A regulatory filing showed his investment vehicle Ervington Investments had on June 30 completed a transaction, which resulted in him now owning around 34.4mln shares , or 24.04%.
The firm is at the forefront of developing gas-to-liquid (GTL) technology, which convert natural gas or biomass into diesel, jet fuel, waxes and other oils.
In May, it reported a narrowing of the pre-tax loss to £21.1mln, down from a loss of £23.3million and an upswing in revenues.
It said there were projects in the pipeline and that there was good progress on Envia Energy’s project in Oklahoma, USA with Velocys reactors already completed and mechanical completion expected by mid-2016.
Velocys shares added 5.45% to 29p.