ENR Midwest has extended its Top Design Firms deadline to Feb. 28, providing firms in Illinois, Indiana, Michigan, Missouri, Ohio and Wisconsin an additional four days to submit forms for the annual listing, which ranks the region's largest architecture and engineering firms in accordance with their revenues for 2013.

The listing will be published in the May 19 edition of ENR Midwest.

In addition to highlighting the performance of individual firms, the listing provides a collective snapshot of design activity in the Midwest. It also serves as the basis for selecting ENR Midwest's Design Firm of the Year.

Firms are selected on the basis of their financial performance, as well as their execution of key projects in the region. Previous honorees include Burns & McDonnell, HDR Inc. and KJWW Engineering Consultants.

To access a form, click here.

And for a glance at the Top Design firms of 2012, click here.