The AfDB is controlled by a Board of Executive Directors, made up of representatives of its member countries. The voting power on the Board is split according to the size of each member's share, currently 60%-40% between African (or "regional") countries and "non-regional" member countries ("donors"). The largest African Development Bank shareholder is Nigeria with nearly 9% of the vote. All member countries of the AfDB are represented on the AfDB Board of Executive Directors.