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BCS

Notice of Proposed Sale · 144

The Southern Company

SONYSEEQUITYCurrent

Notice of Proposed Sale

Filed Jul 1, 2026Accepted Jul 1, 2026, 4:07 PM EDTFiling CIK 92122Accession 0001628280-26-046530
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Structured filing — 144

primary_doc.xml

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer
THE SOUTHERN COMPANY
Issuer CIK
0000092122
SEC file number
001-03526
Phone
4045065000
Person for whose account securities are to be sold
MATTHEW KIM
Relationships to issuer
OFFICER
Street
30 IVAN ALLEN JR BLVD NW
City
ATLANTA
State / country code
GA
Postal code
30308

Securities proposed for sale

Securities proposed for sale · 1 reported row
SecurityProposed unitsAggregate market valueUnits outstandingApproximate sale dateExchangeBroker / market maker
COMMON1009,5771,127,301,09807/01/2026NYSEMERRILL LYNCH

Broker / market maker — proposed row 1, entry 1

Name
MERRILL LYNCH
Street
3455 PEACHTREE RD NE
Street (continued)
SUITE 1000
City
ATLANTA
State / country code
GA
Postal code
30326

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
SecurityAcquiredNature of acquisitionAcquired fromAmount acquiredGift transactionPayment dateNature of payment
COMMON02/07/2024PERFORMANCE STOCK VESTTHE SOUTHERN COMPANY100N02/07/2024COMPENSATORY PAYMENT

Sales reported in the preceding three months

Sales reported in the preceding three months · 2 reported rows
SellerSecuritySale dateAmount soldGross proceeds
MATTHEW KIMCOMMON05/01/20261009,657
MATTHEW KIMCOMMON06/01/20261009,116

Seller — prior-sale row 1, entry 1

Name
MATTHEW KIM
Street
30 IVAN ALLEN JR BLVD NW
City
ATLANTA
State / country code
GA
Postal code
30308

Seller — prior-sale row 2, entry 1

Name
MATTHEW KIM
Street
30 IVAN ALLEN JR BLVD NW
City
ATLANTA
State / country code
GA
Postal code
30308

Prior-sale reporting

Nothing to report for the preceding three months
N

Notice signature

Notice date
07/01/2026
Signed
MATTHEW KIM
Plan adoption dates
11/25/2025

Company context

Current securities

Historical securities (2)

Recent company filings

  1. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year · Other EventsOct 22, 2026
  2. 144 filingSep 3, 2026
  3. 144 filingSep 3, 2026
  4. 144 filingSep 1, 2026
  5. 144 filingAug 6, 2026

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