Inactive

Quadrangle Group

Investor type

PE

Founded

2000

AUM

$6 000 M

Location

New York, New York, United States

Investment Ticket

$10-50 m

Investment Stage

Series B Late Stage (Series C+)

Region of investment

North America
Investor profile last updated: 01 August, 2026

Profile

Quadrangle Group is a private investment firm focused on the information and communications technology and services sectors based in New York City. Quadrangle's extensive network of deep industry relationships and significant sector expertise enhance its ability to maximize value and generate strong, stable results.

Industry

Consumer Products Consumer Services (B2C) Financial Services Fintech Media and Entertainment Telecommunications

Quadrangle Group Funds

Name Type
Questionare
Industry
Questionare
Stage
Questionare
Region
Size AUM Launch date
Quadrangle Capital Partners Fund
Private Equity (PE)
Financial Services
Fintech
Media and Entertainment
Telecommunications
Series B
Late Stage (Series C+)
North America
$5-10 m
$2000 M
December 2000

Contacts

Name
Title
Email
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Joshua Steiner Managing Principal
Managing Principal
j•••@•••
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Catherine Costopoulos Property Manager
Property Manager
c•••@•••
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Investment-team contacts for Quadrangle Group — including verified work emails and LinkedIn profiles — are available to Private Equity List subscribers.
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FAQs about Quadrangle Group

Quadrangle Group is a private equity firm. It backs companies at Series B and Late Stage (Series C+), writing tickets of $10-50 m.
Quadrangle Group is located in New York, New York, United States.
Quadrangle Group was founded in 2000.
Quadrangle Group invests in companies and startups in Consumer Products, Consumer Services (B2C), Financial Services, Fintech, Media and Entertainment, Telecommunications.
Quadrangle Group invests in companies and startups in North America.
Quadrangle Group invests in companies and startups at Series B, Late Stage (Series C+).
Quadrangle Group usually invests $10-50 m on average.
Quadrangle Group has around $6 000m assets under management.
Quadrangle Group last fund was created/launched in 2000-12-10
Quadrangle Group can be reached through its website quadranglegroup.com and its LinkedIn page. Its general enquiries address is [email protected]. Cold-mailing a general inbox rarely reaches a partner, so Private Equity List also lists the investment-team contacts for Quadrangle Group — names, roles, verified work emails and LinkedIn profiles — available on a Pro plan from $129/month (see pricing). Contacts are sourced from the firm's website and LinkedIn and re-verified on a rolling cycle. Spot a stale contact, or none at all? Report it — we re-run that firm within 48h and get back to you.
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Private Equity List re-verifies investor profiles on a rolling cycle, pulling from the firm's own website and LinkedIn rather than a one-off import. This profile was last updated on 01 August, 2026. Something out of date here? Report it — we re-run that firm within 48h and get back to you.