Tweten started the Buxton, N.D.-based potato business in 1979 with Maurice Gjelsness, his brother-in-law. Earlier, he’d farmed potatoes and grains with his brothers Obed and Kenneth.
Tweten served in the North Dakota state Legislature from 1973-88 on the Senate and House appropriations committees. He was a Farm Bureau state director and a member of the Red River Valley Potato Growers Association.
He moved to Fargo in 1994 after 40 years in the Buxton area.
Survivors include his wife, June Tweten; five sons, Steve Tweten, Erik Tweten, Dan Tweten, Jon Tweten and Bill Tweten; and two daughters, Liz Sanborn and Margaret Asheim.
Steve Tweten is president and chief executive officer of NoKota Packers. The company expanded into the Minnesota potato deal in 2011.
Malcolm Tweten was a longtime backer of Lutheran Social Services of North Dakota.