Qualys, Inc., together with its subsidiaries, provides cloud-based platform delivering information technology (IT), security, and compliance solutions in the United States and internationally. It offers Qualys Cloud Apps, which include Cybersecurity Asset Management and External Attack Surface Management; Vulnerability Management, Detection and Response; Web Application Scanning; Patch Management; Custom Assessment and Remediation; Multi-Vector Endpoint Detection and Response; Context Extended Detection and Response; Policy Compliance; File Integrity Monitoring; and Qualys TotalCloud, as well as Cloud Workload Protection, Cloud Detection and Response, Cloud Security Posture Management, Infrastructure as Code, and Container Security. The company's integrated suite of IT, security, and compliance solutions delivered on its Qualys' Enterprise TruRisk Platform enables customers to identify and manage IT assets; collect and analyze IT security data; discover and prioritize vulnerabilities; quantify cyber risk exposure; recommend and implement remediation actions; and verify the implementation of such actions. It also provides asset tagging and management, reporting and dashboards, questionnaires and collaboration, remediation and workflow, big data correlation and analytics engine, and alerts and notifications that enable clients to detect vulnerabilities, and measure and remediate cyber risk. The company offers its solutions to enterprises, government entities, and small and medium-sized businesses in various industries, including education, financial services, government, healthcare, insurance, manufacturing, media, retail, technology, and utilities through its sales teams, as well as through its network of channel partners, such as security consulting organizations, managed service providers, resellers, cloud providers, and consulting firms. Qualys, Inc. was incorporated in 1999 and is headquartered in Foster City, California.

Tenable Holdings, Inc. provides cyber exposure solutions for in the Americas, Europe, the Middle East, Africa, the Asia Pacific, and Japan. Its platforms include Tenable Vulnerability Management, a cloud-delivered software as a service that provides organizations with a risk-based view of traditional and modern attack surfaces; Tenable Cloud Security, a cloud-native cloud security solutions for security teams to continuously assess the security posture; Tenable Identity Exposure, a solution to secure Active Directory environments; Tenable Web App Scanning, which provides scanning for modern web applications; Tenable Lumin Exposure View, a measurement tool; Tenable Attack Surface Management, an external attack surface management solution; Tenable Security Center, an on-premises solution that provides a risk-based view of an organization's IT, security and compliance posture; and Tenable OT Security, an operational technology security solution which provides threat detection, asset tracking, vulnerability management, and configuration control capabilities. The company also offers Nessus, a vulnerability assessment solution for cybersecurity industry and enterprise platform; and Nessus Expert, that enables users to programmatically detect cloud infrastructure misconfigurations and vulnerabilities in the design and build phase. Tenable Holdings, Inc. was founded in 2002 and is headquartered in Columbia, Maryland.

NetScout Systems, Inc. provides service assurance and cybersecurity solutions to protect digital business services against disruptions in the United States, Europe, Asia, and internationally. The company offers nGeniusONE management software to predict, preempt, and resolve network and service delivery problems, as well as facilitate the optimization and capacity planning of their network infrastructures; and specialized platforms and analytic modules to analyze and troubleshoot traffic in radio access and Wi-Fi networks. It also provides nGeniusPULSE, an active testing tool to identify infrastructure performance issues and determine application availability, reliability, and performance; and nGenius Business Analytics solution, which enables service providers to analyze their network traffic. In addition, the company offers ISNG platform for real-time collection and analysis of information-rich, high-volume packet-flow data from across the network that is displayed through the nGeniusONE Service Assurance Solution; vSTREAM, a virtualized form factor version of its intelligent data source; packet flow systems, including the nGeniusONE Service Assurance platform; and test access points. Further, it provides cybersecurity solutions to protect networks against distributed denial of service attacks under the Arbor brand, such as Arbor Sightline, Arbor Threat Mitigation System, Arbor Insight, Arbor Edge Defense, and Arbor Cloud; and advanced threat detection solutions, such as Omnis Cyber Investigator. It serves enterprise customers in various industries, including financial services, technology, manufacturing, healthcare, utilities, education, transportation, and retail; mobile operators, wireline operators, cable operators, Internet service providers, and cloud providers; and governmental agencies through a direct sales force, and indirect reseller and distribution channels. The company was incorporated in 1984 and is headquartered in Westford, Massachusetts.

