Praia de Botafogo, 370 • 13º andar Botafogo • 22250-040 • Rio de Janeiro/RJ

+55 21 3721 3800

petroriosa.com.br

NOTICE TO THE MARKET

PRIO3 IS INCLUDED INTO BOVESPA INDEX (B3)

Rio de Janeiro, September 8, 2020 - Petro Rio S.A. ("Company" or "PetroRio") (B3: PRIO3) informs its shareholders and the market in general that, on the present date, its shares were included into the portfolio of Bovespa Index ("Ibovespa" or "IBOV"), principal index of B3, composed of shares with the highest traded volume in the past 12 months.

PetroRio's shares were included into the position 63 among 77 listed companies, ahead of traditional companies, with higher revenues and market value, which evidences a strong visibility and awareness of the Company in the local and international capital markets. Similarly, the presence in the Ibovespa increases the visibility of the Company, which allows the search for a higher number of investment funds for PRIO3.

The Company, which already part of several indexes, including IBrX-100, SMLL, IGCX, IGC-NM and ITAG), is now listed in a total of nine indexes on the São Paulo Stock Exchange.

PetroRio believes that the inclusion into new indexes is result of hard work of its team in expanding its participation, relevance and exposure in the local and international markets. The Company will continue to focus on its growth strategy, seeking, through its deliveries, generation of value to its shareholders.

About PetroRio

PetroRio is one of the largest independent companies in the oil and gas production in Brazil. The Company seeks to increase production through the acquisition of new production assets, reexploration, increased operational efficiency and reduction of production costs and corporate expenses. PetroRio's main objective is to create value for its shareholders with growing financial discipline and preserving its liquidity, with full respect for safety and the environment. For further information, please visit the Company's website:www.petroriosa.com.br.

Disclaimer

All statements other than statements of historical fact contained in this document are forward-looking statements, including, without limitation, statements regarding our drilling and seismic plans, operating costs, acquisitions of equipment, expectations of finding oil, the quality of oil we expect to produce and our other plans and objectives. Readers can identify many of these statements by looking for words such as "expects", "believe", "hope" and "will" and similar words or the negative thereof. Although management believes that the expectations represented in such forward-looking statements are reasonable, there can be no assurance that such expectations will prove to be correct. By their nature, forward-looking statements require us to make assumptions and, accordingly, forward-looking statements are subject to inherent risks and uncertainties. We caution readers of this document not to place undue reliance on our forward-looking statements, since a number of factors may cause actual future circumstances, results, conditions, actions or events to differ materially from the plans, expectations, estimates or intentions expressed in the forward-looking statements and the assumptions underlying the forward-looking statements. The forward-looking statements included herein are based on the assumption that our plans and operation will not be affected by such risks, but that if our plans and operation are affected by such risks, the forward-looking statements may become inaccurate. The forward-looking statements included in this document are expressly qualified in their entirety by this disclaimer. These statements were made on the date of this document. We take no responsibility for updating these forward-looking statements, unless otherwise required by the applicable marketable securities legislation.

Praia de Botafogo, 370 • 13º andar • Botafogo • 22250-040 • Rio de Janeiro/RJ+55 21 3721 2129 petroriosa.com.br

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Petro Rio SA published this content on 08 September 2020 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 08 September 2020 12:14:03 UTC