The two companies proposed a multi-billion euro series of asset sales two weeks ago in their efforts to get regulatory approval for the planned merger, unveiled in April. This would create a combined group with €33 billion(US$44 billion) in annual sales.
According to a
This is up from the 50 notifications of interest they had received when they published the list of disposals on 7 July.
Fontana said the companies would start discussions with potential bidders in August, but declined to say when the deadline for bids would be.
The two cement groups are seeking buyers for operations in Austria, Hungary, Romania, Serbia, Britain, Canada, the Philippines, Mauritius and Brazil to address competition regulators' concerns about their combined market power.
The sell-off will affect some 10,000 workers out of a global total of 130,000 and account for around €3.5 billion ($4.7 billion) of sales.
Fontana said "several people" had shown interest in buying all the assets put up for sale, but said the final decision determining the choice of buyer would depend on the price.
The Reuters report said that European labour unions have asked both cement groups for specific employment guarantees that would be binding for the buyers.
Asked whether Holcim would give preference to any bidders which guaranteed they wouldn't cut jobs or close sites, Fontana declined to be specific but stressed the assets for sale were not restructuring cases.
“It's not an issue. They are good assets. If there was a need [to cut jobs] I would do it," he said the briefing in Zurich.
“The divestments are linked to overlaps. They are good companies, they are competing and this will continue.”
He added that the possibility of an initial public offering or spin-off for some of the assets remained an option.
In an interview with the Wall Street Journal, said the merger was “on track” and that the two cement groups were in “advanced”" talks with European competition regulators over their proposed combination.
Anti-trust reviews are expected in about 15 countries, and Fontana said filings had already been made in the United States, Canada, Mexico, India and Russia, he told the paper.
