MPLX

Mplx LP

Insider trading activity for Mplx LP, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 79 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Aug 14	Peiffer Garry L.	Director	AGRANT	1,232.17	—	—	+1.8%	Open the original filing on SEC.gov
Aug 14	Walker Ray N JR	Director	AGRANT	81.94	—	—	+1.8%	Open the original filing on SEC.gov
Aug 14	Surma John P	Director	AGRANT	1,563.43	—	—	+1.7%	Open the original filing on SEC.gov
Aug 14	Stice J Michael	Director	AGRANT	982.72	—	—	+1.7%	Open the original filing on SEC.gov
Aug 14	Semple Frank M	Director	AGRANT	1,072.72	—	—	+1.7%	Open the original filing on SEC.gov
Aug 14	Helms Christopher A	Director	AGRANT	1,336.96	—	—	+1.6%	Open the original filing on SEC.gov
Aug 14	Breves Christine S	Director	AGRANT	218.82	—	—	+1.5%	Open the original filing on SEC.gov
May 15	Walker Ray N JR	Director	AGRANT	78.44	—	—	+2.0%	Open the original filing on SEC.gov
May 15	Surma John P	Director	AGRANT	1,656.32	—	—	+1.8%	Open the original filing on SEC.gov
May 15	Stice J Michael	Director	AGRANT	1,098.21	—	—	+2.0%	Open the original filing on SEC.gov
May 15	Semple Frank M	Director	AGRANT	1,194.07	—	—	+2.0%	Open the original filing on SEC.gov
May 15	Peiffer Garry L.	Director	AGRANT	1,303.5	—	—	+2.0%	Open the original filing on SEC.gov
May 15	Helms Christopher A	Director	AGRANT	1,415.12	—	—	+1.7%	Open the original filing on SEC.gov
May 15	Breves Christine S	Director	AGRANT	276.83	—	—	+2.0%	Open the original filing on SEC.gov
Apr 30	Walker Ray N JR	Director	AGRANT↺	2,696.39	—	—	+154.6%	Open the original filing on SEC.gov
Apr 30	Surma John P	Director	AGRANT↺	3,028.94	—	—	+3.4%	Open the original filing on SEC.gov
Apr 30	Stice J Michael	Director	AGRANT↺	3,028.94	—	—	+5.7%	Open the original filing on SEC.gov
Apr 30	Semple Frank M	Director	AGRANT↺	3,028.94	—	—	+5.2%	Open the original filing on SEC.gov
Apr 30	Peiffer Garry L.	Director	AGRANT↺	2,696.39	—	—	+4.2%	Open the original filing on SEC.gov
Apr 30	Helms Christopher A	Director	AGRANT↺	2,696.39	—	—	+3.3%	Open the original filing on SEC.gov
Apr 30	Breves Christine S	Director	AGRANT↺	2,696.39	—	—	+22.8%	Open the original filing on SEC.gov
Mar 2	Mannen Maryann T.	Chairman, President &…	FTAX	6,409	$59.22	$379.5K	-3.7%	Open the original filing on SEC.gov
Mar 2	Mannen Maryann T.	Chairman, President &…	FTAX	3,404	$59.22	$201.6K	-1.9%	Open the original filing on SEC.gov
Mar 2	Mannen Maryann T.	Chairman, President &…	FTAX	3,407	$59.22	$201.8K	-1.9%	Open the original filing on SEC.gov
Mar 2	Lyon Shawn M	Senior VP, Log. &…	FTAX	798	$59.22	$47.3K	-2.7%	Open the original filing on SEC.gov
Mar 2	Lyon Shawn M	Senior VP, Log. &…	FTAX	1,033	$59.22	$61.2K	-3.4%	Open the original filing on SEC.gov
