Leadership at Mantengu Mining is poised for a reset following the resignation of Chief Executive Officer (CEO) Mike Miller. He stepped down at the end of February after a bruising public conflict with the Johannesburg Stock Exchange. The company confirmed on February 20, 2026, that Miller will vacate his positions as CEO and Executive Director effective February 28, 2026.
“Mike played an integral role in the strategic leadership of the Company and he diligently fulfilled his duties with the highest level of integrity, expertise and commitment. Mike has taken the difficult decision to resign in order to allow him to spend more time with his young family. Mantengu’s operational ramp-up to steady state also demanded increased executive time on site and it would have been difficult for Mike to commit this time,” said Mantengu.
The departure follows a turbulent 2025 in which Miller and the company alleged that JSE directors and other parties manipulated Mantengu’s share price. The miner said it had alerted the JSE to its concerns but claimed the exchange instead investigated Mantengu for alleged breaches of Listings Requirements. The JSE denied the allegations, stating it was not a party to or “complicit” in any form of illegal or unlawful activity and that Mantengu’s claims were “false and rejected”. A similar complaint lodged with the Financial Sector Conduct Authority found no evidence of wrongdoing.
In November 2025, the Johannesburg High Court ruled that Mantengu and Miller had to cease publishing their allegations against the exchange. With Miller’s exit, current Chief Financial Officer (CFO) and Deputy CEO Magen Naidoo will step into the top job from 1 March 2026. Mantengu described Naidoo, a qualified Chartered Accountant with more than 25 years’ experience, as well positioned for continuity, noting his previous 17-year tenure as an audit partner at Deloitte, where he served major listed clients including Anglo American.
“Naidoo has been actively involved in operations as Deputy CEO over the past few months, as well as the company’s various acquisitions and the group strategy over the past few years. This will enable him to transition to the role of Chief Executive Officer seamlessly,” noted Mantengu. As Naidoo takes over, Mantengu Director Langton Mpofu will assume the role of CFO, marking a broader leadership reshuffle at a time when the company is seeking operational stability after a year defined as much by courtroom battles as by mining output.
