Form 4: Director Frank Semple Acquires MPLX LP Units

MPLX LP Director Frank M. Semple acquired 1,132.302 common units, increasing his direct beneficial ownership.

Summary

• Frank M. Semple, a Director of MPLX GP LLC (the general partner of MPLX LP), acquired 1,132.302 common units of MPLX LP.
• The transaction occurred on November 14, 2025, and was reported on November 18, 2025.
• The acquisition was made at a price of $0 per unit, typically indicating a grant or award.
• Following this transaction, Semple directly owns 57,100.516 common units.
• Semple also indirectly beneficially owns 333,337 units through the Frank M Semple Revocable Trust, 111,180 units through the Robin Y Semple 2012 Dynasty Trust, and 48,777 units through EK Holdings LLC.

Sentiment

Score: 7

Explanation: The acquisition of additional common units by a director, even at a $0 price (suggesting a grant or award), typically signals confidence in the company's future performance and aligns management's interests with shareholders.

Positives

• A director increasing their stake in the company can be seen as a positive signal of confidence in the company's future performance.

Future Outlook

NA

Management Comments

• The Reporting Person is a Director of MPLX GP LLC, the general partner of the Issuer.
• The Issuer is managed by the directors and executive officers of MPLX GP LLC.

Industry Context

Insider transactions, such as a director increasing their stake, are often viewed by the market as a signal of management's confidence in the company's prospects, which can be particularly relevant in the energy midstream sector where long-term asset stability and cash flows are key.

Related Party Transactions

• Frank M. Semple indirectly beneficially owns 333,337 common units through the Frank M Semple Revocable Trust.
• Frank M. Semple indirectly beneficially owns 111,180 common units through the Robin Y Semple 2012 Dynasty Trust.
• Frank M. Semple indirectly beneficially owns 48,777 common units through EK Holdings LLC.

Stakeholder Impact

• Shareholders: May view the director's increased stake as a positive sign of confidence, potentially influencing investor sentiment.

Key Dates

Recommendation

The acquisition of common units by a director, even if a grant, generally indicates management's confidence in the company's long-term prospects. This aligns the director's interests with shareholders and can be a positive signal. However, a single insider transaction, without additional financial or strategic context, is usually not sufficient to warrant a 'buy' or 'sell' recommendation. It reinforces a 'hold' position for existing investors and suggests further due diligence for potential investors.

Keywords

MPLX LP, MPLX, Frank M. Semple, Director, Insider Transaction, Form 4, Common Units, Equity Acquisition, Beneficial Ownership