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Southern Company Officer Peter P. Sena III Sells $378K in Common Stock Under Rule 10b5-1 Plan

Low SignificanceSeptember 4, 2026 at 1:08:15 PM EDT

SOUTHERN CO

$SO4CIK: 0000092122

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Filing Summary

Southern Co ($SO) Insider: Peter P. Sena III (Chairman, President & CEO, SNC) Action: Open Market Sale Details: 4,266 shares @ $88.59 ($377,924.94 total value) Shares Held Post-Transaction: 26,935 shares Filing Date: 2026-09-04 | Rule 10b5-1: Yes

Comprehensive Analysis

Executive Summary

On September 3, 2026, Peter P. Sena III, Chairman, President & CEO of Southern Nuclear Operating Company (SNC), executed an open-market sale of 4,266 shares of The Southern Company ($SO) common stock at an average price of $88.59 per share, totaling approximately $377,925.

Transaction Breakdown

  • Security: Southern Company Common Stock
  • Transaction Code: S (Open market sale)
  • Volume: 4,266 shares
  • Price: $88.59 per share
  • Total Gross Proceeds: $377,924.94
  • Remaining Direct Ownership: 26,935 shares
  • Trading Plan: Executed under a Rule 10b5-1 trading arrangement (indicated by affirmative flag).

Impact & Market Context

The transaction reduced Sena's direct holdings by approximately 13.7%. Because the sale was executed pursuant to a pre-arranged Rule 10b5-1 plan and represents a moderate dollar amount, it carries low overall market significance and reflects standard executive portfolio diversification rather than a discretionary sentiment shift.

Topics:#SO#SouthernCo#InsiderTrading#SECForm4#Utilities

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