No details of that agreement were disclosed in the final divorce order filed on Monday in King County Superior Court in Seattle.
The court did not issue money, property or spousal support judgments in the divorce. It said the couple must comply with the terms of the separation contract that was not filed in King County Superior Court.
The Seattle-based Bill & Melinda Gates Foundation has become one of the most powerful and influential forces in global public health, spending more than $50 billion over the past two decades to bring a business approach to combating poverty and disease.
The Gateses have backed widely praised programs in malaria and polio eradication, child nutrition and vaccines. The foundation last year committed some $1.75 billion to COVID-19 relief.