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TIGER 21
TIGER 21, founded by Michael Sonnenfeldt in 1999, is a peer network of 1,500+ ultra-high-net-worth members who collectively oversee $150B+ in personal...
TIGER 21
TIGER 21 is a peer membership network for high-net-worth entrepreneurs, investors, and executives. Members include individuals with significant wealth and business experience. The network facilitates peer-to-peer learning and discussion.
General information
Firm type
Multi Family Office
Year founded
1999
AUM
Undisclosed
Location
Region
North America
Country
United States
City
New York
Corporate office
New York, NY, United States
Additional offices
Winston-Salem, NC, United States
Principals
Michael Sonnenfeldt
Founder & Chairman
Sector focus
Frequently asked questions
How does TIGER 21 source investment opportunities for its members?
TIGER 21 does not source or underwrite deals as an organization. Opportunities arise organically when members share deal flow within their confidential peer groups and through informal introductions at network events. The structure means diligence is performed at the individual member level, not by the central office.
What are the admission criteria for joining TIGER 21?
Prospective members must have at least $20 million in liquid investable assets and undergo a vetting process that evaluates both financial standing and cultural fit. The firm organizes members into small groups of peers with comparable wealth and experience to ensure conversations remain candid and relevant.
Does TIGER 21 manage capital or charge fees on assets?
No. TIGER 21 is a membership organization that charges annual dues, not an asset manager that collects management fees or carried interest. This model removes conflicts of interest around capital allocation and lets members share advice without a commercial agenda.
What types of assets do TIGER 21 members typically invest in?
Aggregated member portfolio data reported by the firm shows significant allocations to private equity, real estate, venture capital, hedge funds, and public equities. Individual member allocations vary widely, but the network includes substantial exposure to direct co-investments and private company stakes sourced through member relationships.
How is TIGER 21 governed, and how are founder interests separated from the network?
Michael Sonnenfeldt founded TIGER 21 and remains chairman. He also founded MUUS Climate Partners, a separate climate-tech investment firm, and the TIGER 21 Foundation, a philanthropic entity. These operate independently from the membership network, and member investment decisions are not steered toward any Sonnenfeldt-affiliated vehicle.
Where does the collective member wealth come from?
Member wealth origins vary broadly and include entrepreneurs who sold operating businesses, real estate investors, technology founders, hedge fund managers, and some inheritors. TIGER 21 does not typically disclose the specific wealth sources of individual members, but the member base is noted for its heavy concentration of first-generation wealth creators.
What is the portfolio defense process?
Each member presents their complete portfolio to their group annually in a structured session called a portfolio defense. Other members challenge assumptions, question concentrations, and suggest alternatives. The exercise forces a rigorous justification of every allocation and is considered the network's highest-value interaction.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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