Arrivals of unwrought copper and products stood at 510,402 tonnes last month, higher than 410,541 tonnes in October but still down 9.1% from a year earlier.
Copper prices have registered all-time highs this year, supported by expectations of solid economic recovery and rising demand for the metal needed in electronics and construction.
The US imposed sanctions on Dan Gertler in 2017, accusing him of leveraging his friendship with former Congo President Joseph Kabila to secure lucrative mining deals.