If the San Francisco-based online file-storage company— last valued by private-market investors at about $10 billion — follows through on going public, it will become one of the highest-profile technology companies of late to seek a stock-market listing.

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Dropbox, the online file-storage company, has filed documents to go public, people briefed on the matter said Thursday.

If San Francisco-based Dropbox — last valued by private-market investors at about $10 billion — follows through on an initial public offering, it will become one of the highest-profile technology companies of late to seek a stock-market listing.

Dropbox filed confidentially with the Securities and Exchange Commission, which companies that are generating less than $1 billion a year in revenue can do, affording it time to make its preparations away from the glare of potential investors.

The company is aiming to begin trading on a stock market in the spring, one of the people briefed on the matter added, cautioning that the timing of an IPO is fluid and may change.

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Representatives for Dropbox declined to comment on the filing.