Inspired Energy's revenues rose by 56% to £10.16m in the six months to the end of June.
Adjusted EBITDA increased by 52% to £3.75m and adjusted profit before tax rose by 44% to £3.31m.
The procurement corporate order nook, which provides strong visibility of revenues and is a consistent guide to the future performance of the Corporate Division, has increased by 69% to £25.7m (H1 2015: £15.2m).
Chief executive Janet Thornton said: "Once again, I am delighted by the strong performance of the Group in the period, delivering record growth on all fronts, as we continue to deliver value-added services to our customers.
"The focus of the six months to 30 June 2016 was on the integration and relocation of the acquired businesses of WPUK and STC which have been achieved on target and within budget. In addition, the underlying businesses have continued to perform to plan, with sales opportunities created by the acquisitions already gaining traction.
"The record results are again testament to the commitment and expertise of the group's team. The group continues to deliver strong organic growth and the Corporate Division is now firmly established as a leading energy consultant to UK Corporates, offering a breadth of innovative and cost effective solutions to a wide range of clients and sectors, backed up by proactive advice and assurance throughout the life of a contract.
"This combination of skills, dedication, innovation and expertise allows the Group to maintain its outstanding retention rates in excess of 85%, which I am pleased to report we are also achieving in the acquired books of WPUK and STC.
"The SME division also continues to contribute strong revenue, profit and cash to the Group, with minimal increase in headcount and I am pleased with the progress that this division is continuing to make.
"The momentum built in the last two years continues unabated with the second half of the year starting strongly. Since 30 June 2016, a major retail focussed corporate customer of STC, having engaged with Inspired's Risk Managed Team, has entered into a contract that is now the largest signed by the Group to date.
"We look forward to delivering another set of strong results for the year ended 31 December 2016. With the continued growth in the Corporate Order Book the Board is confident that the Group is well positioned for the medium term."