Director Garry Peiffer (MPLX) receives 1,180.524-unit equity award

Rhea-AI Filing Summary

MPLX LP director Garry L. Peiffer reported an acquisition of common units through an equity award. On February 17, 2026, he received 1,180.524 Common Units (Limited Partner Interests) at a price of $0.0000 per unit, described as a grant or award acquisition.

Following this transaction, Peiffer directly owned 64,072.343 common units. In addition, a revocable trust identified as the Garry L. Peiffer Revocable Trust held an indirect position of 68,497.000 common units, reflecting his beneficial ownership through that trust.

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

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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^*

Peiffer Garry L.

(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)
02/17/2026

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)	02/17/2026		A		1,180.524	A	$0	64,072.343	D
Common Units (Limited Partner Interests)								68,497	I	By Revocable Trust(1)

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:

1. By Garry L. Peiffer Revocable Trust.

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 Garry L. Peiffer	02/19/2026
	** 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.

FAQ

What insider transaction did MPLX (MPLX) director Garry L. Peiffer report?

Garry L. Peiffer reported receiving an equity award of 1,180.524 MPLX common units on February 17, 2026. The units were granted at $0.0000 per unit, reflecting a grant, award, or other acquisition rather than an open-market purchase.

How many MPLX common units does Garry L. Peiffer own directly after this Form 4?

After the reported grant, Garry L. Peiffer directly holds 64,072.343 MPLX common units. This total reflects his direct ownership following the 1,180.524-unit award on February 17, 2026, as disclosed in the insider filing.

What indirect MPLX holdings are reported for Garry L. Peiffer on this Form 4?

The filing shows an indirect holding of 68,497.000 MPLX common units owned by the Garry L. Peiffer Revocable Trust. These units are reported as indirectly owned, indicating beneficial ownership through the revocable trust structure rather than in his personal name.

Was the MPLX unit award to Garry L. Peiffer an open-market purchase?

No, the transaction is labeled as a grant, award, or other acquisition with a price of $0.0000 per unit. This indicates it was an equity award transaction, not an open-market buy order executed at prevailing market prices.

What security type is involved in Garry L. Peiffer’s MPLX Form 4 filing?

The reported security is Common Units (Limited Partner Interests) of MPLX LP. Both the direct grant of 1,180.524 units and the indirect holdings of 68,497.000 units through the revocable trust involve this same class of common units.

Does the MPLX Form 4 for Garry L. Peiffer show any sales or dispositions?

The disclosed activity is an acquisition via grant of 1,180.524 common units, with no sales or dispositions reported. The summary counts show one acquisition transaction and no dispose, buy, or sell transactions for this reporting period.