Union Gas had, on April 27, applied to transfer its listing on the SGX-ST to the Mainboard from the Catalist board.
No reasons were given for the reason behind the transfer.
The submission to SGX-ST for the proposed transfer is currently pending its approval.
The company, on May 31, drew a query from the Singapore Exchange Regulation (SGX RegCo) after its share price jumped 6.3% to 93 cents in the day.
See: Union Gas Holdings draws SGX query after share price leap
Shares in Union Gas closed 7.5 cents higher or 8.6% up at 95 cents on May 31.