 DALLAS, May 18, 2021 PRNewswire -- Simmons Bank, as Trustee of the Permian Basin Royalty Trust NYSE: PBT Permian today declared a cash distribution to the holders of its units of beneficial interest of 0.021243 per unit, payable on June 14, 2021, to unit holders of record on May 28, 2021. This months distribution increased slightly from the previous month as the result of increased prices for both oil and gas offset by decreased production on the Waddell Properties due to the end of the February and weather-related outage. 