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sellWeak cluster of 210b5-1 plan

Sterling A Spainhour Jr. sold $313k of SO

EVP & CLO at SOUTHERN CO. 3,333 shares at an average of $94.02, traded Aug 6, 2026, filed Aug 7, 2026.

Warning score
17
Value
$313k
3,333 shares
Holdings after
35,219
-9% from before
From 52-week low
+12%
low $82.06, close $92.14
From 52-week high
-5%
high $97.49, as of Aug 6, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $313k at market
    +14
  • Share of holdings sold
    Sold 8.6% of holdings
    0
  • Cluster
    2 insiders selling within 14 days
    +8
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

SOOct 9, 2026 · close 86.17
Since filing Aug 7, 2026: -6.3%SPY +0.9% · excess -7.1%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001193125-26-340057, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 6, 2026SOpen-market sale
Southern Company Common Stock10b5-1
-3,333$94.02$313k35,219Aug 7, 2026

Related signals

Other insiders at SOUTHERN CO and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
0Weak
SOsell10b5-1
SOUTHERN CO
Matthew M. Kim
Comptroller
$8,273
100 shares
-2%
38Weak
SOsell 2
SOUTHERN CO
Matthew M. Kim
Comptroller
$124k
1,400 shares
-22%
34Weak
SOsell 210b5-1
SOUTHERN CO
Peter P Sena III
Chairman,President & CEO, SNC
$378k
4,266 shares
-14%
3Weak
SOsell 210b5-1
SOUTHERN CO
Matthew M. Kim
Comptroller
$8,845
100 shares
-2%
3Weak
SOsell 210b5-1
SOUTHERN CO
Matthew M. Kim
Comptroller
$9,428
100 shares
-2%
0Weak
SOsell10b5-1
SOUTHERN CO
Matthew M. Kim
Comptroller
$9,577
100 shares
-1%
0Weak
SOsell10b5-1
SOUTHERN CO
Matthew M. Kim
Comptroller
$9,116
100 shares
-1%
0Weak
SOsell10b5-1
SOUTHERN CO
Matthew M. Kim
Comptroller
$9,657
100 shares
-1%
50Moderate
SOsell 310b5-1
SOUTHERN CO
Greene Kimberly S
Chairman, President & CEO, GPC
$2.4M
25,000 shares
-19%
40Moderate
SOsell 310b5-1
SOUTHERN CO
Stan W Connally
EVP & COO
$1.2M
12,500 shares
-7%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Sterling A Spainhour Jr. sold $313k of SO | InsiderTell