Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.20.2
Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 25, 2020
Share-based Payment Arrangement [Abstract]  
Stock Option Activity Stock option activity during the twenty-six weeks ended June 25, 2020 was as follows:
​ Options Weighted Average Exercise Price
Outstanding at December 27, 2019 6,037,079    $ 13.64   
Granted 278,499    57.22   
Exercised (1,291,255)   6.71   
Forfeited or expired (91,618)   23.00   
Outstanding at June 25, 2020 4,932,705    $ 17.74   
Vested and exercisable at June 25, 2020 2,746,188    $ 10.39   
Estimated Fair Value of Stock Option Grants
The Company estimated the fair value of stock option grants using the Black-Scholes-Merton option pricing model with the following weighted average assumptions during the period:
​ Twenty-six Weeks Ended
​ June 25, 2020
Risk-free interest rate 1.22  %
Expected volatility 38.7  %
Expected life (in years) 5.75
Dividend yield —  %
Restricted Stock Unit Activity
The following table summarizes restricted stock unit activity during the twenty-six weeks ended June 25, 2020:
Restricted Stock Units
Unvested at December 27, 2019 —   
Granted 114,440   
Vested —   
Forfeited (2,060)  
Unvested at June 25, 2020 112,380   
Restricted Stock Award Activity
The following table summarizes restricted stock award activity during the twenty-six weeks ended June 25, 2020:
Restricted Stock Awards
Service-based Performance-based TSR
Unvested at December 27, 2019 37,032    —    —   
Granted 102,931    160,315    104,456   
Vested (3,870)   —    —   
Forfeited —    —    —   
Unvested at June 25, 2020 136,093    160,315    104,456