MDC Partners Inc. is a holding company based in Toronto

Toronto

Toronto is the provincial capital of Ontario and the largest city in Canada. It is located in Southern Ontario on the northwestern shore of Lake Ontario. A relatively modern city, Toronto's history dates back to the late-18th century, when its land was first purchased by the British monarchy from...

, Canada and New York

New York City

New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

. It was founded by Miles Nadal who is also the CEO of MDC Partners.

The company is primarily known for its holdings in advertising companies, especially Crispin Porter and Bogusky.

MDC Partners has stakes in:

• 6degrees Integrated Communications
• 72andSunny
• ACCENT Marketing Services
• Allison & Partners
• Anomaly
• Attention
• BOOM! Marketing
• Bruce Mau Design
• Bryan Mills Iradesso
• Capital C
• Coll+McVoy Inc
• commotion
• Communefx
• company c
• Computer Composition of Canada
• Concentric Pharma Advertising
• Crispin Porter + Bogusky
  Crispin Porter + Bogusky
  Crispin Porter + Bogusky , a member of publicly-traded MDC Partners, is an advertising agency that currently employs around 1,000 people. It was founded in 1965 by Sam Crispin.. Crispin then became partners with Chuck Porter and Alex Bogusky...
  
  
• dotglu
• Exponent PR
• Hello Design
  Hello Design
  Hello Design is a web design agency located in Culver City, California. It was founded in 1999 by CEO/Creative Director David Lai and Creative Director Hiro Niwa...
  
  
• hederson bas kohn
• HL GRoup
• hud:sun media
• Integrated Media Solutions
• Kenna
• Kirshenbaum Bond Senecal + Partners
  Kirshenbaum Bond Senecal + Partners
  Kirshenbaum Bond Senecal + Partners also known as kbs+p is a member of the MDC Partners network. It is headquartered in New York, with offices also in Atlanta, Montreal and Toronto...
  
  
• Kwittken & Company
• LIME PR + Promotions
• mono
• Northstar Research Partners
• Onbrand*
• Ramona
• Redscout
  Redscout
  Redscout, a member of publicly-traded MDC Partners , is a strategy and design firm with offices in New York and San Francisco and approximately 50 employees....
  
  
• relevent
• SKINNY
• Sloane & Company
• Source Marketing
• TargetCom
• TEAM Enterprises
• The Media Kitchen
• Trapeze
• Trend Influence
• Varick Media Management
• Veritas Communication
• VITRO
• Yamamoto Moss Mackenzie
• Zyman Group

They are the 10th largest advertising holding company in the world. Unlike other holding companies, MDC positions itself as a "partner," taking majority stakes, generally 51%. It has invested in companies in many sectors: advertising, B2B, branding, crisis management, digital/interactive, direct marketing, experiencial marketing, entertainment, investor relations, media buying, media planning, multicultural advertising, PR, product innovation, publishing, social media, strategic planning.

MDC Partners is a publicly traded company, trading on both the NASDAQ exchange under the symbol of MDCA and the Toronto Stock Exchange. It has a market cap of approx. $500MM.