J.D. Irving, Limited (JDI) is a privately owned conglomerate company headquartered in Saint John, New Brunswick, Canada. It is a part of the Irving Group of Companies and consists of various subsidiaries, including Irving Tissue, Irving Equipment, Kent Building Supplies, New Brunswick Railway, New Brunswick Southern Railway, Eastern Maine Railway, Maine Northern Railway, Acadia Broadcasting, Irving Shipbuilding, and Cavendish Farms, among others. JDI operates across a range of industries, including forestry, forestry products, agriculture, food processing, transportation, and shipbuilding. Together with Irving Oil and Ocean Capital Investments, JDI constitutes the core of the Irving Group of Companies, which consolidates the business interests of the Irving family.