MarketPeel
Insider Trading Intelligence
FS

Frank M. Semple

MPLX
DIRECTOR · MPLX LP · CIK 0001270065
FILING MIX · LIFETIME95%/5%
BUYS
71
SELLS
4
TOTAL VALUE
$2.74M
COMPANIES
3
ACTIVE SINCE
Jan 2020
HOLDINGS NOW
116,666
AVG SELL PX
$33.01
TRADE KIND
SHOWING 75 / 75
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
3 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Frank M. Semple, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d3+66.67%-0.16%-0.24%+0.08%-0.06%
14d3+66.67%-1.14%-1.39%+0.25%+0.80%
30d3+100.00%-2.33%-3.06%+0.73%+2.25%
60d3+0.00%+1.40%+0.08%+1.32%+1.67%
90d3+66.67%+1.90%-7.06%+8.95%+7.06%
180d3+66.67%+3.41%-9.95%+13.36%+9.36%
1y3+0.00%+14.41%-10.84%+25.25%+20.03%
2y3+0.00%+23.98%+6.37%+17.62%+13.83%
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
MPLX · 61,945.951 shares · as of May 15, 2026
097,334194,669292,003389,337202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 71 buys / 4 sellsCOVERAGE · 26 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,194.07461,945.951May 15, 2026May 19, 2026View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
727.74214,719.68Apr 30, 2026May 4, 2026View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
2,579.54360,751.877Apr 30, 2026May 4, 2026View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,071.81858,172.334Feb 17, 2026Feb 19, 2026View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,132.30257,100.516Nov 14, 2025Nov 18, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,050.57455,968.214Aug 15, 2025Aug 19, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
990.05654,917.64May 16, 2025May 20, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
2,848.35253,927.584May 1, 2025May 5, 2025View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
1,275.9613,709.052May 1, 2025May 5, 2025View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
93.58612,433.092Apr 1, 2025Apr 3, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
220.44651,079.232Apr 1, 2025Apr 3, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
887.92850,858.786Feb 14, 2025Feb 18, 2025View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
294.1912,257.643Jan 2, 2025Jan 6, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
737.56149,970.858Jan 2, 2025Jan 6, 2025View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
981.55449,233.297Nov 15, 2024Nov 19, 2024View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
251.02511,891.815Oct 1, 2024Oct 3, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
802.93248,251.743Oct 1, 2024Oct 3, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
932.73647,448.811Aug 16, 2024Aug 20, 2024View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
225.2711,582.362Jul 1, 2024Jul 3, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
830.80746,516.075Jul 1, 2024Jul 3, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
923.70445,685.268May 13, 2024May 15, 2024View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
192.62811,303.601Apr 1, 2024Apr 3, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
862.17344,761.564Apr 1, 2024Apr 3, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
956.53343,899.391Feb 14, 2024Feb 16, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
971.50242,942.858Jan 2, 2024Jan 4, 2024View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
258.43411,060.672Jan 2, 2024Jan 4, 2024View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
987.15341,971.356Nov 13, 2023Nov 15, 2023View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
262.46510,740.639Oct 2, 2023Oct 4, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,014.0940,984.203Oct 2, 2023Oct 4, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
867.82139,970.113Aug 14, 2023Aug 16, 2023View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
334.99210,427.413Jul 3, 2023Jul 5, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
937.22539,102.292Jul 3, 2023Jul 5, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
852.76138,165.067May 15, 2023May 17, 2023View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
290.2910,025.507Apr 3, 2023Apr 5, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
916.47537,312.306Apr 3, 2023Apr 5, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
796.46736,395.831Feb 14, 2023Feb 16, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
978.36135,599.364Jan 3, 2023Jan 5, 2023View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
354.9869,678.748Jan 3, 2023Jan 5, 2023View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
772.934,621.003Nov 22, 2022Nov 23, 2022View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
383.0639,261.304Oct 3, 2022Oct 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,049.90133,848.103Oct 3, 2022Oct 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
698.04632,798.202Aug 12, 2022Aug 16, 2022View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
466.0878,827.013Jul 1, 2022Jul 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,074.6832,100.156Jul 1, 2022Jul 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
692.73131,025.476May 13, 2022May 17, 2022View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
464.2738,316.404Apr 1, 2022Apr 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
953.77130,332.745Apr 1, 2022Apr 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
611.6129,378.974Feb 14, 2022Feb 16, 2022View →
MPLX
MPLX LP
SALE
28,000$34.00$952.0K333,337Feb 2, 2022Feb 3, 2022View →
MPLX
MPLX LP
SALE
28,000$33.00$924.0K361,337Feb 1, 2022Feb 3, 2022View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
599.687,794.123Jan 3, 2022Jan 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,064.98528,767.364Jan 3, 2022Jan 5, 2022View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,145.31827,702.379Nov 19, 2021Nov 23, 2021View →
MPLX
MPLX LP
SALE
27,000$32.00$864.0K389,337Nov 8, 2021Nov 10, 2021View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
619.4937,129.517Oct 1, 2021Oct 5, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,101.41726,557.061Oct 1, 2021Oct 5, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
605.61525,455.644Aug 13, 2021Aug 17, 2021View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
642.6476,444.3Jul 1, 2021Jul 2, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,068.19724,850.029Jul 1, 2021Jul 2, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
556.54923,781.832May 14, 2021May 18, 2021View →
MPC
MARATHON PETROLEUM CORP
PURCHASEGRANT
Stock grant
484.475,749.092May 3, 2021May 5, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
112.66723,225.283May 3, 2021May 5, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,052.83323,112.616Apr 1, 2021Apr 5, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
599.5122,059.783Feb 12, 2021Feb 16, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,251.70721,460.273Jan 4, 2021Jan 6, 2021View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
674.84620,208.566Nov 13, 2020Nov 17, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,773.0519,533.72Oct 1, 2020Oct 5, 2020View →
HYLN
HYLIION HOLDINGS CORP.
SALE
40,0000Oct 1, 2020Oct 5, 2020View →
HYLN
HYLIION HOLDINGS CORP.
PURCHASE
40,00040,000Oct 1, 2020Oct 5, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
596.57817,760.67Aug 14, 2020Aug 18, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,586.84417,164.092Jul 1, 2020Jul 6, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
568.51315,577.248May 15, 2020May 19, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
2,412.28115,008.735Apr 1, 2020Apr 3, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
350.50312,596.454Feb 14, 2020Feb 18, 2020View →
MPLX
MPLX LP
PURCHASEGRANT
Stock grant
1,061.77612,245.951Jan 2, 2020Jan 6, 2020View →
Other insiders · MPLX
Loading peer insiders…
About this filer
CIK 0001270065
ROLE
Director
PRIMARY
MPLX
COMPANIES
3
ACTIVE SINCE
Jan 2020
MARKETPEEL · /INSIDER/0001270065DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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