Major manufacturers in Grand Forks include wind turbine manufacturer LM Glasfiber and light aircraft manufacturer Cirrus Design. Major food producers include potato processor J. R. Simplot Company and the state-owned North Dakota Mill and Elevator which is the largest flour mill in the United States. Amazon.com and SEI Information Technologies both operate call centers in Grand Forks. Other large private employers in the city include the locally owned Alerus Financial branch of banks, Home of Economy, and the locally owned Hugo's chain of supermarkets.