MPLX (MPLX) director receives 2,579.543-unit 2026 equity retainer award

Rhea-AI Filing Summary

STICE J MICHAEL reported acquisition or exercise transactions in this Form 4 filing.

MPLX LP director J. Michael Stice received an equity grant of 2,579.543 Common Units (Limited Partner Interests) on an award valued at $0.0000 per unit. This represents his annual 2026 equity retainer award. Following the grant, he directly holds 55,874.697 common units and indirectly holds 700 common units through The Mike Stice Trust.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider STICE J MICHAEL

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Units (Limited Partner Interests)	2,579.543	$0.00	--
holding	Common Units (Limited Partner Interests)	--	--	--

Holdings After Transaction: Common Units (Limited Partner Interests) — 55,874.697 shares (Direct, null); Common Units (Limited Partner Interests) — 700 shares (Indirect, The Mike Stice Trust)

Footnotes (1)

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Key Figures

Equity units granted: 2,579.543 units Grant price per unit: $0.0000 per unit Direct holdings after grant: 55,874.697 units +2 more

5 metrics

Equity units granted 2,579.543 units Annual 2026 equity retainer award

Grant price per unit $0.0000 per unit Price for 2,579.543-unit equity award

Direct holdings after grant 55,874.697 units Common units held directly after transaction

Indirect holdings 700.0000 units Common units held via The Mike Stice Trust

Acquire transactions 1 transaction Grant/award acquisition in transaction summary

Key Terms

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

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."

indirect ownership financial

"700.0000 units reported as indirect ownership through The Mike Stice Trust"

Grant, award, or other acquisition financial

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

Form 4 Insider Transactions: What Each Field Means →

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^*

STICE J MICHAEL

(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		2,579.543(1)	A	$0	55,874.697	D
Common Units (Limited Partner Interests)								700	I	The Mike Stice Trust

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 J. Michael Stice	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)

FAQ

What insider transaction did MPLX (MPLX) director J. Michael Stice report?

Director J. Michael Stice reported receiving an equity grant of 2,579.543 MPLX common units. The units were awarded at $0.0000 per unit as part of his annual 2026 equity retainer, reflecting compensation rather than an open-market purchase or sale.

How many MPLX units does J. Michael Stice hold after this Form 4 filing?

After the reported grant, J. Michael Stice directly holds 55,874.697 MPLX common units. In addition, The Mike Stice Trust holds 700 common units indirectly, giving visibility into both his direct and trust-related ownership positions as disclosed in the filing.

Was the MPLX equity grant to J. Michael Stice an open-market purchase?

No, the Form 4 shows a grant of 2,579.543 MPLX common units at $0.0000 per unit. The transaction code indicates a grant or award, and the footnote clarifies it is his annual 2026 equity retainer award, not an open-market purchase.

What does the footnote in J. Michael Stice’s MPLX Form 4 explain?

The footnote explains that the 2,579.543 MPLX common units reported represent J. Michael Stice’s annual 2026 equity retainer award. This clarifies the transaction is compensation-related, distinguishing it from discretionary buying or selling activity in the open market.

How is indirect ownership reported for J. Michael Stice in MPLX units?

The Form 4 reports 700 MPLX common units as indirectly owned through The Mike Stice Trust. This indirect entry is categorized as a holding record, providing transparency into trust-held units associated with the director, alongside his larger directly held position.