| Stockholders' Equity |
Stockholders' Equity Common Stock
We were authorized to issue 600,000,000 shares of common stock as of June 30, 2017. Holders of our common stock are not entitled to receive dividends unless declared by our board of directors. As of June 30, 2017, we had 170,712,093 shares of common stock outstanding and had reserved shares of common stock for future issuance as follows: | | | | | June 30, 2017 | Stock plans: | | Options outstanding | 4,992,394 |
| RSUs | 13,270,087 |
| Shares of common stock available for future grants: | | 2012 Equity Incentive Plan(1) | 25,602,145 |
| 2012 Employee Stock Purchase Plan(1) | 9,868,010 |
| Total reserved shares of common stock for future issuance | 53,732,636 |
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| | (1) | Refer to Note 12 for a description of these plans. |
During the six months ended June 30, 2017 and 2016, we issued a total of 3,822,126 shares and 3,710,925 shares, respectively, from stock option exercises, vesting of restricted stock units (RSUs), net of employee payroll taxes and purchases from the employee stock purchase plan (ESPP). In May 2017, we repurchased and retired 540,806 shares of our common stock for approximately $55.0 million, or $101.70 per share. We had no similar repurchases or retirements of common stock during the six months ended June 30, 2016.
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