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MPLX LP (NYSE: MPLX) amends Form 4/A on 2026 director equity retainer grant

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

Walker Ray N JR reported acquisition or exercise transactions in this Form 4 filing.

MPLX LP reported that director Ray N. Walker Jr. received a grant of 2,696.387 Common Units (limited partner interests) as his annual 2026 equity retainer award on April 30, 2026. The amended report corrects this award amount and shows he beneficially owned 4,440.086 units directly after the grant as of that date, excluding any later transactions.

Positive

  • None.

Negative

  • None.
Insider Walker Ray N JR
Role Director
Type Security Shares Price Value
Grant/Award Common Units (Limited Partner Interests) F1, F2, F3 2,696.387 $0.00 $0.00
Holdings After Transaction: Common Units (Limited Partner Interests) — 4,440.086 shares (Direct)
Footnotes (3)
  1. F1. Represents the reporting person's annual 2026 equity retainer award.
  2. F2. This Form 4 is being amended to reflect the correct amount of the annual 2026 equity retainer award.
  3. 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.
Units granted 2,696.387 common units Annual 2026 equity retainer award granted on April 30, 2026
Post-transaction holdings 4,440.086 common units Beneficially owned directly after the April 30, 2026 award
Transaction price per unit $0.0000 Reported per-unit price for the equity retainer Common Units
Transaction date April 30, 2026 Date of the annual 2026 equity retainer grant
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."
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.

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Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider transaction did MPLX (MPLX) report for Ray N. Walker Jr. on April 30, 2026?
Ray N. Walker Jr., a director of MPLX GP LLC, received 2,696.387 MPLX Common Units as his annual 2026 equity retainer award on April 30, 2026. These units are reported as directly owned Common Units (Limited Partner Interests).

Why was the MPLX (MPLX) Form 4/A for Ray N. Walker Jr. amended?
The Form 4/A was amended to reflect the correct amount of the annual 2026 equity retainer award. It also updates the balance of securities beneficially owned as of April 30, 2026, clarifying that the balance excludes any transactions after that date.

How many MPLX (MPLX) units did Ray N. Walker Jr. own after the April 30, 2026 grant?
Following the April 30, 2026 equity award, Ray N. Walker Jr. beneficially owned 4,440.086 MPLX Common Units directly. A footnote specifies that this balance is reported as of April 30, 2026 and does not include any transactions occurring after that date.

What type of security was granted to the MPLX (MPLX) director in this Form 4/A?
The award consisted of Common Units (Limited Partner Interests) of MPLX LP. These units represent the director’s annual 2026 equity retainer award and are reported as directly owned securities, received at a stated price of $0.0000 per unit as an equity grant.

Was the MPLX (MPLX) director’s 2026 equity retainer award reported under a Rule 10b5-1 plan?
The transaction was not reported as being made under a Rule 10b5-1 trading plan. The document-level Rule 10b5-1 checkbox is unchecked, indicating the equity retainer grant was not affirmatively designated as pursuant to such a pre-arranged plan.
SEC Form 4
FORM 4UNITED 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*
Walker Ray N JR
(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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Units (Limited Partner Interests)04/30/2026A2,696.387(1)(2)A$04,440.086(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
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 Ray N. Walker Jr.08/05/2026
** Signature of Reporting PersonDate
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