MPLX LP: Micheal G. Dunn reports 0 direct common units

MPLX LP reported a direct holding of 0 common units (limited partner interests) for Micheal G. Dunn, a director of its general partner, MPLX GP LLC, as of November 1, 2026.

Available on EDGAR 11/02/2026 - 04:29 PM EST Accepted by SEC EDGAR 11/02/2026 - 04:29 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

MPLX LP reported a direct holding of 0 common units (limited partner interests) for Micheal G. Dunn, a director of its general partner, MPLX GP LLC, as of November 1, 2026.

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Dunn Micheal G.

Role Director

Type	Security	Shares	Price	Value
Holding	Common Units (Limited Partner Interests)	--	--	--

Holdings: Common Units (Limited Partner Interests) — 0 shares (Direct)

Key Figures

Direct common units held: 0 common units

1 metrics

Direct common units held 0 common units Reported November 1, 2026

Key Terms

Common Units (Limited Partner Interests), general partner

2 terms

Common Units (Limited Partner Interests) financial

"Common Units (Limited Partner Interests)"

general partner financial

"MPLX GP LLC, the general partner of the Issuer"

A general partner is the person or firm that runs an investment partnership and legally represents it — they make the day-to-day decisions, choose which assets to buy or sell, and are responsible for the partnership’s obligations. Investors care because the general partner’s judgment, risk-taking and fee and profit-sharing arrangements determine both the potential returns and the level of exposure to losses; think of the GP as the ship’s captain whose skill and honesty shape the voyage’s outcome.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many MPLX common units does Micheal G. Dunn report holding?

Micheal G. Dunn reported direct holdings of 0 common units (limited partner interests) as of November 1, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Dunn Micheal G.

(Last) (First) (Middle)

C/O MPLX LP

200 E. HARDIN STREET

(Street)

FINDLAY OHIO 45840

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
11/01/2026

3. Issuer Name and Ticker or Trading Symbol
MPLX LP [ MPLX ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Units (Limited Partner Interests)	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit List: Exhibit 24 Power of Attorney; 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.

	/s/ Molly R. Benson, Attorney-in-Fact for Micheal G. Dunn	11/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)