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Is Marathon Petroleum Stock Still a Buy After More Than Doubling YTD?
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Key Takeaways
Marathon Petroleum jumped 138.6% YTD, powered by strong refining execution and record-high momentum.
MPC achieved 112% second-quarter R&M margin capture, with unplanned downtime at a decade low.
MPC returned over $2.8 billion to shareholders as MPLX added stable, growing midstream cash flows.
Refining stocks have quietly emerged as one of 2026’s standout trades, with Marathon Petroleum Corporation (MPC - Free Report) leading the charge. As one of the largest U.S. refiners, MPC has secured a spot among the top 10 best-performing companies in the S&P 500 and ranks as the best-performing Oil/Energy stock, delivering an impressive 138.6% return since the start of the year. The stock has also repeatedly surpassed its previous all-time highs, underscoring its remarkable momentum and investor appeal.
Marathon Petroleum has outperformed major refining peers, including Valero Energy Corporation (VLO - Free Report) and Phillips 66 (PSX - Free Report) , whose shares gained 127.6% and 97.3%, respectively, over the same period.
Image Source: Zacks Investment Research
The sharp rise in MPC’s stock price highlights the success of its strategic initiatives and its resilience in navigating a challenging market environment.
However, after such a sharp rally, investors are left wondering whether the stock still offers meaningful upside. Let’s delve deeper.
MPC Outperforms Benchmark Refining Economics
A key reason to favor MPC is that its earnings are increasingly driven by strong operational execution, rather than relying solely on favorable commodity prices. In the second quarter, Marathon Petroleum achieved an R&M margin capture rate of 112%, bringing first-half capture to 108%. Management attributed the strong performance to crude optimization, robust clean-product margins and effective commercial and operational execution.
Operational reliability also improved significantly, with year-to-date unplanned downtime at its lowest level in a decade. Gulf Coast refinery utilization reached 100% in the second quarter, while MPC generated more than $1 billion in R&M margin capture across its system.
MPC processed nearly 3 million barrels per day at 94% utilization, with Gulf Coast and West Coast operations each delivering more than $27 per barrel of R&M-adjusted EBITDA. Its extensive logistics network provides access to diverse crude supplies, including Venezuelan and Western Canadian crude, supporting feedstock flexibility and profitability through changing market conditions.
Valero Energy offers similar strong exposure to refining and can benefit from tight refined-product markets. Phillips 66 has a somewhat more diversified business model, with exposure to refining, midstream and chemicals.
MPC is selectively investing in projects aimed at increasing yields, improving product flexibility and strengthening refinery competitiveness, providing potential upside beyond the current refining cycle.
During the second quarter, MPC completed its El Paso yield improvement and Robinson product flexibility projects. The El Paso upgrades to the FCC and alkylation units are expected to support higher volumes and strengthen its position across the El Paso, Phoenix and Mexico markets. Meanwhile, the Robinson project adds approximately 10,000 barrels per day of incremental jet fuel capacity. Management expects these projects to generate returns of 25% or higher.
MPC also has a significant project pipeline, including a 90,000-barrel-per-day distillate hydrotreater at Galveston Bay and feedstock optimization at Garyville that could raise crude throughput by 30,000 barrels per day.
Importantly, MPC expects 2026 standalone capital spending of $1.5 billion, with about 65% allocated to value-enhancing projects, underscoring disciplined capital allocation and potential long-term earnings growth.
MPC’s Cash Flow and MPLX Strengthen Shareholder Returns
MPC’s investment case benefits from a powerful combination of refining upside, strong cash generation and growing midstream cash flows through MPLX. In the second quarter, MPC generated $8.46 billion in adjusted EBITDA and about $6.6 billion in operating cash flow, excluding working-capital changes. The company returned more than $2.8 billion to its shareholders, including $2.5 billion in share repurchases.
MPC also maintains significant financial flexibility, with about $7.8 billion of consolidated cash and no borrowings under its $5 billion revolving credit facility. Excluding MPLX, liquidity stood at approximately $11.7 billion, while $6.1 billion remained under the share repurchase authorization.
