An article in the Oct. 15 issue incorrectly reported the timing of Nipcos purchase of a majority share in the former Mobil Oil Nigeria Plc. Nipco agreed in 2016 to buy ExxonMobils 60 percent stake in the company, which was later renamed 11 PLC, but did not complete that deal until April 2017. Later in 2017 Nipco increased its stake to 70 percent through a stock buyback.