AppNexus is a technology company that provides trading solutions and powers marketplaces for Internet advertising. Our open, unified, and powerful programmatic platform empowers customers to more effectively buy and sell media, allowing them to innovate, differentiate, and transform their businesses. As the world's largest independent ad tech company, AppNexus is led by the pioneers of the web's original ad exchanges. Headquartered in New York City with ten global offices, we employ hundreds of the brightest minds in advertising and technology who believe that advertising powers the Internet.
Company Growth (employees)
New York, US
Size (employees)
1,038 (est)
AppNexus was founded in 2007 and is headquartered in New York, US

Key People at AppNexus

Brian O'Kelley

Brian O'Kelley

CEO & Co-Founder
Michael Rubenstein

Michael Rubenstein

Ben John

Ben John

Chief Technology Officer
Ryan Christensen

Ryan Christensen

Chief Operating Officer
Jonathan Hsu

Jonathan Hsu

Brandon Atkinson

Brandon Atkinson

Catherine Williams

Catherine Williams

Chief Data Scientist

AppNexus Office Locations

AppNexus has offices in New York, San Francisco, Portland, Seattle and in 21 other locations
New York, US
Boulder, US
Philadelphia, US
London, GB
São Paulo, BR
Eugene, US
Mountain View, US
Los Angeles, US
Louisville, US
Baltimore, US
Conshohocken, US
Miami Beach, US
Singapore, SG
Ecublens, CH
Quimper, FR
München, DE
Madrid, ES
São Paulo, BR
Sydney, AU
Hamburg, DE

AppNexus Metrics

AppNexus Summary

Founding Date


Market valuation*

$1.8 b

Total Funding

$319.2 m

Latest funding size

$31 m

Time since last funding

6 months


* Source:
We estimate that AppNexus's latest funding round in September 2016 was $31 m. In total, AppNexus has raised $319.2 m. We estimate that AppNexus's latest valuation is $1.8 b.

AppNexus Online Presence

AppNexus News

AppNexus Company Life

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