MPLX director granted 2,246.989 common units

Breves Christine S reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 05/04/2026 - 05:04 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Breves Christine S reported acquisition or exercise transactions in this Form 4 filing.

MPLX LP director Christine S. Breves received an equity grant of 2,246.989 common units (limited partner interests) as her annual 2026 equity retainer award. The grant was reported at a price of $0.00 per unit, indicating it is compensation rather than an open-market purchase. Following this award, she directly holds a total of 14,084.446 MPLX common units.

Insider Trade Summary

Grant/Award: 2,246.989 shares

Grant/Award 1 txn

Insider Breves Christine S

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Units (Limited Partner Interests)	2,246.989	$0.00	$0.00

Holdings After Transaction: Common Units (Limited Partner Interests) — 14,084.446 shares (Direct)

Footnotes (1)

1. F1. Represents the reporting person's annual 2026 equity retainer award.

Key Figures

Equity grant size: 2,246.989 common units Grant price per unit: $0.00 per unit Holdings after grant: 14,084.446 common units

3 metrics

Equity grant size 2,246.989 common units Annual 2026 equity retainer award to director

Grant price per unit $0.00 per unit Reported transaction price for compensation grant

Holdings after grant 14,084.446 common units Total MPLX units directly held by Christine S. Breves after transaction

Key Terms

Common Units (Limited Partner Interests), annual 2026 equity retainer award, Grant, award, or other acquisition, Form 4

4 terms

Common Units (Limited Partner Interests) financial

"security_title: "Common Units (Limited Partner Interests)""

annual 2026 equity retainer award financial

"Represents the reporting person's annual 2026 equity retainer award."

Grant, award, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

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

What did MPLX (MPLX) director Christine S. Breves report in this Form 4?

Christine S. Breves reported receiving 2,246.989 MPLX common units as an annual 2026 equity retainer award. These units were granted at $0.00 per unit as director compensation, not purchased on the open market, and increase her direct holdings in the partnership.

How many MPLX common units were granted to Christine S. Breves?

She was granted 2,246.989 MPLX common units as part of her 2026 equity retainer. This award represents a non-cash compensation grant, typical for board members, and is classified as a grant, award, or other acquisition in the insider reporting framework.

What are Christine S. Breves’ total MPLX holdings after this transaction?

After the grant, Christine S. Breves directly holds 14,084.446 MPLX common units. This total reflects her position immediately following the 2,246.989-unit equity retainer award and provides context for the relative scale of the reported compensation transaction.

Was the MPLX insider transaction a market purchase or a compensation grant?

The transaction was a compensation grant, not a market purchase. The Form 4 codes it as a grant, award, or other acquisition with a $0.00 per-unit price, and a footnote explains it represents her annual 2026 equity retainer award as a director of MPLX.

Does this MPLX Form 4 indicate any insider selling activity?

No, the Form 4 only reports an acquisition of units as compensation and no dispositions. The filing shows one grant of 2,246.989 units to director Christine S. Breves, increasing her direct holdings to 14,084.446 common units without any sales or transfers disclosed.

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

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SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Breves Christine S

(Last) (First) (Middle)

C/O MPLX LP

200 E. HARDIN STREET

(Street)

FINDLAY OHIO 45840

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Units (Limited Partner Interests)	04/30/2026		A		2,246.989(1)	A	$0	14,084.446	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the reporting person's annual 2026 equity retainer award.

Remarks:

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 Christine S. Breves	05/04/2026
	** 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 4 (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 4: SEC 1474 (03-26)