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[Form 4] MPLX LP Insider Trading Activity

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
4
Rhea-AI Filing Summary

Director J. Michael Stice reported an acquisition of MPLX common units. On 08/15/2025 he acquired 962.494 common units at a reported price of $0, increasing his total beneficial ownership to 51,275.827 common units. The filing shows 700 units held indirectly by The Mike Stice Trust. The reporting person is a director of MPLX GP LLC, the issuer's general partner.

Il direttore J. Michael Stice ha comunicato l'acquisizione di unità ordinarie MPLX. In data 08/15/2025 ha acquistato 962,494 unità ordinarie a un prezzo indicato di $0, portando la sua partecipazione totale a 51,275.827 unità ordinarie. La segnalazione riporta 700 unità detenute indirettamente da The Mike Stice Trust. La persona che ha effettuato la comunicazione è direttore di MPLX GP LLC, il general partner dell'emittente.

El director J. Michael Stice informó la adquisición de unidades ordinarias de MPLX. El 15/08/2025 adquirió 962,494 unidades ordinarias a un precio declarado de $0, elevando su participación total a 51,275.827 unidades ordinarias. La presentación indica que 700 unidades se mantienen de forma indirecta a través de The Mike Stice Trust. La persona informante es director de MPLX GP LLC, el socio general del emisor.

이사 J. Michael Stice� MPLX 보통� 유닛 취득� 보고했습니다. 2025-08-15� 962.494개의 보통� 유닛� 신고� 가� $0� 취득하여 � 실질 보유량을 51,275.827 유닛으로 늘렸습니�. 신고서에� 700유닛� The Mike Stice Trust� 통해 간접 보유 중인 것으� 표시되어 있습니다. 보고인은 발행사의 일반 파트너인 MPLX GP LLC� 이사입니�.

Le directeur J. Michael Stice a déclaré l'acquisition d'unités ordinaires MPLX. Le 15/08/2025, il a acquis 962,494 unités ordinaires à un prix déclaré de 0 $, portant sa détention bénéficiaire totale à 51,275.827 unités ordinaires. Le dossier indique que 700 unités sont détenues indirectement par The Mike Stice Trust. La personne déclarant est directeur de MPLX GP LLC, le partenaire général de l'émetteur.

Direktor J. Michael Stice meldete den Erwerb von MPLX-Stammanteilen. Am 15.08.2025 erwarb er 962,494 Stammanteile zu einem gemeldeten Preis von 0 $, womit sein gesamter wirtschaftlicher Besitz auf 51,275.827 Stammanteile anwuchs. Die Meldung weist 700 Anteile aus, die indirekt von The Mike Stice Trust gehalten werden. Die meldende Person ist Direktor von MPLX GP LLC, dem General Partner des Emittenten.

Positive
  • Insider acquisition disclosed showing transparency about director ownership
  • Total beneficial ownership disclosed at 51,275.827 common units, improving clarity for investors
Negative
  • None.

Insights

TL;DR: A director received 962.494 MPLX units at no cash cost, modestly increasing his stake.

The transaction is coded as an acquisition with a price of $0, which typically reflects a grant, distribution, or other non-cash award rather than an open-market purchase. The filing confirms the reporter's role as a director of MPLX GP LLC, the general partner that manages the issuer, which is relevant to insider reporting and governance transparency. The ownership level of 51,275.827 units is disclosed, with 700 held indirectly via a trust.

TL;DR: Insider received units; the amount is small relative to institutional holdings but noteworthy for disclosure.

The Form 4 documents a non‑market acquisition of 962.494 common units on 08/15/2025 at $0, reporting post-transaction beneficial ownership of 51,275.827 units. The filing was signed by an attorney-in-fact. This is a routine insider disclosure that updates ownership but contains no pricing or market-sale information to assess immediate market impact.

Il direttore J. Michael Stice ha comunicato l'acquisizione di unità ordinarie MPLX. In data 08/15/2025 ha acquistato 962,494 unità ordinarie a un prezzo indicato di $0, portando la sua partecipazione totale a 51,275.827 unità ordinarie. La segnalazione riporta 700 unità detenute indirettamente da The Mike Stice Trust. La persona che ha effettuato la comunicazione è direttore di MPLX GP LLC, il general partner dell'emittente.

El director J. Michael Stice informó la adquisición de unidades ordinarias de MPLX. El 15/08/2025 adquirió 962,494 unidades ordinarias a un precio declarado de $0, elevando su participación total a 51,275.827 unidades ordinarias. La presentación indica que 700 unidades se mantienen de forma indirecta a través de The Mike Stice Trust. La persona informante es director de MPLX GP LLC, el socio general del emisor.

이사 J. Michael Stice� MPLX 보통� 유닛 취득� 보고했습니다. 2025-08-15� 962.494개의 보통� 유닛� 신고� 가� $0� 취득하여 � 실질 보유량을 51,275.827 유닛으로 늘렸습니�. 신고서에� 700유닛� The Mike Stice Trust� 통해 간접 보유 중인 것으� 표시되어 있습니다. 보고인은 발행사의 일반 파트너인 MPLX GP LLC� 이사입니�.

Le directeur J. Michael Stice a déclaré l'acquisition d'unités ordinaires MPLX. Le 15/08/2025, il a acquis 962,494 unités ordinaires à un prix déclaré de 0 $, portant sa détention bénéficiaire totale à 51,275.827 unités ordinaires. Le dossier indique que 700 unités sont détenues indirectement par The Mike Stice Trust. La personne déclarant est directeur de MPLX GP LLC, le partenaire général de l'émetteur.

Direktor J. Michael Stice meldete den Erwerb von MPLX-Stammanteilen. Am 15.08.2025 erwarb er 962,494 Stammanteile zu einem gemeldeten Preis von 0 $, womit sein gesamter wirtschaftlicher Besitz auf 51,275.827 Stammanteile anwuchs. Die Meldung weist 700 Anteile aus, die indirekt von The Mike Stice Trust gehalten werden. Die meldende Person ist Direktor von MPLX GP LLC, dem General Partner des Emittenten.

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*
STICE J MICHAEL

(Last) (First) (Middle)
C/O MPLX LP
200 E. HARDIN STREET

(Street)
FINDLAY OH 45840

(City) (State) (Zip)
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)
3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
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) 08/15/2025 A 962.494 A $0 51,275.827 D
Common Units (Limited Partner Interests) 700 I The Mike Stice Trust
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 J. Michael Stice 08/19/2025
** 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.

FAQ

What did MPLX director J. Michael Stice report on Form 4?

He reported an acquisition of 962.494 common units of MPLX on 08/15/2025 at a reported price of $0, with total beneficial ownership now 51,275.827 units.

Does the Form 4 indicate indirect ownership for J. Michael Stice?

Yes. The filing shows 700 common units held indirectly by The Mike Stice Trust.

What does the reported price of $0 mean in this Form 4?

The form explicitly reports a price of $0 for the acquisition. The document does not provide further explanation of the price in this filing.

What is the reporting person’s relationship to MPLX?

The filing states he is a Director of MPLX GP LLC, the general partner that manages the issuer.

When was the Form 4 signed and by whom?

The signature block shows the form was signed on 08/19/2025 by Molly R. Benson, Attorney-in-Fact for J. Michael Stice.
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51.70B
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Oil & Gas Midstream
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United States
FINDLAY