Abu Dhabi's Mubadala Investment Co. plans to invest as much as $15 billion in SoftBank Group Corp.'s Vision Fund and start two new venture capital funds to build its technology holdings.

The SoftBank fund will be "wrapped up" in two to three weeks with about $95 billion of commitments, according to Ibrahim Ajami, head of venture capital at Mubadala Capital, the sovereign wealth fund's investment arm.

Mubadala plans to make its investment over the next five years, he said.