Stockholders' Equity

6 Months Ended

Jun. 30, 2020

Share Repurchase Program

Our board of directors has authorized a share repurchase program of our Class A common stock, which does not have an expiration date. As of December 31, 2019, $4.90 billion remained available and authorized for repurchases. In January 2020, an additional $10.0 billion of repurchases was authorized under this program. During the six months ended June 30, 2020, we repurchased and subsequently retired 13 million shares of our Class A common stock for an aggregate amount of $2.62 billion. As of June 30, 2020, $12.28 billion remained available and authorized for repurchases.

The timing and actual number of shares repurchased under the repurchase program depend on a variety of factors, including price, general business and market conditions, and other investment opportunities, and shares may be repurchased through open market purchases or privately negotiated transactions, including through the use of trading plans intended to qualify under Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.

Share-based Compensation Plans

We maintain two share-based employee compensation plans: the 2012 Equity Incentive Plan, which was amended in each of June 2016 and February 2018 (Amended 2012 Plan), and the 2005 Stock Plan (collectively, Stock Plans). Our Amended 2012 Plan serves as the successor to our 2005 Stock Plan and provides for the issuance of incentive and nonstatutory stock options, restricted stock awards, stock appreciation rights, RSUs, performance shares, and stock bonuses to qualified employees, directors and consultants. Outstanding awards under the 2005 Stock Plan continue to be subject to the terms and conditions of the 2005 Stock Plan. Shares that are withheld in connection with the net settlement of RSUs or forfeited under our Stock Plans are added to the reserves of the Amended 2012 Plan. We account for forfeitures as they occur.

Share-based compensation expense consists of our RSU expense. RSUs granted to employees are measured based on the grant-date fair value. In general, our RSUs vest over a service period of four years. Share-based compensation expense is generally recognized based on the straight-line basis over the requisite service period.

Effective January 1, 2020, there were 171 million shares of our Class A common stock reserved for future issuance under our Amended 2012 Plan. The number of shares reserved for issuance under our Amended 2012 Plan increases automatically on January 1 of each of the calendar years during the term of the Amended 2012 Plan, which will continue through April 2026, by

a number of shares of Class A common stock equal to the lesser of (i) 2.5% of the total issued and outstanding shares of our Class A common stock as of the immediately preceding December 31st or (ii) a number of shares determined by our board of directors.

The following table summarizes the activities for our unvested RSUs for the six months ended June 30, 2020:



	Unvested RSUs
	Number of Shares		Weighted-Average Grant Date Fair Value
	(in thousands)
Unvested at December 31, 2019	78,851		$	165.74
Granted	48,395		$	168.66
Vested	(18,256	)	$	158.09
Forfeited	(2,733	)	$	161.28
Unvested at June 30, 2020	106,257		$	168.49

The fair value as of the respective vesting dates of RSUs that vested during the three and six months ended June 30, 2020 was $2.04 billion and $3.84 billion, respectively, and $1.58 billion and $2.89 billion during the three and six months ended June 30, 2019, respectively.

As of June 30, 2020, there was $16.90 billion of unrecognized share-based compensation expense related to RSUs awards. This unrecognized compensation expense is expected to be recognized over a weighted-average period of approximately three years based on vesting under the award service conditions.