The Company granted 48 and 61 stock options during the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. Stock-based compensation expense for stock options was $2,164 and $3,101 for the 13 weeks ended July 30, 2022 and July 31, 2021, respectively. Stock-based compensation expense for stock options was $4,506 and $5,998 for the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. The weighted-average grant date fair value of these stock options was $149.14 and $109.72 for the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. At July 30, 2022, there was approximately $13,822 of unrecognized stock-based compensation expense related to unvested stock options.
There were 56 and 58 restricted stock units issued during the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. Stock-based compensation expense for restricted stock units was $4,987 and $5,149 for the 13 weeks ended July 30, 2022 and July 31, 2021, respectively. Stock-based compensation expense for restricted stock units was $9,439 and $9,984 for the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. At July 30, 2022, there was approximately $32,535 of unrecognized stock-based compensation expense related to restricted stock units.
There were 37 and 46 performance-based restricted stock units issued during the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. Stock-based compensation expense for performance-based restricted stock units was $5,368 and $1,869 for the 13 weeks ended July 30, 2022 and July 31, 2021, respectively. Stock-based compensation expense for performance-based restricted stock units was $8,930 and $3,115 for the 26 weeks ended July 30, 2022 and July 31, 2021, respectively. At July 30, 2022, there was approximately $29,861 of unrecognized stock-based compensation expense related to performance-based restricted stock units.
10.Income taxes
Income tax expense reflects the federal statutory tax rate and the weighted average state statutory tax rate for the states in which the Company operates stores. Income tax expense of $95,859 for the 13 weeks ended July 30, 2022 represents an effective tax rate of 24.5%, compared to $80,989 of tax expense representing an effective tax rate of 24.4% for the 13 weeks ended July 31, 2021.
Income tax expense of $201,771 for the 26 weeks ended July 30, 2022 represents an effective tax rate of 24.3%, compared to $155,666 of tax expense representing an effective tax rate of 24.4% for the 26 weeks ended July 31, 2021.
11.Net income per common share
The following is a reconciliation of net income and the number of shares of common stock used in the computation of net income per basic and diluted common share:
| | | | | | | | | | | | |
| | 13 Weeks Ended | | 26 Weeks Ended |
| | July 30, | | July 31, | | July 30, | | July 31, |
(In thousands, except per share data) | | 2022 | | 2021 | | 2022 | | 2021 |
Numerator: | | | | | | | | | | | | |
Net income | | $ | 295,677 | | $ | 250,893 | | $ | 627,072 | | $ | 481,182 |
| | | | | | | | | | | | |
Denominator: | | | | | | | | | | | | |
Weighted-average common shares – Basic | | | 51,607 | | | 54,675 | | | 51,928 | | | 55,235 |
Dilutive effect of stock options and non-vested stock | | | 293 | | | 339 | | | 309 | | | 357 |
Weighted-average common shares – Diluted | | | 51,900 | | | 55,014 | | | 52,237 | | | 55,592 |
| | | | | | | | | | | | |
Net income per common share: | | | | | | | | | | | | |
Basic | | $ | 5.73 | | $ | 4.59 | | $ | 12.08 | | $ | 8.71 |
Diluted | | $ | 5.70 | | $ | 4.56 | | $ | 12.00 | | $ | 8.66 |
The denominator for diluted net income per common share for the 13 weeks ended July 30, 2022 and July 31, 2021 excludes 67 and 152 employee stock options and restricted stock units, respectively, due to their anti-dilutive effects. The denominator for diluted net income per common share for the 26 weeks ended July 30, 2022 and July 31, 2021 excludes