Simpson is representing ARKA Group L.P. (“ARKA”) in connection with its entry into a definitive agreement to be acquired by CACI International Inc. in an all-cash transaction for $2.6 billion from funds managed by Blackstone Tactical Opportunities.
Headquartered in Danbury, Connecticut, ARKA is a fully integrated mission partner providing cutting-edge solutions with an unrivaled reputation for excellence to U.S. and international mission partners. ARKA’s legacy dates back to the earliest efforts in the United States’ space program, and today its advanced capabilities support all mission domains. ARKA addresses a broad range of customer needs, including state-of-the-art optical technologies, information processing and analytics, and trusted communication solutions that support the warfighter and the nation’s decision makers.
The transaction is subject to regulatory approvals and customary closing conditions and is expected to close in the first quarter of 2026.
The Simpson Thacher team includes Anthony Vernace, Mark Viera, Iliana Karaoglan, Haley O’Connor, Cathy Ye, Jacob Kornman, Kayla Sinoimeri and Caitlin Cheeseboro (M&A); Sophie Staples, Jonathan Goldstein, Matthew Lester, Ruoxi Zhang and Roberto Arza (Tax); Greg Grogan, Caitlin Lucey, Josh Stephens and Shivani Motamarri (ECEB); Brian Gluck and Adam Moss (Credit); Lori Lesser, Dewey Kang and Isabella Gonzalez (IP); Dennis Loiacono (Real Estate); Peter Guryan, Etienne Renaudeau, Jamie Logie, Luke Cowdell and Alexandra Allum-Pearce (Antitrust); Josh Bonnie, William Golden, Katharine L. Thompson, Aarthy S. Thamodaran, Kelsey Henderson, Noor Irshaidat and Nate Yang (Capital Markets); and Javier Rivera-Alvarado, Avalee Hagerty and John A. Carter (Funds).