ENR Midwest has extended its Top Design Firms deadline to March 19, providing firms in Illinois, Indiana, Wisconsin and Missouri an additional week to submit forms for the annual listing, which ranks the region's largest architecture and engineering firms in accordance with their revenues for 2011.

The ranking will be published in the May 21 edition of ENR Midwest.

To submit a form, click on the Regionals Top Design Firms 2012 box on the right side of our home page – www.enr.com/midwest. – or simply click here

And for a glance at the Top Design firms of 2010, click here