Piper Sandler analyst John Royall opened coverage of large-cap independent refiners with a modestly positive view, singling out Marathon Petroleum and Valero Energy as preferred holdings despite valuation concerns after a strong sector rally in 2026.
Royall described the current environment for refiners as exceptional, driven by a combination of global supply tightness, roughly 3 million barrels per day of refinery downtime and the ongoing closure of the Strait of Hormuz. Those factors have underpinned a sector-wide surge, with the group up more than 80% on average year-to-date.
Even after that advance, Royall sees limited near-term catalysts for a significant pullback, concluding that fundamentals should remain supportive well into the following year. On valuation, he notes that large-cap refiners trade at about 6 times projected 2027 EBITDA, which is near historical norms, but appear richer on a mid-cycle basis at close to 8.5 times 2028 EBITDA. From those levels, the analyst models average total return upside to year-end 2027 price targets of roughly 6%.
Marathon Petroleum (MPC) - Overweight
Royall initiated coverage of Marathon Petroleum with an Overweight rating, highlighting the company’s attractive valuation and what he views as group-high upside to his price target. He pointed to the cash flow support provided by Marathon’s midstream affiliate, MPLX, noting that the affiliate’s growing annual distribution currently covers the parent’s dividend and capital needs. That coverage, Royall says, allows the majority of Marathon’s free cash flow to be returned to shareholders, with total return of capital yield expected to exceed 11% in 2027.
The analyst also emphasized ongoing gains in refining capture rates driven by commercial initiatives, and he expects that both new and in-flight refining projects at Garyville and Robinson will continue to lift profitability on a per-barrel basis.
In recent third-party coverage developments cited by Royall, UBS raised Marathon’s price target citing expectations for strong second-quarter 2026 earnings, and BMO Capital reiterated an Outperform rating after a tour of the Garyville refinery.
Valero Energy (VLO) - Overweight
Royall likewise started coverage of Valero Energy with an Overweight rating, underscoring the company’s operational consistency and its group-high adjusted EBITDA per barrel on a five-year basis. He noted Valero’s relatively large exposure to the U.S. Gulf Coast - the highest among peers - which should position the company to benefit from product supply tightness tied to global refinery outages because of its export capability.
Valero’s system is described as highly complex and capable of processing diverse crude slates, including Venezuelan grades, which supports its ability to capture margin across a range of feedstocks. Royall highlighted that Valero has maintained payout levels above 60% in each of the past three years, and he expects its estimated 2026-27 total return of capital yield to be above the group average. The company’s balance sheet also stands out, with net debt to capital of about 18%, a level Royall characterizes as best-in-class and a source of financial flexibility.
Separately noted, Valero announced a regular quarterly cash dividend of $1.20 per share payable in August 2026. The stock also remains the subject of ongoing analyst coverage, with UBS reiterated as Buy and Mizuho reiterated as Neutral.
Valuation context and outlook
Royall’s initiation frames a sector in the midst of an unusually tight supply environment that has produced strong near-term performance. While his ratings on Marathon and Valero are Overweight, the analyst is cautious about mid-cycle earnings valuations, which he views as relatively rich at approximately 8.5 times 2028 EBITDA. That assessment tempers the upside he models to his year-end 2027 price targets, which average near 6% for the group.
Conclusion
Piper Sandler’s coverage launch paints a picture of refiners benefiting from a confluence of supply constraints and asset downtime that supports refining economics. Marathon and Valero emerge as Royall’s preferred large-cap names based on valuation, cash return mechanics and operational positioning, even as mid-cycle valuation measures suggest limited further upside beyond his modeled targets by the end of 2027.