Lead Edge Capital, a private equity firm, led a $20m Series B round in Nucleus, a computer and network security company, with participation from Arthur Ventures. “Providing the best customer experience and the best risk-based vulnerability management platform for large enterprises remains our top priority. To accomplish this, we believe that it is key to be investing in our team and ensuring that Nucleus remains one of the best cybersecurity startups to work for,” Steve Carter, Nucleus Co-Founder and CEO.