Cloud storage firm Dropbox, one of the best-known Silicon Valley startups, has no imminent plans for a public share offering, founder and chief executive Drew Houston said Monday. "We don't have any plans right now," Houston said during a question-and-answer session at the TechCrunch Disrupt conference in San Francisco. Dropbox, a popular application which allows individuals and businesses to access documents, photos and data from multiple devices, has a valuation estimated at some $10 billion, according to the research firm CB Insights.



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