Form 4: MPLX Executive Reports Tax-Related Unit Sale

MPLX LP's Chief Legal Officer, Molly R. Benson, reported the disposition of 306 common units for tax purposes at $54.85 per unit.

Summary

• Molly R. Benson, Chief Legal Officer and Corporate Secretary of MPLX GP LLC (the general partner of MPLX LP), reported a change in beneficial ownership.
• The transaction involved the disposition of 306 Common Units (Limited Partner Interests) of MPLX LP.
• The disposition occurred on December 12, 2025, at a price of $54.85 per unit.
• The transaction code 'F' indicates that these units were disposed of for the payment of tax liability incident to the receipt, exercise, or vesting of a security.
• Following this transaction, Molly R. Benson beneficially owns 40,163 Common Units directly.

Sentiment

Score: 5

Explanation: The transaction is a routine, non-discretionary disposition of shares for tax purposes, which is generally considered neutral in terms of company sentiment.

Negatives

• The disposition of 306 common units, even for tax purposes, results in a slight reduction in the direct beneficial ownership of the company's equity by a key executive.

Future Outlook

The filing does not contain any forward-looking statements or guidance regarding the company's future performance or outlook.

Industry Context

This Form 4 filing is a routine disclosure of an insider transaction and does not provide broader industry context or trends. It reflects an individual executive's equity activity within MPLX LP.

Stakeholder Impact

• Shareholders: A minor reduction in direct insider ownership, which is a common occurrence for tax purposes upon equity award vesting.

Key Dates

Keywords

MPLX, Form 4, Insider Transaction, Beneficial Ownership, Common Units, Molly Benson, Tax Withholding