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Who

Garry L. Peiffer

Director

Company insider

Files Form 4 as: President, Mplx LP; Executive VP (See Remarks), Marathon Petroleum.

In numbers

Trades disclosed
138
Buys
3
Sells
0
Bought
$1.6M
Sold
$0
Companies
2
Companies where not an officer
0
First trade
30 Jun 2011
Last trade
14 Aug 2026
Last filed
18 Aug 2026

Companies traded

Where they are an officer
MPLX Mplx LPDirector, Officer · Midstream & Pipelines · last 14 Aug 20263 buys · 0 sells
MPC Marathon PetroleumOfficer · Refining & Marketing · last 2 Jan 20140 buys · 0 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
14 Aug 2026filed 18 Aug 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,232.166 at $0.00filing
14 Aug 2026filed 18 Aug 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,232.17 at $0.00filing
15 May 2026filed 19 May 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,303.501 at $0.00filing
15 May 2026filed 19 May 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,303.5 at $0.00filing
30 Apr 2026filed 5 Aug 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—2,696.387 at $0.00filing
30 Apr 2026filed 5 Aug 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—2,696.39 at $0.00filing
30 Apr 2026filed 4 May 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—2,246.989 at $0.00filing
30 Apr 2026filed 4 May 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—2,246.99 at $0.00filing
17 Feb 2026filed 19 Feb 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,180.524 at $0.00filing
17 Feb 2026filed 19 Feb 2026MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,180.52 at $0.00filing
14 Nov 2025filed 18 Nov 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,247.14 at $0.00filing
15 Aug 2025filed 19 Aug 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,157.13 at $0.00filing
16 May 2025filed 20 May 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,090.47 at $0.00filing
1 May 2025filed 5 May 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—2,481.14 at $0.00filing
1 Apr 2025filed 3 Apr 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—192.03 at $0.00filing
14 Feb 2025filed 18 Feb 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—990.32 at $0.00filing
2 Jan 2025filed 6 Jan 2025MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—642.48 at $0.00filing
15 Nov 2024filed 19 Nov 2024MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,098.34 at $0.00filing
1 Oct 2024filed 3 Oct 2024MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—699.42 at $0.00filing
16 Aug 2024filed 20 Aug 2024MPLX Mplx LPMidstream & PipelinesSEC FORM 4 Code A—1,047.63 at $0.00filing

News

JPMorgan Chase & Co. Initiates Coverage on Mplx (NYSE:MPLX)MPLX · tickerreport.com · 20 Oct 2026

0 headlines in the last 90 days name Garry L. Peiffer; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Energy3

Buys in green, sells in red, by the company’s sector.

Related people

Shawn M. LyonSVP Log & Storage, MPLX GP LLC · SVP Log & Storage, MPLX GP LLC at Marathon Petroleum, filing Form 4 there in the last year
Erin M. BrzezinskiVP and Controller · VP and Controller at Marathon Petroleum, filing Form 4 there in the last year
Molly R. BensonChief Legal Ofc & Corp Sec · Chief Legal Ofc & Corp Sec at Marathon Petroleum, filing Form 4 there in the last year
Christopher A. HelmsDirector · Director at Mplx LP, filing Form 4 there in the last year
J. Michael SticeDirector · Director at Mplx LP, filing Form 4 there in the last year