Impact ledger

Marathon Petroleum Corporation (MPC)

23 events mapped to this ticker since 2026-06-13.

Assumption changes

Date	Assumption	Direction	Magnitude	Conf.
2026-06-29	share_count	Bullish	—	0.70
2026-06-29	net_debt	Bullish	—	0.70
2026-06-29	revenue	Bullish	—	0.70

Event impact log

Date	Event	Channel	Direction	Horizon	Impact
2026-07-16	Event	Peer action in the refining sector may put pressure on other refiners to demonstrate similar capital return policies to maintain investor appeal.	watch	1-3m	0.30
2026-07-14	Event	Higher crude input costs could compress refining margins, but increased product prices might offset. Uncertainty around crack spreads.	mixed	1-3m	0.60
2026-07-14	Event	Higher crude oil prices increase input costs for refining, potentially compressing crack spreads, but also increase the value of refined products. Overall impact is uncertain and depends on crack spread dynamics.	mixed	1-3m	0.60
2026-07-11	Event	Wider refining crack spreads driven by geopolitical events, improving the profitability of refining operations.	Bullish	1-3m	0.70
2026-07-09	Event	Higher crude input costs could compress refining margins, but increased product prices might offset. Potential for inventory gains.	mixed	1-3m	0.40
2026-07-07	Event	Similar to other refiners, MPC's profitability could be directly targeted by price-gouging investigations, potentially leading to government-imposed price controls or fines that erode downstream earnings.	Bearish	1-3m	0.60
2026-07-07	Event	Increased political scrutiny on refining margins and potential for price controls on gasoline.	Bearish	1-3m	0.60
2026-07-07	Event	While primarily a refiner, lower crude input costs could benefit, but the 'price-gouging probe' and demand for lower 'gas prices' could squeeze refining margins if retail prices are capped more aggressively than crude input costs fall.	Bearish	1-3m	0.60
2026-07-07	Event	Potential for price controls or increased regulatory oversight on refined product margins, impacting profitability.	Bearish	3-12m	0.50
2026-07-07	Event	As a major refiner and retailer, MPC is vulnerable to policies aimed at controlling retail gas prices and investigations into 'price gouging,' potentially compressing margins.	Bearish	1-3m	0.60
2026-07-07	Event	Refining margins could be compressed by 'restrictive pricing mandates' on gasoline, impacting profitability.	Bearish	3-12m	0.70
2026-07-07	Event	Increased regulatory scrutiny on refining margins, potential for price caps on refined products, and public pressure.	Bearish	3-12m	0.70
2026-06-30	Event	Similar to Phillips 66, lower crude oil prices could improve refining profitability by reducing feedstock costs. The stability could also benefit logistics operations.	mixed	1-3m	0.40
2026-06-30	Event	Lower crude oil prices could reduce input costs for refining, but also potentially compress crack spreads if product prices fall faster. Reduced volatility might stabilize operations.	mixed	1-3m	0.40
2026-06-30	Event	Similar to Phillips 66, refining margins could see mixed effects from potentially lower crude prices and ongoing shipping cost/disruption risks in key supply routes.	watch	1-3m	0.40
2026-06-29	Event	Similar to Valero, Marathon Petroleum is a significant refiner. The reported NAV of a gasoline fund, by reflecting gasoline prices, can provide an indication of the market environment for refined products, which directly influences MPC's refining segment profitability.	watch	1-3m	0.50
2026-06-29	Event	Direct financial impact from acquisition/agreement terms, potential changes in operational structure, and market reaction to the news.	watch	1-3m	0.80
2026-06-29	Event	As a pure-play refiner, Marathon Petroleum is highly sensitive to crack spreads (the difference between crude oil and refined product prices). Falling gasoline prices, as suggested by UGA's loss, would directly compress these spreads, negatively impacting MPC's profitability.	Bearish	1-3m	0.70
2026-06-26	Event	Similar to PSX, lower crude costs could boost refining margins, but overall demand for refined products might be affected by economic slowdowns linked to energy sector contraction.	mixed	1-5y	0.60
2026-06-26	Event	Marathon Petroleum, a large US refiner, could also benefit from higher jet fuel crack spreads and increased demand for its products in the wake of the Pennsylvania refinery fire.	Bullish	1-3m	0.50
2026-06-22	Event	Lower crude oil input costs could improve refining margins, but falling product prices might offset this. Short-term price drop could be beneficial for crack spreads.	mixed	1-5d	0.50
2026-06-19	Event	While Heppner remains CSO at MPC, his appointment to another public company's board could potentially divert some focus, though this is generally a minor concern for a large corporation. It could also be seen as a positive reflection on MPC's talent development.	watch	1-3m	0.10
2026-06-13	Event	Increased crude oil input costs for refining, potentially negative for refining margins, but also has midstream segment (MPLX) that could benefit from logistical constraints.	mixed	1-3m	0.60

This ledger is regenerated from Market Ontology's public event pipeline. For live alerts on new assumption changes for MPC, start a trial or view the MPC entity page.