Aquamarine has obtained funding from corporate and governmental sources as it looks to develop its marine energy technology.

Gaurav Bhandari, managing director at Goldman Sachs, said: "The growing dependence on earned media requires robust marketing decision platforms capable of uncovering real time data on consumer messaging, engagement and share of voice."

Gail Ennis, chief executive of Karmasphere, said: "Shun Aramaki, who led the investment in Karmasphere, brings with him a wealth of big data market expertise."

Bertelsmann Digital Media Investments (BDMI) and T-Venture, Deutsche Telekom's corporate venturing, invested alongside venture capital fund Neuhaus Partners, which had backed Content Fleet since last year division of technology service provider Getanet.

The financing was led by Energy Ventures, a Norway-based venture investment fund, and included investment bank Harris and Harris Group and a limited partnership comprised of Ohio-based industrialists.

Alongside Amgen Ventures, which was founded in 2004, in Ardelyx's $30m B round were venture capital firms NEA and CMEA and individual investors.

Business Insider had previously raised $7m, according to news provider TechCrunch.