Millennial Media Names Advertising Industry Veteran Stephen Root as Chief Operating Officer

BALTIMORE, MD -- (MARKET WIRE) -- April 26, 2007 -- Millennial Media, the cross-platform mobile advertising company, today announced that Stephen Root has joined the company as chief operating officer. Root brings with him proven operational expertise and deep knowledge of the digital advertising space as a result of his seven-year tenure at Advertising.com.

"During the many years that Steve and I have worked together, I have developed an appreciation and admiration for his savvy business mind and his operational leadership," said Paul Palmieri, CEO of Millennial Media. "Steve will make a significant contribution to Millennial Media's success."

During his career, Root has developed diverse functional experience and earned success in both start-up companies and traditional corporate settings. Most recently, Root served as chief operating officer of Advertising.com and senior vice president of AOL/Time Warner, where he grew the company's revenue significantly and participated on the team that executed the acquisition of Advertising.com by AOL/Time Warner. As the fourth employee at Advertising.com, Root played a significant role in raising venture capital funding for the company, optimizing the sales and marketing department and overseeing the delivery of Advertising.com's technology platform.

Prior to Advertising.com, Root developed his operational and managerial prowess in positions at TESSCO Technologies and Procter and Gamble. Root earned his Masters of Science in Mechanical Engineering at Stanford University and his Bachelor of Science at MIT.

"There is a significant and growing market opportunity in mobile advertising, and Millennial Media has the technology, expertise and business model to be the leader in the space," said Stephen Root. "I am fortunate to be joining a world-class team of wireless and interactive advertising veterans."

About Millennial Media

Millennial Media is a mobile advertising company that uses its deep understanding of mobile consumers, technologies and media to deliver advertising solutions to marketers. Our superior mobile ad-serving and optimization technologies also deliver publishers a differentiated way to monetize their mobile content. Millennial Media ad networks meet the diverse needs of advertisers with the premium Millennial Marketplace and Millennial Motion networks, and the best-in-class mobile performance marketplace, Decktrade. For more information visit http://www.millennialmedia.com

Contact Information: Contact: Kristy Cory Double Forte for Millennial Media 503-887-4544 kcory@double-forte.com