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

Unimin Corporation

(Exact name of registrant as specified in its charter)

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

333-224228

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

None

INFORMATION REQUIRED IN REGISTRATION STATEMENT

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

The description under the heading “Description of Combined Company Capital Stock” and “Comparison of Stockholder Rights Before and After the Merger” relating to Unimin Corporation’s (the “Registrant”) common stock par value $0.01 per share (the “Common Stock”) included in the registration statement on Form S-4 (Registration No. 333-224228), as amended from time to time (the “Registration Statement”), filed with the Securities and Exchange Commission, is incorporated herein by reference. Any form of proxy statement/prospectus subsequently filed pursuant to Rule 424(b) under the Securities Act of 1933, as amended, that constitutes part of the Registration Statement, shall be deemed to be incorporated herein by reference. The Registrant intends to change its name to “Covia Holdings Corporation” following the closing of the proposed merger described in the Registration Statement.

Item 2: Exhibits

Under the Instructions as to Exhibits with respect to Form 8-A, no exhibits are required to be filed because no other securities of the Registrant are quoted on the New York Stock Exchange and the securities 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, as amended, the Registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized.