Full coverage: Personal data

Online retailers' ability with data is an important reason why they're crushing their bricks-and-mortar retail competition. For this reason and others, it's hard to see offline retail coming back – in fact, healthcare is about to see the same disruption.

Twitter is the latest multinational to reveal a multi-billion intellectual property onshoring in Ireland, suppressing its tax liability here in the process. The company and its rival Facebook are also bracing for the first significant data protection fines under GDPR.

Irish entrepreneur Cillian Kieran's data privacy start-up Ethyca has just closed its second funding round. In an in-depth interview, he discusses dealing with investors in Wall St and Silicon Valley, doing business in the US amid a pandemic and civil rights protests – and disputes the suggestion that the liquidation of his previous business was a failure.

Altada was heralded by global research firm Gartner. IBM liked its product. But a courtroom battle between its founders took the company into examinership.