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Share-Based Payments | 12 Months Ended
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Aug. 27, 2022
Share-Based Payments |
Share-Based Payments | Note B – Share-Based Payments Overview of Share-Based Payment Plans The Company has several active and inactive equity incentive plans under which the Company has been authorized to grant share-based awards to key employees and non-employee directors. Awards under these plans have been in the form of restricted stock, restricted stock units, stock options, stock appreciation rights and other awards as defined by the plans. The Company also has an Employee Stock Purchase Plan that allows employees to purchase Company shares at a discount subject to certain limitations. The Company also has an Executive Stock Purchase Plan which permits all eligible executives to purchase AutoZone’s common stock using up to twenty-five percent of his or her annual salary and bonus. Amended and Restated AutoZone, Inc. 2011 Equity Incentive Award Plan On December 15, 2010, the Company’s stockholders approved the 2011 Equity Incentive Award Plan (the “2011 Plan”), allowing the Company to provide equity-based compensation to non-employee directors and employees for their service to AutoZone or its subsidiaries or affiliates. Prior to the Company’s adoption of the 2011 Plan, equity-based compensation was provided to employees under the 2006 Stock Option Plan and to non-employee directors under the 2003 Director Compensation Plan (the “2003 Comp Plan”). During fiscal 2016, the Company’s stockholders approved the Amended and Restated AutoZone, Inc. 2011 Equity Incentive Award Plan (the “Amended 2011 Equity Plan”). The Amended 2011 Equity Plan imposes a maximum limit on the compensation, measured as the sum of any cash compensation and the aggregate grant date fair value of awards granted under the Amended 2011 Equity Plan, which may be paid to non-employee directors for such service during any calendar year. The Amended 2011 Equity Plan also applies a ten-year term on the Amended 2011 Equity Plan through December 16, 2025 and extends the Company’s ability to grant incentive stock options under the Amended 2011 Equity Plan through October 7, 2025. AutoZone, Inc. 2020 Omnibus Incentive Award Plan On December 16, 2020, the Company’s stockholders approved the AutoZone, Inc. 2020 Omnibus Incentive Award Plan (the “2020 Omnibus Plan”), which serves as the successor to the Amended 2011 Equity Plan. The 2020 Omnibus Plan provides equity-based compensation to our non-employee directors and employees for their service to AutoZone or our subsidiaries or affiliates. Under the 2020 Omnibus Plan, participants may receive equity-based compensation in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, dividend equivalents, deferred stock, stock payments, performance based awards, cash based awards and other incentive awards structured by the Compensation Committee and the Board within parameters set forth in the 2020 Omnibus Plan. ​ AutoZone, Inc. Director Compensation Program Under the Company’s Director Compensation Program (the “Program”), non-employee directors will receive their compensation in awards of restricted stock units under the 2020 Omnibus Plan, with an option for a certain portion of a director’s compensation to be paid in cash at the non- employee director’s election. Under the Program, restricted stock units are granted on January 1 of each year (the “Grant Date”). The number of restricted stock units is determined by dividing the amount of the annual retainer by the fair market value of the shares of common stock as of the Grant Date. The restricted stock units are fully vested on the date of grant and are paid in shares of the Company’s common stock on the first or the fifth anniversary of the Grant Date (at the Director’s election) or if sooner, the date the non-employee director ceases to be a member of the Board (“Separation from Service”). The cash portion of the award, if elected, is paid ratably over each calendar quarter. Total share-based compensation expense (a component of Operating, selling, general and administrative expenses) was $70.6 million for fiscal 2022, $56.1 million for fiscal 2021 and $44.8 million for fiscal 2020. General terms and methods of valuation for the Company’s share-based awards are as follows: Stock Options The Company grants options to purchase common stock to certain of its employees under its plan at prices equal to the market value of the stock on the date of grant. Options have a term of ten years from grant date. Employee options generally vest in equal annual installments on the first, second, third and fourth anniversaries of the grant date and generally have 90 days after the service relationship ends, or one year after death, to exercise all vested options, unless retirement provisions are met. The fair value of each option grant is separately estimated for each vesting date. The fair value of each option is amortized into compensation expense on a straight-line basis between the grant date for the award and each vesting date. The Company has estimated the fair value of all stock option awards as of the date of the grant by applying the Black-Scholes-Merton multiple-option pricing valuation model. The following table presents the weighted average for key assumptions used in determining the fair value of options granted and the related share-based compensation expense:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended |
​ |  | August 27, | ​ | August 28, | ​ | August 29, |
​ |  | 2022 | ​ | 2021 | ​ | 2020 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Expected price volatility |  | 28 | % | 28 | % | 22 | %
Risk-free interest rate |  | 1.1 | % | 0.4 | % | 1.4 | %
Weighted average expected lives (in years) |  | 5.6 | ​ | 5.6 | ​ | 5.5 | ​
Forfeiture rate |  | 10 | % | 10 | % | 10 | %
Dividend yield |  | 0 | % | 0 | % | 0 | %
