X0202 SCHEDULE 13D/A 0000919574-25-005040 0001910283 XXXXXXXX LIVE 34 Ordinary Shares, no par value 06/17/2026 false 0001604481 B38564108 CMB.TECH NV

DE GERLACHEKAAI 20 ANTWERP C9 2000

Ludovic Saverys 32-3-247-59-11 Compagnie Maritime Belge NV De Gerlachekaai 20 Antwerp C9 2000 Keith J. Billotti, Esq. 212-574-1200 Seward & Kissel LLP One Battery Park Plaza New York NY 10004 0001910283 N Compagnie Maritime Belge NV BK WC N C9 0.00 178726458.00 0.00 178726458.00 178726458.00 N 61.6 CO The reported percentage in line 13 is based on 290,169,769 Ordinary Shares outstanding as of April 1, 2026 (not including the Treasury Shares), as reported in the Issuer's annual report on Form 20-F, as filed with the U.S. Securities and Exchange Commission (the "Commission") on April 21, 2026. 0001910284 N Saverco NV WC N C9 0.00 178750858.00 0.00 178750858.00 178750858.00 N 61.6 CO The Source of Funds in line 4 is as to 24,400 Ordinary Shares owned directly by Saverco NV. The reported percentage in line 13 is based on 290,169,769 Ordinary Shares outstanding as of April 1, 2026 (not including the Treasury Shares), as reported in the Issuer's annual report on Form 20-F, as filed with the Commission on April 21, 2026. 0001910281 N Alexander Saverys OO N C9 0.00 178750858.00 0.00 178750858.00 178750858.00 N 61.6 IN The reported percentage in line 13 is based on 290,169,769 Ordinary Shares outstanding as of April 1, 2026 (not including the Treasury Shares), as reported in the Issuer's annual report on Form 20-F, as filed with the Commission on April 21, 2026. 0001910282 N Ludovic Saverys OO N C9 0.00 178750858.00 0.00 178750858.00 178750858.00 N 61.6 IN The reported percentage in line 13 is based on 290,169,769 Ordinary Shares outstanding as of April 1, 2026 (not including the Treasury Shares), as reported in the Issuer's annual report on Form 20-F, as filed with the Commission on April 21, 2026. 0001910280 N Michael Saverys OO N C9 0.00 178750858.00 0.00 178750858.00 178750858.00 N 61.6 IN The reported percentage in line 13 is based on 290,169,769 Ordinary Shares outstanding as of April 1, 2026 (not including the Treasury Shares), as reported in the Issuer's annual report on Form 20-F, as filed with the Commission on April 21, 2026. Ordinary Shares, no par value CMB.TECH NV DE GERLACHEKAAI 20 ANTWERP C9 2000 This Amendment No. 34 (this "Amendment") to Schedule 13D relates to ordinary shares, no par value (the "Ordinary Shares"), of CMB.TECH NV (the "Issuer") and amends and supplements the initial statement on Schedule 13D filed with the Commission on February 14, 2022, as amended by Amendment No. 1 thereto filed with the Commission on February 23, 2022, Amendment No. 2 thereto filed with the Commission on March 9, 2022, Amendment No. 3 thereto filed with the Commission on April 1, 2022, Amendment No. 4 thereto filed with the Commission on April 4, 2022, Amendment No. 5 thereto filed with the Commission on April 12, 2022, Amendment No. 6 thereto filed with the Commission on April 26, 2022, Amendment No. 7 thereto filed with the Commission on May 4, 2022, Amendment No. 8 thereto filed with the Commission on May 17, 2022, Amendment No. 9 thereto filed with the Commission on May 24, 2022, Amendment No. 10 thereto filed with the Commission on July 13, 2022, Amendment No. 11 thereto filed with the Commission on October 11, 2022, Amendment No. 12 thereto filed with the Commission on December 2, 2022, Amendment No. 13 thereto filed with the Commission on December 5, 2022, Amendment No. 14 thereto filed with the Commission on December 12, 2022, Amendment No. 15 thereto filed with the Commission on December 14, 2022, Amendment No. 16 thereto filed with the Commission on January 18, 2023, Amendment No. 17 thereto filed with the Commission on February 10, 2023, Amendment No. 18 thereto filed with the Commission on February 16, 2023, Amendment No. 19 thereto filed with the Commission on March 24, 2023, Amendment No. 20 thereto filed with the Commission on October 10, 2023, Amendment No. 21 thereto filed with the Commission on November 24, 2023, Amendment No. 22 thereto filed with the Commission on December 22, 2023, Amendment No. 23 thereto filed with the Commission on February 16, 2024, Amendment No. 24 thereto filed with the Commission on March 19, 2024, Amendment