Diamond Companies, a holding company for International Truck and IC Bus dealerships in Arkansas, Kansas, Missouri and Tennessee, and Roberts Truck Center LLC, a holding company for truck and bus dealerships in Kansas, New Mexico, Oklahoma and Texas will merge effective Jan. 1, 2014.

The new company will have revenues approaching $1 billion. The combined enterprise will have a greater potential for improved financial strength and the ability to deliver long-term operating performance and improvements through increased scale.

The company will employ 1,300 people at 29 locations in 26 markets.

The new enterprise will be a privately held company and the key principals will remain in their leadership positions. The new company will be named and branded before the Jan. 1, 2014 effective date.