Google 
Acquired DoubleClick - Official Press release here 
This is the official news -
"Google announced today a definitive agreement to acquire DoubleClick Inc., a global leader in digital marketing technology and services, for $3.1 billion in cash from San Francisco-based private equity firm Hellman & Friedman along with JMI Equity and management. The acquisition will combine DoubleClick's expertise in ad management technology for media buyers and sellers with Google's leading advertising platform and publisher monetization services.
The combination of Google and DoubleClick will offer superior tools for targeting, serving and analyzing online ads of all types, significantly benefiting customers and consumers:
- For users, the combined company will deliver an improved experience on the web, by increasing the relevancy and the quality of the ads they see.
- For online publishers, the combination provides access to new advertisers, which creates a powerful opportunity to monetize their inventory more efficiently.
- For agencies and advertisers, Google and DoubleClick will provide an easy and efficient way to manage both search and display ads in one place. They will be able to optimize their ad spending across different online media using a common set of metrics.
About Google:
Google's innovative search technologies connect millions of people around the world with information every day. Founded in 1998 by Stanford Ph.D. students Larry Page and Sergey Brin, Google today is a top web property in all major global markets. Google's targeted advertising program provides businesses of all sizes with measurable results, while enhancing the overall web experience for users. Google is headquartered in Silicon Valley with offices throughout the Americas, Europe and Asia. For more information, visit www.google.com
About DoubleClick:
DoubleClick is a provider of digital marketing technology and services. The world's top marketers, publishers and agencies utilize DoubleClick's expertise in ad serving, rich media, video, search and affiliate marketing to help them make the most of the digital medium. From its position at the nerve center of digital marketing, DoubleClick provides superior insights and insider knowledge to its customers. Headquartered in New York, and with 17 offices and development hubs and 15 data centers worldwide, the company employs more than 1200 people and delivers billions of digital communications every day. Learn more at www.doubleclick.com "
