Marathon Petroleum: which funds bought and sold

Institutions that bought and sold Marathon Petroleum shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 830 institutions that filed 13F reports for both quarters added to or opened positions in Marathon Petroleum, and 797 cut or closed them. Together they sold a net 4.4M shares, −2.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 4.4M shares (−13.6%); index fund managers were net buyers of 1.3M shares (+1.4%). 148 opened a new position and 93 sold out entirely.

Bought, Q2 2026 830 institutions, 148 of them new holders Sold, Q2 2026 797 institutions, 93 of them sold out

Net change, all compared −4.4M shares (−2.0%)

Net change, active managers −4.4M shares (−13.6%), 38 bought, 37 sold

Buyers versus sellers

institutions compared, 1,992

830 bought 365 797 sold

Active managers and hedge funds 38 bought · 37 sold · −4.4M

Index fund managers 4 bought · 8 sold · +1.3M

Other institutions 788 bought · 752 sold · −1.2M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+1.6M +6.6%	26.0M	$6.6B
Victory Capital Management Inc Active manager	+594K +140.4%	1.0M	$260M
American Century Companies Inc Active manager	+562K +363.8%	716K	$183M
Price T Rowe Associates Inc Active manager	+557K +43.4%	1.8M	$470M
Geode Capital Management, LLC Index funds	+530K +6.8%	8.4M	$2.1B
FMR LLC Active manager	+509K +10.4%	5.4M	$1.4B
AQR Capital Management LLC Hedge fund	+396K +91.5%	828K	$212M
BNP Paribas Financial Markets	+372K +62.9%	964K	$247M
Amundi	+333K +17.5%	2.2M	$572M
Australiansuper Pty Ltd	+308K +62.9%	797K	$204M
Bridgewater Associates, LP Hedge fund	+272K +351.9%	349K	$89.3M
Lazard Asset Management LLC Active manager	+255K New position	255K	$65.1M
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	+216K +16.7%	1.5M	$386M
Citadel Advisors LLC Hedge fund	+210K +104.0%	412K	$105M
SG Americas Securities, LLC	+190K +127.0%	340K	$87M
Squarepoint Ops LLC Hedge fund	+185K +50.0%	554K	$142M
HRT Financial LP	+174K New position	174K	$44.4M
UBS Group AG	+168K +10.0%	1.8M	$471M
LSV Asset Management Active manager	+163K +12.7%	1.4M	$369M
California State Teachers Retirement System	+155K +44.5%	504K	$129M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Victory Capital Management Inc Active manager	+594K +140.4%	1.0M	$260M
American Century Companies Inc Active manager	+562K +363.8%	716K	$183M
Price T Rowe Associates Inc Active manager	+557K +43.4%	1.8M	$470M
FMR LLC Active manager	+509K +10.4%	5.4M	$1.4B
AQR Capital Management LLC Hedge fund	+396K +91.5%	828K	$212M
Bridgewater Associates, LP Hedge fund	+272K +351.9%	349K	$89.3M
Lazard Asset Management LLC Active manager	+255K New position	255K	$65.1M
Citadel Advisors LLC Hedge fund	+210K +104.0%	412K	$105M
Squarepoint Ops LLC Hedge fund	+185K +50.0%	554K	$142M
LSV Asset Management Active manager	+163K +12.7%	1.4M	$369M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Harris Associates L P Active manager	−2.6M −91.8%	229K	$58.6M
Wellington Management Group LLP Active manager	−2.4M −42.3%	3.3M	$831M
Boston Partners Active manager	−2.1M −37.8%	3.5M	$906M
Jpmorgan Chase & Co	−700K −20.4%	2.7M	$709M
Canada Pension Plan Investment Board	−610K −54.4%	511K	$131M
State Street Corp Index funds	−553K −2.9%	18.5M	$4.7B
Invesco Ltd.	−488K −17.2%	2.3M	$599M
Holocene Advisors, LP Hedge fund	−290K −70.1%	124K	$31.6M
Two Sigma Investments, LP Hedge fund	−285K −18.7%	1.2M	$317M
Marshall Wace, LLP Hedge fund	−257K −67.1%	126K	$32.2M
Ameriprise Financial Inc	−193K −8.7%	2.0M	$520M
Arrowstreet Capital, Limited Partnership Hedge fund	−187K −45.6%	223K	$57.1M
Morgan Stanley	−186K −3.1%	5.9M	$1.5B
Legal & General Group PLC	−172K −10.3%	1.5M	$381M
Reaves W H & Co Inc	−164K −74.4%	57K	$14.4M
Bank Of America Corp	−163K −6.3%	2.4M	$622M
Acadian Asset Management LLC Active manager	−156K −29.3%	375K	$95.9M
Bank Of Nova Scotia	−142K −55.7%	113K	$29M
Allianz Asset Management Gmbh	−138K −8.1%	1.6M	$399M
Wells Fargo & Company	−130K −15.9%	692K	$177M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Harris Associates L P Active manager	−2.6M −91.8%	229K	$58.6M
Wellington Management Group LLP Active manager	−2.4M −42.3%	3.3M	$831M
Boston Partners Active manager	−2.1M −37.8%	3.5M	$906M
Holocene Advisors, LP Hedge fund	−290K −70.1%	124K	$31.6M
Two Sigma Investments, LP Hedge fund	−285K −18.7%	1.2M	$317M
Marshall Wace, LLP Hedge fund	−257K −67.1%	126K	$32.2M
Arrowstreet Capital, Limited Partnership Hedge fund	−187K −45.6%	223K	$57.1M
Acadian Asset Management LLC Active manager	−156K −29.3%	375K	$95.9M
Los Angeles Capital Management LLC Active manager	−118K −23.6%	383K	$98M
Voleon Capital Management LP Hedge fund	−81K −64.9%	44K	$11.2M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Lazard Asset Management LLCActive manager	255K	$65.1M
HRT Financial LP	174K	$44.4M
Arbejdsmarkedets Tillaegspension	105K	$26.7M
Readystate Asset Management LP	72K	$18.5M
Caxton Associates LLPHedge fund	50K	$12.8M
J. Goldman & Co LPHedge fund	46K	$11.7M
Vega Investment Solutions	43K	$11.1M
LMR Partners LLPHedge fund	41K	$10.5M
Winton Group LtdHedge fund	36K	$9.2M
Trek Financial, LLC	32K	$8.2M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Ofi Invest Asset Management	104K	$22M
Exoduspoint Capital Management, LPHedge fund	50K	$12.2M
Campbell & Co Investment Adviser LLC	33K	$8M
Purpose Unlimited Inc.	23K	$5.7M
Panview Capital Ltd	22K	$5.3M
Arrow Capital Pty Ltd	20K	$4.9M
Bochk Asset Management Ltd	11K	$2.6M
Virtu Financial LLC	11K	$2.6M
Sciencast Management LP	9,423	$2.3M
Encore Global Management, LP	8,750	$2.1M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 1,926
Ten largest holders: 51.2%
Index fund managers: 43.7%
Active managers and hedge funds: 12.7%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	38	37	9	5	−4.4M	−13.6%
Index fund managers	4	8	0	0	+1.3M	+1.4%
Other institutions	788	752	139	88	−1.2M	−1.3%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Marathon Petroleum.

Only managers that filed a holdings report for both quarters are compared (1,992 here). 61 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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