to satisfy required state and federal tax withholding requirements. | SEC |
| 2026-02-11 | 2026-02-13 | Greene Kimberly S, | Chairman, President & CEO, GPC | $2.2M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld to satisfy required state and federal tax withholding requirements. | SEC |
| 2026-02-11 | 2026-02-13 | Kerr, Ii James Y | Chairman, President & CEO, GAS | $1.9M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld to satisfy required state and federal tax withholding requirements. | SEC |
| 2026-02-11 | 2026-02-13 | Peoples James Jeffrey | Chairman, President & CEO, APC | $1.8M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld to satisfy required state and federal tax withholding requirements. | SEC |
| 2026-02-11 | 2026-02-13 | Connally Stan W | EVP & COO | $1.8M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld to satisfy required state and federal tax withholding requirements. | SEC |
| 2026-02-11 | 2026-02-13 | Spainhour Sterling A Jr. | EVP & CLO | $1.3M | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Shares withheld to satisfy required state and federal tax withholding requirements. | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Oct 1, 2025 and Oct 1, 2026 there is not one open-market purchase of The Southern Company: 14 sales worth $6.2M and zero dollars bought.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like The Southern Company's is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| F | Tax withholding (shares surrendered for taxes) | 47 | $25.2M |
| M | Option exercise | 46 | $0 |
| S | Open-market sale | 14 | $6.2M |
| A | Grant or award | 13 | $0 |
| G | Gift | 3 | $0 |
| I | Discretionary transaction in a plan | 1 | $618k |
| Total | Everything filed in the period | 124 | $32.0M |
62 of the 124 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 14 distinct people or entities have filed The Southern Company transactions: none bought on the open market and 7 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
Of the 7 who sold on the open market (14 sales in all), the three biggest sellers account for $4.3M of the $6.2M: 69% of the money in three people.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Greene Kimberly S, | Chairman, President & CEO, GPC | 8 | — | $2.4M (1) | 2026-03-31 |
| Connally Stan W | EVP & COO | 9 | — | $1.2M (1) | 2026-03-19 |
| Kim Matthew M. | Comptroller | 18 | — | $667k (8) | 2026-10-01 |
| Cummiskey Christopher | EVP | 8 | — | $644k (1) | 2026-03-19 |
| Anderson Bryan D | EVP | 8 | — | $582k (1) | 2026-02-13 |
| Sena Peter P Iii | Chairman, President & CEO, SNC | 10 | — | $378k (1) | 2026-09-04 |
| Spainhour Sterling A Jr. | EVP & CLO | 9 | — | $313k (1) | 2026-08-07 |
| Poroch David P. | EVP & CFO | 11 | — | — | 2026-02-13 |
Shown here are the 8 who moved the most money, out of 14. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Mar 2026: 0 purchases and 3 sales, worth $4.3M. 6 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 1 | $582k |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 1 | $487k |
| Mar 2026 | 0 | $0 | 3 | $4.3M |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 0 | $0 | 1 | $10k |
| Jun 2026 | 0 | $0 | 1 | $9k |
| Jul 2026 | 0 | $0 | 1 | $10k |
| Aug 2026 | 0 | $0 | 2 | $323k |
| Sep 2026 | 0 | $0 | 3 | $511k |
| Oct 2026 | 0 | $0 | 1 | $8k |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
The Southern Company (SO) analysis page →
Other Utilities companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
12 of the 14 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. Southern has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Oct 1, 2026, and a Form 4 arrives up to two business days after the trade.
6 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.