Hartz Mountain Industries Inc is a privately held real estate development and management company based in New Jersey, United States. The company was founded in 1966 by Leonard N. Stern, who served as its chairman until his death in 1998. Since then, the company has been run by his daughter, Deborah Stern, who serves as the president and CEO.

The company's primary focus is on the development, ownership, and management of commercial and residential properties. It operates in the multi-asset class own and develop sector, which means that it invests in a variety of asset classes, including office buildings, retail centers, residential properties, and industrial facilities.

Hartz Mountain Industries Inc has a diverse portfolio of properties across the United States, with a concentration in the Northeast and Mid-Atlantic regions. The company owns and manages over 200 properties, totaling more than 38 million square feet of space. Its properties range from high-end office buildings in Manhattan to industrial facilities in New Jersey.

One of the company's key strengths is its ability to develop properties from the ground up. Hartz Mountain Industries Inc has a team of experienced developers, architects, and engineers who work together to design and build properties that meet the needs of their tenants. The company also has a strong track record of redeveloping and repurposing existing properties to meet changing market demands.

In recent years, Hartz Mountain Industries Inc has expanded its focus to include renewable energy projects. The company has recognized the importance of sustainability and has made a commitment to reducing its carbon footprint. As part of this effort, it has developed several solar energy projects on its properties.

One of the company's most significant renewable energy projects is a 10-megawatt solar facility in Kearny, New Jersey. The facility, which was completed in 2019, is one of the largest solar installations in the state. It consists of over 36,000 solar panels and generates enough electricity to power over 1,500 homes.

Hartz Mountain Industries Inc has also installed solar panels on several of its other properties, including an industrial building in Secaucus, New Jersey, and an office building in Hackensack, New Jersey. These installations have helped the company reduce its carbon footprint and lower its energy costs.

In addition to its renewable energy projects, Hartz Mountain Industries Inc is committed to sustainability in other areas as well. The company has implemented several green initiatives across its properties, including the use of energy-efficient lighting and HVAC systems, the installation of low-flow toilets and faucets, and the implementation of recycling programs.

Hartz Mountain Industries Inc is also committed to giving back to the communities in which it operates. The company has a long history of supporting local charities and organizations, and it encourages its employees to volunteer their time and resources to help those in need.

Overall, Hartz Mountain Industries Inc is a well-respected real estate development and management company that has a proven track record of success. Its focus on sustainability and renewable energy projects demonstrates its commitment to being a responsible corporate citizen. As the company continues to grow and expand, it will undoubtedly remain a leader in the real estate industry and a valuable contributor to the communities it serves.