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  4. [Form 4] MPLX LP Insider Trading Activity

Director at MPLX (NYSE: MPLX) granted 2,246 common units

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

Rhea-AI Filing Summary

HELMS CHRISTOPHER A reported acquisition or exercise transactions in this Form 4 filing.

MPLX LP director Christopher A. Helms received an equity grant of 2,246.989 common units as part of his annual 2026 equity retainer award. The grant was reported at a price of $0.00 per unit, reflecting a compensation award rather than a market purchase. Following this award, Helms directly holds a total of 82,998.086 MPLX common units.

Positive

  • None.

Negative

  • None.
Insider HELMS CHRISTOPHER A
Role null
Type Security Shares Price Value
Grant/Award Common Units (Limited Partner Interests) 2,246.989 $0.00 --
Holdings After Transaction: Common Units (Limited Partner Interests) — 82,998.086 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Equity grant size 2,246.989 common units Annual 2026 equity retainer award to director
Holdings after transaction 82,998.086 common units Director’s direct MPLX holdings following grant
Reported transaction price $0.00 per unit Grant/award acquisition price for equity retainer
annual 2026 equity retainer award financial
"Represents the reporting person's annual 2026 equity retainer award."
Common Units (Limited Partner Interests) financial
"security_title: Common Units (Limited Partner Interests)"
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 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*
HELMS CHRISTOPHER A
(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)

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)04/30/2026A2,246.989(1)A$082,998.086D
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.
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 Christopher A. Helms05/04/2026
** 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

FAQ

What insider transaction did MPLX (MPLX) report for Christopher A. Helms?

MPLX reported that director Christopher A. Helms received an equity grant of 2,246.989 common units. This award reflects his annual 2026 equity retainer, issued at a reported price of $0.00 per unit as part of director compensation rather than an open-market trade.

How many MPLX units does Christopher A. Helms hold after this Form 4 transaction?

After the 2026 equity retainer award, Christopher A. Helms directly holds 82,998.086 MPLX common units. This total includes the newly granted 2,246.989 units, which were reported as a non-derivative grant at a $0.00 per-unit transaction price on the Form 4 filing.

Was the MPLX Form 4 transaction a market buy or sell by the director?

The MPLX Form 4 shows a grant classified as an acquisition, not a market buy or sell. Christopher A. Helms received 2,246.989 common units at a stated price of $0.00 per unit as his annual 2026 equity retainer, reflecting standard director compensation.

What type of security did Christopher A. Helms receive from MPLX in this filing?

Christopher A. Helms received MPLX common units, described as Common Units (Limited Partner Interests). The Form 4 records a non-derivative award of 2,246.989 units as his annual 2026 equity retainer, increasing his direct holdings to a total of 82,998.086 units after the transaction.

How is the 2026 equity retainer award for MPLX director Helms described?

The award is described in the footnotes as the reporting person's annual 2026 equity retainer award. It consists of 2,246.989 MPLX common units granted at a reported transaction price of $0.00 per unit, indicating a compensation-related equity grant for board service rather than a cash-funded purchase.