Hartz Mountain Industries is a privately held real estate investment, development, and management company headquartered in Secaucus, New Jersey. Founded in 1966 as an extension of the Stern family's pet supply business, the firm began with the development of a 700,000-square-foot industrial facility in Bayonne, New Jersey. The company acquired over 750 acres of Meadowlands land in Secaucus in 1969, establishing the Harmon Cove industrial and retail hub that became central to its regional development strategy. Hartz Mountain focuses on industrial, multifamily, retail, and office properties across major East Coast markets, including New York, New Jersey, Pennsylvania, Maryland, Atlanta, Florida, and the Carolinas. The portfolio encompasses over 260 properties totaling more than 45 million square feet of space. The firm operates with in-house architectural, construction, design, engineering, legal, marketing, leasing, property management, and financial capabilities that enable efficient development and operation of complex projects. Major developments include Lincoln Harbor, a 60-acre waterfront mixed-use project in Weehawken featuring office, residential, retail, and hotel components, and The Plaza at Harmon Meadow in Secaucus. Recent activity includes the $139 million acquisition of the six-building Bryton Commerce Center in Huntersville, North Carolina in January 2025, and completion of The Reserve at Estuary, a 218-unit multifamily development in Weehawken in 2025. The company maintains a New York office at 667 Madison Avenue and holds properties including the Soho Grand and Roxy Hotel in Manhattan.