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Exhibit 21

SUBSIDIARIES OF THE REGISTRANT

The Company is the owner of all of the issued and outstanding stock of the following corporations, except as noted below.

Name of Subsidiary						State or Country of Incorporation
Prism Assurance, Ltd.						Vermont
Harmon, Inc.						Minnesota
Harmon Contract, Inc.						Minnesota
Viracon Holding Company						Minnesota
Viracon Georgia, LLC(1)						Minnesota
Viracon Singapore Pte. Ltd(2)						Singapore
Glassec Vidros de Seguranca Ltda.(3)						Brazil
Tru Vue, Inc.						Illinois
Tru Vue Netherlands, B.V.(4)						Netherlands
Apogee Services, Inc.(1)						Minnesota
Apogee Wausau Group, Inc.						Wisconsin
Apogee SFS US, LLC(5)						Delaware
Alumicor Limited						Canada
Harmon Facades, ULC(7)						Canada
EFCO, LLC(5)						Missouri
Velocity, An Apogee Company, LLC(6)						Minnesota
Viracon, LLC(6)						Minnesota
Architectural Services Holding Company, LLC						Minnesota

(1) Owned by Harmon, Inc.

(2) Owned by Viracon, LLC

(3) Owned 99.9+% by Viracon, LLC and <0.1% by Harmon Contract, Inc.

(4) Owned by Tru Vue, Inc.

(5) Owned by Apogee Wausau Group, Inc.

(6) Owned by Viracon Holding Company

(7) Owned by Architectural Services Holding Company, LLC