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sellModerate cluster of 3

Christopher Cummiskey sold $644k of SO

EVP at SOUTHERN CO. 6,669 shares at an average of $96.55, traded Mar 19, 2026, filed Mar 19, 2026.

Warning score
55
Value
$644k
6,669 shares
Holdings after
30,800
-18% from before
From 52-week low
+17%
low $80.87, close $94.66
From 52-week high
-3%
high $97.49, as of Mar 19, 2026

Score components

  • Role
    Officer
    +15
  • Trade size
    $644k at market
    +20
  • Share of holdings sold
    Sold 18% of holdings
    +5
  • Cluster
    3 insiders selling within 14 days
    +15

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.

This signal so far: 1m -1.8%, 3m -2.5%, 6m -8.3%.

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 Mar 19, 2026: -9.0%SPY +18.9% · excess -27.8%

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 0001193125-26-115921, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 19, 2026SOpen-market sale
Southern Company Common Stock
-6,669$96.55$644k30,800Mar 19, 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%
17Weak
SOsell 210b5-1
SOUTHERN CO
Sterling A Spainhour Jr.
EVP & CLO
$313k
3,333 shares
-9%
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%

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.

Christopher Cummiskey sold $644k of SO | InsiderTell