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Company Profile:


Why: Microblogging has become a ubiquitous adjunct to major events, from earthquakes to revolutions.

Key innovation: A redesigned mobile application encourages users to discover content relevant to them while remaining within the ambit of Twitter rather than turning to third-party systems.

Private Company: Twitter
Headquarters: San Francisco
Founded: 2006
Founders: Jack Dorsey, Biz Stone, Evan Williams
Funding Raised: Not disclosed
Key Investors: Union Square Ventures, Spark Capital, Benchmark Capital, Kleiner Perkins Caufield & Byers