A Form 4 statement of changes in beneficial ownership was filed on August 4, 2026, disclosing a sale of Southern Company common stock by the company's Comptroller, Matthew M. Kim, pursuant to a Rule 10b5-1(c) written plan.

Key Highlights

  • Reporting person: Matthew M. Kim, Comptroller of Southern Company, listed on NYSE.
  • Transaction: Sale (code S) of 100 shares of Southern Company Common Stock on August 3, 2026.
  • Sale price: $94.28 per share, disposed of (D).
  • Direct beneficial ownership after transaction: 6,488 shares held directly.
  • Indirect beneficial ownership: 1,222.207 shares held indirectly through a 401(k) plan.
  • 10b5-1 plan: The filing indicates the transaction was made pursuant to a contract, instruction, or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Matthew M. Kim's Share Sale and Beneficial Ownership at Southern Company

According to the filing, Matthew M. Kim, serving as Comptroller of Southern Company (listed on NYSE), sold 100 shares of Southern Company Common Stock on August 3, 2026, at a price of $94.28 per share. The filing indicates the transaction was a disposal (D) and was executed under a Rule 10b5-1(c) written plan, as indicated by the box checked on the form.

Following the reported transaction, the filing discloses that Kim directly holds 6,488 shares of Southern Company Common Stock. In addition, the filing reports an indirect beneficial ownership of 1,222.207 shares, held through a 401(k) plan. No derivative securities transactions were reported in Table II of the filing.

The Form 4 was signed on August 4, 2026, by Brittney Anderson as Attorney-in-Fact for Matthew M. Kim, and was filed pursuant to Section 16(a) of the Securities Exchange Act of 1934. The date of the earliest transaction reported is August 3, 2026.

What Was Disclosed

The filing discloses a single open-market sale of 100 shares of Southern Company Common Stock by the company's Comptroller at $94.28 per share on August 3, 2026, conducted under a Rule 10b5-1(c) plan, with resulting direct ownership of 6,488 shares.