Mar 2	Lyon Shawn M	Senior VP, Log. &…	FTAX	920	$59.22	$54.5K	-3.0%	Open the original filing on SEC.gov
Mar 2	Hagedorn Carl Kristopher	Exec VP & Chief Fin Ofc	FTAX	663	$59.22	$39.3K	-3.1%	Open the original filing on SEC.gov
Mar 2	Hagedorn Carl Kristopher	Exec VP & Chief Fin Ofc	FTAX	916	$59.22	$54.2K	-4.2%	Open the original filing on SEC.gov
Mar 2	Hagedorn Carl Kristopher	Exec VP & Chief Fin Ofc	FTAX	422	$59.22	$25K	-1.9%	Open the original filing on SEC.gov
Mar 2	Floerke Gregory Scott	Exec. VP and COO	FTAX	797	$59.22	$47.2K	-0.8%	Open the original filing on SEC.gov
Mar 2	Floerke Gregory Scott	Exec. VP and COO	FTAX	1,100	$59.22	$65.1K	-1.1%	Open the original filing on SEC.gov
Mar 2	Floerke Gregory Scott	Exec. VP and COO	FTAX	995	$59.22	$58.9K	-1.0%	Open the original filing on SEC.gov
Mar 2	Benson Molly R	Chief Legal Ofc & Corp…	FTAX	998	$59.22	$59.1K	-2.1%	Open the original filing on SEC.gov
Mar 2	Benson Molly R	Chief Legal Ofc & Corp…	FTAX	1,240	$59.22	$73.4K	-2.6%	Open the original filing on SEC.gov
Mar 2	Benson Molly R	Chief Legal Ofc & Corp…	FTAX	614	$59.22	$36.4K	-1.3%	Open the original filing on SEC.gov
Mar 1	Mannen Maryann T.	Chairman, President &…	AGRANT	52,817	—	—	+42.0%	Open the original filing on SEC.gov
Mar 1	Lyon Shawn M	Senior VP, Log. &…	AGRANT	5,986	—	—	+23.9%	Open the original filing on SEC.gov
Mar 1	Khoury Maria A	Director	AGRANT	8,451	—	—	—	Open the original filing on SEC.gov
Mar 1	Hagedorn Carl Kristopher	Exec VP & Chief Fin Ofc	AGRANT	4,930	—	—	+28.2%	Open the original filing on SEC.gov
Mar 1	Floerke Gregory Scott	Exec. VP and COO	AGRANT	5,986	—	—	+6.5%	Open the original filing on SEC.gov
Mar 1	Benson Molly R	Chief Legal Ofc & Corp…	AGRANT	8,803	—	—	+21.9%	Open the original filing on SEC.gov
Feb 17	Walker Ray N JR	Director	AGRANT	32.13	—	—	+1.9%	Open the original filing on SEC.gov
Feb 17	Surma John P	Director	AGRANT	1,505.13	—	—	+1.7%	Open the original filing on SEC.gov
Feb 17	Stice J Michael	Director	AGRANT	981.96	—	—	+1.9%	Open the original filing on SEC.gov
Feb 17	Semple Frank M	Director	AGRANT	1,071.82	—	—	+1.9%	Open the original filing on SEC.gov
Feb 17	Peiffer Garry L.	Director	AGRANT	1,180.52	—	—	+1.9%	Open the original filing on SEC.gov
Feb 17	Helms Christopher A	Director	AGRANT	1,285.16	—	—	+1.6%	Open the original filing on SEC.gov
Feb 17	Breves Christine S	Director	AGRANT	218.1	—	—	+1.9%	Open the original filing on SEC.gov
Dec 12, 2025	Lyon Shawn M	Senior VP, Log. &…	FTAX	245	$54.85	$13.4K	-1.0%	Open the original filing on SEC.gov
Dec 12, 2025	Hennigan Michael J	Executive Chairman	FTAX	1,335	$54.85	$73.2K	-0.4%	Open the original filing on SEC.gov
Dec 12, 2025	Floerke Gregory Scott	Exec. VP and COO	FTAX	242	$54.85	$13.3K	-0.3%	Open the original filing on SEC.gov
