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Multi Family OfficeInvests through funds, not into companiesLAST VERIFIED Aug 2026 · 1 SOURCES

Quadrangle Group

Multi family office in the United States, founded 2000; focus on media, fintech and software.

Identity

HEADQUARTERS
United States
FOUNDED
2000

Investment approach

SECTORS
Media & EntertainmentFintechSoftware & SaaS

Overview

Founded in 2000, this multi family office has its headquarters in the United States. Its sector focus covers media, fintech and software. 4 people are named on its team.

People

  • Steven Rattner
    Founder · source
  • Peter Ezersky
    Managing Principal · source
  • Joshua Steiner
    Co-founder · source
  • David Tanner
    Co-founder · source

Frequently asked questions

Quadrangle Group is a multi family office based in the United States, founded in 2000.

Quadrangle Group does not publicly state whether it puts its own money into companies or invests through funds.

Quadrangle Group invests in Media & Entertainment, Fintech and Software & SaaS.

Key people at Quadrangle Group include Steven Rattner (Founder), Peter Ezersky (Managing Principal), Joshua Steiner (Co-founder) and David Tanner (Co-founder).