Empire State Realty Trust, Inc. (ESRT) is a leading real estate investment trust (REIT) that specializes in owning, managing, and operating Class A office and retail properties in New York City. The company was founded in 2013 and is headquartered in New York, United States. ESRT is a publicly traded company listed on the New York Stock Exchange (NYSE) under the ticker symbol "ESRT".

ESRT's portfolio includes some of the most iconic properties in New York City, including the Empire State Building, One Grand Central Place, and One Penn Plaza. The company's properties are located in prime locations in Midtown Manhattan, which is known as the Central Business District (CBD) of New York City. ESRT's properties are leased to a diverse group of tenants, including financial services firms, law firms, media companies, and technology companies.

ESRT is committed to sustainability and has taken several initiatives to reduce its carbon footprint and promote decarbonisation. The company has set a goal to reduce its greenhouse gas emissions by 50% by 2030, compared to its 2013 baseline. ESRT has also signed the New York City Carbon Challenge, which is a voluntary program that encourages businesses to reduce their carbon emissions by 30% in 10 years.

ESRT has implemented several energy efficiency measures in its properties, including upgrading lighting systems, installing energy-efficient HVAC systems, and implementing building automation systems. The company has also installed a 10,000 square foot solar panel array on the roof of the Empire State Building, which generates renewable energy and reduces the building's carbon footprint.

ESRT has also entered into several corporate power purchase agreements (PPAs) to promote renewable energy. In 2019, the company signed a 15-year PPA with Green Mountain Energy to purchase 300,000 megawatt-hours of wind energy annually. This PPA will offset 100% of the electricity consumption of ESRT's New York City properties.

ESRT has also partnered with NRG Energy to install a 4.8-megawatt fuel cell system at One Penn Plaza. This fuel cell system generates clean energy and reduces the building's reliance on the grid. ESRT has also installed electric vehicle charging stations at several of its properties to promote the adoption of electric vehicles.

ESRT has received several awards and recognitions for its sustainability initiatives. The company has been named to the Dow Jones Sustainability North America Index for five consecutive years and has been recognized as a Green Lease Leader by the Institute for Market Transformation.

ESRT is also committed to corporate social responsibility and has taken several initiatives to support its local communities. The company has partnered with several non-profit organizations to promote education, health, and wellness initiatives. ESRT has also implemented several diversity and inclusion initiatives to promote a diverse and inclusive workplace.

In conclusion, Empire State Realty Trust, Inc. is a leading real estate investment trust that specializes in owning, managing, and operating Class A office and retail properties in New York City. The company is committed to sustainability and has taken several initiatives to reduce its carbon footprint and promote decarbonisation. ESRT has implemented several energy efficiency measures, installed renewable energy systems, and entered into corporate PPAs to promote renewable energy. The company has also taken several initiatives to support its local communities and promote diversity and inclusion in the workplace. ESRT's commitment to sustainability and corporate social responsibility has earned it several awards and recognitions, making it a leader in the CBD Office REIT sector.