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Mplx LP (MPLX)

Mplx LP (MPLX) Insider Trading

Directors, officers and holders of more than 10% of MPLX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 149 transactions on file: 0 with code P, 0 with code S and 50 with other codes.

DateInsiderCodeShares
Aug 14, 2026STICE J MICHAELA Award983
Aug 14, 2026SEMPLE FRANK MA Award1,073
Aug 14, 2026Walker Ray N JRA Award82
Aug 14, 2026SURMA JOHN PA Award1,563
Aug 14, 2026Peiffer Garry L.A Award1,232
Aug 14, 2026HELMS CHRISTOPHER AA Award1,337
Aug 14, 2026Breves Christine SA Award219
May 15, 2026Walker Ray N JRA Award78
May 15, 2026STICE J MICHAELA Award1,098
May 15, 2026SURMA JOHN PA Award1,656
May 15, 2026Peiffer Garry L.A Award1,304
May 15, 2026SEMPLE FRANK MA Award1,194
May 15, 2026Breves Christine SA Award277
May 15, 2026HELMS CHRISTOPHER AA Award1,415
Apr 30, 2026Peiffer Garry L.A Award2,247
Apr 30, 2026HELMS CHRISTOPHER AA Award2,696
Apr 30, 2026SEMPLE FRANK MA Award2,580
Apr 30, 2026SURMA JOHN PA Award2,580
Apr 30, 2026STICE J MICHAELA Award2,580
Apr 30, 2026Breves Christine SA Award2,696
Apr 30, 2026Walker Ray N JRA Award2,696
Apr 30, 2026Walker Ray N JRA Award2,247
Apr 30, 2026Peiffer Garry L.A Award2,696
Apr 30, 2026Breves Christine SA Award2,247
Apr 30, 2026SURMA JOHN PA Award3,029
Apr 30, 2026STICE J MICHAELA Award3,029
Apr 30, 2026HELMS CHRISTOPHER AA Award2,247
Apr 30, 2026SEMPLE FRANK MA Award3,029
Mar 2, 2026Floerke Gregory ScottF Tax Payment995
Mar 2, 2026Floerke Gregory ScottF Tax Payment1,100
Mar 2, 2026HAGEDORN CARL KRISTOPHERF Tax Payment422
Mar 2, 2026Lyon Shawn MF Tax Payment1,033
Mar 2, 2026Benson Molly RF Tax Payment614
Mar 2, 2026Lyon Shawn MF Tax Payment920
Mar 2, 2026Benson Molly RF Tax Payment1,240
Mar 2, 2026Mannen Maryann T.F Tax Payment3,404
Mar 2, 2026Benson Molly RF Tax Payment998
Mar 2, 2026Mannen Maryann T.F Tax Payment3,407
Mar 2, 2026HAGEDORN CARL KRISTOPHERF Tax Payment916
Mar 2, 2026HAGEDORN CARL KRISTOPHERF Tax Payment663
Mar 2, 2026Floerke Gregory ScottF Tax Payment797
Mar 2, 2026Mannen Maryann T.F Tax Payment6,409
Mar 2, 2026Lyon Shawn MF Tax Payment798
Mar 1, 2026HAGEDORN CARL KRISTOPHERA Award4,930
Mar 1, 2026Khoury Maria AA Award8,451
Mar 1, 2026Lyon Shawn MA Award5,986
Mar 1, 2026Mannen Maryann T.A Award52,817
Mar 1, 2026Floerke Gregory ScottA Award5,986
Mar 1, 2026Benson Molly RA Award8,803
Feb 17, 2026Breves Christine SA Award218

The full Form 4 history is on the MPLX company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.