The company scales down operations in Russia that are not related to the production and transport of essential food commodities and ingredients. Crop Trader ADM Weighs Options to Exit Main Russian Business. Aston, one of the largest Russian grain traders, has two offices in Lausanne, including Aston Agro-Industrial which is responsible for international trade. Moreover, Aston operates a joint venture for corn processing with ADM, the world's second largest agricultural trader based in Canton Vaud.