UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

  FORM 10-K

(Mark One)

OR

                   

(Address of principal executive offices) (Zip code)

Registrant’s telephone number, including area code:

(425) 201-6100

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

(Title of Class)

Indicate by check mark whether the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes   o     No   ý

Indicate by check mark whether the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  Yes   o     No   ý

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes   ý  No     o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes   ý  No   o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.   o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes   o     No   ý

The aggregate market value of the Common Stock held by non-affiliates of the registrant outstanding as of June 30,  2015 , based upon the closing price of Common Stock on June 30,  2015 as reported on the NASDAQ Global Select Market, was $620.8 million . Common Stock held by each officer and director (or his or her affiliate) has been excluded because such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

As of February 16, 2016 , 41,207,155 shares of the registrant’s Common Stock were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Part III incorporates certain information by reference from the definitive proxy statement to be filed by the registrant in connection with the 2016  Annual Meeting of Stockholders (the “Proxy Statement ”).

TABLE OF CONTENTS

This report contains forward-looking statements that involve risks and uncertainties. The statements in this report that are not purely historical are forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. Words such as “anticipate, ” “believe, ” “plan, ” “expect, ” “future, ” “intend, ” “may, ” “will, ” “should, ” “estimate, ” “predict, ” “potential, ” “continue,” and similar expressions identify forward-looking statements, but the absence of these words does not mean that the statement is not forward-looking. These forward-looking statements include, but are not limited to, statements regarding projections of our future financial performance; trends in our businesses; our future business plans and growth strategy, including our plans to expand, develop, or acquire particular operations or businesses; and the sufficiency of our cash balances and cash generated from operating, investing, and financing activities for our future liquidity and capital resource needs.

Forward-looking statements are subject to known and unknown risks, uncertainties, and other factors that may cause our results, levels of activity, performance, achievements, and prospects to be materially different from those expressed or implied by such forward-looking statements. These risks, uncertainties, and other factors include, among others, those identified under Item 1A, "Risk Factors," and elsewhere in this report. You should not rely on forward-looking statements, which speak only as of the date of this Annual Report on Form 10-K. We do not undertake any obligation to update any forward-looking statement to reflect new information, events, or circumstances after the date of this Annual Report on Form 10-K or to reflect the occurrence of unanticipated events.