Institutional holders increased MPC positions by $17.93B in Q1 2026, with 915 net buyers against 792 net sellers, while insiders recorded zero purchases and only $1.02M in sales — a negligible counter signal.

Confirmation

A single insider purchase within the next 30 days would confirm the bullish conviction.

Invalidation Risk

An abrupt reversal to net institutional outflow in the coming quarter would invalidate this verdict.

The above is AI-generated from public regulatory filings and summarizes historical data only. It is not investment advice and should not be used as the basis for any buy or sell decision.

Insider Trading (Form 4)

90d confidence

unique buyers

—

buy value

data as of 2026-07-16

12-Month Buy/Sell Activity

Mar 25

Feb 26

BuySell

操作	內部人	職稱	交易日	金額
賣出	Hessling Ricky D.	Chief Commercial Officer	2026-03-13	$371K
賣出	Hessling Ricky D.	Chief Commercial Officer	2026-03-12	$109K
賣出	Hessling Ricky D.	Chief Commercial Officer	2026-03-12	$129K
賣出	Hessling Ricky D.	Chief Commercial Officer	2026-03-11	$73K
賣出	Hessling Ricky D.	Chief Commercial Officer	2026-03-11	$333K
賣出	Henschen Michael A II	Ex VP, Refining	2026-02-12	$1.07M
賣出	Benson Molly R	Chief Legal Ofc & Corp Sec	2025-08-15	$1.77M
賣出	Rucker Kim K.W.	Director	2025-07-03	$1.29M

View all insider trades →

Form 144 Pre-Sale Notices

Filings (90d)

$1.70M

Total Est. Value

6K shares

Planned Shares

Last Filed 2026-06-04

Filer	Title/Relationship	Filing Date	Planned Shares	Est. Value
Henschen Michael A II	Officer	2026-06-04	6K shares	$1.70M

Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

FAQ

Who are the top institutional investors holding MARATHON PETROLEUM CORP (MPC)?

Major stakeholders currently include BlackRock, Inc. ($6.0B), Vanguard Capital Management LLC ($4.7B), State Street CORP ($4.6B). Based on the latest 13F filings, there are a total of 1918 tracked investment funds and institutions maintaining positions in MPC.

What is the overall institutional sentiment toward MPC recently?

Institutional sentiment appears Bullish (Net Buying). During the most recent reporting quarter, the stock experienced a net inflow of $17.9B, driven by 916 managers accumulating shares while 792 reduced their exposure.

Which institutions have been selling or reducing their MPC positions?

In the latest period, 683 funds trimmed their holdings, and 109 managers completely exited their positions. The aggregate reported sell value was $15.0B.

Are there any notable investors adding MPC to their portfolios?

Yes, buying activity remains notable. 334 institutions opened new positions in {ticker}, and 582 existing holders added to their shares. The total reported buy value for the quarter amounted to $28.4B.