Tenable Holdings ^{Priced, Nasdaq: TENB}

We are the first and only provider of solutions for a new category of cybersecurity that we call Cyber Exposure. Cyber Exposure is a discipline for managing and measuring cybersecurity risk in the digital era. Our enterprise platform enables broad visibility into an organization’s cyber exposure across the modern attack surface and deep insights that help organizations translate vulnerability data into business insights to understand and reduce their cybersecurity risk. Our enterprise platform offerings are primarily sold on a subscription basis with terms ranging from one to three years, primarily one year. These offerings are typically prepaid in advance. To a lesser extent, we generate ratably recognizable revenue from perpetual licenses and from the related ongoing maintenance. Revenue from perpetual license sales is recognized ratably over a five-year estimated economic life in accordance with ASC 606. Revenue from our enterprise platform offerings accounted for 58%, 67%, 64% and 72% of total revenue in 2016, 2017 and the three months ended March 31, 2017 and 2018, respectively.