Vicor's stock experienced a significant after-hours plunge of 6.43% following the release of its fourth-quarter earnings results.

The sharp decline appears to be driven by the company's Q4 revenue falling short of analyst expectations. While Vicor reported strong earnings per share of $1.01, which significantly beat estimates, its quarterly revenue of approximately $92.7 million missed the consensus estimate of $107.8 million by a substantial margin.

This revenue shortcome overshadowed other positive aspects of the earnings report, including a significant year-over-year increase in product revenue and a substantial tax benefit that boosted net income. The market's negative reaction in the after-hours session reflects investor concern over the revenue miss despite the earnings beat.