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Southern Co. planned insider sales

In the twelve months since 23 September 2025 insiders at Southern Co. filed 13 Form 144 notices of planned sales, 64,997 shares worth $6.2 million at the time of filing, from 9 sellers. The latest, filed 3 September 2026: Matthew Kim (officer), 1,400 shares worth $124,418, planned for around 3 September 2026 through Merrill Lynch.

FiledSellerRelationshipSharesValuePlanned saleBrokerHow acquiredFiling
3 September 2026Matthew KimOfficer1,400$124,4183 September 2026Merrill LynchPerformance Stock Vest; Restricted Stock Unit VestForm 144
3 September 2026Peter P Sena IiiOfficer4,266$377,9253 September 2026Merrill LynchRESTRICTED STOCK UNIT VESTForm 144
1 September 2026Matthew KimOfficer100$8,8451 September 2026MERRILL LYNCHPERFORMANCE STOCK VESTForm 144
6 August 2026Sterling SpainhourOfficer3,333$313,3696 August 2026MERRILL LYNCHPERFORMANCE STOCK VESTForm 144
3 August 2026Matthew KimOfficer100$9,4283 August 2026Merrill LynchPerformance Stock VestForm 144
1 July 2026Matthew KimOfficer100$9,5771 July 2026MERRILL LYNCHPERFORMANCE STOCK VESTForm 144
1 June 2026Matthew M. KimOfficer100$9,1161 June 2026Merrill LynchPerformance Stock Unit VestForm 144
1 May 2026Matthew KimOfficer100$9,6571 May 2026Merrill LynchPerformance Stock Unit VestForm 144
30 March 2026Kimberly GreeneOfficer25,000$2.4 million30 March 2026MERRILL LYNCHDIVIDEND REINVESTMENT; PERFORMANCE STOCK UNIT VEST; RESTRICTED STOCK UNIT VESTForm 144
19 March 2026Christopher CummiskeyOfficer6,669$643,89219 March 2026Merrill LynchPERFORMANCE STOCK UNIT VEST; RESTRICTED STOCK UNIT VESTForm 144
18 March 2026Stanley ConnallyOfficer12,500$1.2 million18 March 2026Merrill LynchPERFORMANCE STOCK UNIT VEST; RESTRICTED STOCK UNIT VESTForm 144
24 February 2026Matthew M. KimOfficer5,123$487,45324 February 2026Merrill LynchOpen Market Purchase; Performance Stock Unit Vest; Restricted Stock Unit VestForm 144
30 September 2025Bryan AndersonOfficer6,206$582,30930 September 2025MERRILL LYNCHPERFORMANCE STOCK UNIT VEST; RESTRICTED STOCK VEST (S)Form 144

A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was. Value is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.

Source

Form 144 filings on EDGAR for Southern Co.: the company's filing index, each notice read from its own XML.

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