Rapid7, Inc. provides cybersecurity solutions under the Rapid7, Nexpose, and Metasploit brand names. The company offers endpoint to cloud data collection and sharing applications, such as Rapid7 Insight Agent, a software-based agent that is used on assets across on-premises and cloud environments to centralize and monitor data on company's platform; Rapid7 Insight Network Sensor that analyzes raw end-to-end network traffic to increase visibility into user activity, pinpoint real threats, and investigations; Rapid7 Cloud Event Data Harvesting that offers visibility into changes made to cloud resources; and third-party integrations and ecosystem, as well as orchestration and automation solutions. It also offers various platforms, including Rapid7 managed threat complete consisting of managed detection response that delivers end-to-end threat detection and response, as well as offloads day-to-day vulnerability management operations. In addition, it provides Rapid7 threat complete consisting of InsightIDR, a security information and event management, and extended detection and response solution; and InsightVM, a vulnerability management solution that provides visibility across on-premise and remote endpoints for security teams to evaluate the business risks, and configurations, and share with their IT counterparts for remediation. Further, the company offers Rapid7 cloud risk complete, which includes InsightCloudSec, a cloud risk and compliance management solution; and InsightAppSec, a dynamic application security testing tool. It also provides professional services. It serves a range of industries, including business services, pharmaceuticals, technology, energy, financial services, healthcare and life sciences, manufacturing, media and entertainment, retail, education, real estate, travel and transportation, government, online services, telecommunications, and professional services. The company was incorporated in 2000 and is headquartered in Boston, Massachusetts.

Telos Corporation, together with its subsidiaries, provides cyber, cloud, and enterprise security solutions worldwide. The company operates in two segments, Security Solutions and Secure Networks. It provides Xacta, a platform for enterprise cyber risk management and security compliance automation; and consulting, assessment and compliance, engineering and evaluation, operations, and penetration testing services. The company also offers Telos Automated Message Handling System, a web-based organizational message distribution and management for mission-critical communications used by military field operatives; Telos Advanced Cyber Analytics solution, which is a threat feed source of global Internet Protocol addresses known to engage in potentially malicious activity, including mass scanning and generic opportunistic attacks; and Telos Ghost, a solution to eliminate cyberattack surfaces by obfuscating and encrypting data, masking user identity and location, and hiding network resources, as well as provides security and privacy for intelligence gathering, cyber threat protection, securing critical infrastructure, and protecting communications and applications. In addition, the company provides IDTrust360, an enterprise digital trusted identity risk platform for extending flexible hybrid cloud identity services; and ONYX, a touchless fingerprint biometric solution for mobile devices. Further, it offers secure mobility solutions that enable remote work and minimize operational and security concerns across and beyond the enterprise; network management and defense services for operating, administrating, and defending complex enterprise networks and services for defensive cyber operations; and operates TSA PreCheck enrollment centers. It serves the United States federal government, large commercial businesses, state and local governments, and international customers. Telos Corporation was founded in 1968 and is headquartered in Ashburn, Virginia.

SecureWorks Corp., through its subsidiaries, provides technology-driven information security solutions for protecting its customers in the United States and internationally. The company's solutions include software-as-a-service solutions; managed security services; and professional services, including incident response and penetration testing services. Its solutions enable organizations to prevent security breaches, detect malicious activity, respond rapidly to security breaches, and identify emerging threats. The company sells its solutions primarily through its referral agents, regional value-added resellers, trade associations, and managed security service providers. It serves customers in a range of industries, including financial services, manufacturing, technology, retail, insurance, utility, and healthcare sectors. The company was formerly known as SecureWorks Holding Corporation and changed its name to SecureWorks Corp. in November 2015. SecureWorks Corp. was founded in 1999 and is headquartered in Atlanta, Georgia. SecureWorks Corp. operates as a subsidiary of Dell Technologies Inc.

VirnetX Holding Corporation, through its subsidiary VirnetX, Inc., operates as an Internet security software and technology company primarily in the United States. The company develops software and technology solutions, including secure domain name registry and GABRIEL Connection Technology that are designed to secure communications over the Internet using zero trust network access. It also offers a portfolio of licenses and services, such as VirnetX One, a security-as-a-service platform that protects enterprise applications, services, and infrastructure from cyber-attacks; GABRIEL Connection Technology software development kit to assist with rapid integration of its techniques into existing software implementations; War Room software that offers safe and secure video conferencing meeting environment where sensitive communications and data is invisible to those not authorized to view it; and VirnetX Matrix that provides security for internet-enabled enterprise applications and their connected devices. In addition, the company provides GABRIEL Collaboration Suite that enables seamless and secure cross-platform communications between users' devices. It serves domain infrastructure and communication service providers, and system integrators; and enterprise customers, developers, and original equipment manufacturers of chips, servers, desktops, smart phones, tablets, laptops, net books, and other devices in the IP-telephony, mobility, fixed-mobile convergence, and unified communications markets. The company has a partnership with ObjectSecurity LLC to provide secure cyber vulnerability analysis in private cloud environments. VirnetX Holding Corporation was incorporated in 2005 and is headquartered in Zephyr Cove, Nevada.

Castellum, Inc. provides services in the areas of cybersecurity, information technology, electronic and information warfare, and information operations. Its services include intelligence analysis, software development, software engineering, program management, strategic and mission planning, information assurance, cybersecurity and policy support, data analytics, and model based systems engineering services. It serves customers in the federal government, financial services, healthcare, and other data application sectors. The company is based in Bethesda, Maryland.