A non-governmental organisation has taken legal action against Nigerian National Petroleum Company Limited’s (NNPCL) Chief Financial Officer, Adedapo Segun, over a controversial N140 billion ($325 million) transaction linked to the acquisition of OVH Energy.

The Incorporated Trustees of Legal Defence Against Injustice Initiative filed the suit at the Abuja High Court, asking the Court to order Segun to return the funds to the Federal Government’s treasury. The group also wants the Economic and Financial Crimes Commission (EFCC) and the Attorney-General of the Federation (AGF) to prosecute him for his role in the OVH deal as well as activities tied to the rehabilitation of the Port Harcourt and Warri refineries.

Court filings show that the case, marked CV/3104/2025, was instituted as a public interest matter. The plaintiff is demanding not only a refund but also a perpetual injunction barring the official from holding public office.

In its affidavit, the group argued that despite EFCC’s recent recovery of funds from contractors and some NNPCL officials, no direct charges had been brought against Segun, making judicial intervention necessary.

The disputed funds relate to NNPCL’s 2022 acquisition of OVH Energy Marketing, which operated Oando-branded service stations across Nigeria. The takeover added 380 filling stations, several depots, LPG plants, lube blending facilities, and a large reception jetty to NNPCL’s retail and supply portfolio. At the time, the deal was presented as a major step in strengthening the company’s downstream operations and improving nationwide product distribution.

The case now places additional scrutiny on one of NNPCL’s biggest acquisitions since it became a limited liability company, raising fresh questions over accountability and transparency in the nation’s oil sector.