BOSTON--(BUSINESS WIRE)--ChoiceStream, a provider of programmatic advertising for brands and agencies, today finalized a $14 million Series C funding round. This round is led by a new investor, North Atlantic Capital, and includes follow on investments from previous investors. ChoiceStream will use the investment to further develop its successful managed services offering, launch an expanded self-service product to bring the power of programmatic into the hands of brands and agencies and boost