#26 JE Dunn Construction Group Inc., Kansas City, Mo., with Iowa region office in West Des Moines, $1.9 billion in revenues; ranked 25 in 2011 (based on 2010 revenues).

#57 The Weitz Co., Des Moines, with revenues of $889 million, including international work. Ranked No. 53 in 2011.

#76 Ryan Companies US Inc., headquarters in Minneapolis with office in West Des Moines, $662 million in revenues, including international work. Ranked No. 72 in 2011.

#193 Klinger Cos. Inc., Sioux City, revenues of $276 million. Ranked No. 273 in 2011.

#363 Conlon Construction Co., Dubuque, revenues of $132.2 million. Unranked in 2011.

Source: Engineering News-Record Top 400 Contractors for 2012