1、UNITED STATESSECURITIES AND EXCHANGE COMMISSIONWashington,D.C.20549Form 10-KANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934For the fiscal year ended December 31,2019Commission File Number 1-12804(Exact name of registrant as specified in its charter)Delaware86-0748
2、362(State or other jurisdiction ofincorporation or organization)(I.R.S.EmployerIdentification No.)4646 E.Van Buren Street,Suite 400Phoenix,Arizona 85008(Address of principal executive offices)(Zip Code)(480)894-6311(Registrants telephone number,including area code)Securities registered pursuant to S
3、ection 12(b)of the Act:Title of each classTrading Symbol(s)Name of each exchange on which registeredCommon Stock,$.01 par valueMININasdaq Global Select MarketPreferred Share Purchase Rights Securities registered pursuant to Section 12(g)of the Act:NoneIndicate by check mark if the registrant is a we
4、ll-known seasoned issuer,as defined in Rule 405 of the Securities Act.Yes?No?Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d)of the Act.Yes?No?Indicate by check mark whether the registrant(1)has filed all reports required to be filed by
5、 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?No?Indicate by check mark whether the registrant has
6、 submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T(232.405 of this chapter)during the preceding 12 months(or for such shorter period that the registrant was required to submit such files).Yes?No?Indicate by check mark whether the reg