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MPC
NYSE Energy & Transportation

Marathon Galveston Bay Refinery Reports Leak, Emissions Exceed Reportable Quantity

Tom Rudovsky · Reported by Reuters
More coverage: Oil & Gas Stocks · Energy
Sentiment info
Negative
Importance info
7
Price
$325
Mkt Cap
$92.199B
52W Low
$158
52W High
$326.92
52W Position info
106% above low
Off High info
at 52W high
Rel. Volume info
1.1× avg
Market data snapshot near publication time

MPC has more than doubled off its 52-week low of $158.

Summary

A leak from the Tank 111 mixer seal at Marathon's 631,000 bpd Galveston Bay refinery caused air emissions above the reportable quantity. The release was isolated and stopped. This follows a series of operational incidents at the same facility — a small fire in June and an FCC trip in late June — raising concerns about reliability at a key asset. The refinery is critical to Marathon's Gulf Coast operations, and repeated disruptions could pressure throughput and margins. No duration or volume impact has been disclosed yet.

At the time of this announcement, MPC was trading at $325.00 on NYSE in the Energy & Transportation sector, with a market capitalization of approximately $92.2B. The 52-week trading range was $158.00 to $326.92. This news item was assessed with negative market sentiment and an importance score of 7 out of 10. Source: Reuters.


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MPC - Latest Insights

MPC
Jul 10, 2026, 4:35 PM EDT
Source: Reuters
Importance Score:
8
Price at Filing: $283.74
Real-time Price: $321.58 info
Change: +$37.84 (+13%) info
Market Cap: $92.199B info
MPC
Jul 06, 2026, 4:38 PM EDT
Source: Reuters
Importance Score:
8
Price at Filing: $268.99
Real-time Price: $321.58 info
Change: +$52.59 (+20%) info
Market Cap: $92.199B info
MPC
Jul 06, 2026, 1:22 PM EDT
Source: Reuters
Importance Score:
7
Price at Filing: $269.74
Real-time Price: $321.58 info
Change: +$51.84 (+19%) info
Market Cap: $92.199B info
MPC
Jun 23, 2026, 5:05 PM EDT
Source: dpa-AFX
Importance Score:
7
Price at Filing: $244.32
Real-time Price: $321.58 info
Change: +$77.26 (+32%) info
Market Cap: $92.199B info
MPC
Jun 23, 2026, 3:13 AM EDT
Source: Wiseek News
Importance Score:
8
Price at Filing: $247.99
Real-time Price: $321.58 info
Change: +$73.59 (+30%) info
Market Cap: $92.199B info