Sawiris derives the majority of his fortune from his 38.8-percent stake in OCI N.V. and his six percent stake in Adidas.
Berzi owns a 41.95-percent stake in the leading packaged food maker through Quantum Invest BV.
Mansour stated that the company is honored to be working on its first-ever green hydrogen project.
Khalil owns a 58.1 percent stake in Raya Holding.
Mansour wants 10 percent of his investments to be green-focused.
Mansour owns a sizable 5.22-percent stake in the Cairo-based property developer.
The Egyptian billionaire has seen a steady decline in his wealth since 2008.
It now takes $6 billion to make the Forbes 400 richest list.
The billionaire Sawiris family owns 51.8 percent of Orascom Construction.
Fertiglobe is a 58-42 percent joint venture between OCI N.V. and ADNOC.