The Norwegian Gender Balance Law: A Reform that Failed? reviews the two promises of Gender Balance Law – the promise of greater gender equality in leadership positions in private companies and the promise of improved firm performance. This review is based on the academic literature together with long-term descriptive statistics before and after the regulation. In order to fully evaluate the reform, the author includes the unintended consequences that follow from the reform and that the lawmakers did not foresee, the most important is what we call the withering of the PLC company. It concludes that the GBL is a failed reform.