Petrobras (PBR) adds 27.5% stake in São Tomé Block 4 to its African portfolio
Rhea-AI Filing Summary
Petróleo Brasileiro S.A. – Petrobras has completed the acquisition of a 27.5% stake in Block 4, an offshore exploratory block in São Tomé and Príncipe, Africa, joining a consortium led by Shell (30%), along with Galp (27.5%) and ANP-STP (15%).
The company has been active in São Tomé and Príncipe since February 2024, when it acquired stakes in Blocks 10, 11 and 13, and describes this new deal as strengthening its exploratory activities in Africa and supporting portfolio diversification. Petrobras states that the transaction aligns with its 2025–2029 Strategic Plan, aiming to replenish oil and gas reserves through exploration of new frontiers and partnerships, and that all internal governance procedures were followed.
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Insights
Petrobras deepens African exploration footprint with a new 27.5% stake.
Petrobras is expanding its upstream presence in São Tomé and Príncipe by acquiring a 27.5% interest in Block 4, joining a consortium with Shell as operator, Galp, and ANP-STP. This adds to interests already held in Blocks 10, 11 and 13, and reflects a deliberate move into an emerging exploration province rather than mature basins.
The company explicitly links this transaction to portfolio diversification and its 2025–2029 Strategic Plan, emphasizing reserve replenishment through frontier exploration and partnerships. Having Shell operate the block concentrates technical and operational responsibility with a major international player, while Petrobras participates as a non-operator partner.
The filing does not quantify investment size or potential production, so the financial materiality cannot be gauged here. The main takeaway is strategic: Petrobras is using partnerships in Africa to pursue long-term reserve growth, consistent with its stated exploration and diversification goals.
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What new asset did Petrobras (PBR) acquire in São Tomé and Príncipe?
Petrobras completed the acquisition of a 27.5% stake in Block 4, an exploratory offshore block in São Tomé and Príncipe, Africa, joining an existing consortium.
Who are Petrobras' partners in Block 4 in São Tomé and Príncipe?
The Block 4 consortium consists of Shell as operator with 30%, Galp with 27.5%, Petrobras with 27.5%, and ANP-STP with 15%.
How long has Petrobras (PBR) been active in São Tomé and Príncipe?
Petrobras has been active in São Tomé and Príncipe since February 2024, when it acquired a 45% stake in Blocks 10 and 13 and a 25% stake in Block 11.
How does the Block 4 acquisition fit Petrobras' 2025–2029 strategy?
The company states that acquiring Block 4 is aligned with its 2025–2029 Strategic Plan, aiming to replenish oil and gas reserves via exploration of new frontiers and partnership operations.
What strategic goal does Petrobras mention for its African activities?
Petrobras highlights that this transaction strengthens its exploratory activities on the African continent and supports portfolio diversification and long-term reserve replenishment.
Did Petrobras indicate governance compliance for the Block 4 deal?
Yes. Petrobras states the acquisition of Block 4 complied with all internal governance procedures and is in accordance with its strategic plan.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
Report of Foreign Private
Issuer
Pursuant to Rule 13a-16 or 15d-16 of the
Securities Exchange Act of 1934
For the month of September, 2025
Commission File Number 1-15106
PETRÓLEO BRASILEIRO S.A. – PETROBRAS
(Exact name of registrant as specified in its charter)
Brazilian Petroleum Corporation – PETROBRAS
(Translation of Registrant's name into English)
Avenida Henrique Valadares, 28 – 9th floor
20231-030 – Rio de Janeiro, RJ
Federative Republic of Brazil
(Address of principal executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.
Form 20-F ___X___ Form 40-F _______
Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.
Yes _______ No___X____
Petrobras announces participation in exploratory block in São Tomé and Príncipe
—
Rio de Janeiro, September 12, 2025 – Petróleo Brasileiro S.A. – Petrobras informs that it has concluded the acquisition of a 27.5% stake in Block 4, located in São Tomé and Príncipe, Africa. With this acquisition, Petrobras joins the consortium of the aforementioned block, which includes Shell, the operator of the asset (30%), as well as Galp (27.5%) and ANP-STP (15%).
Petrobras has been active in São Tomé and Príncipe since February 2024, when it acquired a 45% stake in Blocks 10 and 13, and a 25% stake in Block 11.
This transaction strengthens Petrobras’ exploratory activities on the African continent, with the purpose of portfolio diversification, and is aligned with the company’s long-term strategy, aiming to replenish oil and gas reserves through exploration of new frontiers and partnership operations.
The acquisition of Block 4 in São Tomé and Príncipe complied with all the company’s internal governance procedures and is in accordance with the 2025-2029 Strategic Plan.
www.petrobras.com.br/ir
For more information:
PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investor Relations
Email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br
Av. Henrique Valadares, 28 – 9th floor – 20231-030 – Rio de Janeiro, RJ.
Tel.: 55 (21) 3224-1510/9947
This document may contain forecasts within the meaning of Section 27A of the Securities Act of 1933, as amended (Securities Act), and Section 21E of the Securities Trading Act of 1934, as amended (Trading Act) that reflect the expectations of the Company's officers. The terms: "anticipates", "believes", "expects", "predicts", "intends", "plans", "projects", "aims", "should," and similar terms, aim to identify such forecasts, which evidently involve risks or uncertainties, predicted or not by the Company. Therefore, future results of the Company's operations may differ from current expectations, and the reader should not rely solely on the information included herein.
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
Date: September 12, 2025
PETRÓLEO BRASILEIRO S.A–PETROBRAS
By: /s/ Fernando Sabbi Melgarejo
______________________________
Fernando Sabbi Melgarejo
Chief Financial Officer and Investor Relations Officer