The 2019 LinkedIn Top Startups list reveals the 25 hottest companies where UK professionals want to work now.With the 3rd annual Top Startups ranking, we uncover the young companies commanding professionals’ attention today: the ones that are growing massively, scrambling industries, shifting talent flows around the world and, often, altering how we work and live.Our editors and data scientists parsed billions of actions generated by LinkedIn’s 645 million members – and looked at four pillars in particular: employee growth; jobseeker interest; member engagement with the company and its employees; and how well these startups pulled talent from our flagship LinkedIn Top Companies list. To be eligible, companies must be 7 years old or younger, have at least 50 employees, be privately held and headquartered in the UK. (You can learn more about our methodology at the bottom of this article.)