Irish health software firm Clanwilliam Group has taken a majority shareholding in Auckland's HealthLink, adding the market-leading secure messaging vendor in Australia and New Zealand to its growing portfolio of local companies.

Dublin-based Clanwilliam, part of the multi-national Eli Global private equity firm, bought NSW billing and practice management software vendor Medical Business Systems in February and then picked up Kiwi pharmacy software market leader Toniq in May.