CACI International completes $2.6B acquisition of Arka Group

Reston-based Fortune 500 government contractor CACI International announced Monday that it has completed its $2.6 billion acquisition of Danbury, Connecticut-based aerospace and defense contractor Arka Group.

CACI previously announced in December 2025 it had entered into an agreement to acquire Arka. Through the transaction, the Reston company has gained more than 1,100 Arka employees, including about 315 software engineers. Founded in 2008, Arka provides space and defense technology for government agencies and the intelligence community.

“Arka purposefully accelerates our space market strategy while adding technologies that strengthen and expand our position in this rapidly growing domain, which is traditionally defined by high technical barriers to entry,” CACI President and CEO John Mengucci said in a statement.

CACI said the purchase will enable it to deliver a broader range of capabilities to support national security missions. Arka’s products and services include remote sensing payloads, agentic artificial intelligence software and laser-guided threat detection systems. Arka’s space-based sensors expand CACI’s portfolio of sensors across the land, sea and air domains, according to CACI.

“As the threat environment grows more complex, this acquisition advances our long-term vision to deliver integrated, mission-critical space and ground capabilities that strengthen national security and support the evolving priorities of the intelligence community, the U.S. Space Force and the Department of War,” Mengucci continued in his statement.

CACI acquired Arka from funds managed by Blackstone Tactical Opportunities. Wells Fargo was CACI’s exclusive financial adviser, while Gibson Dunn acted as legal adviser for CACI. J.P. Morgan Securities and Evercore acted as financial advisers to Arka, while Simpson Thacher & Bartlett acted as its legal adviser.

Founded in 1962, CACI serves intelligence and defense agencies. It has more than 27,000 employees and reported $8.6 billion in revenue for fiscal 2025.