Leonard Litwin

Leonard Litwin (October 16, 1914 – April 2, 2017) was an American real estate developer who, through his company, Glenwood Management, specialized in residential construction. His firm currently owns and operates about twenty-four buildings in Manhattan. and rents about 4,200 high-end units. His buildings have a reputation for being well-built and managed.

Biography Born to a Jewish family, Litwin began his career in the nursery business with his father.

In 2006, Litwin ranked number 374 on the Forbes 400, with a net worth of approximately $1 billion. In 2007, he had dropped to number 891, with a net worth of still around $1 billion. at The Feinstein Institute for Medical Research in Manhasset, New York, and substantially supported research at several hospitals. Additionally, Litwin established The Litwin Foundation.

In 2012, at age 97, he was rated as the highest individual donor to New York State politicians in the past year, with donations amounting to $700,000. He avoided caps on his donations by using his limited liability companies (LLCs). In 2017, the Crohn's & Colitis Foundation renamed its Broad Medical Research Program to the Litwin IBD Pioneers Initiative after Litwin for his lifelong support for the IBD community.

Personal life Litwin was married to Ruth Litwin; she died in 2014. They had two daughters: Carole Litwin Pittelman, acting as the company's president, and Diane Litwin Miller.

Leonard Litwin died on April 2, 2017, at the age of 102.