On Tuesday, Feb 11, through his ISA, he bought 2 million Ortac shares at 0.235p each, it said in a brief statement.
Shares are trading today up 10.64% to 0.26p each.
On February 3, the company said Andiamo Exploration, with which it recently struck a strategic tie-up, has unveiled a deal to expand exploration in Eritrea.
Andiamo has granted Environminerals East Africa (EEA) an option to earn a 50% interest and subsequently a 75% interest in its rights over 87 square kilometres (sq. km) in the northern part of the Haykota licence, which spans a total of 252 sq. km.
This represents 35% of the total licence area held by Andiamo.