CARBIOS — Board/Management Information 2026

May 18, 2026

PRESS RELEASE

This press release, in English, is for information only. Solely the French version is the Carbios official document.

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Carbios announces a change in its governance and the appointment of Benoît Grenot as Chief Executive Officer

Clermont-Ferrand (France), May 18, 2026 (5:45 p.m. CEST). Carbios (Euronext Growth Paris: ALCRB) announces an evolution of its governance.

At the age of 64, and having expressed his wish to retire, Vincent Kamel will step down from his position as Chief Executive Officer effective May 31, 2026, at midnight. The Board of Directors has appointed Benoît Grenot as Chief Executive Officer of Carbios, effective June 1, 2026.

Isabelle Parize, Chair of the Board of Directors of Carbios: “On behalf of the Board, I would like to warmly thank Vincent Kamel for his commitment and the work accomplished in a demanding environment. His leadership enabled significant progress, notably the signing of a strategic partnership with Wankai New Materials, major advances in the Longlaville plant construction project, as well as rigorous management of the Company’s operating expenses. The appointment of Benoît Grenot as Chief Executive Officer reflects our desire to ensure continuity and stability in the Company’s governance. His international experience, particularly in China, as well as his leadership, will be key assets in implementing our strategic priorities.”

Vincent Kamel, Chief Executive Officer of Carbios: “I am proud of the progress achieved alongside the Board of Directors and the teams, and I thank them for their commitment. I have full confidence in Benoît to lead the next phase of the Company’s development.”

Benoît Grenot, Deputy Chief Executive Officer of Carbios: “I am honored by the trust placed in me by the Board of Directors to assume these new responsibilities, and I intend to build on the work already underway. I will also ensure that all teams, whose strength I already fully appreciate, are mobilized around the Company’s strategic priorities, with a spirit of commitment and sustainable performance.”

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About Carbios:

Carbios is a biotechnology company that develops and industrializes biological solutions to reinvent the lifecycle of plastics and textiles. Inspired by nature, Carbios designs enzyme-based biological processes to break down plastics, with the mission of preventing plastic and textile pollution and accelerating the transition to a circular economy. Its two innovative technologies dedicated to PET biorecycling and PLA biodegradation are currently scaling up to industrial and commercial levels. Carbios is supported by prestigious brands in the cosmetics, food, and apparel industries, aiming to improve the recyclability and circularity of their products. Nestlé Waters, PepsiCo, and Suntory Beverage & Food Europe are members of a packaging consortium founded by Carbios and L’Oréal. On, Patagonia, PUMA, PVH Corp., and Salomon collaborate with Carbios in a textile consortium. Carbios is part of the global community of B Corp™ certified companies that are transforming their business models to serve the common good.

Visit www.carbios.com to learn more about biotechnology for circular plastics and textiles.

LinkedIn : carbios / Instagram : carbios

PRESS RELEASE

This press release, in English, is for information only. Solely the French version is the Carbios official document.

Information on Carbios shares:

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ISIN Code FR0011648716 Ticker Code Euronext Growth: ALCRB LEI 969500M2RCIWO4NO5F08

Carbios is eligible for the PEA-PME, a government program allowing French residents investing in SMEs to benefit from income tax rebates.

Disclaimer on forward-looking statements and risk factors:

This press release contains forward-looking statements, not historical data, and should not be construed as a guarantee that the facts and data stated will occur. These forward-looking statements are based on data, assumptions and estimates considered reasonable by Carbios. Carbios operates in a competitive and rapidly evolving environment. It is therefore not in a position to anticipate all risks, uncertainties or other factors that may affect its business, their potential impact on its business or the extent to which the materialization of a risk or combination of risks could lead to results that differ significantly from those mentioned in any forwardlooking statement. Carbios draws your attention to the fact that forward-looking statements are in no way a guarantee of its future performance and that its actual financial position, results, cash flows, its partnerships and corporate agreements, and the development of the sector in which Carbios operates may differ significantly from those proposed or suggested by the forward-looking statements contained in this document. In addition, even if Carbios’ financial position, results, cash flows, its partnerships and corporate agreements, and developments in the industry in which it operates are consistent with the forward-looking information contained in this document, such results or developments may not be a reliable indication of Carbios’ future results or developments. Readers are also advised to carefully consider the risk factors described in the Universal registration document filed with the French Market Authority (“AMF”), as well as in the half-year financial report available free of charge on the Company’s website. Should all or any part of these risk factors occur or others, in no case whatsoever will Carbios be liable to anyone for any decision made or action taken in conjunction with the information and/or statements in this press release or for any related damages. This information is given only as of the date of this press release. Carbios makes no commitment to publish updates to this information or on the assumptions on which it is based, except in accordance with any legal or regulatory obligation applicable to it.

For additional information, please contact:

Carbios Carbios Agnès Mathé Benjamin Audebert Communications Investor Relations agnes.mathe@carbios.com contact@carbios.com +33 (0)4 73 86 51 76 +33 (0)4 73 86 51 76

Maarc - Press Relations

Bruno Arabian

bruno.arabian@maarc.fr +33 (0)6 87 88 47 26 Simon Dulucq Simon.dulucq@maarc.fr +33 (0) 6 10 98 55 64