Equity grant boosts MPLX (MPLX) director J. Michael Stice’s unit holdings

Rhea-AI Filing Summary

MPLX LP director J. Michael Stice reported an equity award of 1,098.213 common units. The units were acquired at a reported price of $0.00 per unit as a grant or award, bringing his directly held common units to 56,972.910. He also reports indirect ownership of 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)	1,098.213	$0.00	--
holding	Common Units (Limited Partner Interests)	--	--	--

Holdings After Transaction: Common Units (Limited Partner Interests) — 56,972.91 shares (Direct, null); Common Units (Limited Partner Interests) — 700 shares (Indirect, The Mike Stice Trust)

Footnotes (1)

Key Figures

Units granted: 1,098.213 units Grant price: $0.00 per unit Direct holdings after grant: 56,972.910 units +1 more

4 metrics

Units granted 1,098.213 units Equity award on May 15, 2026

Grant price $0.00 per unit Reported transaction price for awarded units

Direct holdings after grant 56,972.910 units Common units directly held following transaction

Indirect holdings 700 units Common units held via The Mike Stice Trust

Key Terms

Common Units (Limited Partner Interests), grant/award acquisition, indirect ownership, Form 4

4 terms

Common Units (Limited Partner Interests) financial

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

grant/award acquisition financial

"transaction_action: "grant/award acquisition""

indirect ownership financial

"ownership_type: "indirect" with nature_of_ownership "The Mike Stice Trust""

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.

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)
05/15/2026

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)	05/15/2026		A		1,098.213	A	$0	56,972.91	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:

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	05/19/2026
	** 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 director J. Michael Stice report?

J. Michael Stice reported receiving an equity award of 1,098.213 MPLX common units. The filing classifies this as a grant or award acquisition, rather than an open-market purchase, reflecting routine compensation rather than a discretionary trade in the public market.

At what price were the MPLX units granted to J. Michael Stice?

The 1,098.213 MPLX common units were reported at a transaction price of $0.00 per unit. This indicates they were granted as compensation or an award, not bought on the open market, consistent with the Form 4 code for a grant or award acquisition.

How many MPLX units does J. Michael Stice hold after this grant?

Following the reported grant, J. Michael Stice directly holds 56,972.910 MPLX common units. The Form 4 also shows 700 additional common units held indirectly through The Mike Stice Trust, providing a view of both his direct and indirect ownership positions.

What is the significance of indirect ownership via The Mike Stice Trust for MPLX?

The filing lists 700 MPLX common units held indirectly through The Mike Stice Trust. Indirect ownership means the units are held by a related entity, but still associated with the reporting person, giving investors additional context on total exposure beyond directly registered holdings.

Was this MPLX Form 4 transaction a buy or sell in the market?

The transaction was not an open-market buy or sell. The Form 4 uses code A, describing a grant, award, or other acquisition, with a price of $0.00 per unit, indicating compensation-related issuance instead of a discretionary market trade.