UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR 12(g) OF THE

SECURITIES EXCHANGE ACT OF 1934

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

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), check the following box.  x

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), check the following box.  ¨

Securities Act registration statement file number to which this form relates:  333-209002  

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

Item 1.  Description of Registrant’s Securities to be Registered.

The information required by this Item 1 is incorporated herein by reference to the information set forth under the caption “Description of Our Securities” in the prospectus forming a part of the Registrant’s Registration Statement on Form S-1 (File No. 333-209002), originally filed with the U.S. Securities and Exchange Commission (the “ Commission ”) on January 15, 2016, as amended from time to time (the “ Registration Statement ”). In addition, any description of such securities contained in a form of prospectus relating to the Registration Statement subsequently filed by the Registrant with the Commission pursuant to Rule 424(b) under the Securities Act of 1933, as amended, shall be deemed to be incorporated by reference herein. 

Item 2.  Exhibits.

Because no other securities of the Registrant are registered on The NASDAQ Stock Market LLC, and the securities being registered by this Registration Statement on Form 8-A are not being registered pursuant to Section 12(g) of the Securities Exchange Act of 1934, as amended, no exhibits are required to be filed with this Registration Statement on Form 8-A.

SIGNATURE

Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized.