BLAIR WILLIAM & CO/IL

Position in MPC — Marathon Petroleum Corp

CIK 902367 CHICAGO, IL

Position in MPC

as of Jun 30, 2026 · filed Aug 11, 2026 Compact

Position Value

$11,018,098

+$974,487 QoQ

Shares Held

43,095

+4.8% QoQ

Ownership

0.015%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

#269

of 1,922 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 83% Shared 0% None 17%

Energy · as of Jun 30, 2026

BLAIR WILLIAM & CO/IL holds $57,563,229 across 6 Oil & Gas Refining & Marketing names. MPC ranks #3 (19.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PSX	Phillips 66	204,103	$34,503,612
2	VLO	Valero Energy Corp/Tx	43,940	$11,443,733
3	MPC	Marathon Petroleum Corp This page	43,095	$11,018,098
4	SUN	Sunoco LP	3,775	$254,812
5	PBF	PBF Energy Inc.	4,852	$220,863
6	UGP	Ultrapar Holdings Inc	24,325	$122,111

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$11,018,098	43,095	+4.8%	Shares	Sole	2026-08-11
2026-03-31	$10,043,611	41,132	-24.3%	Shares	Sole	2026-05-08
2025-12-31	$8,838,777	54,349	+22.7%	Shares	Sole	2026-02-17
2025-09-30	$8,540,309	44,310	-2.4%	Shares	Sole	2025-11-12
2025-06-30	$7,542,390	45,406	-9.5%	Shares	Sole	2025-07-24
2025-03-31	$7,309,121	50,169	-5.6%	Shares	Sole	2025-05-09
2024-12-31	$7,414,564	53,151	+10.2%	Shares	Sole	2025-02-12
2024-09-30	$7,859,267	48,243	-5.5%	Shares	Sole	2024-11-12
2024-06-30	$8,851,990	51,026	-1.8%	Shares	Sole	2024-08-12
2024-03-31	$10,468,529	51,953	-0.9%	Shares	Sole	2024-05-09
2023-12-31	$7,775,992	52,413	+4.0%	Shares	Sole	2024-02-12
2023-09-30	$7,624,509	50,380	-1.5%	Shares	Sole	2023-11-09
2023-06-30	$5,965,605	51,163	-2.9%	Shares	Sole	2023-08-11
2023-03-31	$7,102,305	52,676	+0.3%	Shares	Sole	2023-05-12
2022-12-31	$6,112,104	52,514	-0.3%	Shares	Sole	2023-02-10
2022-09-30	$5,229,327	52,646	+0.2%	Shares	Sole	2022-11-09
2022-06-30	$4,321,533	52,567	-4.2%	Shares	Sole	2022-08-10
2022-03-31	$4,693,180	54,891	-5.2%	Shares	Sole	2022-05-13
2021-12-31	$3,704,829	57,897	+245.2%	Shares	Sole	2022-02-14
2021-09-30	$1,036,739	16,773	+6.1%	Shares	Sole	2021-11-12
2021-06-30	$955,300	15,811	-17.6%	Shares	Sole	2021-08-12
2021-03-31	$1,026,152	19,184	+2.9%	Shares	Sole	2021-05-13
2020-12-31	$771,157	18,645	-8.9%	Shares	Sole	2021-02-09
2020-09-30	$600,296	20,460	+65.4%	Shares	Sole	2020-11-06
2020-06-30	$462,278	12,367	-6.3%	Shares	Sole	2020-08-12
2020-03-31	$311,689	13,196	—	Shares	Sole	2020-05-11
No filing history on record for this holder in this stock.