RTB ▲ +3.6% - RTB Digital, Inc. $RTB - Former United Kingdom Prime Minister Liz Truss Joins Roundtable Board of Directors, to Lead European Press Coalition RTB Digital rose 3.6% following news that former UK Prime Minister Liz Truss has joined the company's board of directors and will lead its European Press Coalition. The appointment of a high-profile political figure to lead a European expansion initiative appears to have boosted investor confidence in the company's strategic direction and market positioning. 18-SEP-2026 09:14 AM ET