Shares of BigBear.ai Holdings (NYSE: BBAI) surged 14.71% in after-hours trading on Monday following the company's third-quarter 2025 earnings release and the announcement of a significant acquisition. The AI-powered decision intelligence solutions provider delivered better-than-expected quarterly results and revealed plans to acquire Ask Sage, a generative AI platform.

For the third quarter, BigBear.ai reported revenue of $33.1 million, representing a 20% decrease from the same period last year. Despite the revenue decline, the company posted a narrower loss than anticipated, with earnings per share (EPS) of -$0.03, surpassing analyst estimates. The improved bottom line performance likely contributed to the positive market reaction.

The most significant driver of the stock's after-hours rally appears to be BigBear.ai's announcement of a definitive agreement to acquire Ask Sage for $250 million. Ask Sage is described as a fast-growing generative AI platform specifically built for defense and national security agencies. The acquisition is expected to bring approximately $25 million in annual recurring revenues for 2025, potentially boosting BigBear.ai's growth prospects. Additionally, the company maintained its full-year 2025 revenue projection between $125 million and $140 million, signaling confidence in its near-term outlook despite recent challenges.