Marathon Petroleum (MPC) is down 6.12% at $401.20 in Wednesday's session, as TheStreet reported that the refiner's free cash flow dropped sharply from a year earlier. The decline follows a quarter in which the company also disclosed a new buyback authorization, according to a StreetInsider filing summary.
| Measure | Value |
|---|---|
| Price | $401.20 |
| Change from the prior close | -6.12% |
| Prior close | $427.34 |
| Today's range | $400.85 – $420.00 |
| 52-week range | $161.93 – $493.98 |
| Market value | $112.67 billion |
Source: Stock quote during the regular session · as of November 4, 2026 at 10:00 AM ET
What was reported
TheStreet reported that Marathon Petroleum's free cash flow, the cash remaining after operating and investing in the business, fell 64% from a year earlier to $554 million, which it said was roughly half what analysts had expected. The outlet added that a large share of cash was tied up in inventory, which it said has climbed sharply since the end of last year, and noted the company faces a quarter with $17 billion in activity ahead that could show whether that inventory converts back into cash.
A regulatory filing summarized by StreetInsider showed that Marathon Petroleum's board authorized a new buyback program worth billions of dollars, layered on top of a similar-sized authorization the company had approved earlier in the year, with no set expiration date and future purchases tied to business conditions and available cash.
Separately, GlobeNewsWire reported that Castor Maritime said its subsidiary, MPC Oceanic Group, agreed to acquire a 41% stake in ship management firm Marlow Navigation, a corporate action unrelated to Marathon Petroleum, which uses a similar “MPC” short name.
Traders on X were noted to be weighing in on Marathon Petroleum's share price alongside other refiners and oil producers, with commentary tying the day's move to broader weakness across the energy sector and to adjustment following earnings and a recent refinery sale, rather than pointing to a single explanation specific to the stock.
Its suppliers and customers
Company filings list Baker Hughes (BKR) as a supplier to Marathon Petroleum; its shares are down 3.45% today. Enbridge (ENB), also listed as a supplier, is down 0.55%. E1, listed as a customer, has no quote available today. These moves are not evidence of any link to Marathon Petroleum's share price action.
Source: Relationships named in company filings (Earnings call transcript); stock quotes · as of November 4, 2026 at 10:00 AM ET · A supplier or customer moving the same day is not evidence that one move caused the other.