Brian Wieser
Independent Analyst at Madison and Wall
Independent economic analysis and forecasting of global advertising markets
Last updated May 31, 2026 by the ATDb Editorial Team
Brian Wieser is an Independent Analyst at Madison and Wall, where he produces research and forecasts on global advertising markets that are widely cited across financial and trade media. His career spans senior analyst roles at Sanford C. Bernstein and Pivotal Research Group, as well as a tenure as Global President of Business Intelligence at GroupM, giving him a rare combination of Wall Street rigor and deep industry operating experience. He is recognized as one of the advertising industry's most authoritative voices on the economics of media and advertising spending.
Global President, Business Intelligence
GroupM (2021-2022)
Senior Analyst, Advertising & Media
Pivotal Research Group (2012-2021)
Senior Analyst
Sanford C. Bernstein (2000s-2012)
- MBA, University of Southern California
- Bachelor's Degree, University of Western Ontario
- Founded Madison and Wall, an independent advisory firm that produces widely cited advertising market forecasts
- Served as Global President of Business Intelligence at GroupM, the world's largest media investment company
- Consistently ranked as one of Wall Street's top equity research analysts covering advertising and media at Pivotal Research Group
- Advertising spending forecasts regularly referenced by The Wall Street Journal, Financial Times, and The New York Times
- Madison and Wall research notes and advertising market forecasts (ongoing)
- GroupM 'This Year Next Year' global advertising forecast reports (2021-2022)
- Pivotal Research Group equity research reports on advertising and media (2012-2021)