Delek US Holdings stock gained nearly 5% on Friday following the release of fourth-quarter 2025 earnings results that showed a significant operational turnaround. The downstream oil company reported non-GAAP net income of $143 million, or $2.31 per share, marking a dramatic reversal from a $161 million loss in the same period last year.
The improvement was primarily driven by the company's refining segment, which generated $314 million in adjusted EBITDA compared to a $69 million loss in Q4 2024. The substantial year-over-year swing reflects the benefit of wider refining margins during the quarter, a key metric that reflects the spread between crude oil costs and finished petroleum product prices.
While the results demonstrate operational improvement, market participants noted that a single quarter's performance does not necessarily indicate sustained profitability trends. The company's ability to maintain or expand these margins in subsequent periods will be critical for investors assessing the durability of the earnings recovery.