Shares of Amentum Holdings, Inc. (AMTM) took a sharp dive, plummeting 7.90% in Wednesday's pre-market trading session. The significant drop came on the heels of the company's release of its second-quarter fiscal year 2025 financial results and an update to its full-year guidance.

The advanced engineering and technology firm reported second-quarter revenues of $3.5 billion, marking a modest 1% growth on a pro forma basis. Net income for the quarter stood at $4 million, with adjusted EBITDA reaching $268 million. Amentum's diluted earnings per share came in at $0.02, while adjusted diluted EPS was $0.53.

Despite reaffirming the mid-points of its prior guidance, Amentum slightly narrowed its fiscal year 2025 outlook. The company now projects revenues between $13,850 million and $14,150 million, a tighter range compared to the previous $13,800 million to $14,200 million. The adjusted diluted EPS guidance remained unchanged at $2.00 to $2.20. Investors' negative reaction to the quarterly results and the narrowed revenue guidance appears to be the primary driver behind the stock's significant pre-market decline.