MPLX director awarded 1,656 common units

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

Accepted by SEC EDGAR 05/19/2026 - 04:16 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

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

MPLX LP director John P. Surma received a grant of 1,656.317 Common Units (limited partner interests) on May 15, 2026. The units were awarded at a reported price of $0.00 per unit as compensation, increasing his direct holdings to 93,426.119 units.

Insider Trade Summary

Grant/Award: 1,656.317 shares

Grant/Award 1 txn

Insider SURMA JOHN P

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Units (Limited Partner Interests)	1,656.317	$0.00	$0.00

Holdings After Transaction: Common Units (Limited Partner Interests) — 93,426.119 shares (Direct)

Key Figures

Units granted: 1,656.317 units Grant price: $0.00 per unit Holdings after grant: 93,426.119 units

3 metrics

Units granted 1,656.317 units Equity grant on May 15, 2026

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

Holdings after grant 93,426.119 units Total direct MPLX units after transaction

Key Terms

Common Units (Limited Partner Interests), Grant, award, or other acquisition, transaction code A

3 terms

Common Units (Limited Partner Interests) financial

"security_title: Common Units (Limited Partner Interests)"

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

transaction code A regulatory

"transaction_code: A, indicating a grant, award, or other acquisition"

FAQ

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

What insider transaction did MPLX director John P. Surma report?

John P. Surma reported receiving a grant of 1,656.317 MPLX Common Units. The award was recorded at a price of $0.00 per unit, reflecting a compensation-related equity grant rather than an open-market purchase or sale.

How many MPLX units does John P. Surma hold after this Form 4 grant?

After the reported grant, John P. Surma directly holds 93,426.119 MPLX Common Units. This figure includes the newly awarded 1,656.317 units and represents his post-transaction ownership position disclosed in the Form 4 filing.

Was the MPLX equity grant to John P. Surma an open-market purchase?

No, the 1,656.317 MPLX units were reported with transaction code A, indicating a grant, award, or other acquisition. The transaction price per unit was disclosed as $0.00, consistent with a compensation grant rather than an open-market purchase.

What does transaction code A mean in the MPLX Form 4 for John P. Surma?

Transaction code A in this MPLX Form 4 denotes a grant, award, or other acquisition of securities. For John P. Surma, it reflects a compensation-related grant of 1,656.317 Common Units instead of a market trade initiated by the director.

Is John P. Surma’s MPLX ownership direct or indirect after this transaction?

The filing identifies John P. Surma’s ownership as direct, using ownership code D. This means the 93,426.119 MPLX Common Units reported after the transaction are held directly in his name, rather than through an intermediate entity or trust.

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^*

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)
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		1,656.317	A	$0	93,426.119	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:

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	05/19/2026
	** 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)