Exhibit 99.1
MATERIALISE
SHARE-BUY BACK PROGRAM
| Leuven – 18 May 2026 – 22h00 CET | Regulated information1 |
Materialise reports on the progress of its share buy-back program announced on 30 October 2025.
18 May 2026 – Materialise NV (Euronext: MTLS) (Nasdaq: MTLS) (“Materialise”) (“the Company”) hereby discloses certain information in relation to its share buyback program announced on 30 October 2025, in accordance with Article 8:4 of the Royal Decree of 29 April 2019 implementing the Belgian Code on Companies and Associations. Under this program, Materialise has granted a discretionary mandate to an independent financial intermediary to repurchase Materialise shares for an amount of up to EUR 30 million.
Materialise reports the purchase of 74,816 Materialise shares in the period from 11 May 2026 up to and including 15 May 2026. The shares were repurchased at an average price of 4.77 EUR per share for a total consideration of 356,986 EUR.
74,816 shares were repurchased through the central order book of the following exchanges:
| Date of repurchase | Exchange | Number of shares | Total amount (EUR) | Total amount (USD) | Average price (EUR) | |||||||||||||||
| 11-May-2026 | NASDAQ | 22,500 | 103,779 | 122,096 | 4.61 | |||||||||||||||
| 12-May-2026 | NASDAQ | 9,226 | 43,973 | 51,616 | 4.77 | |||||||||||||||
| 13-May-2026 | NASDAQ | 20,893 | 100,413 | 117,634 | 4.81 | |||||||||||||||
| 14-May-2026 | NASDAQ | 11,424 | 55,798 | 65,295 | 4.88 | |||||||||||||||
| 15-May-2026 | NASDAQ | 10,773 | 53,022 | 61,654 | 4.92 | |||||||||||||||
| Total of the week | 74,816 | 356,986 | 418,295 | 4.77 | ||||||||||||||||
No shares were repurchased through cross trades or block trades.
Since the start of the share buy-back program on the 26th of January 2026, Materialise has bought back 748,789 shares for a total amount of 3,399,426 EUR (3,999,747 USD) under the share buy-back program. This corresponds to 1.3% of the total shares outstanding.
Materialise currently holds 748,789 of its own shares.
The overview relating to the share buy-back program is available on https://investors.materialise.com/ and will be updated on a weekly basis.
| 1 | The enclosed information constitutes regulated information as defined in the Belgian Royal Decree of 14 November 2007 regarding the duties of issuers of financial instruments which have been admitted for trading on a regulated market. |
About Materialise
Materialise incorporates more than three decades of 3D printing experience into a range of software solutions and 3D printing services that empower sustainable 3D printing applications. Our open, secure, and flexible end-to-end solutions enable industrial manufacturing and mass personalization in various industries — including healthcare, automotive, aerospace, eyewear, art and design, wearables, and consumer goods. Headquartered in Belgium and with branches worldwide, Materialise combines the largest group of software developers in the industry with one of the world's largest and most complete 3D printing facilities.