The Southern Company (SO) Insider Trading

Last 12 months

Insiders sold $5.63M and bought nothing on the open market.

86% of the selling was scheduled in advance under 10b5-1 plans. EVP Christopher Cummiskey sold $644k on Mar 19, 15% of their stake, outside a plan. The last open-market buy by an executive or director was in Aug 2020.

Net open-market

−$5.63M

0 buys · 13 sales

Under a 10b5-1 plan

86%

of the value sold

Insiders who bought / sold

0 / 6

executives and directors

Last open-market buy

Aug 2020

Aug 12, 2020

Get an email when SO's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 1	Matthew M. Kim Comptroller	Sold10b5-1 plan	100	$82.73	$8k	1.6%	Form 4
Sep 3	Peter P Sena III Chairman,President & CEO, SNC	Sold10b5-1 plan	4,266	$88.59	$378k	14%	Form 4
Sep 3	Matthew M. Kim Comptroller	SoldNo plan	1,400	$88.87	$124k	18%	Form 4
Sep 1	Matthew M. Kim Comptroller	Sold10b5-1 plan	100	$88.45	$9k	1.3%	Form 4
Aug 6	Sterling A Spainhour Jr. EVP & CLO	Sold10b5-1 plan	3,333	$94.02	$313k	8.4%	Form 4
Aug 3	Matthew M. Kim Comptroller	Sold10b5-1 plan	100	$94.28	$9k	1.3%	Form 4
Jul 1	Matthew M. Kim Comptroller	Sold10b5-1 plan	100	$95.77	$10k	1.3%	Form 4
Jun 1	Matthew M. Kim Comptroller	Sold10b5-1 plan	100	$91.16	$9k	1.2%	Form 4
May 1	Matthew M. Kim Comptroller	Sold10b5-1 plan	100	$96.57	$10k	1.2%	Form 4
Mar 30	Kimberly S Greene Chairman, President & CEO, GPC	Sold10b5-1 plan	25,000	$96.67	$2.42M	19%	Form 4
Mar 19	Christopher Cummiskey EVP	SoldNo plan	6,669	$96.55	$644k	15%	Form 4
Mar 18	Stan W Connally EVP & COO	Sold10b5-1 plan	12,500	$97.13	$1.21M	6.6%	Form 4
Feb 24	Matthew M. Kim Comptroller	Sold10b5-1 plan	5,123	$95.15	$487k	39%	Form 4
Sep 30, 2025	Bryan D Anderson EVP	Sold10b5-1 plan	6,206	$93.83	$582k	11%	Form 4
Aug 11, 2025	Sterling A Spainhour Jr. EVP & CLO	Sold10b5-1 plan	2,380	$95.02	$226k	9.0%	Form 4
Jul 21, 2025	Kimberly S Greene Chairman, President & CEO, GPC	Sold10b5-1 plan	13,158	$95.00	$1.25M	12%	Form 4
May 23, 2025	Christopher Cummiskey EVP	Sold10b5-1 plan	12,335	$89.54	$1.1M	30%	Form 4
Mar 31, 2025	Stan W Connally EVP & COO	Sold10b5-1 plan	12,500	$92.24	$1.15M	7.1%	Form 4
Mar 10, 2025	Kimberly S Greene Chairman, President & CEO, GPC	Sold10b5-1 plan	32,190	$93.12	$3M	23%	Form 4
Mar 3, 2025	Christopher C Womack Chairman, President & CEO	Sold10b5-1 plan	24,407	$90.13	$2.2M	21%	Form 4
Mar 3, 2025	Martin Bernard Davis EVP & CIO	Sold10b5-1 plan	1,125	$89.61	$101k	1.1%	Form 4
Feb 25, 2025	Christopher C Womack Chairman, President & CEO	Sold10b5-1 plan	1,593	$90.00	$143k	1.4%	Form 4
Feb 19, 2025	Christopher Cummiskey EVP	Sold10b5-1 plan	944	$86.00	$81k	2.3%	Form 4
Feb 11, 2025	James Jeffrey Peoples Chairman, President & CEO, APC	Sold10b5-1 plan	14,540	$86.00	$1.25M	40%	Form 4
Feb 4, 2025	Christopher Cummiskey EVP & CCO	Sold10b5-1 plan	837	$83.32	$70k	2.9%	Form 4
Dec 5, 2024	Martin Bernard Davis EVP and CIO	Sold10b5-1 plan	1,170	$85.90	$101k	1.3%	Form 4
Dec 5, 2024	Christopher C Womack CEO, President and Chairman	Sold10b5-1 plan	14,000	$86.18	$1.21M	15%	Form 4
Nov 4, 2024	Sterling A Spainhour Jr. EVP, Chief Legal Officer & CCO	Sold10b5-1 plan	793	$88.54	$70k	4.3%	Form 4