Meanwhile, MPLX provides a more stable source of cash flow. Its 2026 growth capital was raised to $2.9 billion, with mid-single-digit adjusted EBITDA growth expected. Investments across the Permian and Marcellus are expected to support 12.5% annual distribution growth in 2026 and 2027. This diversified cash-flow base can support dividends, buybacks and long-term shareholder value.
MPC's Positive Earnings Momentum
Over the past 60 days, the Zacks Consensus Estimate for Marathon Petroleum’s 2026 earnings rose 41.6% to $46.66 per share, while the same for 2027 increased 36% to $35.01. The upward revisions indicate that analysts are becoming more confident in the company's earnings potential.
Image Source: Zacks Investment Research
Challenges for Marathon Petroleum Stock
MPC’s biggest risk is that today’s exceptional refining margins may not last. R&M EBITDA surged, but margins could weaken as outages decline and product supplies improve. Geopolitical disruptions and tight diesel markets may also ease. Additionally, expected $290 million in third-quarter turnaround costs could pressure margins, leaving the stock vulnerable. Furthermore, MPC’s valuation, trading at a forward price-to-sales ratio of 0.81, reflects a premium when compared with Valero Energy and Phillips 66.
Image Source: Zacks Investment Research
Conclusion: MPC Still a Buy
This Zacks Rank #2 (Buy) company remains an attractive investment with its sharp 138.6% year-to-date surge, ahead of its competitors — Valero Energy and Phillips 66. Strong operational execution, a high second-quarter R&M margin capture rate and decade-low unplanned downtime highlight the company’s improving efficiency. High-return refinery projects, disciplined capital allocation and robust cash generation provide additional upside, while MPLX adds stability through growing midstream cash flows.
However, cyclical refining margins, turnaround costs and a premium valuation pose risks. Overall, Marathon Petroleum stands out as a good investment opportunity for investors seeking strong fundamentals and shareholder returns, provided they can tolerate geopolitical and commodity-driven risks.
View the Zacks #1 Rank List
Image: Bigstock
Is Marathon Petroleum Stock Still a Buy After More Than Doubling YTD?
Key Takeaways
Refining stocks have quietly emerged as one of 2026’s standout trades, with Marathon Petroleum Corporation (MPC - Free Report) leading the charge. As one of the largest U.S. refiners, MPC has secured a spot among the top 10 best-performing companies in the S&P 500 and ranks as the best-performing Oil/Energy stock, delivering an impressive 138.6% return since the start of the year. The stock has also repeatedly surpassed its previous all-time highs, underscoring its remarkable momentum and investor appeal.
Marathon Petroleum has outperformed major refining peers, including Valero Energy Corporation (VLO - Free Report) and Phillips 66 (PSX - Free Report) , whose shares gained 127.6% and 97.3%, respectively, over the same period.
Image Source: Zacks Investment Research
The sharp rise in MPC’s stock price highlights the success of its strategic initiatives and its resilience in navigating a challenging market environment.
However, after such a sharp rally, investors are left wondering whether the stock still offers meaningful upside. Let’s delve deeper.
MPC Outperforms Benchmark Refining Economics
A key reason to favor MPC is that its earnings are increasingly driven by strong operational execution, rather than relying solely on favorable commodity prices. In the second quarter, Marathon Petroleum achieved an R&M margin capture rate of 112%, bringing first-half capture to 108%. Management attributed the strong performance to crude optimization, robust clean-product margins and effective commercial and operational execution.
Operational reliability also improved significantly, with year-to-date unplanned downtime at its lowest level in a decade. Gulf Coast refinery utilization reached 100% in the second quarter, while MPC generated more than $1 billion in R&M margin capture across its system.
MPC processed nearly 3 million barrels per day at 94% utilization, with Gulf Coast and West Coast operations each delivering more than $27 per barrel of R&M-adjusted EBITDA. Its extensive logistics network provides access to diverse crude supplies, including Venezuelan and Western Canadian crude, supporting feedstock flexibility and profitability through changing market conditions.
