[6-K] MATERIALISE NV Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Materialise NV reported that it has published a listing prospectus in connection with an additional listing of its ordinary shares on Euronext Brussels. This new listing is intended to complement the existing Nasdaq listing of its American depositary shares, which represent ordinary shares of the company. The prospectus was prepared under European Union and Belgian regulations and is provided as an exhibit to the report, giving investors in Europe a locally listed line of ordinary shares alongside the U.S.-listed ADSs.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 001-36515

Materialise NV

Technologielaan 15

3001 Leuven

Belgium

(Address of principal executive office)

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  x            Form 40-F ¨

On November 18, 2025, Materialise NV (the “Company” or “Materialise”) published a prospectus dated as of even date (the “Listing Prospectus”), prepared and disseminated by the Company pursuant to applicable European Union and Belgian laws and regulations, in relation to its additional listing of its ordinary shares on Euronext Brussels, to complement the existing Nasdaq listing of its American depositary shares (ADSs) representing ordinary shares.

A copy of the Listing Prospectus is attached hereto as Exhibit 99.1.

EXHIBIT INDEX

Exhibit		Description
99.1		Listing Prospectus dated November 18, 2025

SIGNATURE

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.

	MATERIALISE NV
	By:	/s/ Brigitte de Vet-Veithen
	Name:	Brigitte de Vet-Veithen
		De Vet Management BV
	Title:	Chief Executive Officer

Date: November 18, 2025

FAQ

What did Materialise NV (MTLS) announce in this Form 6-K?

Materialise NV announced that it published a listing prospectus related to the additional listing of its ordinary shares on Euronext Brussels, complementing its existing Nasdaq listing of American depositary shares.

Which securities of Materialise NV are listed on Euronext Brussels and Nasdaq?

Materialise NV is arranging an additional listing of its ordinary shares on Euronext Brussels, while its American depositary shares (ADSs) representing ordinary shares are listed on Nasdaq.

What is the purpose of the new listing prospectus for Materialise NV (MTLS)?

The listing prospectus was prepared and disseminated under European Union and Belgian laws to support the additional listing of Materialise NV's ordinary shares on Euronext Brussels.

Where can investors find the listing prospectus of Materialise NV?

The listing prospectus is attached as Exhibit 99.1 to the report and is identified as the Listing Prospectus dated November 18, 2025.

Does this filing indicate any change to Materialise NV's Nasdaq listing?

The filing states that the Euronext Brussels listing of ordinary shares is intended to complement the existing Nasdaq listing of ADSs, rather than replace it.

Under which form does Materialise NV file its annual reports with the SEC?

Materialise NV files its annual reports with the SEC under Form 20-F, as indicated in the report.

Who signed the Materialise NV Form 6-K related to the Euronext Brussels listing?

The report was signed on behalf of Materialise NV by Brigitte de Vet-Veithen of De Vet Management BV, in her capacity as Chief Executive Officer.