such, the second quarter and updated full year fiscal 2020 guidance that we are providing today assumes increased uncertainty around new business as well as retention and expansion with existing customers, particularly in highly affected industries.
Second Quarter 2020 Guidance:Management expects revenues for the second quarter of 2020 to be in the range of $88.0 million to $88.6 million, representing 11% to 12% growth over the same quarter in 2019. GAAP net income per diluted share is expected to be in the range of $0.36 to $0.38, which assumes an effective income tax rate of 24%.Non-GAAP net income per diluted share is expected to be in the range of $0.63 to $0.65, which assumesnon-GAAP effective income tax rate of 21%. Second quarter 2020 earnings per share estimates are based on approximately 40.8 million weighted average diluted shares outstanding for the quarter.
Full Year 2020 Guidance:Management expects revenues for the full year 2020 to be in the range of $354 million to $359 million, representing 10% to 12% growth over 2019. GAAP net income per diluted share is expected to be in the range of $1.51 to $1.56, which assumes an effective income tax rate of 21%.Non-GAAP net income per diluted share is expected to be in the range of $2.46 to $2.51, which assumes anon-GAAP effective income tax rate of 21%. Full year 2020 earnings per share estimates are based on approximately 40.8 million weighted average diluted shares outstanding.
Investor Conference Call
Qualys will host a conference call and live webcast to discuss its first quarter 2020 financial results at 5:00 p.m. Eastern Time (2:00 p.m. Pacific Time) on Thursday, May 7, 2020. To access the conference call, dial (877)881-2609 in the U.S. or (970)315-0463 for international participants with conference ID #7970004. A live webcast of the earnings conference call, investor presentation, prepared remarks, and supplemental historical financial spreadsheet can be accessed at https://investor.qualys.com/events-presentations. A replay of the conference call will be available through the same webcast link following the end of the call.
Investor Contact
Vinayak Rao
Vice President, Corporate Development and Investor Relations
(650)801-6210
ir@qualys.com
About Qualys, Inc.
Qualys, Inc. (NASDAQ: QLYS) is a pioneer and leading provider of cloud-based IT, security and compliance solutions with over 15,700 active customers in more than 130 countries, including a majority of each of the Forbes Global 100 and Fortune 100. Qualys helps organizations streamline and consolidate their IT, security and compliance solutions in a single platform and build security into digital transformation initiatives for greater agility, better business outcomes and substantial cost savings. The Qualys Cloud Platform and its integrated Cloud Apps deliver businesses critical security intelligence continuously, enabling them to automate the full spectrum of auditing, compliance and protection for IT systems and web applications across on premises, endpoints, cloud, containers, and mobile environments. Founded in 1999 as one of the first SaaS security companies, Qualys has established strategic partnerships with leading cloud providers like Amazon Web Services, Microsoft Azure and the Google Cloud Platform, and managed service providers and consulting organizations including Accenture, BT, Cognizant Technology Solutions, Deutsche Telekom, DXC Technology, Fujitsu, HCL Technologies, IBM, Infosys, NTT, Optiv, SecureWorks, Tata Communications, Verizon and Wipro. The Company is also a founding member of the Cloud Security Alliance. For more information, please visit www.qualys.com.