Quantcast Expands Into Europe and Appoints UK Managing Director

Philip Macauley, Yahoo! Director of Business Development and Commercial Relations, Named Quantcast UK Managing Director

LONDON, May 18, 2010 - Quantcast announced today the appointment of Philip Macauley to UK
Managing Director, where he will be responsible for leading the company's
operations and expansion into the UK market.

Mr Macauley joins Quantcast after ten years at Yahoo!, where he most
recently held the post of Director of Business Development and Commercial
Relations. He brings Quantcast and its clients his broad expertise in media
planning, display advertising and go-to-market strategy within the digital
domain. Mr Macauley joined Yahoo! as Head of Planning and Strategy for the UK
and Pan-European market. In his tenure with the company, he has held various
senior roles including driving media agency relationships as Agency Sales
Director and leading the company's publisher efforts as Head of Publisher
Partnerships. Prior to Yahoo!, Mr Macauley was with WPP's MindShare.

With this expansion, Quantcast brings to the European advertising and
media marketplace a simplified and vastly improved way for advertisers to
understand and reach their audiences online and for publishers to deliver
real-time audiences that satisfy each advertiser's unique audience
requirements.

    - Quantcast Measurement is the world's favourite audience
      measurement solution enabling publishers to better represent their
      unique audiences and providing web site owners with accurate, directly
      measured traffic, demographic, lifestyle, business and geographic
      audience data. Best of all, Quantcast Measurement is completely free.

    - Quantcast Audience gives advertisers the ability to
      understand the distinctive characteristics of their best customers and
      deploy these proprietary models to connect with millions, or tens of
      millions, who look just like them across the web. Quantcast calls these
      "lookalikes," and by working with a wide range of leading publishers,
      only Quantcast makes lookalikes truly portable, enabling advertisers to
      take their audience model to any quality content and media partner of
      their choice.

Quantcast's services are used extensively by the advertising industry
including most of the world's major media agencies, hundreds of major
marketers and millions of websites worldwide, including such leaders as MTV
Networks, Bloomberg, The Economist, Reuters, IAC, BBC, Time Inc., NBC
Universal, Discovery Communications, TypePad, WordPress, Dailymotion, Demand
Media and LinkedIn.

"Since the launch of our global audience service in March, we've seen
strong worldwide growth, particularly in Europe," said Konrad Feldman,
co-founder and CEO Quantcast. "Phil has exceptional knowledge of the UK
marketplace, the needs of buyers and sellers, and a deep understanding of the
emergence of real-time media solutions and the value these technologies
deliver to publishers, marketers and consumers. We're delighted to have him
spearheading our UK expansion and excited for the opportunity it presents."

About Quantcast

Quantcast measures and organizes the world's audiences in real-time so
advertisers can buy, sell and connect with the people who matter most to
them. Ranked Fast Company's # 3 Most Innovative Company on the Web for 2010,
the company is used by the world's leading media agencies, hundreds of major
marketers and millions of global websites including thousands of the world's
best known destinations. Quantcast connects the planning, buying, and media
fulfilment processes, delivering the marketplace's most consistent and
accountable audiences. Launched in 2006, Quantcast is headquartered in San
Francisco and backed by Founders Fund, Polaris Venture Partners, Revolution
Ventures and Cisco Systems. Come Get Quantified(TM) at
www.quantcast.com.

Christina Cubeta of Quantcast, +1-646-216-2083, ccubeta at quantcast.com