Kim Matthew M. 4

What Happened

• Matthew M. Kim, Comptroller of Southern Company (SO), had restricted stock units (derivatives) convert/vest on April 1, 2026. The filing shows 82 shares were acquired via exercise/conversion and then 82 shares were delivered to the company to cover FICA withholding at $96.94 per share (total value withheld $7,949). In addition, three other derivative conversions/settlements show 13, 23 and 42 shares disposed (net-settled/withheld) at $0.

Key Details

• Transaction date: 2026-04-01; Form 4 filed: 2026-04-02 (filed the next day).
• Withholding price: $96.94 per share for the 82-share withholding (total $7,949).
• Shares acquired (conversion/vesting): 82 shares. Shares surrendered/withheld: 82 shares (for FICA) and 13 + 23 + 42 = 78 additional shares net-settled at $0.
• Footnotes: withholdings relate to FICA/tax obligations and retirement-eligibility rules; one footnote notes inclusion of 4 accrued dividend equivalent units. The underlying awards are RSUs granted Jan 31, 2024; Feb 5, 2025; and Feb 11, 2026, with vesting schedules and share withholding to satisfy income tax requirements.
• Shares owned after the transaction are not shown in the provided data.
• Filing appears timely (reported on the next business day).

Context

• These transactions reflect RSU vesting and net-share settlement/withholding to satisfy tax and FICA obligations (transaction codes M = exercise/conversion of derivative; F = payment of exercise price or tax liability). This is a routine withholding action on vested equity rather than an open-market sale or a cash purchase.