IRIS Software, a software provider of accountancy and payroll solutions, completed the acquisition of Apex HCM, a cloud-based HCM enterprise software provider, from Serent Capital, a private equity firm. Financial terms were not disclosed. “We are delighted to welcome Apex to the IRIS family. This acquisition continues our successful journey providing leading software to PSBs and CPA firms – a market which IRIS has been serving for decades in the UK and we are rapidly expanding in the Americas region," Elona Mortimer-Zhika, IRIS CEO.