3 Angolan tycoons built Etu Energias into a $1 billion oil empire and just blocked Chevron's $260 million deal

In March 2026, Energean plc announced what its chief executive Mathios Rigas called a historic moment: a deal to acquire Chevron's interests in two Angolan offshore blocks for a base consideration of $260 million, with contingent payments of up to $250 million more through 2038. It was the British company's first venture into sub-Saharan Africa, a significant geographic expansion for a firm that had spent years building its gas portfolio in the Eastern Mediterranean while regional conflict repeatedly shut down its Israeli fields.

On Wednesday, Energean disclosed that the deal might not happen. Angola's Etu Energias, the country's largest fully private oil company, has notified Chevron that it intends to exercise pre-emption rights over the same assets. If the claim is valid and meets all required conditions, Etu can step directly into Energean's place, acquiring the Chevron stakes at the same price and on the same terms that Energean negotiated. The deal that Energean described as historic would simply go to someone else.

The people who would benefit are not newcomers to Angola's oil sector. They are its architects.

The three tycoons who built Angola's biggest private oil company

Etu Energias is controlled by three former executives of Sonangol, Angola's state oil company, who spent decades building their technical expertise inside one of Africa's most powerful petroleum institutions before channelling that knowledge into private enterprise.

Alberto Almeida de Sousa holds a 50 percent stake in Etu Energias. He served as the head of the geophysics division at Sonangol, a role that placed him at the technical heart of Angola's exploration and production decision-making for years. Geophysics is the discipline that determines where oil is likely to exist underground, which blocks are worth pursuing and which ones are not. The man who ran that division for Sonangol did not leave without taking his knowledge of the Angolan subsurface with him. Almeida de Sousa also served as the former chairman of the board at Somoil, the company's original name, before stepping into his current shareholder role following the corporate restructuring that accompanied the rebrand to Etu Energias.

Alexandre Salgado Costa and Ana da Conceição Nunes together hold a further 30 percent of the company. Both are former Sonangol colleagues of Almeida de Sousa, with professional backgrounds rooted in the same institutional environment. Together the three of them represent 80 percent of Etu Energias, giving them overwhelming control of a company that closed $1 billion in mergers and acquisitions transactions between 2022 and 2025 and has ambitions to reach 80,000 barrels per day by 2030. Eight other shareholders hold the remaining 20 percent. Their identities have not been publicly disclosed.

The company they control is now run day-to-day by Edson dos Santos, himself a former senior executive at Sonangol, whose appointment continued the pattern of filling Etu's leadership with people who understand Angola's oil sector from the inside out.

The company built on political proximity

Etu Energias was not always called Etu Energias. It was founded in 2000 under the name Somoil, short for Sociedade Petrolífera Angolana, by senior members of Angola's ruling MPLA party. The company's early years were defined by political proximity: it was widely associated with Manuel Vicente, the former chairman of Sonangol who became Angola's vice president, and with Joaquim David, a former minister of industry and oil engineer who had served as director general of Sonangol from 1989 to 1998 before founding the company. Those relationships gave Somoil access to blocks, licences and commercial opportunities that purely technical operators, without the political networks to navigate Angola's hydrocarbon governance structure, would not have been able to secure.

The company rebranded from Somoil to Etu Energias in April 2023. Etu means "we" or "us" in Bantu, a name that company leadership described as signalling a broader vision extending beyond crude oil into renewable and alternative energy. From a production base of just 4,000 barrels per day in 2020, Etu grew to approximately 25,000 barrels per day by 2024. It now operates offshore Block 2/05, which contains 18 oilfields with combined reserves exceeding 500 million barrels, and holds interests across multiple other offshore and onshore blocks in the Lower Congo Basin and the Kwanza Basin. Between 2022 and 2025, it closed approximately $1 billion in M&A transactions, acquiring stakes from TotalEnergies, Galp, Azule Energy and now attempting to acquire Chevron's interests as well.

The pre-emption right and what it means

In Angola's upstream oil sector, joint venture partners in a producing block hold the right of first refusal when one partner sells its interest to a third party. This pre-emption mechanism allows an existing partner to match any outside offer and acquire the stake on identical terms, rather than having an unknown new entrant introduced into the joint venture structure. The mechanism exists precisely to protect incumbent partners from having their commercial and operational environment disrupted by buyers they did not choose.

Etu Energias holds existing interests in both Block 14 and Block 14K, the two assets that Chevron agreed to sell to Energean. Chevron is selling a 31 percent operated interest in Block 14 and a 15.5 percent non-operated interest in Block 14K, assets that were collectively producing around 42,000 barrels per day when the deal was announced. Etu's position as a joint venture partner gives it the legal basis to trigger the pre-emption mechanism. By doing so, it is asserting the right to acquire Chevron's stakes before Energean can close, at the same $260 million base price and on the same terms.

The exercise of pre-emption rights is not automatic. To validly displace Energean as the buyer, Etu must meet the same technical and operational eligibility conditions Energean was required to satisfy. The critical requirement is that the acquiring company must demonstrate it operates at least one producing asset in waters deeper than 300 metres. Whether Etu currently meets that specific deepwater threshold is the pivotal question on which the validity of its claim will rest. Neither Etu nor Chevron has made any public statement on the matter.

The pre-emption exercise follows a successful use of the same mechanism earlier in 2026. In March, Etu displaced a BW Energy and Maurel and Prom consortium to acquire Azule Energy's stakes in the same two blocks, a 20 percent interest in Block 14 and a 10 percent interest in Block 14K, for a base value of $195 million. That transaction was financed by a $170 million facility provided by Shell Western Supply and Trading, alongside Chariot Limited. The fact that Etu has now moved against a second buyer for the same assets within three months suggests a deliberate strategy to consolidate control in the Lower Congo Basin rather than a one-off opportunistic move.

Energean confirmed the development on Wednesday, noting that the original sale and purchase agreement with Chevron remains in force while the validity of the pre-emption claim is assessed. The company said it would continue updating the market. The British firm had previously evaluated Moroccan assets before turning to Angola, which gives some context for the difficulty of finding new growth opportunities outside its Israeli gas portfolio in a geopolitical environment that has made its core producing region consistently unreliable.

The outcome will likely hinge on one technical question: can Etu Energias demonstrate that it operates a producing asset in deepwater exceeding 300 metres? If yes, three former Sonangol executives who turned their institutional knowledge of Angola's subsurface into the country's most aggressive indigenous oil company will have displaced two international buyers for the same assets in the same quarter, and confirmed that in Angola's oil sector, knowing where the oil is matters less than knowing who owns the rights to reach it.