| Author(s) | Organisation(s) | Session |
| O'Neill, Peter | University of New South Wales | Man or Machine? Presenter |
| Obernberger, Stefan | Erasmus University Rotterdam, Netherlands, The | Empirical Capital Structure Gender and Corporate Finance Discussant |
| Oh, Sangmin | Chicago Booth, United States of America | Understanding the Long-Run Drivers of Asset Prices |
| Ohneberg, Elias | University of Cambridge - Judge Business School | Lunch & Poster Session |
| Olivier, Jacques | HEC Paris, France | Asset Pricing Theory Presenter |
| Ongena, Steven | University of Zurich, Switzerland; University of Zürich, Swiss Finance Institute, KU Leuven, NTNU Business School, and CEPR; KU Leuven, Belgium; NTNU Business School, Norway; CEPR, UK | Lunch & Poster Session Corporate Lending Crimes, Leaks and Sanctions Green Banks? Gender Discrimination |
| Opp, Christian | University of Rochester & NBER | Understanding the Long-Run Drivers of Asset Prices Presenter |
| Oreski, Tina | ESCP Business School | Merger & Acquisitions Presenter |
| Osambela, Emilio | Board of Governors of the Federal Reserve System, United States of America | Advances in Factor Analysis Presenter |
| Ossandon Busch, Matias | Halle Institute for Economic Research (IWH); CEMLA | Financial Intermediation Linkages |
| Ostergaard, Charlotte | Copenhagen Business School | Gender and Corporate Finance Discussant |
| Ottonello, Giorgio | Nova School of Business and Economics, Portugal | Bond Pricing in Credit Markets Presenter Intersection of Corporate Financing with Capital Markets Discussant |
| Ozel, N. Bugra | University of Texas at Dallas | Labor markets Presenter |