The Treasury Department maintains that Deripaska will remain blacklisted as part of sanctions that targeted tycoons close to the Kremlin, and that the companies have committed to diminish Deripaska's ownership and sever his control.
"These entities are undergoing significant restructuring and governance changes that sever Deripaska's control and significantly diminish his ownership," Mnuchin said in the statement.
House Intelligence Committee Chairman Adam Schiff, D-Calif., said he pressured Mnuchin on concerns that Deripaska and other Kremlin allies will continue to exercise influence over the companies.
Separately, on Wednesday, the House Judiciary Committee chairman, Jerry Nadler, D-N.Y., wrote a letter to Attorney General Matthew Whitaker demanding that he testify about his decision not to recuse himself from Mueller's inquiry into Russian meddling in the 2016 presidential elections.
Among the signatories: three former attorneys general, two former FBI directors and two former deputy FBI directors, six former deputy attorneys general and more than 70 former U.S. attorneys.