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, Inc.		Minnesota
Viracon Georgia, Inc.(1)		Minnesota
Viracon Singapore Pte. Ltd(1)		Singapore
Glassec Vidros de Seguranca Ltda.(2)		Brazil
Tru Vue, Inc.		Illinois
Tru Vue Netherlands, B.V.(3)		Netherlands
Apogee Services, Inc.(4)		Minnesota
Apogee Wausau Group, Inc.		Wisconsin
Tubelite Inc.		Michigan
Alumicor Limited		Canada
Sotawall Limited		Canada
EFCO Corporation		Missouri
Velocity, A Viracon Company		Minnesota

⁽¹⁾ Owned by Viracon, Inc.

⁽²⁾ Owned 99.9+% by Viracon, Inc. and <0.1% by Harmon Contract, Inc.

⁽³⁾ Owned by Tru Vue, Inc.

⁽⁴⁾ Owned by Harmon, Inc.