Motif Investing, the creator of an online investment platform, has raised $25 million in Series C financing. Goldman Sachs led the round alongside previous backers Foundation Capital, Ignition Partners and Norwest Venture Partners. True to its moniker, Motif Investing enables customers to invest in theme-based portfolios of stocks, bonds and exchange-traded funds (also known as motifs). In conjunction with the round, Darren Cohen of Goldman Sachs will join Motif’s Board as an observer. The San Mateo, CA-based company closed on a $20 million Series B round in September 2011.