Avantium N.V.

Regulatory Filings • Dec 17, 2025

Avantium Provides Update on Government-Related Funding Timeline

AMSTERDAM, 16 December 2025, 18:00 hrs CET – Avantium N.V., a pioneer in renewable and circular polymer materials, today provides an update on the funding from a government-related investment initiative. Originally anticipated as a follow-on to the September 2025 equity raise, the timeline has now shifted due to extended governmental procedures and approval processes. Based on ongoing substantive discussions with the relevant authorities and strong governmental support, Avantium remains confident that this funding can be secured.

About Avantium

Avantium is a pioneering commercial-stage company focused on renewable & circular polymer materials. Avantium develops and commercializes innovative technologies for the production of materials based on sustainable carbon feedstocks, i.e. carbon from biomass or carbon from the air (CO2). The most advanced technology is the YXY® Technology that catalytically converts plantbased sugars into FDCA (furandicarboxylic acid), the key building block for the sustainable plastic PEF (polyethylene furanoate). PEF is known under the brand name releaf®, an EU registered trademark of Avantium. Avantium has successfully demonstrated the YXY® Technology at its pilot plant in Geleen, the Netherlands, and is in the process of starting the world's first commercial plant for FDCA in Delfzijl, the Netherlands. Avantium works in partnership with like-minded companies around the globe to develop revolutionary renewable chemistry solutions from invention to commercial scale.

Avantium's shares are listed on Euronext Amsterdam and Euronext Brussels (symbol: AVTX). Avantium is incorporated in the Euronext Amsterdam SmallCap Index (AScX). Its offices and headquarters are in Amsterdam, the Netherlands.

For more information: Caroline van Reedt Dortland, Director Communications +31-20-5860110 / +31-613400179 mediarelations@avantium.com

Aarne Luten, Head of Investor Relations +31-625687714 ir@avantium.com