"The Details: Tenable Holdings Chairman and CEO Amit Yoran passed away yesterday at 54 after an unexpected turn in his cancer battle. The cybersecurity pioneer had taken medical leave since December 5, with CFO Steve Vintz and COO Mark Thurmond serving as interim co-CEOs. The Legacy: Under Yoran's leadership since 2016, Tenable became a global cybersecurity leader, successfully going public in 2018 with over half of Fortune 500 companies as customers. His career included founding multiple security companies and serving as Homeland Security's National Cyber Security Director."