Laura Citron, CEO of London & Partners, London's business growth agency, told CNBC that the U.K. capital is the perfect place for Arm to go public. According to her, London has Europe's biggest technology hub and is also a financial centre. It is a great place to launch a tech company. Citron said: "Arm, a U.K. technology success story is London. London would make it a great home when it becomes a publicly traded company." SoftBank had planned to sell Arm and Nvidia to Nvidia at $40 billion, but it was stopped by the deal collapsed SoftBank has decided that it will not launch an Arm IPO because of growing regulatory scrutiny earlier this month. SoftBank CEO Masayoshi son told investors during an earnings call that Arm would be IPO'd likely take place on New York's Nasdaq stock exchange The London Stock Exchange has lost its tech ambitions.