(May 4, 2018, 1:48 PM EDT) -- WASHINGTON, D.C. — Two energy companies and the Republic of Ghana on May 1 filed an appeal and cross-appeal with the D.C. Circuit U.S. Court of Appeals in relation to a recent district court ruling in which a judge confirmed a $11.75 million award issued by the Permanent Court of Arbitration (PCA) (Balkan Energy Limited, et al. v. Ghana, 18-7061, D.C. Cir.)....