This chapter documents the evolution of ownership and control of firms around the world over a hundred year period from the beginning of the 20th century to today. It records the substantial changes that have taken place in the nature of stock markets and contrasts these with the persistent patterns of ownership that are observed in many countries around the world. In particular, it documents the growth in dispersion in ownership that took place in many countries from the early part of the 20th century. It reports that this took place in the absence of formal systems of investor protection but in the presence of institutional developments that facilitated the building of trust between investors and firms. Contrary to the view that concentra...