Sintana Energy Inc. has quietly built one of Namibia’s most diverse exploration portfolios, covering five offshore licences and one onshore block.
The Toronto-listed company, trading on the TSX Venture Exchange under the ticker SEI, holds indirect positions in some of the most prospective acreage in the Orange, Walvis and Waterberg basins.
The structure behind that footprint is unconventional. Sintana is not an operator; it holds minority stakes in Namibian partners that in turn own free-carried interests in government-approved exploration licences.
The model enables the company to gain broad exposure to frontier oil discoveries without incurring the high costs associated with deep-water drilling.
“Our strategy is to build a portfolio of high-quality carried interests with top-tier operators,” President Robert Bose has said repeatedly. “It’s asymmetric exposure to success.”
Sintana’s Namibian entry point was its 2022 acquisition of a 49% stake in Custos Energy (Pty) Ltd, a local company owned by businessman Knowledge Katti. Custos has long been aligned with the Ministry of Mines and Energy’s goal of ensuring local participation in strategic petroleum licences.
Through Custos, Sintana indirectly holds equity in several Orange Basin blocks now regarded as global exploration hotspots.
The flagship is Petroleum Exploration Licence (PEL) 83, operated by Portugal’s Galp Energia E&P. Under the licence terms reissued in 2018, Galp holds 80%, while NAMCOR and Custos each hold 10% participating interests. Both Namibian partners are free-carried through the exploration phase under the country’s local-content framework. Sintana’s 49% stake in Custos translates to an adequate 4.9% indirect exposure to PEL 83.
PEL 83 became a headline asset in early 2024 after Galp announced the Mopane-1X and Mopane-2X wells had encountered significant oil-bearing reservoirs. Flow tests later achieved rates of around 14,000 barrels per day, confirming commercial-scale deliverability. Galp has since estimated more than 10 billion barrels of hydrocarbons in place, although recoverable volumes are still being evaluated.
The discoveries, located in the same deep-water trend as TotalEnergies’ Venus and Shell’s Graff fields, have propelled Namibia to the forefront of African exploration. For Sintana, a small indirect share of such a resource base offers potentially transformational leverage.
“The Mopane discovery validates the Orange Basin model we backed early,” Bose said following Galp’s February 2025 Mopane-3X appraisal success. Galp has now entered a multi-well appraisal programme expected to run through 2026, fully funding all costs for Custos and Namcor until commercial declaration.
Custos also holds 15% of PEL 87, a 10,970 km² tract of deep water immediately north of PEL 83.
Operator Pancontinental Orange (Pty) Ltd retains 75%, with Namcor at 10%. Through Custos, Sintana’s compelling interest is about 7.35%.
Between 2023 and 2024, Australian major Woodside Energy funded a 6,593 km² 3D seismic survey over the block under an option deed.
Although Woodside chose not to proceed with a farm-in in March 2025, the dataset revealed stacked turbidite fan systems—the Saturn Complex—bearing strong similarities to the oil-rich plays farther south. Pancontinental and Custos are now re-marketing the block to potential partners for drilling.
Another Orange Basin position comes through Giraffe Energy Investments (Pty) Ltd, in which Sintana also owns a 49% stake. Giraffe holds a 33% interest in PEL 79 (Blocks 2815 and 2915), with Namcor serving as the operator with a 67% interest. In July 2025, the Ministry of Mines and Energy granted a twelve-month extension for the joint venture to complete seismic interpretation and partner engagement.
Sintana’s carried reach further includes PEL 90 (Block 2813B), operated by a Chevron affiliate, Harmattan Energy, where Inter Oil (Pty) Ltd, a Custos subsidiary, holds a 10% stake. The Kapana-1X exploration well drilled in January 2025 was non-commercial but provided key geological calibration for future work in the southern Orange Basin. Sintana retains a small indirect interest through Inter Oil.
While investor attention remains focused on the Orange Basin, Sintana’s footprint also extends to the Walvis Basin, where Chevron operates PEL 82, having assumed 80% ownership and operatorship in 2024.
Custos and Namcor each maintain 10% free-carried interests.
Onshore, Sintana participates via Custos in PEL 103, covering the Waterberg Basin near the Botswana border. Work there is limited to desktop geological studies and early field reconnaissance, but it adds an unconventional oil-and-gas component to Sintana’s otherwise offshore-weighted portfolio.
Analysts estimate that Custos’s 10% stake in PEL 83 alone could represent a gross asset value approaching US$900 million at in-ground metrics of US$3 per barrel. Sintana’s 49% interest in Custos equates to roughly US$440 million of indirect exposure.
Even after applying conservative risk discounts typical for frontier exploration, the implied value of Sintana’s Namibian portfolio still exceeds its 2025 market capitalisation, which hovers around C$200 million.
The rest of the portfolio—PEL 87, 79, 90 and 103—adds an estimated US$150–180 million of additional un-risked exposure, according to internal company modelling and partner disclosures.
Public filings list Knowledge Katti among Sintana’s largest shareholders, with approximately 6%, alongside Charlestown Capital Advisors LLC at roughly 5.6%. Institutional and retail investors hold the remainder.
The company maintains a lean structure in Toronto with operational coordination through its Namibian partners.
In the coming year, the focus will remain on Galp’s Mopane appraisal programme and Pancontinental’s renewed farm-out drive for PEL 87. Seismic interpretation continues on PELs 79 and 90, while Waterberg’s PEL 103 advances through early geological evaluation. Each step, though funded by others, incrementally increases Sintana’s optionality across Namibia’s emerging hydrocarbon frontier.
For a company with no rigs, no seismic vessels, and no operator obligations, Sintana has managed to secure a front-row seat in one of the most exciting oil plays of the decade—proving that in exploration, leverage can sometimes matter more than operatorship.
