Topspin Partners, a leading representative office of defined VC located in Roslyn Heights, was established in the United States and focuses on investing in startups in the Health Care and Genetics sectors. The firm prefers startups with a single founder and those that are 4-5 years old. They have a higher rate of exit commitments compared to other organizations and typically invest in rounds with 4-5 participants. Topspin Partners, which was created by Leigh J. Randall, Leo Guthart, and Stephen M. Lebowitz, is the successor fund to the Long Island Venture Fund and is affiliated with Renaissance Technologies.