Valero Energy offers similar strong exposure to refining and can benefit from tight refined-product markets. Phillips 66 has a somewhat more diversified business model, with exposure to refining, midstream and chemicals.
High-Return Refinery Investments Add Earnings Potential
MPC is selectively investing in projects aimed at increasing yields, improving product flexibility and strengthening refinery competitiveness, providing potential upside beyond the current refining cycle.
During the second quarter, MPC completed its El Paso yield improvement and Robinson product flexibility projects. The El Paso upgrades to the FCC and alkylation units are expected to support higher volumes and strengthen its position across the El Paso, Phoenix and Mexico markets. Meanwhile, the Robinson project adds approximately 10,000 barrels per day of incremental jet fuel capacity. Management expects these projects to generate returns of 25% or higher.
MPC also has a significant project pipeline, including a 90,000-barrel-per-day distillate hydrotreater at Galveston Bay and feedstock optimization at Garyville that could raise crude throughput by 30,000 barrels per day.
Importantly, MPC expects 2026 standalone capital spending of $1.5 billion, with about 65% allocated to value-enhancing projects, underscoring disciplined capital allocation and potential long-term earnings growth.
MPC’s Cash Flow and MPLX Strengthen Shareholder Returns
MPC’s investment case benefits from a powerful combination of refining upside, strong cash generation and growing midstream cash flows through MPLX. In the second quarter, MPC generated $8.46 billion in adjusted EBITDA and about $6.6 billion in operating cash flow, excluding working-capital changes. The company returned more than $2.8 billion to its shareholders, including $2.5 billion in share repurchases.
MPC also maintains significant financial flexibility, with about $7.8 billion of consolidated cash and no borrowings under its $5 billion revolving credit facility. Excluding MPLX, liquidity stood at approximately $11.7 billion, while $6.1 billion remained under the share repurchase authorization.
Meanwhile, MPLX provides a more stable source of cash flow. Its 2026 growth capital was raised to $2.9 billion, with mid-single-digit adjusted EBITDA growth expected. Investments across the Permian and Marcellus are expected to support 12.5% annual distribution growth in 2026 and 2027. This diversified cash-flow base can support dividends, buybacks and long-term shareholder value.
MPC's Positive Earnings Momentum
Over the past 60 days, the Zacks Consensus Estimate for Marathon Petroleum’s 2026 earnings rose 41.6% to $46.66 per share, while the same for 2027 increased 36% to $35.01. The upward revisions indicate that analysts are becoming more confident in the company's earnings potential.
Image Source: Zacks Investment Research
Challenges for Marathon Petroleum Stock
MPC’s biggest risk is that today’s exceptional refining margins may not last. R&M EBITDA surged, but margins could weaken as outages decline and product supplies improve. Geopolitical disruptions and tight diesel markets may also ease. Additionally, expected $290 million in third-quarter turnaround costs could pressure margins, leaving the stock vulnerable. Furthermore, MPC’s valuation, trading at a forward price-to-sales ratio of 0.81, reflects a premium when compared with Valero Energy and Phillips 66.
Image Source: Zacks Investment Research
Conclusion: MPC Still a Buy
This Zacks Rank #2 (Buy) company remains an attractive investment with its sharp 138.6% year-to-date surge, ahead of its competitors — Valero Energy and Phillips 66. Strong operational execution, a high second-quarter R&M margin capture rate and decade-low unplanned downtime highlight the company’s improving efficiency. High-return refinery projects, disciplined capital allocation and robust cash generation provide additional upside, while MPLX adds stability through growing midstream cash flows.
However, cyclical refining margins, turnaround costs and a premium valuation pose risks. Overall, Marathon Petroleum stands out as a good investment opportunity for investors seeking strong fundamentals and shareholder returns, provided they can tolerate geopolitical and commodity-driven risks.
You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.