Dec 12, 2025	Benson Molly R	Chief Legal Ofc & Corp…	FTAX	306	$54.85	$16.8K	-0.8%	Open the original filing on SEC.gov
Nov 14, 2025	Walker Ray N JR	Director	AGRANT	33.94	—	—	+2.0%	Open the original filing on SEC.gov
Nov 14, 2025	Surma John P	Director	AGRANT	1,590.07	—	—	+1.8%	Open the original filing on SEC.gov
Nov 14, 2025	Stice J Michael	Director	AGRANT	1,037.37	—	—	+2.0%	Open the original filing on SEC.gov
Nov 14, 2025	Semple Frank M	Director	AGRANT	1,132.3	—	—	+2.0%	Open the original filing on SEC.gov
Nov 14, 2025	Peiffer Garry L.	Director	AGRANT	1,247.14	—	—	+2.0%	Open the original filing on SEC.gov
Nov 14, 2025	Helms Christopher A	Director	AGRANT	1,357.68	—	—	+1.7%	Open the original filing on SEC.gov
Nov 14, 2025	Breves Christine S	Director	AGRANT	230.41	—	—	+2.0%	Open the original filing on SEC.gov
Aug 25, 2025	Walker Ray N JR	Director	AGRANT	1,677.63	—	—	—	Open the original filing on SEC.gov
Aug 15, 2025	Peiffer Garry L.	Director	AGRANT	1,157.13	—	—	+1.9%	Open the original filing on SEC.gov
Aug 15, 2025	Stice J Michael	Director	AGRANT	962.49	—	—	+1.9%	Open the original filing on SEC.gov
Aug 15, 2025	Semple Frank M	Director	AGRANT	1,050.57	—	—	+1.9%	Open the original filing on SEC.gov
Aug 15, 2025	Surma John P	Director	AGRANT	1,475.3	—	—	+1.7%	Open the original filing on SEC.gov
Aug 15, 2025	Helms Christopher A	Director	AGRANT	1,259.68	—	—	+1.6%	Open the original filing on SEC.gov
Aug 15, 2025	Breves Christine S	Director	AGRANT	213.78	—	—	+1.9%	Open the original filing on SEC.gov
May 16, 2025	Surma John P	Director	AGRANT	1,390.31	—	—	+1.7%	Open the original filing on SEC.gov
May 16, 2025	Stice J Michael	Director	AGRANT	907.05	—	—	+1.8%	Open the original filing on SEC.gov
May 16, 2025	Semple Frank M	Director	AGRANT	990.06	—	—	+1.8%	Open the original filing on SEC.gov
May 16, 2025	Peiffer Garry L.	Director	AGRANT	1,090.47	—	—	+1.8%	Open the original filing on SEC.gov
May 16, 2025	Helms Christopher A	Director	AGRANT	1,187.12	—	—	+1.6%	Open the original filing on SEC.gov
May 16, 2025	Breves Christine S	Director	AGRANT	201.47	—	—	+1.8%	Open the original filing on SEC.gov
May 1, 2025	Surma John P	Director	AGRANT	2,848.35	—	—	+3.5%	Open the original filing on SEC.gov
May 1, 2025	Stice J Michael	Director	AGRANT	2,848.35	—	—	+6.1%	Open the original filing on SEC.gov
May 1, 2025	Semple Frank M	Director	AGRANT	2,848.35	—	—	+5.6%	Open the original filing on SEC.gov
May 1, 2025	Peiffer Garry L.	Director	AGRANT	2,481.14	—	—	+4.4%	Open the original filing on SEC.gov
May 1, 2025	Helms Christopher A	Director	AGRANT	2,481.14	—	—	+3.4%	Open the original filing on SEC.gov
May 1, 2025	Breves Christine S	Director	AGRANT	2,481.14	—	—	+29.2%	Open the original filing on SEC.gov

