MDC Partners Inc., a privately owned advertising and marketing holding company founded in 1986 and headquartered in the US, employed approximately 5,690 people. The company operated on a partnership model, acquiring majority stakes in various agencies while retaining a portion of ownership for the original founders. MDC Partners comprised over 50 partner firms globally. In August 2021, MDC Partners merged with The Stagwell Group, resulting in the formation of Stagwell Media Network, a collection of multichannel agencies under the Stagwell umbrella.
