The company has submitted a $5 billion IPO application to Nigeria's Securities and Exchange Commission, although the final size of the offering has not been determined, according to Reuters. The refinery does not currently plan a foreign listing for at least three years.

The proposed transaction would represent a significant development for Nigeria's capital market. A retail-focused offering could broaden participation in a major industrial asset while giving the refinery access to additional capital to support expansion.

The company is targeting an increase in refining capacity to 1.4 million barrels per day within three years, with the IPO and debt expected to contribute to the financing. The refinery currently supplies most of Nigeria's fuel requirements and has increased its position in international markets, including becoming Europe's largest jet-fuel supplier in June and July, according to Reuters.

The planned listing follows a $2.5 billion private placement in July that valued the refinery at $40 billion. The transaction, led by Africa Finance Corporation, was reportedly oversubscribed 3.7 times.

For Nigeria, the proposed IPO carries significance beyond fundraising. Greater domestic ownership of a strategic energy asset could deepen the relationship between industrial development and local capital markets, while a successful listing could provide a reference point for other large Nigerian infrastructure and industrial companies considering public markets.

The proposal also comes as the refinery benefits from changes in global energy flows. Geopolitical disruption has increased demand for refined products from alternative suppliers, strengthening the commercial relevance of the facility.

The principal uncertainty is valuation and execution. The final IPO size, pricing, investor demand and regulatory process will determine how much capital the transaction ultimately raises.

What to watch: SEC approval, the final offer size, valuation, retail investor participation, listing timetable and the allocation of proceeds towards the refinery's planned capacity expansion will determine the transaction's significance for Nigeria's capital markets.