Avantium N.V.

Regulatory Filings • Aug 13, 2025

Avantium Provides Update on a Proposed Comprehensive Funding Package

AMSTERDAM, 12 August 2025, 18:00 hrs CEST – Avantium N.V., a leading company in renewable and circular polymer materials, announces important developments in its long-term funding strategy. The Company has reached a conditional agreement with its Lenders (ABN AMRO, ASN, ING, Invest-NL, and Rabobank) to extend and amend its existing Senior Debt Financing Agreement, subject to a successful equity raise planned for September 2025. As a result, Avantium will not publish its 2025 Half-Year Results on 13 August 2015 but rather in September together with the prospectus for the planned equity raise.

Comprehensive Funding Package

Avantium aims to secure a comprehensive funding package, combining government investments, equity and amended debt terms, to finance its path to profitability. A key element is now the agreed extension and amendment of its Debt Financing Agreement with its Lenders, subject to a successful equity raise. Upon completion of the equity raise, Avantium will cancel the remaining €14.1 million debt commitment by the Lenders in exchange for substantially improved terms, which are designed to enhance long-term cash preservation through materially lower interest rates and reductions in repayment obligations. The key amendments include:

• Extension of the loan maturity date to 30 June 2028 (from 31 March 2026).
• Lower interest rates, with part of the cash interest converted to payment-in-kind, subject to key milestones.
• Issuance of warrants connected to the extension of the loan maturity, with a value of approximately €2.5 million, with the warrant price calculated based on the 30-day VWAP of Avantium's shares ending on 12 August 2025. All outstanding warrants held by the Lenders (excluding ASN) will be subject to a lock-up period ending 180 days after the completion of the equity raise.

Avantium plans to launch an equity raise in September 2025. Avantium has secured conditional support from Invest-NL to act as an underwriter for the equity raise and is currently in active discussions with a number of financial institutions and investors to obtain further support in the form of underwriting and pre-commitments. Full details will be provided in a forthcoming prospectus.

Rescheduling of 2025 Half-Year Results Publication

To align with the equity raise, Avantium will publish its 2025 Half-Year Results in September alongside the prospectus for the planned equity raise, instead of on 13 August 2025, ensuring that stakeholders receive a consistent and complete financial update.

Leadership Update

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Following the agreement on the amendment to the Debt Financing Agreement, interim CFO Bert Cornelese has stepped down and is succeeded with immediate effect by interim CFO René Ploegsma.

René Ploegsma is a seasoned CFO and entrepreneurial finance leader with over 25 years of experience. He has a strong track record in professionalizing finance functions, leading M&A and fundraising processes, and aligning finance with strategic business objectives. He previously served as CFO at companies including MCPV Nederland and LeydenJar Technologies, and held interim executive roles at, amongst others, Essent N.V.

About Avantium

Avantium is a pioneering commercial-stage company focused on renewable & circular polymer materials. Avantium develops and commercialises 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.

This press release by Avantium N.V. contains information that qualified or may have qualified as inside information for the purposes of Article 7 of the Market Abuse Regulation (EU) 596/2014 (MAR).

Forward-looking information / disclaimer

This press release may include forward-looking statements. Other than reported financial results and historical information, all statements included in this press release, including, without limitation, those regarding our financial position, business strategy and management plans and objectives for future operations, are forward-looking statements. These forward-looking statements are based on our current expectations and projections about future events and are subject to risks and uncertainties that could cause actual results to differ materially from those expressed in the forward-looking statements. Many of these risks and uncertainties relate to factors that are beyond Avantium's ability to control or estimate precisely, such as future market conditions, the behaviour of other market participants and the actions of governmental regulators. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release and are subject to change without notice. Other than as required by applicable

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law or the applicable rules of any exchange on which our securities may be traded, we have no intention or obligation to update forward-looking statements.

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