Calumet Specialty Products Partners LP (CLMT) experienced a significant intraday plummet of 9.78% on Friday, following the release of its fourth-quarter financial results.

The company reported quarterly sales of $1.039 billion, which fell short of the analyst consensus estimate of $1.058 billion. The sales miss was attributed to low industry renewable diesel margins, particularly impacting the Montana Renewables segment. While the quarterly loss per share of $0.43 was in line with some expectations, the revenue shortfall and margin pressures in renewable fuels drove negative investor sentiment.

For the full fiscal year 2025, Calumet posted a net loss of $33.8 million. The market's reaction reflects concerns over the company's performance in its renewable fuels business and the broader challenges in the renewable diesel sector highlighted in the earnings report.