What Did Valero Stock Investors Miss Before The Run?

A $10,000 stake in Valero Energy (VLO) on October 10, 2025, was worth about $29,500 by October 13, 2026. Over that window, the refiner returned to large profits, helped by sturdy fuel demand and tighter supply. So what was Valero itself saying about its refineries before October 10, 2025?

Valero Was Closing A Refinery Months Before The Run

Months before the twelve months measured here began, Valero told investors it would close one of its refineries. The company informed California regulators on April 16, 2025, that it planned to idle, restructure or stop refining at its Benicia refinery by the end of April 2026. It also took a $1.1 billion pre-tax write-down on its California refineries. During its first-quarter call on April 24, 2025, the company said its current intent was to close the plant.

At the time, the closure looked like bad news. Valero lost $595 million in the first quarter of 2025, a figure that included the write-down. That loss occurred during a quarter marked by lower refining margins and heavy U.S. refining maintenance. Looking back, a refiner shutting its own plant may have been the first sign of refining capacity leaving the market.

Valero’s second-quarter results, filed on July 24, 2025, offered a second clue. The operating margin rose to 3.3% from 0.8% in the first quarter, though it was still just below the 3.5% of a year earlier.

The stock was already rising before the twelve months measured here began, gaining 45.1% in the six months before October 10, 2025. Yet the signs available to investors were faint: one refinery closing, and a margin no higher than a year before.

Valero’s Stock Ran As Its Profits Came Back

Valero returned 192% over those twelve months, far more than the roughly 18% for the S&P 500. Marathon Petroleum returned 166.7% over the same period. That suggests investors repriced the group, not Valero alone.

During this period, Valero kept much more of each dollar of sales as profit. Its operating margin over the last twelve months was 7.2%, up from 1.7% a year earlier. In the second quarter of 2026 alone, net income reached $3.7 billion, compared to $714 million a year earlier. Measured by Valero’s fiscal 2025 revenue, refining is nearly the whole business.

Is Valero’s Refining Recovery Still Building?

By the company’s account, the tight supply was still there in July 2026. During Valero’s July 30, 2026 call, the company noted that about 5 million barrels a day of refining capacity was offline. It also placed light-product inventories about 130 million barrels below their usual level for the time of year. Looking ahead, Valero said it expects margins through the cycle to be higher than past margins would suggest. The Benicia closure flagged in April 2025 also showed up in the second-quarter results, as Valero cited extra depreciation from ceasing refining there.

Valero’s twelve-month operating margin is still below its five-year high of 10.6%. The company also highlighted a risk: a rapid fall in crude prices, which it said tends to drain working capital and cash. When Valero reports third-quarter results on October 22, 2026, the figure to watch is refining operating income, which hit $4.5 billion in the second quarter of 2026. A result near that level would suggest the tight supply is still there, and a sharp drop would suggest it is easing.

Does This Mean You Should Act On VLO?

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