MPLX LP (MPLX) director granted 2,579-unit 2026 equity retainer

Rhea-AI Filing Summary

SURMA JOHN P reported acquisition or exercise transactions in this Form 4 filing.

MPLX LP director John P. Surma received an equity grant of 2,579.543 Common Units (limited partner interests) as his annual 2026 equity retainer award. The award was recorded at a price of $0.00 per unit, indicating it was compensation rather than a market purchase.

Following this grant, Surma directly holds a total of 91,769.802 MPLX Common Units. This filing reflects routine board compensation and does not show any open-market buying or selling activity.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider SURMA JOHN P

Role null

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

Holdings After Transaction: Common Units (Limited Partner Interests) — 91,769.802 shares (Direct, null)

Footnotes (1)

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Key Figures

Equity grant size: 2,579.543 units Transaction price: $0.00 per unit Holdings after transaction: 91,769.802 units +1 more

4 metrics

Equity grant size 2,579.543 units Annual 2026 equity retainer award

Transaction price $0.00 per unit Grant price for 2026 equity retainer units

Holdings after transaction 91,769.802 units Direct MPLX Common Units after grant

Transaction date 2026-04-30 Date of equity grant reported on Form 4

Key Terms

Common Units (Limited Partner Interests), equity retainer award, Form 4

3 terms

Common Units (Limited Partner Interests) financial

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

equity retainer award financial

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

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^*

SURMA JOHN P

(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	91,769.802	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 John P. Surma	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 did MPLX (MPLX) director John P. Surma report in this Form 4 filing?

John P. Surma reported receiving an equity grant of 2,579.543 MPLX Common Units. The units were awarded at $0.00 per unit as part of his annual 2026 equity retainer, indicating compensation rather than an open-market transaction.

How many MPLX units were granted to John P. Surma as his 2026 equity retainer?

He was granted 2,579.543 Common Units of MPLX LP. The filing identifies this as his annual 2026 equity retainer award, providing stock-based compensation in the form of additional limited partner interests.

What are John P. Surma’s MPLX holdings after this reported equity award?

After the grant, John P. Surma directly holds 91,769.802 Common Units of MPLX. This total reflects his ownership following the 2,579.543-unit equity retainer award disclosed in the Form 4 filing.

Was cash paid for the MPLX units granted to John P. Surma?

No cash was paid for the units; the transaction price is shown as $0.00 per unit. This confirms the 2,579.543 units were granted as compensation, not acquired through an open-market purchase.

What is the nature of the MPLX securities John P. Surma received in this Form 4?

The securities are MPLX LP Common Units, described as limited partner interests. These units form part of his equity compensation, specifically labeled as his annual 2026 equity retainer award in the filing’s footnote.