Greene Kimberly S, 4

What Happened
Kimberly S. Greene, Chairman, President & CEO of Southern Co (SO), had performance- and restricted-stock units vest on Feb 11, 2026. She acquired 51,855 shares from the 2023–2025 performance share award and 3,350 shares from the first 1/3 vesting of 2025 restricted stock units (total acquired = 55,205 shares at $0.00 per share as awards). To satisfy tax withholding, 23,097 shares and 1,651 shares were withheld/sold at $90.86 per share, yielding $2,098,593 and $150,010 respectively (total ≈ $2,248,603). The filing also reports a settlement/disposition of 3,240 derivative units (no cash reported).

Key Details

• Transaction date: Feb 11, 2026; Form 4 filed Feb 13, 2026 (timely).
• Awards vested: 51,855 (performance share units) + 3,350 (first 1/3 of restricted stock units) = 55,205 shares acquired at $0.00.
• Tax withholding/sales: 23,097 shares @ $90.86 = $2,098,593; 1,651 shares @ $90.86 = $150,010; total ≈ $2,248,603.
• Derivative settlement: 3,240 shares reported as disposed/settled (reported at $0.00).
• Shares owned after transaction: not specified in the provided excerpt of the filing.
• Footnotes: Committee certified performance on Feb 11, 2026 (F1); withholding to satisfy state/federal tax obligations (F2); the 3,350 shares relate to first 1/3 vesting of 2025 restricted stock units and include dividend equivalents (F3–F4). Remaining RSU tranches vest in 2027 and 2028.
• Filing timeliness: filed within the SEC’s two-business-day window (not late).

Context
This was primarily a vesting/award event (not an open-market purchase). The shares withheld/sold were routine tax-withholding transactions tied to vesting (common practice) rather than discretionary market sales. The derivative line reflects conversion/settlement activity tied to the awards and does not indicate a separate cash purchase.