Petrobras, in addition to the Material Fact disclosed on May, 08 and May 10, 2018, informs that is paying today Interest on Capital (IOC), as defined in art. 9, sole paragraph of its Bylaws.

The value to be distributed, totaling R$652.2 million, corresponds to a gross amount of R$0.05 per common or preferred share, based on shareholding positions as of May 21, 2018. The amount of R$ 0.05 per share related to the JCP will be subject to income tax, by applying the applicable tax rate, except for to be immune or exempt shareholders.

CREDIT INSTRUCTIONS

Payment will be made by Banco do Brasil S.A., institution depositary of book-entry shares.

Shareholders who have a bank account at Banco do Brasil S.A., or at other banks, whose registration is properly filled out, will receive an automatic credit in their bank account today.

For shares deposited in the fungible custody of stock markets, payment will be credited in the respective stock markets and will be transferred to shareholders by deposit brokers .

For the American Depositary Receipts (ADRs) negotiated at the New York Stock Exchange (NYSE), payment will be made by BNY Mellon, depositary bank of ADRs. Information and clarifications may be obtained at www.adrinform.com.

The Interest on Capital not claimed within 3 (three) years as of the date of payment (05/29/2018) will expire and will be reverted in favor of the company (Law 6404/76, Article 287, Item II, subitem a).

This payment of IOC will be imputed to the mandatory minimum dividend (article 53, paragraph 3, of the Bylaws), including for the purpose of payment of priority minimum dividends of preferred shares.