MDC Partners

Challenger holding company to the traditional 'Big Six,' known for creatively acclaimed independent agencies; merged into Stagwell Inc. in 2021

MDC Partners was a Canadian-American marketing and communications holding company founded in 1980 and headquartered in New York City. Over four decades, it built a portfolio of some of the most creatively acclaimed independent advertising agencies in the world, including Crispin Porter + Bogusky, Anomaly, 72andSunny, Doner, Forsman & Bodenfors, and others. The company traded on the NASDAQ under the ticker MDCA and positioned itself as a challenger to the traditional 'Big Six' holding companies by emphasizing creative excellence and entrepreneurial agency culture. MDC Partners pursued a strategy of acquiring minority and majority stakes in high-profile creative shops, allowing those agencies to retain operational independence while benefiting from shared back-office infrastructure, financial resources, and cross-network collaboration. This model attracted some of the industry's most celebrated creative talent and helped MDC agencies win numerous Cannes Lions and Effie Awards. However, the company also faced significant financial pressures, governance controversies, and mounting debt that challenged its long-term independence. On August 23, 2021, MDC Partners completed a merger with Stagwell Marketing Group — a digital-first marketing network founded by former Microsoft president Mark Penn — to form Stagwell Inc. The combined entity, which trades on NASDAQ under the ticker STGW, took the Stagwell name, and the MDCA ticker was delisted. The merger brought together MDC's creative agency portfolio with Stagwell's technology-driven marketing capabilities, creating a scaled challenger holding company positioned to compete with WPP, Publicis, Omnicom, and Interpublic.