Stockholders' Equity

9 Months Ended

Sep. 30, 2020

STOCKHOLDERS’ EQUITY

Common Stock

The following table presents a rollforward of our common stock for the three and nine months ended September 30, 2020 and 2019:


	Three Months Ended September 30,			Nine Months Ended September 30,
	2020	2019		2020	2019
Shares issued and outstanding, beginning balance	67,292,864	69,991,145	69,065,491	70,596,559
Issuance of common stock from vested restricted stock units ¹	158,041	198,478	500,291	699,188
Issuance of common stock from exercise of stock options	25,075	23,441	65,684	163,214
Issuance of common stock for employee stock purchase plan	—	—	130,532	112,623
Repurchase of common stock	(521,137)	(307,046)	(2,688,538)	(1,482,655)
Awards effectively repurchased for required employee withholding taxes	(56,859)	(71,765)	(175,476)	(254,676)
Shares issued and outstanding, ending balance	66,897,984	69,834,253	66,897,984	69,834,253

⁽¹⁾ Net of shares of common stock underlying cancelled RSAs

Stock Repurchases

In February 2020, our board of directors authorized a $300 million incremental increase to our ongoing stock repurchase program. This repurchase authorization has no expiration. We retire shares in the period they are acquired and account for the payment as a reduction to stockholders' equity.

During the nine months ended September 30, 2020, we repurchased 2,688,538 shares of common stock for approximately $135 million. As of September 30, 2020, approximately $400 million remained available for further repurchases of our common stock under all authorizations from our board of directors under this program.