Moroccan state-controlled phosphate company Office Cherifien des Phosphates (OCP) pledged to donate at least $1m to the Clinton Foundation ahead of Hilary Clinton launching her second bid to become president of the US.
The donation was reported by the current affairs website Politico on 9 April.
It comes ahead of a Clinton Global Initiative (CGI) meeting that is being hosted in Morocco in May.
CGI is a subsidiary of the Clinton Foundation.
Clinton Foundation officials have said that OCP was a sponsor of the Marrakesh meeting and that sponsor funding would be used for the events logistics and production.
Casablanca-based OCP is the worlds leading producer of phosphate rock and one of the worlds biggest fertiliser exports.
OCP has been criticised in the past for exploiting phosphate deposits located in the disputed territory of Western Sahara.