6-K

UNITEDSTATES

SECURITIESAND EXCHANGE COMMISSION

Washington,D.C. 20549

FORM6-K

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16 UNDER THE

SECURITIESEXCHANGE ACT OF 1934

Forthe month of March 2026

CommissionFile Number: 001-41639

SMX(SECURITY MATTERS) PUBLIC LIMITED COMPANY

(ExactName of Registrant as Specified in Charter)

MespilBusiness Centre, Mespil House

SussexRoad, Dublin 4, Ireland

Tel:+353-1-920-1000

(Address of Principal Executive Offices) (Zip Code)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

The board of directors (“Board”) of SMX (Security Matters) PLC (the “Company”) appointed Tan Cheong Hwai, Richard G. Hayes, newly appointed directors of the Company, and Pebble Sia Huei-Chieh, to fill the vacancies on the Company’s audit committee, with Richard G. Hayes appointed as the chairperson. Each member of the Company’s audit committee qualifies as an independent director according to the rules and regulations of the SEC and Nasdaq with respect to audit committee membership. In addition, all audit committee members meet the requirements for financial literacy under applicable SEC and Nasdaq rules.

Additionally, the Board also appointed Tan Cheong Hwai, Richard G. Hayes, newly appointed directors of the Company, and Pebble Sia Huei-Chieh, to fill the vacancies on the Company’s compensation committee, with Pebble Sia Huei-Chieh appointed as the chairperson. Such members qualify as independent directors according to the rules and regulations of the SEC and Nasdaq with respect to compensation committee membership.

This Form 6-K is hereby incorporated by reference into the Company’s Registration Statement on Form S-8 (Registration No.: 333-294122).

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: March 13, 2026