Information to Shareholders

The auction related to the tender offer (OPA) for the purpose of Zamp S.A.’s registration conversion was successfully completed on September 8, 2025, with 98% of eligible shares approving the registration conversion.

Given that the required quorum for the registration conversion was achieved, shareholders holding outstanding shares who wish to sell their shares to the offeror may do so through the following channels:

♦ B3:

• How? On B3’s trading environment, subject to the submission of a sell order through your broker.
• When? Until the effective date of the registration conversion, which may occur prior to the final deadline of December 23, 2025.
• At what price? At the same price paid under the tender offer, i.e., R$3.50 per share.

♦ Bookkeeping Agent:

• How? Directly with the Bookkeeping Agent, in accordance with the procedure described in the Notice to Shareholders.
• When? During the 90-day period from September 23, 2025 to December 23, 2025.
• At what price? At the same price paid under the tender offer, i.e., R$3.50 per share, adjusted by the IPCA inflation index (from the date of the auction settlement to the date of actual payment).

Accordingly, Zamp shareholders who intend to sell their shares must observe the deadlines indicated above in order to take advantage of the liquidity window provided during this period.

Following the effective conversion of the registration, Zamp shares will no longer be traded on B3. Therefore, once the three (3)-month period following the auction settlement date for the sale of the Company’s shares to the Offeror has elapsed – as provided in paragraph 2 of article 12 of CVM Resolution No. 85 – any subsequent sales of shares will depend exclusively on private, direct negotiations.

For more information: ri@zamp.com.br 

Bookkeeping Agent: +55 (11) 3003-9285 (capitals) | 0800 720 9285 (other regions)