Shares of Celestica (CLS) surged 5.89% in after-hours trading on Monday, extending a robust pre-earnings rally, as the company reported its fiscal second-quarter results after the market close.

The upward move was fueled by robust quarterly results that likely exceeded market expectations, which had been set high given the company’s exposure to AI-related demand. Institutional analysts had forecast revenue of approximately $4.366 billion, a 63.12% year-over-year jump, and adjusted earnings per share of $2.30, an 85.31% increase. The Connectivity and Cloud Solutions (CCS) segment, a key driver of the company's growth, remained in sharp focus as market participants awaited updates on AI order execution and delivery momentum.

Bullish sentiment had been building throughout the day, with the stock already up more than 5% in the regular session and options activity pointing to outsized post-earnings swings. The after-hours surge confirms that investors were rewarded for their optimism, as Celestica continues to capitalize on accelerating demand in the AI infrastructure space.