A large number of new rules which rely on disclosure requirements have been introduced in EU corporate governance in recent years, to the extent that disclosure requirements seem to be the predominant if not the only regulatory method used. This article takes a critical look at this development with the aim of assessing whether too much reliance has been put on disclosure as a regulatory instrument in this area. The arguments in favour of disclosure requirements are studied, as are those situations where disclosure is most likely to prove an ineffective or insufficient tool. Furthermore, it is examined how the current disclosure regimes in EU corporate governance can be improved to ensure that they will be more effective.