Full coverage: Twitter

It's not immediately obvious how to fix Twitter's broken business model. $1 billion in annual interest payments as a result of the Musk takeover should concentrate minds.

The author, former New York Times journalist and Covid-19 vaccine sceptic Alex Berenson is taking steps to sue Twitter in Ireland for alleged defamation. He was kicked off the platform last year for violating Twitter's Covid-19 misleading information policy.

By locating intellectual property in Ireland, Twitter was planning to shrink taxable profits for 15 years. Now the social network is not so sure the green jersey scheme is going to deliver.

Having raised another €1.6m for his second start-up Kinzen, Mark Little talks about combining machine and human brainpower to tackle online misinformation, becoming a leader at Twitter and his thoughts on public service journalism.

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.

In yet another case taken against social media giants, former Fianna Fáil TD Frank O'Rourke has started legal actions against Twitter and Facebook

The German entrepreneur Christian Angermayer wears many hats. He is an investor, film enthusiast, and psychedelics proselytiser with business links to controversial Silicon Valley billionaire Peter Thiel. So why is he and the tech firm Northern Data suing Twitter?

Motivational guru Tony Robbins is the latest celebrity plaintiff to target the Irish headquarters of a global social media company. Belfast defamation lawyer Paul Tweed is fighting the case once again.

Mapping Multinationals series: A US Tax Court has turned the spotlight on the Irish corporate structure developed by Facebook over the past decade. We reveal how the multinational and its competitor Twitter have been re-assessing how to channel profits and intellectual property through Ireland.