The New U.S. Offer is only being made to U.S. Holders who are the beneficial owners of Ordinary Shares. The New U.S. Offer is
made solely by the Offer to Purchase and related Letter of Transmittal, which are included in CMB’s Schedule TO filed with the U.S. Securities and Exchange Commission (SEC). The New U.S. Offer commences on October 23, 2024, and will expire at 10:00
A.M., New York City time, on November 21, 2024, unless the expiration of the New U.S. Offer is extended to a subsequent date in accordance with U.S. and Belgian law. U.S. Holders of Ordinary Shares tendering their Ordinary Shares will have withdrawal
rights during this period as required by U.S. securities laws. U.S. Holders holding Ordinary Shares through a securities intermediary should comply with the dates communicated by such securities intermediary, as such dates may differ from the dates
and times noted in the U.S. Offer to Purchase. U.S. Holders of Ordinary Shares are responsible for determining and complying with any applicable cut-off times and dates. Any U.S. Holder of Ordinary Shares desiring to tender all or any portion of the
Ordinary Shares owned by such U.S. Holder can accept the New U.S. Offer by (1) completing and signing a letter of transmittal (or a copy thereof, provided the signature is original) in accordance with the instructions in the letter of transmittal and
mail or deliver it and all other required documents to the U.S. Tender Agent (as defined below), at the address on the back cover page of the Offer to Purchase or (2) tendering such Ordinary Shares pursuant to the procedures for book-entry transfer
set forth in the Offer to Purchase. Any U.S. Holder of Ordinary Shares registered in the name of a broker, dealer, commercial bank, trust company or other nominee must contact such broker, dealer, commercial bank, trust company or other nominee if
such U.S. Holder desires to tender such Ordinary Shares.
CMB has retained Georgeson LLC to act as information agent for the New U.S. Offer and Computershare Trust Company, N.A., to act
as depositary and paying agent for the New U.S. Offer (the “U.S. Tender Agent”).
Each Shareholder that is a U.S. Holder is urged to consult with his or her independent professional adviser regarding any
acceptance of the New U.S. Offer including, without limitation, to consider the tax consequences associated with such Shareholder’s election to participate in the New U.S. Offer. No offer to acquire securities has been made, or will be made, directly
or indirectly, in or into, or by the use of mails or any means of instrumentality of interstate or foreign commerce or any facilities of a national securities exchange of, the United States or any other country in which such offer may not be made other
than (i) in accordance with the requirements of Regulations 14D and 14E under the Exchange Act or the securities laws of such other country, as the case may be or (ii) pursuant to an available exemption from such requirements. THE U.S. OFFER TO PURCHASE HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SEC OR ANY STATE SECURITIES COMMISSION, NOR HAS THE SEC OR ANY STATE SECURITIES COMMISSION PASSED UPON THE FAIRNESS OR MERITS OF THE NEW U.S. OFFER OR
UPON THE ACCURACY OR ADEQUACY OF THE INFORMATION CONTAINED IN THE U.S. OFFER TO PURCHASE. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL AND A CRIMINAL OFFENSE.
Shareholders that are U.S. Holders who wish to participate in the New U.S. Offer, are urged to read the tender
offer statement on Schedule TO (including the offer to purchase, related letter of transmittal and certain other offer documents) that will be filed with the SEC by CMB and the related solicitation/recommendation statement on Schedule 14D-9 that will
be filed with the SEC by CMB.TECH relating to the New U.S. Offer because such documents will contain important information that U.S. Holders should consider before making any decision with respect to the New U.S.
Offer. U.S. Holders may obtain a free copy of these documents after they have been filed with the SEC, and other documents filed by CMB and CMB.TECH with the SEC, at the SEC’s website at www.sec.gov, or by contacting Georgeson LLC, the information agent for the New U.S. Offer via telephone by calling +1 (888) 815-4069 for U.S. Holders or via +1 (781) 896-6948 for shareholders
outside the US, or via email to CMB.TECH@georgeson.com.