After becoming commerce secretary, Wilbur L. Ross Jr. retained investments in a shipping firm he once controlled that has significant business ties to a Russian oligarch subject to American sanctions and President Vladimir V. Putin’s son-in-law, according to newly disclosed documents.
The shipper, Navigator Holdings, earns millions of dollars a year transporting gas for one of its top clients, a giant Russian energy company called Sibur, whose owners include the oligarch and Mr. Putin’s family member. Despite selling off numerous other holdings to join the Trump administration and spearhead its “America first” trade policy, Mr. Ross kept an investment in