AGRANT—

Peiffer Garry L. · DirectorAug 14

1,232.17 sh · +1.8% own

AGRANT—

Walker Ray N JR · DirectorAug 14

81.94 sh · +1.8% own

AGRANT—

Surma John P · DirectorAug 14

1,563.43 sh · +1.7% own

AGRANT—

Stice J Michael · DirectorAug 14

982.72 sh · +1.7% own

AGRANT—

Semple Frank M · DirectorAug 14

1,072.72 sh · +1.7% own

AGRANT—

Helms Christopher A · DirectorAug 14

1,336.96 sh · +1.6% own

AGRANT—

Breves Christine S · DirectorAug 14

218.82 sh · +1.5% own

AGRANT—

Walker Ray N JR · DirectorMay 15

78.44 sh · +2.0% own

AGRANT—

Surma John P · DirectorMay 15

1,656.32 sh · +1.8% own

AGRANT—

Stice J Michael · DirectorMay 15

1,098.21 sh · +2.0% own

AGRANT—

Semple Frank M · DirectorMay 15

1,194.07 sh · +2.0% own

AGRANT—

Peiffer Garry L. · DirectorMay 15

1,303.5 sh · +2.0% own

AGRANT—

Helms Christopher A · DirectorMay 15

1,415.12 sh · +1.7% own

AGRANT—

Breves Christine S · DirectorMay 15

276.83 sh · +2.0% own

AGRANT↺—

Walker Ray N JR · DirectorApr 30

2,696.39 sh · +154.6% own

AGRANT↺—

Surma John P · DirectorApr 30

3,028.94 sh · +3.4% own

AGRANT↺—

Stice J Michael · DirectorApr 30

3,028.94 sh · +5.7% own

AGRANT↺—

Semple Frank M · DirectorApr 30

3,028.94 sh · +5.2% own

AGRANT↺—

Peiffer Garry L. · DirectorApr 30

2,696.39 sh · +4.2% own

AGRANT↺—

Helms Christopher A · DirectorApr 30

2,696.39 sh · +3.3% own

AGRANT↺—

Breves Christine S · DirectorApr 30

2,696.39 sh · +22.8% own

FTAX$379.5K

Mannen Maryann T. · Chairman, Presiden…Mar 2

6,409 sh @ $59.22 · -3.7% own

FTAX$201.6K

Mannen Maryann T. · Chairman, Presiden…Mar 2

3,404 sh @ $59.22 · -1.9% own

FTAX$201.8K

Mannen Maryann T. · Chairman, Presiden…Mar 2

3,407 sh @ $59.22 · -1.9% own

FTAX$47.3K

Lyon Shawn M · Senior VP, Log. &…Mar 2

798 sh @ $59.22 · -2.7% own

FTAX$61.2K

Lyon Shawn M · Senior VP, Log. &…Mar 2

1,033 sh @ $59.22 · -3.4% own

FTAX$54.5K

Lyon Shawn M · Senior VP, Log. &…Mar 2

920 sh @ $59.22 · -3.0% own

FTAX$39.3K

Hagedorn Carl Kristopher · Exec VP & Chief…Mar 2

663 sh @ $59.22 · -3.1% own

FTAX$54.2K

Hagedorn Carl Kristopher · Exec VP & Chief…Mar 2

916 sh @ $59.22 · -4.2% own

FTAX$25K

Hagedorn Carl Kristopher · Exec VP & Chief…Mar 2

422 sh @ $59.22 · -1.9% own

FTAX$47.2K

Floerke Gregory Scott · Exec. VP and COOMar 2

797 sh @ $59.22 · -0.8% own

FTAX$65.1K

Floerke Gregory Scott · Exec. VP and COOMar 2

1,100 sh @ $59.22 · -1.1% own

FTAX$58.9K

Floerke Gregory Scott · Exec. VP and COOMar 2

995 sh @ $59.22 · -1.0% own

FTAX$59.1K

Benson Molly R · Chief Legal Ofc &…Mar 2

998 sh @ $59.22 · -2.1% own

FTAX$73.4K

Benson Molly R · Chief Legal Ofc &…Mar 2

1,240 sh @ $59.22 · -2.6% own

FTAX$36.4K

Benson Molly R · Chief Legal Ofc &…Mar 2

614 sh @ $59.22 · -1.3% own

AGRANT—

Mannen Maryann T. · Chairman, Presiden…Mar 1

52,817 sh · +42.0% own

AGRANT—

Lyon Shawn M · Senior VP, Log. &…Mar 1

5,986 sh · +23.9% own

AGRANT—

Khoury Maria A · DirectorMar 1

8,451 sh

AGRANT—

Hagedorn Carl Kristopher · Exec VP & Chief…Mar 1

4,930 sh · +28.2% own

AGRANT—

