The Corporate Climate Responsibility Monitor, conducted by NewClimate Institute in collaboration with Carbon Market Watch, assesses the climate strategies of 25 major global companies. It critically analyses the extent to which they demonstrate corporate climate leadership. Companies around the world are increasingly alert to the climate emergency, facing calls from a growing range of stakeholders to take responsibility for the environmental impact of their activities. Most large companies now have public climate strategies and targets, many of which include pledges that, on the face of it, appear to significantly reduce, or even eliminate, their contributions to global warming. The rapid acceleration of corporate climate pledges, combined with the fragmentation of approaches means that it is more difficult than ever to distinguish between real climate leadership and unsubstantiated greenwashing. This is compounded by a general lack of regulatory oversight at national and sectoral levels. Identifying and promoting real climate leadership is a key challenge that, where addressed, has the potential to unlock greater global climate change mitigation ambition.