Singapore Technologies Engineering Ltd (ST Engineering) shares ended Christmas Eve trading (Dec 24, 2025) as the largest decliner on the Straits Times Index, slipping 1.3% (S$0.11) to S$8.35 in a shorter session ahead of the holiday break. ^[1]

That single-day move doesn’t change the bigger story investors have been trading all year: ST Engineering is no longer “just” a domestic defence-and-engineering stalwart. It’s also a global operator in commercial aerospace maintenance, urban mobility systems and digital solutions—paired with a backlog that analysts repeatedly point to as a visibility anchor.

Below is what matters for the stock as of Dec 24, 2025: the day’s market context, the latest company catalysts, and where forecasts…