WASHINGTON — The Treasury Department allowed the influential Russian oligarch Oleg V. Deripaska to satisfy the terms of his divorce by transferring tens of millions of dollars in stock to benefit his children as part of a deal to lift United States sanctions on his corporate empire, according to the Trump administration and an interview with Mr. Deripaska.

The deal, announced by the Trump administration in December without publicly disclosing its details, included a clause providing for the completion of a transfer of 10.5 million shares of Mr. Deripaska’s main holding company, EN+, to a trust fund for the two teenage children he had with his former wife, Polina Yumasheva.

The couple divorced last year, and their settlement, which called for him to provide funds for their children, was finalized before Mr. Deripaska and his companies were sanctioned in April 2018, according to representatives of the Treasury Department, Mr. Deripaska and EN+.

The transfer has drawn the ire of Senator Ron Wyden, Democrat of Oregon, who is a member of the Senate Finance Committee, which has jurisdiction over the Treasury Department. He said in a letter sent late last month to Steven Mnuchin, the Treasury secretary, that the transfer of the EN+ shares — which had a value of more than $78 million at the close of business on Monday — “constitutes a clear benefit to Deripaska and his children,” and conflicts with Treasury Department claims that neither would benefit from the sanctions relief deal.