Oct 110b5-1 plan
Matthew M. Kim
Comptroller · sold 100 at $82.73
$8k
1.6% of stake
Sep 310b5-1 plan
Peter P Sena III
Chairman,President & CEO, SNC · sold 4,266 at $88.59
$378k
14% of stake
Sep 3No plan
Matthew M. Kim
Comptroller · sold 1,400 at $88.87
$124k
18% of stake
Sep 110b5-1 plan
Matthew M. Kim
Comptroller · sold 100 at $88.45
$9k
1.3% of stake
Aug 610b5-1 plan
Sterling A Spainhour Jr.
EVP & CLO · sold 3,333 at $94.02
$313k
8.4% of stake
Aug 310b5-1 plan
Matthew M. Kim
Comptroller · sold 100 at $94.28
$9k
1.3% of stake
Jul 110b5-1 plan
Matthew M. Kim
Comptroller · sold 100 at $95.77
$10k
1.3% of stake
Jun 110b5-1 plan
Matthew M. Kim
Comptroller · sold 100 at $91.16
$9k
1.2% of stake
May 110b5-1 plan
Matthew M. Kim
Comptroller · sold 100 at $96.57
$10k
1.2% of stake
Mar 3010b5-1 plan
Kimberly S Greene
Chairman, President & CEO, GPC · sold 25,000 at $96.67
$2.42M
19% of stake
Mar 19No plan
Christopher Cummiskey
EVP · sold 6,669 at $96.55
$644k
15% of stake
Mar 1810b5-1 plan
Stan W Connally
EVP & COO · sold 12,500 at $97.13
$1.21M
6.6% of stake
Feb 2410b5-1 plan
Matthew M. Kim
Comptroller · sold 5,123 at $95.15
$487k
39% of stake
Sep 30, 202510b5-1 plan
Bryan D Anderson
EVP · sold 6,206 at $93.83
$582k
11% of stake
Aug 11, 202510b5-1 plan
Sterling A Spainhour Jr.
EVP & CLO · sold 2,380 at $95.02
$226k
9.0% of stake
Jul 21, 202510b5-1 plan
Kimberly S Greene
Chairman, President & CEO, GPC · sold 13,158 at $95.00
$1.25M
12% of stake
May 23, 202510b5-1 plan
Christopher Cummiskey
EVP · sold 12,335 at $89.54
$1.1M
30% of stake
Mar 31, 202510b5-1 plan
Stan W Connally
EVP & COO · sold 12,500 at $92.24
$1.15M
7.1% of stake
Mar 10, 202510b5-1 plan
Kimberly S Greene
Chairman, President & CEO, GPC · sold 32,190 at $93.12
$3M
23% of stake
Mar 3, 202510b5-1 plan
Christopher C Womack
Chairman, President & CEO · sold 24,407 at $90.13
$2.2M
21% of stake
Mar 3, 202510b5-1 plan
Martin Bernard Davis
EVP & CIO · sold 1,125 at $89.61
$101k
1.1% of stake
Feb 25, 202510b5-1 plan
Christopher C Womack
Chairman, President & CEO · sold 1,593 at $90.00
$143k
1.4% of stake
Feb 19, 202510b5-1 plan
Christopher Cummiskey
EVP · sold 944 at $86.00
$81k
2.3% of stake
Feb 11, 202510b5-1 plan
James Jeffrey Peoples
Chairman, President & CEO, APC · sold 14,540 at $86.00
$1.25M
40% of stake
Feb 4, 202510b5-1 plan
Christopher Cummiskey
EVP & CCO · sold 837 at $83.32
$70k
2.9% of stake
Dec 5, 202410b5-1 plan
Martin Bernard Davis
EVP and CIO · sold 1,170 at $85.90
$101k
1.3% of stake
Dec 5, 202410b5-1 plan
Christopher C Womack
CEO, President and Chairman · sold 14,000 at $86.18
$1.21M
15% of stake
Nov 4, 202410b5-1 plan
Sterling A Spainhour Jr.
EVP, Chief Legal Officer & CCO · sold 793 at $88.54
$70k
4.3% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch SO, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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