Ducommun's stock plunged 5.40% during intraday trading on Thursday after the aerospace and defense company reported fourth-quarter results that fell short of revenue expectations.

The company's Q4 2025 revenue came in at $215.8 million, missing the analyst consensus estimate of $221 million. While Ducommun reported strong adjusted earnings per share of $1.05, beating the $0.96 estimate, and achieved record gross margins of 27.7%, the revenue shortfall appears to have driven investor selling pressure.

Despite the quarterly revenue miss, Ducommun highlighted positive business fundamentals including record remaining performance obligations of $1.1 billion and a book-to-bill ratio of 1.3x, driven by missile platform orders. The company also stated that tariffs are not expected to materially impact its financial outlook.