[13] Following the merger with Nikanor in 2008, Katanga sold Dikuluwe and Mashamba West to Gécamines for $825 million.

[15] In January 2018, a dike broke at Kamoto mine, causing a sodium hydrosulphide spill that damaged crops and killed fish.

[15] The release of the Paradise Papers in 2017 revealed details of the 2008-2009 negotiations between Katanga and the Congolese state-owned Gécamines.

Along with an indirect personal stake in the Katanga project, Gertler had a close personal relationship with the Congolese president's top advisor Augustin Katumba Mwanke [fr; de], and allegedly passed along millions in bribes on behalf of Och Ziff Capital Management.

[16][17] Canada required a $20 million fine from the company in 2019 due to its unclear relationship with the Congolese authorities.