Ameresco Inc. (AMRC) shares plummeted 7.88% in after-hours trading on Monday, following the release of the company's first-quarter 2026 financial results.

The energy efficiency and renewable energy company reported a net loss attributable to common shareholders of $18.3 million for Q1 2026, significantly wider than the prior year. The loss per share was $0.35, compared to a loss of $0.10 per share a year earlier. While revenue of $401.5 million beat analyst estimates, the company's adjusted earnings per share of -$0.33 missed the consensus estimate of -$0.30.

Furthermore, Ameresco lowered its full-year 2026 adjusted EPS guidance to a range of $1.06 to $1.28, down from its previous outlook of $1.10 to $1.35. The combination of a widening quarterly loss, an earnings miss, and reduced annual profit forecast likely contributed to the sharp negative after-hours reaction from investors.