The Top Metal Companies annual report, now in its eighth year, showcases the leading architectural glass and metal companies. Surveyed companies include those that manufacture, fabricate and sell curtain wall, storefront and entrance systems, commercial interior and exterior railings, aluminum composite panels and exterior sun-control products to the glass and glazing industry. This year's report includes a ranking of companies based on annual sales, a closer look at market growth and product trends, standout projects and more.