Summit Partners, the US-based venture capital investor, has made almost four times its money in only nine months after selling its investment in Jamba, a German wireless content services provider, in one of Europe's largest venture capital exits this year. has sold its investment in Jamba, a German wireless content services provider, in one of Europe's largest venture capital exits this year.

Summit, which owned a majority stake, has sold the business to Verisign, a Nasdaq-listed technology company, for $273m (€224m).