In a period that favoured consolidation over acquisition, Cello saw overall revenue leap 44% to £66.1m compared to £45.8m for the same period last year. Chief executive Mark Scott described the gains as a "strong performance".
During the six months the market research and marketing services group won several big-name clients including Kraft, Warner Bros, Eurostar and Lush.
This year Cello consolidated its businesses into two main arms: the first Research and Consulting, which focuses on market research and data management; and the second Tangible:group, which is focused on response-driven business including direct marketing, digital and advertising agencies.
At the beginning of the month executive chairman Kevin Steeds announced he would be temporarily stepping down from his position with the company due to serious illness.
Despite the unfortunate circumstances, Scott remains optimistic.
"Both our research business and our response business have now emerged as major operators in their respective markets, competing for the largest contracts previously the preserve of long established global incumbents.
"We now face the more challenging macro environment in a strong position, with an excellent client list, a focused group of professionals and a strong balance sheet."