Time Warner joined the online media company's existing backers, including Tribune Media, in a series B round that will support the expansion of the company's workforce.

US-based news provider Mashable secured $17m in a series B round yesterday led by Time Warner Investments, the strategic investment subsidiary of media and entertainment conglomerate Time Warner.

All of Mashable’s existing investors, including Tribune Digital Ventures, the corporate venturing unit of multimedia company Tribune Media, Updata Partners, New Market Ventures Partners, Social Starts and various angel investors, also took part in the round.

Established in 2005, Mashable runs an online news website reporting on a range of topics within…