Exhibit 99.1 BigBear.ai Announces First Quarter 2026 Results, Increases Backlog Including More Than $60 million in National Security Contracts, and Affirms Revenue Guidance McLean, VA– May 5, 2026 – BigBear.ai Holdings, Inc. (NYSE: BBAI) ("BigBear.ai" or the "Company"), a specialized defense & security technology company providing mission-ready AI, today announced financial results for the first quarter of 2026 and issued an investor presentation that has been posted to the Investor Relations section of the ...