Floerke Gregory Scott · Exec. VP and COOMar 1

5,986 sh · +6.5% own

AGRANT—

Benson Molly R · Chief Legal Ofc &…Mar 1

8,803 sh · +21.9% own

AGRANT—

Walker Ray N JR · DirectorFeb 17

32.13 sh · +1.9% own

AGRANT—

Surma John P · DirectorFeb 17

1,505.13 sh · +1.7% own

AGRANT—

Stice J Michael · DirectorFeb 17

981.96 sh · +1.9% own

AGRANT—

Semple Frank M · DirectorFeb 17

1,071.82 sh · +1.9% own

AGRANT—

Peiffer Garry L. · DirectorFeb 17

1,180.52 sh · +1.9% own

AGRANT—

Helms Christopher A · DirectorFeb 17

1,285.16 sh · +1.6% own

AGRANT—

Breves Christine S · DirectorFeb 17

218.1 sh · +1.9% own

FTAX$13.4K

Lyon Shawn M · Senior VP, Log. &…Dec 12, 2025

245 sh @ $54.85 · -1.0% own

FTAX$73.2K

Hennigan Michael J · Executive ChairmanDec 12, 2025

1,335 sh @ $54.85 · -0.4% own

FTAX$13.3K

Floerke Gregory Scott · Exec. VP and COODec 12, 2025

242 sh @ $54.85 · -0.3% own

FTAX$16.8K

Benson Molly R · Chief Legal Ofc &…Dec 12, 2025

306 sh @ $54.85 · -0.8% own

AGRANT—

Walker Ray N JR · DirectorNov 14, 2025

33.94 sh · +2.0% own

AGRANT—

Surma John P · DirectorNov 14, 2025

1,590.07 sh · +1.8% own

AGRANT—

Stice J Michael · DirectorNov 14, 2025

1,037.37 sh · +2.0% own

AGRANT—

Semple Frank M · DirectorNov 14, 2025

1,132.3 sh · +2.0% own

AGRANT—

Peiffer Garry L. · DirectorNov 14, 2025

1,247.14 sh · +2.0% own

AGRANT—

Helms Christopher A · DirectorNov 14, 2025

1,357.68 sh · +1.7% own

AGRANT—

Breves Christine S · DirectorNov 14, 2025

230.41 sh · +2.0% own

AGRANT—

Walker Ray N JR · DirectorAug 25, 2025

1,677.63 sh

AGRANT—

Peiffer Garry L. · DirectorAug 15, 2025

1,157.13 sh · +1.9% own

AGRANT—

Stice J Michael · DirectorAug 15, 2025

962.49 sh · +1.9% own

AGRANT—

Semple Frank M · DirectorAug 15, 2025

1,050.57 sh · +1.9% own

AGRANT—

Surma John P · DirectorAug 15, 2025

1,475.3 sh · +1.7% own

AGRANT—

Helms Christopher A · DirectorAug 15, 2025

1,259.68 sh · +1.6% own

AGRANT—

Breves Christine S · DirectorAug 15, 2025

213.78 sh · +1.9% own

AGRANT—

Surma John P · DirectorMay 16, 2025

1,390.31 sh · +1.7% own

AGRANT—

Stice J Michael · DirectorMay 16, 2025

907.05 sh · +1.8% own

AGRANT—

Semple Frank M · DirectorMay 16, 2025

990.06 sh · +1.8% own

AGRANT—

Peiffer Garry L. · DirectorMay 16, 2025

1,090.47 sh · +1.8% own

AGRANT—

Helms Christopher A · DirectorMay 16, 2025

1,187.12 sh · +1.6% own

AGRANT—

Breves Christine S · DirectorMay 16, 2025

201.47 sh · +1.8% own

AGRANT—

Surma John P · DirectorMay 1, 2025

2,848.35 sh · +3.5% own

AGRANT—

Stice J Michael · DirectorMay 1, 2025

2,848.35 sh · +6.1% own

AGRANT—

Semple Frank M · DirectorMay 1, 2025

2,848.35 sh · +5.6% own

AGRANT—

Peiffer Garry L. · DirectorMay 1, 2025

2,481.14 sh · +4.4% own

AGRANT—

Helms Christopher A · DirectorMay 1, 2025

2,481.14 sh · +3.4% own

AGRANT—

Breves Christine S · DirectorMay 1, 2025

2,481.14 sh · +29.2% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 57 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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