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Top Company Lists

The NGA’s four leading market research programs, published by Glass Magazine and Window + Door, provide critical industry performance data and information about the North American glass, glazing and fenestration markets.

The annual Top List programs survey companies in the glazing, glass fabrication, metal supply and fenestration manufacturing segments to offer:

  • Leading companies ranked by annual sales

  • Market performance data

  • Industry trends and challenges to track

  • And more…

Annual Top List Programs

Cover of the June 2019 issue of Glass Magazine

Top 50 Glaziers

Launched in 1992, this annual ranking presents the 50 largest contract glazing companies serving the United States, based on reported sales volume.


Top Glass Fabricators

These annual rankings are based on sales volume and include stand-alone architectural glass fabrication plants in the United States and Canada. 



Top Metal Companies

The annual report features the leading suppliers of metal products in the United States and Canada. It includes companies that manufacture, fabricate and sell curtain wall, storefront and entrances, commercial interior and exterior railings, aluminum composite panels and exterior sun-control products to the glass and glazing industry. 



Top Manufacturers

This annual ranking details North America's largest manufacturers of residential windows, doors, skylights and related products, based on sales volume.