Marathon Petroleum MPC

$397.15

+$8.77 (+2.26%)

Market open · Sep 24, 1:10 pm ET

After hours $388.99 +0.16%

Open$393.15

Prev close$388.38

Day range$387.74 – $401.09

Volume884.7K

Market cap$111.53B

P/E (TTM)13.8

Dividend yield0.98%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership78.8%+0.51 pts vs. prior quarter

Institutions holding2,167-7 vs. prior quarter

Insider trades (recent)10 buys / 6 sellsNet buying

Short interest2.71% of floatDays to cover 3.0 · as of 31 Aug 2026

Short-sale volume share29.4%5-day average of daily volume

Net of large-order buying minus selling, in USD. Over this window: −$85.37M (4 inflow days, 16 outflow days).

Institutional holders2,167

Institutional ownership78.8%

Total transactions25

Bought10

Sold6

Report date	Shares short	% of float	Days to cover
31 Aug 2026	7,601,383	2.7%	3.0
14 Aug 2026	6,521,760	2.3%	2.5
31 Jul 2026	6,786,536	2.3%	3.4
15 Jul 2026	6,412,255	2.2%	3.2
30 Jun 2026	7,290,864	2.5%	2.6
15 Jun 2026	7,673,768	2.6%	3.3