CACI International has agreed to acquire ARKA Group L.P. from funds managed by Blackstone Tactical Opportunities in an all-cash transaction valued at $2.6 billion.
According to CACI, the acquisition strengthens the company’s space strategy and expands its ability to support national security missions. ARKA supports national security customers through its space-based sensor portfolio and ground-based software processing, accelerating the delivery of actionable intelligence to the warfighter.

“The acquisition of ARKA represents a significant step forward in our space strategy,” said John Mengucci, CACI president and CEO. “They bring deep experience and proven performance as a best-in-class provider of national security space and defense capabilities, which has been enhanced by Blackstone’s constructive stewardship of the business during their ownership. With a shared heritage spanning more than sixty years, CACI and ARKA address complex mission requirements and deliver future-ready solutions at the speed and scale required to expand the limits of national security.”
“For our shareholders, the acquisition of ARKA positions CACI to capture significant future opportunities in the space domain across Intelligence Community, U.S. Space Force, and other Department of War customers,” Mengucci continued. “The combination enhances our ability to drive long-term growth in free cash flow and generate additional shareholder value.”
As a result of the transaction, CACI expects to realize a tax benefit with a present value of $225 million. The company anticipates the transaction to close in the third quarter of fiscal year 2026, subject to regulatory approvals and customary closing conditions.
Wells Fargo acted as exclusive financial advisor to CACI and provided committed financing. Gibson Dunn served as legal advisor to CACI. J.P. Morgan Securities LLC and Evercore served as financial advisors to ARKA. Simpson Thacher & Bartlett LLP served as legal advisor to ARKA.