No. 25 thereto filed with the Commission on March 25, 2024, Amendment No. 26 thereto filed with the Commission on March 29, 2024, Amendment No. 27 thereto filed with the Commission on April 3, 2024, Amendment No. 28 thereto filed with the Commission on October 9, 2024, Amendment No. 29 thereto filed with the Commission on October 23, 2024, Amendment No. 30 thereto filed with the Commission on November 22, 2024, Amendment No. 31 thereto filed with the Commission on May 30, 2025, Amendment No. 32 thereto filed with the Commission on August 14, 2025 and Amendment No. 33 filed with the Commission on August 20, 2025 (as amended and supplemented, the "Original Schedule 13D," and as further amended and supplemented by this Amendment, the "Schedule 13D"). This Amendment is being filed to report the entry by Compagnie Maritime Belge NV ("CMB") into a USD 500,000,000 revolving credit facility and the grant of security over the Ordinary Shares beneficially owned by CMB, as described herein. Capitalized terms used but not defined in this Amendment No. 34 have the same meanings ascribed to them in the Original Schedule 13D. Except as specifically provided herein, this Amendment No. 34 does not modify any of the information previously reported in the Original Schedule 13D. On June 17, 2026, CMB entered into a USD 500,000,000 revolving credit facility agreement (the "Facility Agreement") and a securities pledge agreement (the "Securities Pledge Agreement") with certain banks. In connection with the transaction, CMB pledged all of its current and future Ordinary Shares of the Issuer as collateral for its obligations under the Facility Agreement. The pledged securities include the 178,726,458 Ordinary Shares directly held by CMB. The Facility Agreement and the Securities Pledge Agreement include financial and other covenants and customary events of default. The Facility Agreement refinanced $250,000,000 of the Borrower's existing USD 500,000,000 syndicated term loan facility agreement dated August 12, 2025 and provides a $250,000,000 revolving credit facility, the proceeds of which may be used for, among other things, asset acquisitions. Item 5(a) - (e) of the Original Schedule 13D is hereby amended and restated as follows: The aggregate number of Ordinary Shares beneficially owned by each Reporting Person is set forth on line 11 of such Reporting Person's cover sheet and is incorporated herein. The percentage of outstanding Ordinary Shares that may be deemed to be beneficially owned by each Reporting Person is set forth on line 13 of such Reporting Person's cover sheet and is incorporated herein. Such percentage was calculated for each Reporting Person based 290,169,769 Ordinary Shares outstanding as of April 1, 2026 (not including treasury shares), as reported in the Issuer's annual report on Form 20-F, as filed with the Securities and Exchange Commission on April 21, 2026. As of the date of this Schedule 13D, CMB directly owns 178,726,458 Ordinary Shares, and has the shared power to vote or direct the vote, and to dispose or direct the disposition, of 178,726,458 Ordinary Shares. Saverco NV directly owns 24,400 Ordinary Shares, and the Reporting Persons (other than CMB) do not directly own any Ordinary Shares. The Reporting Persons (other than CMB) have the shared power to vote or direct the vote, and to dispose or direct the disposition, of 178,750,858 Ordinary Shares. None of the Reporting Persons nor (to the Reporting Persons' knowledge) any person set forth in Item 2 of the Original 13D, has engaged in any transactions in the Ordinary Shares during the past 60 days. Except as disclosed in this Schedule 13D, to the best knowledge of the Reporting Persons, no other person other than the Reporting Persons has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities beneficially owned by the Reporting Persons identified in this Item 5. Not Applicable. Item 6 of Schedule 13D is hereby amended to add the following: The information set forth in Item 4 of this Schedule 13D is incorporated herein by reference. Compagnie Maritime Belge NV /s/ Ludovic Saverys 07/29/2026 Saverco NV /s/ Ludovic Saverys 07/29/2026 Alexander Saverys /s/ Alexander Saverys 07/29/2026 Ludovic Saverys /s/ Ludovic Saverys 07/29/2026 Michael Saverys /s/ Michael Saverys 07/29/2026