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Stock-Based Compensation
 9 Months Ended
Sep. 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

 

 

Nine Months Ended

 

 

 

September 30,

 

 

September 30,

 

 

 

2025

 

 

2024

 

 

2025

 

 

2024

 

Cost of product revenues

 

$

1,024

 

 

$

886

 

 

$

2,890

 

 

$

2,384

 

Selling, general and administrative

 

 

2,117

 

 

 

2,036

 

 

 

6,101

 

 

 

5,712

 

Research and development

 

 

1,221

 

 

 

1,112

 

 

 

3,429

 

 

 

3,149

 

Total stock-based compensation

 

$

4,362

 

 

$

4,034

 

 

$

12,420

 

 

$

11,245

 

 

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

 

 

 

Three Months Ended

 

 

Nine Months Ended

 

 

 

September 30,

 

 

September 30,

 

 

 

2025

 

 

2024

 

 

2025

 

 

2024

 

Stock options

 

$

4,035

 

 

$

3,783

 

 

$

11,498

 

 

$

10,416

 

ESPP

 

 

327

 

 

 

251

 

 

 

922

 

 

 

829

 

Total stock-based compensation

 

$

4,362

 

 

$

4,034

 

 

$

12,420

 

 

$

11,245