MPLX LP (NYSE: MPLX) amends director Surma's 2026 equity retainer award

Q: What transaction did John P. Surma report for MPLX (MPLX) on April 30, 2026?

John P. Surma reported an equity grant of 3,028.941 MPLX common units on April 30, 2026 as his annual 2026 equity retainer award, received at a stated price of $0.0000 per unit as director compensation.

Q: Why was the MPLX (MPLX) insider report for John P. Surma amended?

The insider report was amended to reflect the correct amount of John P. Surma’s annual 2026 equity retainer award. The amendment clarifies the exact units granted and updates the reported balance of securities beneficially owned as of April 30, 2026.

Q: How many MPLX (MPLX) units does John P. Surma beneficially own after this grant?

Following the grant, John P. Surma beneficially owned 92,219.200 MPLX common units directly as of April 30, 2026. This reported balance applies only through that date and does not include any transactions occurring afterward.

Q: Was John P. Surma’s MPLX (MPLX) equity grant made under a Rule 10b5-1 plan?

The disclosure indicates the transaction was not made under a Rule 10b5-1 trading plan , as the Rule 10b5-1 checkbox is not affirmed. The grant is characterized as an annual 2026 equity retainer award for his director service.

Q: What is John P. Surma’s role in relation to MPLX (MPLX)?

John P. Surma serves as a director of MPLX GP LLC , the general partner of MPLX LP. MPLX LP is managed by the directors and executive officers of MPLX GP LLC, and his reported equity grant relates to this board service.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

4/A

Rhea-AI Filing Summary

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

John P. Surma, a director associated with MPLX LP, received a grant of 3,028.941 Common Units (Limited Partner Interests) on April 30, 2026 as his annual 2026 equity retainer award, at a stated price of $0.0000 per unit.

This amendment corrects the previously reported amount of the 2026 equity retainer grant and states that Surma beneficially owned 92,219.200 common units directly following the award as of April 30, 2026; this balance excludes any transactions after that date.

Insider Trade Summary

Net Buyer: 3,028.941 shares

Net Buy 1 txn

Insider SURMA JOHN P

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Units (Limited Partner Interests) ^{F1, F2, F3}	3,028.941	$0.00	$0.00

Holdings After Transaction: Common Units (Limited Partner Interests) — 92,219.2 shares (Direct)

Footnotes (3)

F1. Represents the reporting person's annual 2026 equity retainer award.
F2. This Form 4 is being amended to reflect the correct amount of the annual 2026 equity retainer award.
F3. This amount reflects the correct balance of securities beneficially owned as of April 30, 2026. This balance does not include any transactions that occurred after April 30, 2026.

Key Figures

2026 equity retainer units granted: 3,028.941 common units Grant price per unit: $0.0000 per unit Units beneficially owned after grant: 92,219.200 common units

3 metrics

2026 equity retainer units granted 3,028.941 common units Annual 2026 equity retainer award granted on April 30, 2026

Grant price per unit $0.0000 per unit Stated price for the 2026 equity retainer common unit grant

Units beneficially owned after grant 92,219.200 common units Direct beneficial ownership balance as of April 30, 2026 after the award

Key Terms

Common Units (Limited Partner Interests), equity retainer award, beneficially owned

3 terms

Common Units (Limited Partner Interests) financial

"security title listed as Common Units (Limited Partner Interests)"

equity retainer award financial

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

beneficially owned financial

"reflects the correct balance of securities beneficially owned as of April 30, 2026"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/05/2026 - 04:21 PM Accepted by SEC EDGAR 08/05/2026 - 04:21 PM

FAQ

What transaction did John P. Surma report for MPLX (MPLX) on April 30, 2026?

John P. Surma reported an equity grant of 3,028.941 MPLX common units on April 30, 2026 as his annual 2026 equity retainer award, received at a stated price of $0.0000 per unit as director compensation.

How many MPLX (MPLX) units were included in the 2026 equity retainer award?

The 2026 equity retainer award to John P. Surma consisted of 3,028.941 common units. These units represent his annual 2026 equity retainer as a director, granted on April 30, 2026, and reported as an acquisition rather than a sale.

Why was the MPLX (MPLX) insider report for John P. Surma amended?

The insider report was amended to reflect the correct amount of John P. Surma’s annual 2026 equity retainer award. The amendment clarifies the exact units granted and updates the reported balance of securities beneficially owned as of April 30, 2026.

How many MPLX (MPLX) units does John P. Surma beneficially own after this grant?

Following the grant, John P. Surma beneficially owned 92,219.200 MPLX common units directly as of April 30, 2026. This reported balance applies only through that date and does not include any transactions occurring afterward.

Was John P. Surma’s MPLX (MPLX) equity grant made under a Rule 10b5-1 plan?

The disclosure indicates the transaction was not made under a Rule 10b5-1 trading plan, as the Rule 10b5-1 checkbox is not affirmed. The grant is characterized as an annual 2026 equity retainer award for his director service.

What is John P. Surma’s role in relation to MPLX (MPLX)?

John P. Surma serves as a director of MPLX GP LLC, the general partner of MPLX LP. MPLX LP is managed by the directors and executive officers of MPLX GP LLC, and his reported equity grant relates to this board service.

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)
05/04/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Units (Limited Partner Interests)	04/30/2026		A		3,028.941⁽¹⁾⁽²⁾	A	$0	92,219.2⁽³⁾	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

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

2. This Form 4 is being amended to reflect the correct amount of the annual 2026 equity retainer award.

3. This amount reflects the correct balance of securities beneficially owned as of April 30, 2026. This balance does not include any transactions that occurred after April 30, 2026.

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	08/05/2026
	** 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)

Source: View Original Filing on SEC EDGAR