Shawn M. Lyon, Senior Vice President, Logistics and Storage of MPLX GP LLC, filed a Form 4 with the SEC on August 17, 2026, reporting the sale of 2,500 shares of Marathon Petroleum Corp common stock on August 13, 2026.

Key Highlights

  • Shares sold: Shawn M. Lyon disposed of 2,500 shares of Marathon Petroleum Corp common stock on August 13, 2026.
  • Sale price: The transaction was executed at $350 per share, coded as a sale (S).
  • Remaining direct ownership: Following the transaction, Lyon directly holds 12,619 shares of common stock.
  • Indirect holdings: Lyon also holds 2,938.762 shares indirectly through a 401(k) Plan, including 11.168 shares acquired via dividend reinvestment not previously reported under Rule 16a-11, net of a 0.018-share administrative fee deduction.
  • Reporting person role: Lyon is identified as Senior Vice President, Logistics and Storage of MPLX GP LLC, a subsidiary of the issuer.
  • Signatory: The form was signed by Molly R. Benson as Attorney-in-Fact for Shawn M. Lyon on August 17, 2026.

Shawn M. Lyon's Share Disposition and Beneficial Ownership at Marathon Petroleum

According to the Form 4 filed with the SEC on August 17, 2026, Shawn M. Lyon reported a single open-market sale of 2,500 shares of Marathon Petroleum Corp (NYSE:MPC) common stock on August 13, 2026, at a price of $350 per share. The transaction is coded "S" in Table I of the filing, indicating a sale of directly held securities.

Following the reported transaction, Lyon's direct beneficial ownership stands at 12,619 shares of common stock, according to the filing. In addition, the filing reports indirect ownership of 2,938.762 shares held through a 401(k) Plan. The filing notes that this indirect figure includes 11.168 shares acquired through dividend reinvestment that were not previously reported pursuant to Rule 16a-11, and also reflects the deduction of 0.018 shares representing an administrative fee.

The filing identifies Lyon as the Senior Vice President, Logistics and Storage of MPLX GP LLC, described as a subsidiary of Marathon Petroleum Corp. No derivative securities transactions were reported in Table II. The form was submitted as an individual filing by one reporting person and was signed by Molly R. Benson as Attorney-in-Fact for Shawn M. Lyon.

What Was Disclosed

The filing discloses a sale of 2,500 shares of Marathon Petroleum Corp common stock at $350 per share by SVP Shawn M. Lyon on August 13, 2026, leaving Lyon with 12,619 shares directly and 2,938.762 shares indirectly via a 401(k) Plan.