Sena Peter P III 4

What Happened
Peter P. Sena III, Chairman, President & CEO of Southern Company (SO), had restricted and performance stock units vest in late Jan–early Feb 2026. He acquired about 3,510 shares through exercise/conversion of derivative awards (codes M) and had 1,620 shares withheld to satisfy tax withholding (code F) at $89.31 per share, producing proceeds of $144,682. The $0.00 per-share lines for the exercises indicate settlement of RSUs/PRSUs rather than a cash exercise price.

Key Details

• Transaction dates: 2026-01-31 and 2026-02-01.
• Acquisitions: 1,754 shares (1/31) and 1,756 shares (2/1) recorded as exercise/conversion of derivative instruments (M) at $0.00.
• Withheld/disposed for taxes: 840 shares (1/31) and 780 shares (2/1) at $89.31, totaling $75,020 and $69,662 respectively (combined $144,682).
• Footnotes: Vesting reflects (a) second 1/3 of restricted stock units granted Jan 31, 2024 (includes dividend equivalents) and (b) final 1/3 of performance restricted stock units granted Feb 1, 2023 (includes dividend equivalents). Shares were withheld to satisfy state and federal tax withholding requirements.
• Shares owned after transaction: Not specified in the provided filing.
• Filing timeliness: Reported period and filing date are 2026-02-03 (no late filing indicated).

Context
The M-code entries here reflect conversion/settlement of RSUs/PRSU awards (no cash exercise price) and the F-code entries are routine share withholding to cover tax obligations — not open-market sales. Such tax-withhold disposals are common when equity awards vest and do not necessarily indicate a deliberate sell decision by the insider.