Michael Sonnenfeldt

Michael W. Sonnenfeldt is a serial entrepreneur, investor, and philanthropist, best known as the founder of TIGER 21, the premier peer network for high-net-worth wealth creators and preservers. Today, Michael leads TIGER 21 as Founder and Chairman. TIGER 21’s global network of 2,000 Members collectively manages their own investible assets of over $280 billion with 164 Groups that meet monthly in 54 cities across 11 countries, including recent expansions to Milan, Singapore, Dubai, and Mumbai. He is also the Founder and Chairman of MUUS & Company, a private entrepreneurial investment company, drawing on decades of experience in real estate, private and public equity, and venture capital.

Earlier in his career, Sonnenfeldt led one of the world’s largest commercial renovations, transforming Jersey City’s Harborside Financial Center into one of the largest redevelopment projects in the country, at that time. He also founded real estate investment firm Emmes & Company which acquired what grew to over $1 billion in assets. He also served as Chairman of Carmanah Technologies, a publicly traded leading manufacturer of solar signaling and lighting systems, as its largest shareholder. Sonnenfeldt earned his Bachelor’s and Master’s degrees in management from MIT where he was Phi Beta Kappa, and has spent decades underwriting major academic initiatives in environmental sustainability including the Goldman Sonnenfeldt Environmental Protection Clinic at Yale Law School and the Goldman Sonnenfeldt School of Sustainability and Climate Change at Ben Gurion University. He is also a founding donor to MIT’s Climate Policy Center. Sonnenfeldt sits on the board of the Center for a New American Security, and is co-founder of the national Japanese craft award hosted by JapanCraft21 in Tokyo. A designer and collector, he owns the MUUS Collection, a leading archive of American 20th century photography that focuses on entire estates of photographers who capture pivotal moments in our country’s history.

Michael Sonnenfeldt hosts the NEXT podcast, which features intimate conversations about wealth, purpose, and legacy after major success. His opinion pieces have most recently appeared in Fortune Magazine, The Atlantic, and Kiplinger and he is a sought-after speaker on high-net-worth issues, including wealth creation and preservation and the evolving role of family offices.