Sintana, Challenger merger would create southern Atlantic Margin E&P specialist

The boards of Sintana Energy and Challenger Energy have concluded terms for a proposed merger. Sintana has built an exploration position offshore Namibia, while Challenger holds interests in two licenses offshore Uruguay.
Oct. 10, 2025
2 min read

Sintana Energy has reached an agreement to acquire Challenger Energy under an all-shares offer valued at about £45 million ($60.2 million).

Challenger is an AIM-quoted E&P company holding interests in two exploration blocks offshore Uruguay: AREA OFF-1 (Chevron as operator with 60%, and Challenger with 40%) and AREA OFF-3 (Challenger, 100%). The company also has exploration interests offshore the Bahamas.

Sintana is a TSXV-quoted oil and gas exploration company. Its portfolio in Namibia includes a 4.9% indirect interest in the Galp-operated deepwater Mopane discoveries in PEL 83, and indirect interests in four other Namibian offshore blocks. 

To the north, the company has entered a heads of term agreement to acquire a 5% indirect share of KON-16 in Angola's onshore Kwanza Basin.

A combination of the two companies would create an Atlantic-margin focused oil and gas exploration specialist. The increased scale, they claim, would provide opportunities to deploy their combined strengths in future oil and gas projects.

Challenger expects required permits to be issued shortly for seismic acquisition to start on AREA OFF-1 either later this year or early in 2026.

Having completed the first phase of a technical work program for AREA OFF-3, a formal farm-out process is underway. Challenger hopes to select a suitable partner during the first quarter of 2026.

About the Author

Jeremy Beckman

Editor, Europe

Jeremy Beckman has been Editor Europe, Offshore since 1992. Prior to joining Offshore he was a freelance journalist for eight years, working for a variety of electronics, computing and scientific journals in the UK. He regularly writes news columns on trends and events both in the NW Europe offshore region and globally. He also writes features on developments and technology in exploration and production.

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