Plato Partnership, a joint initiative between asset managers and investment banks, has added another 15 partners to its ranks, bolstering ambitions to facilitate trading of large blocks of shares in Europe.

The new members are joining the not-for-profit consortium ahead of the implementation of new European trading rules in January 2018. The EU's revised Markets in Financial Instruments Directive, or Mifid II, is set to overhaul market structure in the region.