HGH Holdings. HGH Holdings Ltd. was listed on the Catalist Board of the Singapore Exchange Securities Trading Limited in 2005 with its primary business in the manufacturing and supply of high-precision cold forged loudspeaker parts. In 2017, the Group underwent a transformation as it ventured into new business segments and subsequently divested its initial business. The divestment was completed in January 2018 and the Group now focuses on the new businesses: Leasing and Service Income, Supply and Manufacturing of Ready-Mix Concrete, Manufacturing Precast Concrete Products, Underground Cable Installation and Road Reinstatement Services.