Singapore shares closed marginally higher on Monday, despite regional markets posting mixed results as regional semiconductor and technology stocks lost momentum.

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 5,233.21 and 5,261.37 throughout the day. It ended the session at 5,259.81, up 15.52 points or 0.3% compared to Friday's close.

In economic news, Singapore's total retail sales rose 3% year over year to SG$4.5 billion in May, softer than the 5.4% increase the prior month, according to data from the Statistics Department.

Shares of Metech International (SGX:V3M) sank nearly 13% at the close as it received a listing and quotation notice from the SGX-ST for 100 million placement shares at SG$0.040 per share.

Aoxin Q & M Dental's (SGX:1D4) shares closed over 2% lower as its former chief executive officer, Shao Yongxi, is now facing further investigation related to obtaining funds from whistleblowers for his own personal use.

Meanwhile, shares of Green Build Technology (SGX:Y06) plunged over 19% at the close as the company delayed a placement exercise due to a subscriber's inability to have the financial means to finalize the share subscription.