Stock-Based Compensation

6 Months Ended

Jun. 30, 2025

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

7. Stock-Based Compensation

The Company uses the Black-Scholes option pricing model to calculate the fair value of stock option awards, whether they possess time-based vesting provisions or performance-based vesting provisions, and awards granted under the Vicor Corporation 2017 Employee Stock Purchase Plan (“ESPP”), as of their grant date. Stock-based compensation expense was as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2025		2024		2025		2024
Cost of product revenues	$	899	$	744	$	1,866	$	1,498
Selling, general and administrative		1,790		1,757		3,984		3,676
Research and development		1,020		930		2,208		2,037
Total stock-based compensation	$	3,709	$	3,431	$	8,058	$	7,211

Compensation expense by type of award was as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2025		2024		2025		2024
Stock options	$	3,386	$	3,167	$	7,463	$	6,633
ESPP		323		264		595		578
Total stock-based compensation	$	3,709	$	3,431	$	8,058	$	7,211