​ The following methodologies were applied in developing the assumptions used in determining the fair value of options granted: Expected price volatility – This is a measure of the amount by which a price has fluctuated or is expected to fluctuate. The Company uses actual historical changes in the market value of its stock to calculate the volatility assumption as it is management’s belief that this is the best indicator of future volatility. The Company calculates daily market value changes from the date of grant over a past period representative of the expected life of the options to determine volatility. An increase in the expected volatility will increase compensation expense. Risk-free interest rate – This is the U.S. Treasury rate for the week of the grant having a term equal to the expected life of the option. An increase in the risk-free interest rate will increase compensation expense. Expected lives – This is the period of time over which the options granted are expected to remain outstanding and is based on historical experience. Separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. Options granted have a maximum term of ten years. An increase in the expected life will increase compensation expense. Forfeiture rate – This is the estimated percentage of options granted that are expected to be forfeited or canceled before becoming fully vested. This estimate is based on historical experience at the time of valuation and reduces expense ratably over the vesting period. An increase in the forfeiture rate will decrease compensation expense. This estimate is evaluated periodically based on the extent to which actual forfeitures differ, or are expected to differ, from the previous estimate. Dividend yield – The Company has not made any dividend payments nor does it have plans to pay dividends in the foreseeable future. An increase in the dividend yield will decrease compensation expense. The weighted average grant date fair value per share of options granted was $463.45 during fiscal 2022, $304.31 during fiscal 2021 and $252.54 during fiscal 2020. The intrinsic value of options exercised was $282.7 million in fiscal 2022, $280.1 million in fiscal 2021 and $101.9 million in fiscal 2020. The total fair value of options vested was $39.3 million in fiscal 2022, $44.7 million in fiscal 2021 and $39.1 million in fiscal 2020. The Company generally issues new shares when options are exercised. The following table summarizes information about stock option activity for the year ended August 27, 2022:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted |  | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | Aggregate
​ | ​ | ​ | ​ | Weighted | ​ | Contractual | ​ | Intrinsic
​ | ​ | Number | ​ | Average | ​ | Term | ​ | Value
​ | ​ | of Shares | ​ | Exercise Price | ​ | (in years) | ​ | (in thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Outstanding – August 28, 2021 |  | 1,208,054 | ​ | $ | 790.41 |  | ​ | ​ | ​ | ​
Granted |  | 164,532 | ​ | ​ | 1,652.86 |  |  |  | ​ |
Exercised |  | (203,310) | ​ | ​ | 582.42 |  |  |  | ​ |
Forfeited/Cancelled |  | (30,176) | ​ | ​ | 1,198.93 |  |  |  | ​ |
Outstanding – August 27, 2022 |  | 1,139,100 | ​ |  | 941.28 |  | 5.88 | ​ | $ | 1,391,686
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Exercisable |  | 739,757 | ​ | ​ | 746.60 | ​ | 4.64 | ​ | ​ | 1,047,804
Expected to vest |  | 380,857 | ​ | ​ | 1,296.02 | ​ | 8.15 | ​ | ​ | 330,203
Available for future grants |  | 1,023,688 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ As of August 27, 2022, total unrecognized share-based compensation expense related to stock options, net of estimated forfeitures, was approximately $59.0 million, before income taxes, and will be recognized over an estimated weighted average period of 2.8 years. Restricted Stock Units Restricted stock unit awards are valued at the market price of a share of the Company’s stock on the date of grant and vest ratably on an annual basis over a four-year service period and are payable in shares of common stock on the vesting date. Compensation expense for grants of employee restricted stock units is recognized on a straight-line basis over the four-year service period, less estimated forfeitures, which are consistent with stock option forfeiture assumptions. As of August 27, 2022, total unrecognized stock-based compensation expense related to nonvested restricted stock unit awards, net of estimated forfeitures, was approximately $10.1 million, before income taxes, which we expect to recognize over an estimated weighted average period of 2.5 years. Transactions related to restricted stock units for the fiscal year ended August 27, 2022 are as follows:
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-
​ |  | Number |  | Average Grant
​ | ​ | of Shares | ​ | Date Fair Value
​ | ​ | ​ | ​ | ​ | ​
Nonvested at August 28, 2021 |  | 15,751 | ​ | $ | 1,005.41
Granted |  | 5,551 | ​ | ​ | 1,740.19
Vested |  | (6,572) | ​ | ​ | 1,159.53
Forfeited |  | (1,999) | ​ | ​ | 1,149.97
Nonvested at August 27, 2022 |  | 12,731 | ​ | $ | 1,223.61
​ Stock Appreciation Rights At August 27, 2022 and August 28, 2021, the Company had $10.4 million and $7.5 million, respectively of accrued compensation expense. There were 4,822 outstanding units issued under the 2003 Comp Plan and prior plans. As directors retire, this balance will be reduced. No additional shares of stock or units will be issued in future years under the 2003 Comp Plan or prior plans. Employee Stock Purchase Plan and Executive Stock Purchase Plan The Company recognized $3.2 million in compensation expense related to the discount on the selling of shares to employees and executives under the various share purchase plans in fiscal 2022, $2.5 million in fiscal 2021 and $3.1 million in fiscal 2020. Under the Employee Plan, 6,238, 8,479 and 10,525 shares were sold to employees in fiscal 2022, 2021 and 2020, respectively. The Company repurchased 4,886, 7,611 and 8,287 shares in fiscal 2022, 2021 and 2020, respectively, all at market value from employees electing to sell their stock. Purchases under the Executive Plan were 709, 997 and 1,204 shares in fiscal 2022, 2021 and 2020, respectively. Issuances of shares under the Employee Plan are netted against repurchases and such repurchases are not included in share repurchases disclosed in “Note K – Stock Repurchase Program.” At August 27, 2022, 127,524 shares of common stock were reserved for future issuance under the Employee Plan, and 233,655 shares of common stock were reserved for future issuance under the Executive Plan.

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