GQG Partners builds 5.03% Petrobras (NYSE: PBR) common equity stake

Rhea-AI Filing Summary

Petróleo Brasileiro S.A. – Petrobras reports that asset manager GQG Partners LLC has increased the total exposure of its client portfolio in Petrobras securities. According to a letter received under Brazilian disclosure rules, GQG’s client holdings now amount to 187,199,112 common shares and American Depositary Receipts (ADRs), representing approximately 5.03% of Petrobras’ common shares in issue. Crossing this threshold triggers a major-shareholder disclosure and signals that GQG-managed portfolios have become a significant holder in the company’s common equity.

Insights

Equity ownership analyst

GQG-managed portfolios now hold about 5.03% of Petrobras common shares.

Petrobras discloses that GQG Partners LLC has increased total client exposure to 187,199,112 common shares and ADRs, or about 5.03% of common shares. This reflects a sizable institutional position but does not change Petrobras’ capital structure.

The stake is held across GQG’s client portfolios, so influence depends on how those portfolios vote and engage. The filing simply documents that a shareholder has crossed a key ownership threshold required by CVM Resolution No. 44.

Future company disclosures may indicate whether this holding leads to any formal shareholder proposals or governance engagement. As presented, it is an ownership notification rather than a transaction affecting Petrobras’ cash flows or operations.

Key Figures

GQG client exposure: 187,199,112 common shares and ADRs Ownership percentage: 5.03% of common shares

2 metrics

GQG client exposure 187,199,112 common shares and ADRs Total Petrobras securities held by GQG client portfolios

Ownership percentage 5.03% of common shares Portion of Petrobras common shares issued held via GQG clients

Key Terms

American Depositary Receipts (ADRs), CVM Resolution No. 44, forecasts, Section 27A of the Securities Act of 1933, +1 more

5 terms

American Depositary Receipts (ADRs) financial

"187,199 112 common shares and American Depositary Receipts (ADRs), representing approximately 5.03%"

American depositary receipts (ADRs) are certificates issued by a U.S. bank that represent ownership of shares in a foreign company, letting those shares trade on U.S. exchanges in U.S. dollars. Think of an ADR as a U.S. receipt for a foreign stock: it makes buying and selling simpler and subjects the investment to familiar U.S. trading rules, which matters to investors because it improves access and liquidity while still carrying risks like currency moves and different dividend handling.

CVM Resolution No. 44 regulatory

"in compliance with the provisions of Article 12 of CVM Resolution No. 44"

forecasts financial

"This document may contain forecasts within the meaning of Section 27A of the Securities Act of 1933"

Forecasts are forward-looking estimates of a company’s future performance—such as sales, profits, or cash flow—based on current information and assumptions. They matter to investors because they shape expectations about value and risk, much like a weather forecast helps decide whether to carry an umbrella: optimistic forecasts can lift share prices, while disappointing ones can trigger selling or reassessment of investment decisions.

Section 27A of the Securities Act of 1933 regulatory

"forecasts within the meaning of Section 27A of the Securities Act of 1933, as amended"

Section 21E of the Securities Trading Act of 1934 regulatory

"and Section 21E of the Securities Trading Act of 1934, as amended"

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FAQ

What major ownership change did Petrobras (PBR) disclose in this 6-K?

Petrobras disclosed that GQG Partners LLC’s client portfolios now hold 187,199,112 common shares and ADRs, equal to about 5.03% of Petrobras’ common shares. This crosses a key ownership threshold requiring market disclosure under Brazilian securities rules.

Who is the new significant shareholder of Petrobras (PBR) mentioned in the filing?

The filing identifies GQG Partners LLC as managing client portfolios with significant exposure to Petrobras. GQG’s clients collectively hold 187,199,112 common shares and ADRs, representing approximately 5.03% of Petrobras’ common shares issued, making them a major shareholder under disclosure rules.

How large is GQG Partners’ client exposure to Petrobras (PBR) shares?

GQG Partners’ client portfolios have total exposure to 187,199,112 Petrobras common shares and ADRs. This position represents about 5.03% of all Petrobras common shares issued, signaling a substantial institutional holding that triggered mandatory ownership disclosure by the company.

Does the GQG Partners stake change Petrobras (PBR) capital structure?

The disclosed GQG Partners stake does not alter Petrobras’ capital structure. It reflects secondary-market ownership of 187,199,112 common shares and ADRs, about 5.03% of common shares, managed for GQG’s clients, with no new shares issued by Petrobras in this notice.

Why did Petrobras (PBR) have to announce the GQG Partners holding?

Petrobras announced the GQG Partners holding in compliance with Article 12 of CVM Resolution No. 44. Crossing the approximately 5.03% ownership level in Petrobras common shares triggered a requirement to inform shareholders and the market through an official communication.

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 May, 2026

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 Acquisition of a Significant Equity Interest

—

Rio de Janeiro, May 21, 2026 – Petróleo Brasileiro S.A. – Petrobras, , in compliance with the provisions of Article 12 of CVM Resolution No. 44, hereby informs its shareholders and the market in general that it has received a letter from GQG Partners LLC stating that the total exposure of its client portfolio has increased to 187,199 112 common shares and American Depositary Receipts (ADRs), representing approximately 5.03% of the common shares issued by the company. The full text of the correspondence is attached to this Market Announcement.

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.

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.

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.

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.

 

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.

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: May 21, 2026

PETRÓLEO BRASILEIRO S.A–PETROBRAS

By: /s/ Fernando Sabbi Melgarejo

______________________________

Fernando Sabbi Melgarejo

Chief Financial Officer and Investor Relations Officer