This paper investigates whether shareholder lockup agreements in France and Germany mitigate problems of agency and asymmetric information. Despite minimum requirements in terms of the length and percentage of shares locked up, lockup agreements are not only highly diverse across firms but also across the different shareholders of a single firm as most firms have different agreements in place for executives, non-executives and venture capitalists. The diversity across firms and types of shareholders can be explained by firm characteristics—such as the level of uncertainty—as well as the type and importance of each shareholder within the firm.

This paper investigates the market's reaction to U.K. insider transactions and analyzes whether the reaction depends on the firm's ownership. We present three major findings. First, differences in regulation between the U.K. and United States, in particular the speedier reporting of trades in the U.K., may explain the observed larger abnormal returns in the U.K. Second, ownership by directors and outside shareholders has an impact on the abnormal returns. Third, it is important to adjust for news released before directors' trades. In particular, trades preceded by news on mergers and acquisitions and CEO replacements contain significantly less information.