Engineering News-Record (ENR) recently released its “Top 600 Specialty Contractors” list, which includes the largest revenue-generating glazing and curtainwall firms in the country.

Revenue for the top ten firms in the glazing and curtainwall category totaled $1.46 billion, nearly the same as last year’s total of $1.45 billion.

Enclos topped the list for the third consecutive year, but fell in the overall rankings from No. 56 to No. 79 with a total 2018 revenue of $332.9 million. In 2017 the company was ranked No. 39 overall. Harmon was second on the list this year after being unranked last year. The company ranked No. 100 overall with a 2018 revenue of $284.2 million.

More than half of the glazing firms that made ENR’s Top 600 Specialty Contractors list dropped in the overall rankings compared to the 2018 edition, while two increased in overall rank and two were not ranked last year. This could be due to not having had a high enough revenue or because the company did not provide its information for review.

Here are the top ten glazing and curtainwall firms:

1 – Enclos Corp., Eagan, Minn.
$332.9 million – No. 79 overall (No. 56 in 2018)

2 – Harmon Inc., Bloomington, Minn.
$284.2 million – No. 100 overall (Not ranked in 2018)

3 – Flynn Group, Kansas City, Kan.
$164.9 million – *No. 26 overall (No. 96 in 2018)

4 – Crown Corr Inc., Gary, Ind.
$158.8 million – **No. 124 overall (No. 99 in 2018)

5 – W&W Glass LLC, Nanuet, N.Y.
$150 million – No. 184 overall (No. 162 in 2018)

6 – Ventana, Chicago
$114 million – No. 236 overall (Not ranked in 2018)

7 – Architectural Glass & Aluminum, Livermore, Calif.
$92 million – No. 279 (No. 221 in 2018)

8 – Pioneer Cladding & Glazing Systems LLC, Mason, Ohio
$66 million – No. 344 overall (No. 322 in 2018)

9 – Architectural Wall Systems LLC, Des Moines, Iowa
$52 million – No. 398 overall (No. 462 in 2018)

10 – Giroux Glass Inc., Los Angeles
$48 million – No. 430 overall (No. 387 in 2018)

*Also listed in the roofing and sheet metal categories; the stated revenue doesn’t represent the company’s total for its overall ranking, only for the glazing portion.

**Also listed in the sheet metal category; the stated revenue doesn’t represent the company’s total for its overall ranking, only for the glazing portion.

Benson Industries Inc. or Portland, Ore., was ranked No. 86 overall in 2018 with a revenue of $278 million. It was second in the top ten glazing and curtainwall firms list; however, the company was not included in this year’s rankings.

Karas & Karas Glass Co. Inc. of Boston, Alliance Glazing Technologies of Romeoville, Ill., and Integro Building Systems of Opa-Locka, Fla., also made the top ten last year but were not included in this year’s rankings.

USGlass magazine also publishes an annual list of the nation’s top contract glaziers. Check out our 2019 list, published in February, here, and be on the lookout for the upcoming edition in February 2020.