NOTE 19 — EMPLOYEE STOCK AND SAVINGS PLANS

We grant stock-based compensation to employees and directors. As of June 30, 2019, an aggregate of 327 million shares were authorized for future grant under our stock plans. Awards that expire or are canceled without delivery of shares generally become available for issuance under the plans. We issue new shares of Microsoft common stock to satisfy vesting of awards granted under our stock plans. We also have an ESPP for all eligible employees.

Stock-based compensation expense and related income tax benefits were as follows:

Stock Plans

Stock awards entitle the holder to receive shares of Microsoft common stock as the award vests. Stock awards generally vest over a four or five-year service period.

Executive Incentive Plan

Under the Executive Incentive Plan, the Compensation Committee approves stock awards to executive officers and certain senior executives. RSUs generally vest ratably over a four-year service period. PSUs generally vest over a three-year performance period. The number of shares the PSU holder receives is based on the extent to which the corresponding performance goals have been achieved.

Activity for All Stock Plans

The fair value of stock awards was estimated on the date of grant using the following assumptions:

During fiscal year 2019, the following activity occurred under our stock plans:

As of June 30, 2019, there was approximately $8.6 billion of total unrecognized compensation costs related to stock awards. These costs are expected to be recognized over a weighted average period of 3 years. The weighted average grant-date fair value of stock awards granted was $107.02, $75.88, and $55.64 for fiscal years 2019, 2018, and 2017, respectively. The fair value of stock awards vested was $8.7 billion, $6.6 billion, and $4.8 billion, for fiscal years 2019, 2018, and 2017, respectively.

Employee Stock Purchase Plan

We have an ESPP for all eligible employees. Shares of our common stock may be purchased by employees at three-month intervals at 90% of the fair market value on the last trading day of each three-month period. Employees may purchase shares having a value not exceeding 15% of their gross compensation during an offering period. Employees purchased the following shares during the periods presented:

As of June 30, 2019, 105 million shares of our common stock were reserved for future issuance through the ESPP.

Savings Plan

We have savings plans in the U.S. that qualify under Section 401(k) of the Internal Revenue Code, and a number of savings plans in international locations. Eligible U.S. employees may contribute a portion of their salary into the savings plans, subject to certain limitations. We contribute fifty cents for each dollar a participant contributes into the plans, with a maximum employer contribution of 50% of the IRS contribution limit for the calendar year. Employer-funded retirement benefits for all plans were $877 million, $807 million, and $734 million in fiscal years 2019, 2018, and 2017, respectively, and were expensed as contributed.