Singapore's shares surged on Wednesday, mirroring gains in the regional markets, despite an overnight dip in the US stock markets with investors seeking clarity on US President Donald Trump's tariff plans.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 3,909.82 and 3,932.07 throughout the day. It ended the session at 3,917.06, up 18.66 points or 0.48% compared to Wednesday's close.

In company news, shares, of DISA (SGX:532) surged over 100%, as its stepdown subsidiary, Digital Life Line's unit DiSa Digital Safety, received an approval for the clinical deployment of its Automated Visual Acuity Test device at a hospital ophthalmology clinic in Hong Kong.

DBS Group (SGX:D05) was up nearly 1% at the close after it appointed TAN Su Shan as the group chief executive officer, effective March 28.

Meanwhile, shares of Singapore Technologies (SGX:S63) were up over 2% after the company revealed that its commercial aerospace business is set to undertake a capacity transition plan for its airframe Maintenance, Repair and Overhaul (MRO) operations.

STI rose 0.5%; CSC rose 11%; Centurion rose 7%; Yoma Strategic rose 5.3%; ST Engineering, Nio rose 2%; UOB, DBS rose 1%.