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Tenable announced and completed its acquisition of industrial cybersecurity firm Indegy on December 2, 2019. The announced price was $78 million in cash, subject to customary purchase-price adjustments. Indegy brought operational technology (OT) visibility and security capabilities into Tenable’s broader effort to assess IT and OT risk together.
What did Tenable acquire Indegy for?
Tenable announced the acquisition at $78 million in cash, subject to customary purchase-price adjustments. Its December 2, 2019 announcement said the deal closed that day. A U.S. Securities and Exchange Commission filing described the transaction as the purchase of all outstanding Indegy share capital for approximately $78 million in cash, with signing and closing occurring simultaneously.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
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1783-NATR Configurable Network Address Translator Router, Industrial Automation Replacement Part | $988.99 | Buy on Amazon |
Why later reports say $80.3 million
Tenable’s 2020 annual report subsequently reported total cash consideration of $80.3 million. The report’s figure includes $5.5 million of cash acquired and a $0.3 million working-capital adjustment paid in November 2020. The $78 million figure was the announced transaction consideration; $80.3 million was the later reported accounting total with those additional details. They describe the deal at different stages and on different accounting bases, rather than two competing announcement prices.
Why did Tenable buy Indegy?
Tenable’s strategic case was that industrial control networks had become part of the enterprise attack surface, while security teams often managed IT and OT risks separately. CEO Amit Yoran said, “For every company in every industry, OT is now part of the modern attack surface.” Tenable said combining its vulnerability-management expertise with Indegy’s industrial cybersecurity technology would help organizations understand and reduce cyber risk across both environments.
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- CONFIGURABLE NETWORK ADDRESS TRANSLATOR: The 1783-NATR is an industrial NAT router designed to provide secure and seamless network address translation for complex industrial control systems
- INDUSTRIAL NETWORK INTEGRATION: Engineered to facilitate secure connectivity, this NAT device enables safe communication between industrial control networks and enterprise IT infrastructures
- COMPACT AND DURABLE DESIGN: Built with industrial-grade components to withstand harsh manufacturing environments, this router ensures continuous and reliable network performance in demanding conditions
- ENHANCED SECURITY PROTOCOLS: Featuring advanced NAT capabilities, this device isolates control system traffic from external networks, protecting critical automation equipment from unauthorized access
- NEW IN BOX CONDITION: This industrial NAT router is delivered brand new in its original, unopened packaging, guaranteeing pristine hardware condition and full factory protection prior to installation
The company presented the combination as a unified, risk-based view for security leaders and plant-operations teams. The aim was to help them see OT exposures alongside IT vulnerabilities, prioritize remediation across both, and make risk easier to measure and manage at an organizational level.
What Indegy added to Tenable’s OT security capabilities
Indegy focused on industrial environments, where asset visibility and safe assessment matter because devices support physical processes. Tenable said the combined platform would add these capabilities:
- OT asset inventory and device intelligence: Identify industrial devices and provide detailed information about their components and relationships, including in multi-vendor environments.
- Configuration management: Track and manage OT device configurations as part of industrial security operations.
- Threat detection: Monitor industrial networks for activity that may indicate a security threat.
- Vulnerability management: Bring OT vulnerabilities into view alongside IT vulnerabilities, with prioritization and remediation verification.
- Passive monitoring and safe active analysis: Combine observation of network activity with non-intrusive active analysis of OT devices. The announcement described this as a complement to passive monitoring, not as a replacement for it.
- Risk measurement across IT and OT: Tenable said the combined platform would score, trend, and benchmark risk across both areas in Tenable Lumin.
How Tenable.ot relates to Indegy
Tenable’s February 4, 2020 corporate fact sheet called the industrial-network security offering “Tenable.ot, powered by Indegy.” That wording connects the product branding to Indegy’s technology. It documents how Tenable described the product at that time; it should not be read as confirmation of Tenable’s current product names, packaging, or availability.
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How the integration was expected to work
At the time of the announcement, Tenable described an initial on-premises integration and planned further integrations. Those dates are historical plans from December 2019, not a statement about what is available today.
| Product or service | Integration status stated in the December 2019 announcement |
|---|---|
| Tenable.sc, Tenable’s on-premises vulnerability-management product | Integration with the Indegy Industrial Cybersecurity Suite was described as available at announcement. |
| Tenable.io, Tenable’s cloud vulnerability-management service | Integration was planned for the first half of 2020. |
| Tenable Lumin | Integration was planned for the first half of 2020. |
What the acquisition meant for buyers and security teams
For organizations evaluating the deal’s significance, the distinction is between OT-specific visibility and enterprise-wide risk management. Indegy contributed insight and management capabilities for industrial assets; Tenable positioned its broader platform as a way to bring those OT findings into the same risk and remediation picture as IT vulnerabilities.
Quick Recap
- For plant-operations teams: OT device inventory, configuration oversight, threat detection, and device-aware analysis address operational environments directly.
- For security leaders: Shared visibility and risk prioritization were intended to reduce the divide between IT and OT security work.
- For deployment planning: The announcement distinguished the then-available Tenable.sc integration from integrations planned for Tenable.io and Lumin. The stated schedule alone does not establish their present status.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
