Cybersecurity Add-on Acquisitions in 2026

Markon, a Sterling Investment Partners portfolio company, has acquired Millennium Corporation to expand full‑spectrum cyber capabilities across defense, intelligence, and federal civilian markets. The deal combines Markon’s enterprise delivery and program execution strengths with Millennium’s adversarial threat emulation, cyber operations, testing, training, and software capabilities as an add‑on to Markon’s platform.

Entech, a Prospect Partners–backed Florida managed technology and cybersecurity platform, has acquired Coral Springs–based C2 Computer Services, Inc., a managed cybersecurity and IT services provider serving South Florida. The deal deepens Entech’s East Coast presence, broadens its cybersecurity capabilities, and brings additional local support resources to clients across Florida.

Integrity360 has acquired Calgary-based cybersecurity services provider Advantus360 to establish the group’s first North American hub. The deal — terms undisclosed — gives Integrity360 an operating base in Canada and will be used to develop a Calgary Security Operations Centre and expand the group’s managed and professional cyber services across Canada and the US.

ThreatModeler has acquired IriusRisk to combine two enterprise threat-modeling platforms, broaden global scale, and accelerate product development. The combined business — majority owned by Invictus Growth Partners, with Paladin Capital Group remaining a shareholder — aims to create the industry’s largest proprietary threat-model dataset and deepen secure-by-design support for security and development teams.