Form 6-K BRASKEM SA For: Jun 30

Parties

Braskem and Petróleo Brasileiro S.A. – Petrobras ("Petrobras").

Relationship with the issuer

Petrobras is a Shareholder with Significant Influence over Braskem.

Purpose

Spot purchase and sale contract for polymer grade propylene, from the Alberto Pasqualini Refinery (“REFAP”), between Braskem, as buyer, and Petrobras, as seller, which reached a new amount of R$50 million on 06/12/2025.

Key Terms and Conditions

On 01/07/2022, it was announced, through a Notice on Related-Party Transaction, the execution of five polymer frade propylene purchase and sale contracts between Petrobras and Braskem, each of which refers to one of the following refineries (i) Planalto de Paulínia Refinery (REPLAN), (ii) Henrique Lage Refinery (REVAP), (iii) Presidente Getúlio Vargas Refinery (REPAR), (iv) Capuava Refinery (RECAP) and (v) Duque de Caxias Refinery (REDUC).

In these contracts, there are clauses that provide flexibility for price negotiation and reallocation of quantities between contracts signed between the parties.

On 06/15/2023, the first spot purchase contract by Braskem and sale by Petrobras of polymer grade propylene from the Alberto Pasqualini Refinery (REFAP) was signed, whose purchases were the subject of Communication on Transaction with Related Party on 09/26/2023 and which also provides flexibility for price negotiation and quantity reallocation together with the other contracts mentioned above.

On 09/29/2023, the second spot purchase contract by Braskem and sale by Petrobras of polymer grade propylene from REFAP (“Second REFAP Contract”) was signed, the purchases of which were the subject of a Notice on Related Party Transaction on 11/13/2023.

Later, quantities of propylene from the purchase and sale agreement for polymer grade propylene from REPAR between Braskem and Petrobras (“REPAR Agreement”) were reallocated to the Second REFAP Agreement, whose purchases were the subject of a Notice on Related Party Transaction on 12/18/2023.

On 02/09/2024 the Third Spot Purchase Agreement by Braskem and Sale by Petrobras of Polymer Grade Propylene from REFAP (“Third REFAP Agreement”) was signed, effective until 03/31/2024, reaching a new amount of R$50 million on 03/28/2024, which was the subject of a Notice on Related Party Transaction on 04/09/2024. This agreement was extended until 06/30/2024, reaching a new amount of R$50 million on 06/27/2024, which was the subject of a a Notice on Related Party Transaction on 07/08/2024.

On 07/01/2024, the Fourth Spot Purchase Agreement was signed by Braskem and sale by Petrobras of polymer grade propylene from REFAP, valid until 08/31/2024, reaching a new amount of R$50 million on 08/22/2024, which was the subject of a Notice on Related Party Transaction on 09/02/2024.

On 08/30/2024, the Fifth Spot Purchase Agreement by Braskem and Sale by Petrobras of Polymer Grade Propylene from REFAP was signed, effective until 10/31/2024, reaching a new amount of R$50 million on 09/28/2024, which was the subject of a Notice on Related Party Transaction on 10/08/2024.

On 12/27/2024, the Sixth Spot Purchase Agreement by Braskem and Sale by Petrobras of Polymer Grade Propylene from REFAP was signed, effective until 03/31/2025, reaching a new amount of R$50 million on 02/12/2025, which was the subject of a Notice on Related Party Transaction on 02/21/2025.

On 04/01/2025, the Seventh Spot Purchase Agreement by Braskem and sale by Petrobras of polymer grade propylene from REFAP was signed, valid until 06/30/2025, reaching a new amount of R$50 million on 06/12/2025, as detailed below:

Accumulated net value of the Seventh REFAP Contract up to 06/12/2025: R$50.9 million, of which R$3.8 million is specific to the Seventh REFAP Contract and R$47.1 million comes from the reallocation of resources available in the REPAR Contract.

The prices charged are based on international quotations for polymer grade propylene.

The transaction refers to the purchase of polymer grade propylene referenced in international prices in the US Gulf (Polymer Grade Propylene US Golf Contract Price – PGP USG).