Tennant's stock experienced a significant pre-market plunge of 8.87% following the release of its fourth-quarter earnings results that fell short of analyst expectations.

The company reported adjusted earnings of $0.48 per share for the quarter ended December 31, which missed the analyst consensus estimate of $1.70 by 71.71%. This represents a 68.42% decrease from earnings of $1.52 per share in the same period last year. Revenue also disappointed, coming in at $291.6 million compared to the expected $319.93 million, marking an 8.86% miss and an 11.34% decline year-over-year.

The weak quarterly performance and guidance for 2026 that appears below analyst expectations have contributed to negative investor sentiment, leading to the sharp decline in share price during pre-market trading.