An institutional funder is one run by a regional, national or international body rather than a foundation or company. Arbitrarily this question also resolves positively for the Gates Foundation but only that foundation.

Therefore orgs which might resolve this question positively:

• The World Bank

• The UK Government

• The UN WFP

• The Gates Foundation
  

Orgs which will not resolve this question positively:

• Any non-Gates Foundation foundation

• Google