Glencore announced on Monday that it had nominated three new directors to the board of its Katanga copper mining operations following the resignation of a trio of previous executives.
The resignations from Katanga Mining Limited - the Democratic Republic of Congo operation that produces copper and cobalt - came after "material weaknesses" were identified in the company's internal controls over financial reporting.
Katanga, which is 86%-owned by Glencore, also announced on Monday it had completed an internal review of its historic accounting practices and the restatement of its financial statements.
The review found that Katanga had mis-stated copper production and the value of its inventories.
The company appointed three new directors to replace the resignees, including Steven Kalmin, Glencore's chief financial officer.
These new directors will "work with the independent directors of Katanga to implement the required remediation measures to strengthen Katanga's corporate governance, compliance and control processes", the company said in a statement.
It added: "Glencore will also be implementing various structural and control changes across its copper department in order to enhance and strengthen its financial processes and procedures."
Glencore said that any adjustments arising from the review would not have a material adverse effect on the financial position of the company.
Shares in Glencore were down 0.47% to 351.8p after two hours of trade on the London Stock Exchange.