Tullow shares crash 50% after Ghana wins $196.5M tax arbitration over insurance proceeds
Tullow Oil shares plunged as much as 52% intraday on Wednesday, September 30, 2026, after an ICC tribunal upheld Ghana's $196.5 million corporate income tax assessment on insurance proceeds received between 2016 and 2019 under Tullow's Business Interruption policy. Shares opened at 15.94 pence and dropped to 9.73 pence, reversing an 88% rally since March. The tribunal also ruled that 100% penalties on the tax amount fall outside contractual protections in Tullow's petroleum agreements.
This matters because Ghana is consolidating revenue from key natural resources amid broader oversight efforts—including new gold refining policies since September 2026—to boost foreign-exchange reserves. Tullow's high-value Ghana assets (Jubilee and TEN fields) remain central to its strategy after exiting Gabon, Equatorial Guinea, Kenya and Côte d’Ivoire, making this outcome significant for regional energy investments and tax dispute precedents across West Africa.
Despite reporting first-half 2026 revenue of $496 million (up from $411 million) and gross profit of $276 million (up from $165 million), Tullow recorded an after-tax loss of $101 million, widening from $80 million in H1 2025. Ghana plans to implement the award while preserving Tullow's operational capacity. For Nigeria's energy sector: monitor if similar tax disputes emerge in local petroleum agreements as governments seek to maximize resource revenue.