Stockholders' Equity

9 Months Ended

Sep. 30, 2015

Stockholders' Equity

Stockholders' Equity

N.STOCKHOLDERS’ EQUITY

August 2015 Public Offering of Common Stock

In August 2015, we sold approximately 3.6 million shares of our common stock at a public offering price of $63.75 per share, resulting in net proceeds to us of approximately $218.6 million.

March 2015 Public Offering of Common Stock

In March 2015, we sold approximately 4.6 million shares of our common stock at a public offering price of $44.00 per share, resulting in net proceeds to us of approximately $188.8 million.

2015 Annual Meeting

At our Annual Meeting, our stockholders approved proposals to (i) amend our Certificate of Incorporation, as amended and restated and then currently in effect, to increase the number of authorized shares of our common stock from 58,750,000 shares to 117,500,000 shares (which amendment was subsequently filed with the Secretary of State of the State of Delaware) and (ii) amend our 2007 Plan to, among other things, increase the number of shares of our common stock available for issuance thereunder by 1,700,000shares.

Change in Stockholders’ Equity

Total stockholders’ equity increased by $460.0 million during the nine months ended September 30, 2015. This increase was primarily driven by $188.8 million and $218.6 million in net proceeds related to the March 2015 and August 2015 public offerings of common stock, respectively, as discussed above, $25.6 million from our net income, $15.5 million from the exercise of stock options and $11.6 million related to equity-based compensation expense.