2012 Top 50 Glaziers: The list

$150 million to $200 million

1. Benson Industries LLC*

Previous rank: 2
Headquarters: Portland, Ore.
U.S. locations: 5
Employees: 1,000
Website: www.bensonglobal.com

2. Permasteelisa North America Corp.*

Previous rank: 1
Headquarters: Windsor, Conn.
U.S. locations: 7
Employees: 1,000
Website: www.permasteelisa.com

3. Enclos Corp.

Previous rank: 4
Sales: Down 2.4 percent from 2010 to 2011
Headquarters: Eagan, Minn.
U.S. locations: 18
Opened/closed locations in 2011: Opened: Advanced Technology Studio, New York City, 12 employees; Closed: Engineering Office, Johnson City, Tenn., 12 employees.
Employees: 415
Website: www.enclos.com

4. Harmon Inc.

Previous rank: 5
Sales: Down 2 percent from 2010 to 2011
Headquarters: Bloomington, Minn.
U.S. locations: 13
Employees: 570
Website: www.harmoninc.com

$100 million to $150 million

5. Walters & Wolf

Previous rank: 6
Sales: Down 20.5 percent from 2010 to 2011
Headquarters: Fremont, Calif.
U.S. locations: 5
Employees: 495
Website: www.waltersandwolf.com

$50 million to $100 million

6. W&W Glass LLC

Previous rank: 7
Sales: Down 10 percent from 2010 to 2011
Headquarters: Nanuet, N.Y.
U.S. locations: 2
Employees: 195
Website: www.wwglass.com

7. Architectural Glass & Aluminum Co.

Previous rank: 12
Sales: Up 24 percent from 2010 to 2011
Headquarters: Alameda, Calif.
U.S. locations: 4
Employees: 60
Website: www.aga-ca.com

8. Continental Glass Systems

Previous rank: 9
Sales: No change from 2010 to 2011
Headquarters: Hilaleah, Fla.
U.S. locations: 2
Employees: 70
Website: www.cgsfl.com

9. Massey’s Plate Glass & Aluminum Inc.

Previous rank: 11
Sales: Up 4.5 percent from 2010 to 2011
Headquarters: Branford, Conn.
U.S. locations: 3
Employees: 150
Website: www.masseysglass.com

$40 million to $50 million

10. TSI/Exterior Wall Systems Inc.

Previous rank: 13
Sales: No change from 2010 to 2011
Headquarters: Upper Marlboro, Md.
U.S. locations: 1
Employees: 105
Website: www.tsicorporations.com