As if $125 million were not enough, Box has expanded its gargantuan funding round to $150 million, according to an SEC filing.

A company spokesperson said this will allow existing investors to “make additional investments.” The cloud storage startup had not filed the paperwork for its fifth funding round until today — although the news was announced in late July. The news was originally reported in AllThingsD. 

Since it closed its series E round, Box opened an office in Europe and brought on Google Docs’ founder Sam Schillace as its VP of Engineering, among other strategic hires. It also unveiled a host of new product features that make it easier for third-party developers to integrate with Box’s API.

The previous round was led by General Atlantic with participation from Bessemer Venture Partners, DFJ Growth, New Enterprise Associates, SAP Ventures, Scale Venture Partners, and new investor Social+Capital Partnership.

Box’s CEO Aaron Levie (pictured, above) recently revealed plans to file for an initial public offering in 2014.


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