Glencore Plc’s billionaire head of copper trading, Aristotelis Mistakidis, was among executives fined and banned from being a director by Canada after admitting that its Congolese copper and cobalt unit misstated how much metal it mined.

Mistakidis, who is retiring from Glencore at the end of this year, was hit with a $2.45 million fine and a four-year director ban in Ontario at a public hearing on Tuesday by Canada’s Ontario Securities Commission. Other Katanga Mining Ltd. directors including Liam Gallagher and its chief executive officer, Johnny Blizzard, were also sanctioned.

The punishment from the OSC is a response to false accounting from Katanga that saw it overstate how much it mined in the Democratic Republic of Congo in 2014. Glencore, which has come under intense pressure following a string of investigations into its dealings in Congo, owns 86 per cent of Katanga.

The OSC previously said that Katanga overstated its copper production by about 8,000 tons in 2014 after the Glencore directors on its board "participated in instructing management" to report output at a certain level. It also said the company had failed to disclose the risks posed by its reliance on its partner in Congo, Israeli billionaire Dan Gertler, who was placed under U.S. sanctions last year.

Glencore is set to have a greater involvement in Katanga, with the companies planning to enter into a management agreement early next year. That will allow operations to be managed more effectively, they both said.

Glencore is “disappointed by the conduct that has led to today’s settlement,” it said in a statement. The world’s biggest commodity trader, which is also facing a corruption probe by the U.S. Department of Justice, said it had taken remedial actions in response to the conduct.

Breakdown of penalties and bans:

• Gallagher: $950,000 penalty and six-year ban.
• Tim Henderson: $450,000 penalty and three-year ban.
• Blizzard: $400,000 penalty and two-year ban with minor exceptions, with the CEO also to resign within 30 days.
• Katanga’s former Chief Financial Officer Jacques Lubbe: $550,000 penalty and four-year ban. Matthew Colwill: $350,000 penalty and two-year ban.
• Jeffrey Best: $750,000 penalty and four-year ban.
• Katanga has paid a penalty of $28.5 million and costs of $1.5 million.

Katanga’s rose 1.8 per cent in Toronto, rebounding from earlier losses. Glencore fell 1.6 per cent in London.