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 (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) or (e), check the following box. ☒

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) or (e), check the following box. ☐

If this form relates to the registration of a class of securities concurrently with a Regulation A offering, check the following box. ☐

Securities Act registration statement or Regulation A offering statement file number to which this form relates:

Not Applicable

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

None

The securities to be registered hereby are Class A common stock, par value $0.01 per share (the “ Class  A Common Stock ”) of Chaparral Energy, Inc. (the “ Registrant ”). A description of the Class A Common Stock is set forth in the section entitled “Description of Capital Stock – Class A and Class B Common Stock” in the prospectus constituting a part of the Post-Effective Amendment on Form S-3 to Registration Statement on Form S-1 (File No. 333-218579) filed by the Registrant with the Securities and Exchange Commission on April 20, 2018 and declared effective on May 3, 2018, as amended (the “ Registration Statement ”), which description is incorporated herein by reference. Any form of prospectus or prospectus supplement to the Registration Statement that includes such descriptions and that is subsequently filed is also incorporated by reference herein.

In accordance with the “Instructions as to Exhibits” with respect to Form 8-A, no exhibits are required to be filed as part of this registration statement because no other securities of the Registrant are registered on The New York Stock Exchange and the securities to be registered hereby are not being registered pursuant to Section 12(g) of the Securities Exchange Act of 1934, as amended.

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, thereto duly authorized.