Apple Inc was granted Overseas Investment Office approval to buy PowerbyProxi last month for a consideration exceeding $100 million.
The change in ownership of the New Zealand wireless power developer was confirmed by Apple last month, although the world's biggest technology company refused to provide any details or the terms of the agreement.
However, a summary of the OIO approval released today shows the deal needed sign-off because it crossed the $100m threshold to be considered significant business assets. The exact figure has been withheld.
At the time of the sale, 74 per cent of the company was owned by New Zealand-based investors.
PowerbyProxi was spun out of the University of Auckland.