There is a long list of 1578 institutional holders of MPC within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of MPC by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-MPC table below, the initial column indicates the name of each top institutional holder of MPC, with a link to that fund's top holdings. The next columns indicate the amount of MPC stock held by each of the institutional holders of MPC, followed by the MPC position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Vanguard Group Inc.	35,743,147	$5,302,853	12/31/2023
MPC	35,743,147	$5,302,853	12/31/2023
BlackRock Inc.	30,923,676	$4,587,837	12/31/2023
MPC	30,923,676	$4,587,837	12/31/2023
State Street Corp	25,099,168	$3,723,713	12/31/2023
MPC	25,099,168	$3,723,713	12/31/2023
Elliott Investment Management L.P.	11,065,000	$1,641,603	12/31/2023
MPC	11,065,000	$1,641,603	12/31/2023
Morgan Stanley	7,399,190	$1,097,744	12/31/2023
MPC	7,399,190	$1,097,744	12/31/2023
Geode Capital Management LLC	7,371,346	$1,092,165	12/31/2023
MPC	7,371,346	$1,092,165	12/31/2023
Bank of New York Mellon Corp	4,788,306	$964,844	03/31/2024
MPC	4,788,306	$964,844	03/31/2024
Raymond James & Associates	4,178,977	$842,064	03/31/2024
MPC	4,178,977	$842,064	03/31/2024
Ameriprise Financial Inc.	5,293,885	$785,700	12/31/2023
MPC	5,293,885	$785,700	12/31/2023
Dimensional Fund Advisors LP	5,153,636	$764,526	12/31/2023
MPC	5,153,636	$764,526	12/31/2023
FMR LLC	4,904,214	$727,589	12/31/2023
MPC	4,904,214	$727,589	12/31/2023
Northern Trust Corp	4,118,251	$610,984	12/31/2023
MPC	4,118,251	$610,984	12/31/2023
Invesco Ltd.	3,550,989	$526,825	12/31/2023
MPC	3,550,989	$526,825	12/31/2023
Legal & General Group Plc	3,389,419	$502,854	12/31/2023
MPC	3,389,419	$502,854	12/31/2023
Norges Bank	3,374,797	$500,685	12/31/2023
MPC	3,374,797	$500,685	12/31/2023
Amundi	3,116,263	$475,415	12/31/2023
MPC	3,116,263	$475,415	12/31/2023
Price T Rowe Associates Inc. MD	3,049,858	$452,478	12/31/2023
MPC	3,049,858	$452,478	12/31/2023
Bank of America Corp DE		$452,233	12/31/2023
MPC	2,623,917	$389,284	12/31/2023
Call	799,300	$118,584	12/31/2023
Put	375,000	$55,635	12/31/2023
Raymond James Financial Services Advisors Inc.	2,137,720	$430,751	03/31/2024
MPC	2,137,720	$430,751	03/31/2024
Boston Partners	2,764,574	$410,616	12/31/2023
MPC	2,764,574	$410,616	12/31/2023
Goldman Sachs Group Inc.		$382,519	12/31/2023
MPC	2,578,319	$382,519	12/31/2023
Put	6,100	$905	12/31/2023
Call	6,100	$905	12/31/2023
Principal Financial Group Inc.	2,503,421	$371,408	12/31/2023
MPC	2,503,421	$371,408	12/31/2023
Charles Schwab Investment Management Inc.	2,416,402	$358,497	12/31/2023
MPC	2,416,402	$358,497	12/31/2023
Royal Bank of Canada		$351,279	12/31/2023
MPC	2,365,740	$350,982	12/31/2023
Call	2,000	$297	12/31/2023
Pacer Advisors Inc.	2,341,364	$347,365	12/31/2023
MPC	2,341,364	$347,365	12/31/2023
US Bancorp DE	2,228,106	$330,562	12/31/2023
MPC	2,228,106	$330,562	12/31/2023
Allianz Asset Management GmbH		$300,349	12/31/2023
MPC	2,055,562	$304,963	12/31/2023
Put	34,700	$5,148	12/31/2023
Call	3,600	$534	12/31/2023
Barclays PLC		$296,773	12/31/2023
MPC	1,717,976	$254,877	12/31/2023
Call	283,200	$42,015	12/31/2023
Put	800	$119	12/31/2023
Qube Research & Technologies Ltd		$286,396	12/31/2023
MPC	1,941,911	$288,102	12/31/2023
Put	48,700	$7,225	12/31/2023
Call	37,200	$5,519	12/31/2023
LSV Asset Management	1,775,821	$263,461	12/31/2023
MPC	1,775,821	$263,461	12/31/2023
JPMorgan Chase & Co.		$257,723	12/31/2023
MPC	1,733,448	$257,174	12/31/2023
Call	51,000	$7,566	12/31/2023
Put	47,300	$7,017	12/31/2023
UBS Asset Management Americas Inc.	1,652,292	$245,134	12/31/2023
MPC	1,652,292	$245,134	12/31/2023
Deutsche Bank AG	1,632,131	$242,143	12/31/2023
MPC	1,632,131	$242,143	12/31/2023
Citadel Advisors LLC		$233,531	12/31/2023
MPC	1,249,185	$185,329	12/31/2023
Call	892,400	$132,396	12/31/2023
Put	567,500	$84,194	12/31/2023
Acadian Asset Management LLC	1,546,045	$229,351	12/31/2023
MPC	1,546,045	$229,351	12/31/2023
AQR Capital Management LLC	1,452,341	$215,469	12/31/2023
MPC	1,452,341	$215,469	12/31/2023
Nuveen Asset Management LLC	1,402,490	$208,073	12/31/2023
MPC	1,402,490	$208,073	12/31/2023
Wellington Management Group LLP	1,391,634	$206,463	12/31/2023
MPC	1,391,634	$206,463	12/31/2023
Sumitomo Mitsui Trust Holdings Inc.	968,905	$195,234	03/31/2024
MPC	968,905	$195,234	03/31/2024
Janus Henderson Group PLC	1,276,866	$189,427	12/31/2023
MPC	1,276,866	$189,427	12/31/2023
Swiss National Bank	1,250,366	$185,504	12/31/2023
MPC	1,250,366	$185,504	12/31/2023
Susquehanna International Group LLP		$183,314	12/31/2023
Call	1,768,200	$262,330	12/31/2023
Put	990,100	$146,891	12/31/2023
MPC	457,502	$67,875	12/31/2023
AustralianSuper Pty Ltd	896,636	$183,281	03/31/2024
MPC	896,636	$183,281	03/31/2024
AGF Management Ltd.	1,220,534	$181,078	12/31/2023
MPC	1,220,534	$181,078	12/31/2023
Jane Street Group LLC		$179,221	12/31/2023
Call	708,700	$105,143	12/31/2023
MPC	534,812	$79,345	12/31/2023
Put	35,500	$5,267	12/31/2023
Canada Pension Plan Investment Board	1,200,520	$178,109	12/31/2023
MPC	1,200,520	$178,109	12/31/2023
Millennium Management LLC		$152,931	12/31/2023
MPC	1,106,104	$164,102	12/31/2023
Put	356,000	$52,816	12/31/2023
Call	280,700	$41,645	12/31/2023
Bank of Montreal Can	998,384	$148,630	12/31/2023
MPC	998,384	$148,630	12/31/2023
National Pension Service	969,120	$143,779	12/31/2023
MPC	969,120	$143,779	12/31/2023
Renaissance Technologies LLC	958,775	$142,244	12/31/2023
MPC	958,775	$142,244	12/31/2023