Compass Minerals (CMP) stock plummeted over 6% in pre-market trading on Tuesday, following the company's mixed fiscal Q1 2025 earnings report. Despite beating revenue expectations, Compass Minerals reported an adjusted loss of $0.55 per share, widely missing analyst estimates of $0.13 earnings per share.

The larger-than-expected loss was primarily attributed to weaker demand for deicing salt due to mild winter weather conditions in North America for the second consecutive year. This resulted in lower sales volumes and higher production costs, negatively impacting the company's salt segment performance.

While revenue of $307.2 million exceeded expectations of $302 million, driven by strong growth in the plant nutrition segment, the overall earnings miss and reduced guidance for the salt business overshadowed the positive revenue surprise. Compass Minerals also lowered its full-year salt volume and revenue outlook, citing potential weather-related disruptions.