Sebastian Siemiatkowski, CEO and Co-Founder of Swedish fintech Klarna, gives a thumbs up during the company’s IPO at the New York Stock Exchange in New York City, U.S., Sept. 10, 2025.Brendan McDermid | ReutersLONDON — It's been a busy week for the European technology sector.On Tuesday, London-headquartered artificial intelligence startup ElevenLabs announced it would let employees sell shares in a secondary round that doubles its valuation to $6.6 billion.Then, Dutch chip firm ASML on Wednesday confirmed i ...