This chapter deals with gender equality in business law. For some time now, gender diversity has played an important role in the composition of dispute resolution bodies, boards of directors and supervisory boards, forcing the companies concerned to take action. The underlying initiatives of the EU regarding gender quotas in companies, as described in the chapter, are beginning to have an effect, as developments in the banking and financial sector also show. Although the European internal market and its fundamental freedoms do not have a direct impact, the European Union is strongly committed to the protection of gender equality, the economic empowerment of women as well as female entrepreneurship. This chapter explains in detail how forms of enterprises, financing options, education and networking can support women to become entrepreneurs and play a crucial role in business decision-making. Finally, the chapter describes the impact of international trade and investment agreements in this field. Gender mainstreaming now takes place in all recent trade agreements and opens up new opportunities for women. Although investment agreements secure and support foreign investments, which are needed to improve the welfare of states and their citizens, they also could undermine the promotion of gender equality in the investor state. These new changes could jeopardise the investment as national rules will be legally obliged to be changed.