SOUTHERN CO — Form 8-K

Southern Company adopted amended and restated bylaws effective October 20, 2026. Key changes include: (1) raising the stockholder threshold to call special meetings from unspecified prior level to 10% of outstanding shares held for ≥1 year; (2) expanding stockholder proxy access eligibility to 3% ownership held ≥3 years (up to 20 stockholders in a group) with up to 20% of board seats available; (3) adding detailed procedures for stockholder-requested special meetings, director nominations, and proxy solicitations; (4) clarifying bylaws regarding virtual meetings, notice requirements, and voting procedures. No specific dollar amounts, share counts, or named counterparties are disclosed—this is a governance document revision.