RESTON, Va.–(BUSINESS WIRE)– #LimitlessPotential–CACI International Inc (NYSE: CACI) announced today that it has entered into a definitive agreement to acquire ARKA Group L.P. (ARKA) from funds managed by Blackstone Tactical Opportunities (Blackstone) in an all-cash transaction for $2.6 billion. Aligned with CACI’s commitment to delivering advanced technology for national security customers, ARKA supports national security missions through its space-based sensor portfolio and ground-based software processing, acc