Maire's Tahia Investments held a 90 per cent stake in the audio electronics maker, while Baird and associated interests held an 8 per cent stake, according to the Companies Office.
Fusion Electronics was seeing strong sales growth and earning more than $30 million in annual revenue, Maire told the Business Herald last year.
Baird said Maire had retained a major shareholding in Invenco, formerly known as Fusion Transactive, which provides payment technology for petrol stations.
Maire started Navman in his garage in 1986 and sold the firm to North American conglomerate Brunswick in 2004 for $108 million.
Brunswick later broke up the navigation technology maker's divisions and sold them off separately.
Maire bought into Fusion about five years ago and diversified the company into new market segments such as marine.