Nigerian tycoon Tony Elumelu named Seplat Energy chairman

Tony Elumelu will become chairman of Seplat Energy Plc from January 2027, the Nigerian Exchange-listed oil and gas producer announced Tuesday, while simultaneously appointing veteran industry executive Effiong Okon as its new chief executive officer effective August 1, completing a sweeping leadership overhaul driven by the arrival of Heirs Energies as the company's dominant shareholder.

The dual announcement, filed with the Nigerian Exchange Limited, marks the most consequential governance transition in Seplat's 16-year history and formally installs Elumelu at the top of a company whose share price has risen 80 percent since his Heirs Energies vehicle acquired a 20.07 percent stake for approximately $500 million in December 2025.

Elumelu will succeed Udoma Udo Udoma, who currently occupies the chairmanship. The transition follows a calculated sequence: Heirs Energies completed the acquisition of 120.4 million ordinary shares previously held by French firm Maurel and Prom in December 2025, making it Seplat's single largest shareholder. Elumelu joined the Seplat board as a non-executive director in January 2026. The chairmanship announced Tuesday is the final step in a consolidation that began with that December transaction and has taken six months to complete.

The $500 million Heirs Energies investment, financed by Afreximbank and Africa Finance Corporation, has already generated a significant paper gain. By April 14, 2026, when Seplat became the first company in the 65-year history of the Nigerian Exchange to cross the N10,000 per share barrier, the stake had appreciated to over $800 million, a paper gain of approximately $300 million in under 120 days. Market analysts attributed the rally directly to what they called the "Elumelu effect" — the investor's documented track record of transforming the companies he leads, most visibly at United Bank for Africa and Transcorp.

Okon, who takes over as CEO from August 1, brings more than 35 years of oil and gas industry experience to the role. He joined Seplat in 2018 and has held progressively senior positions, including operations director, new energy director and managing director of ANOH Gas Processing Company, the midstream joint venture that achieved first gas in January 2026. Seplat credited him with playing a pivotal role in delivering the ANOH project, which is expected to significantly strengthen Nigeria's domestic gas supply.

"Effiong Okon's operational expertise, deep understanding of the business and experience across upstream and midstream operations position him to lead the company through its next phase of expansion," Seplat said in its exchange filing.

The appointment ends a period of transition in the CEO role. Okon will inherit a company with 2P reserves of 1.043 billion barrels of oil equivalent as of December 2024 and working interest production of 135,600 barrels of oil equivalent per day as of October 2025, dual-listed on the Nigerian Exchange and the London Stock Exchange, and now backed by Africa's most prominent indigenous energy investor as its anchor shareholder.

Elumelu's own track record in boardroom transformation is the foundation of the market's confidence in the Seplat transition. He rescued UBA from near-collapse when he led its 2005 merger with Standard Trust Bank and built it into a pan-African institution operating in 20 African countries and globally. At Transcorp, he engineered a similar turnaround, transforming a dormant conglomerate into a profit-generating power and hospitality business. His Africapitalism philosophy — the argument that private sector investment is the most effective engine of African development — has shaped how he has deployed capital across every major investment he has made.

The Seplat chairmanship represents his most direct governance role in an upstream energy company. Heirs Energies, which he chairs, operates OML 17 as its flagship asset and has more than doubled production to over 50,000 barrels per day since assuming operatorship in 2021. His familiarity with upstream operations, combined with Seplat's existing 1 billion-barrel reserve base, gives the combination a platform that analysts say few indigenous African energy groups can match.

Seplat's current major shareholders following the Heirs Energies acquisition are Heirs Energies with 20.07 percent, Petrolin Group with 13.77 percent, Sustainable Capital with 9.77 percent, Professional Support with 8.5 percent and Allan Gray Investment Management with 5.57 percent.

The leadership changes take effect at a moment when Seplat is deepening its gas strategy and positioning itself as a central player in Nigeria's energy transition. The ANOH gas project, now producing, is the clearest expression of that gas-led ambition. Elumelu and Okon will now execute it together.