On February 11, 2021, PrimeEnergy Resources Corporation and its subsidiaries, Prime Operating Company, Eastern Oil Well Services Company, and EOWS Midland Company as the debtors and BBVA USA (as lender, Administrative Agent and Issuing Bank), Citbank, N.A. and Fifth Third, National Association, as lenders (collectively, the “Lenders”) entered into the Sixth Amendment to the Third Amended and Restated Credit Agreement (the “Credit Agreement”). Pursuant to the terms and conditions of the Credit Agreement as amended, the Company has a revolving line of credit and letter of credit facility of up to $300 million subject to a borrowing base that is determined semi-annually by the lenders based upon the Company’s financial statements and the estimated value of the Company’s oil and gas properties, in accordance with the Lenders’ customary practices for oil and gas loans. The Company’s borrowing base is $40 million. The Company and the lenders may request an additional redetermination of the borrowing base once during each semi-annual period. Borrowings under the Credit Agreement will bear interest at a base rate plus an applicable margin ranging from 2.00% to 3.00% or at the Company’s option, at LIBOR plus an applicable margin ranging from 3.00% to 4.00%. The Credit Agreement will mature on February 11, 2023. Substantially all of the Company’s oil and gas properties are pledged as security for the Credit Agreement. Borrowings under the Credit Agreement will be used for general corporate purposes.