The Singapore Exchange Regulation (SGX RegCo) has issued a query to Catalist-listed OIO Holdings on July 2 after shares in the mechanical and electrical company rose 31.3% to 31.5 cents from its last-closed price of 24 cents.
In its filing on SGX, SGX RegCo have asked the company if it was aware of any information that may have triggered the spike. It has also asked OIO to confirm its compliance with the listing rules.

