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Quadrangle Group
Quadrangle Group was established in 2000 by Steven Rattner and three Lazard colleagues. Capital originated from the partners' investment-banking earnings and...
Quadrangle Group
Quadrangle Group was established in 2000 by Steven Rattner and three Lazard colleagues. Capital originated from the partners' investment-banking earnings and early media private equity activity. The firm pursues buyout and growth investments in private equity, distressed situations, hedge funds and private credit. Confirmed focuses include media and entertainment plus enterprise software. Geographic reach spans North America, Europe, Asia, Africa, South America and the Caribbean. Named relationships include former operating principal Daniel Rosensweig, now CEO of Chegg. Team size and total deployment remain undisclosed. The firm maintains the Quadrangle Group Foundation Inc. and holds memberships in the Young Presidents Organization, Paley Center International Council and Council on Foreign Relations. No operational events from the last 24 months appear in available records. The structure traces to a former Lazard media team that converted banking relationships into a dedicated multi-family platform focused on sector-specific holdings rather than broad mandates.
General information
Firm type
Multi Family Office
Year founded
2000
Location
Region
North America
Country
United States
City
New York
Corporate office
New York, NY, United States
Principals
Steven Rattner
Founder
Peter Ezersky
Managing Principal
Joshua Steiner
Co-founder
David Tanner
Co-founder
Sector focus
Frequently asked questions
Who runs investment decisions at Quadrangle Group?
Peter Ezersky serves as current Managing Principal. Steven Rattner, Joshua Steiner and David Tanner founded the firm; Rattner now chairs Willett Advisors while Steiner works at Bloomberg LP and Tanner at Three Mile Capital.
Where does the underlying wealth come from?
The capital base stems from the founders' earnings at Lazard and early media-focused private equity transactions completed before 2000.
Does Quadrangle Group participate in fund commitments or only direct deals?
The firm deploys through private equity, distressed and turnaround strategies, hedge funds and private credit. Specific fund or direct allocation splits are not disclosed.
What investment stages does Quadrangle Group typically target?
Buyout and growth stages form the core focus according to the firm's documented strategy.
How is Quadrangle Group related to Michael Bloomberg?
The firm previously managed personal and foundation assets for Michael Bloomberg until 2010.
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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