Avenida Henrique Valadares, 28 – 19th floor
20231-030 – Rio de Janeiro, RJ
Federative Republic of Brazil

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or 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.

www.petrobras.com.br/ir

For more information:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investors Relations

email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 19 Andar – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947 | 0800-282-1540

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.

Rio de Janeiro, May 17th, 2023 – Petróleo Brasileiro S.A. – Petrobras informs that it has identified the presence of hydrocarbons in the Santos Basin pre-salt, in an appraisal well in the Aram block.

Well 3-BRSA-1387D-SPS is located 260 km from the city of Santos-SP, at a water depth of 1,979 meters.

The well is in progress and the oil-bearing interval was verified through wireline logging and fluid samples, which will be further characterized through laboratory analyses. These data will allow evaluating the potential and directing the next exploratory activities in the area. The consortium will continue operations to complete the project to drill the well to the expected depth and verify the extent of the new discovery, in addition to characterizing the conditions of the reservoirs found.

The Aram block constitutes an important asset for exploring the remaining pre-salt potential, particularly in the Santos basin. In addition, the well presented a fluid of excellent quality, confirming the low levels of contaminants. This discovery augments the possibilities of expanding the accumulation discovered by the wildcat well 1-BRSA-1381-SPS, in this block.

The Aram block was acquired in March 2020, in the 6^th Bidding Round of the National Agency for Petroleum, Natural Gas and Biofuels (ANP), under the Production Sharing regime, with Pre-Sal Petróleo S.A. (PPSA) as manager. Petrobras is the operator of the block and holds an 80% share, in partnership with CNPC (20%).

www.petrobras.com.br/ir

For more information:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investors Relations

email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 19 Andar – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947 | 0800-282-1540

www.petrobras.com.br/ir

For more information:

PETRÓLEO BRASILEIRO S.A. – PETROBRAS | Investors Relations

email: petroinvest@petrobras.com.br/acionistas@petrobras.com.br

Av. Henrique Valadares, 28 – 19 Andar – 20231-030 – Rio de Janeiro, RJ.

Tel.: 55 (21) 3224-1510/9947 | 0800-282-1540

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.