Clariant Board of Directors decided to reduce its size and enhance corporate governance

AD HOC ANNOUNCEMENT PURSUANT TO ART. 53 LR

Clariant Board of Directors decided to reduce its size and enhance corporate governance

Muttenz, 24 October 2025

Clariant, a sustainability-focused specialty chemical company, today announced that the Board of Directors decided to reduce its size from eleven to eight members, right-sizing the Board to align with Clariant's streamlined operations and addressing investor concerns on independence, tenure and gender diversity. In support of these efforts, five directors, Roberto Gualdoni, Geoffery Merszei, Eveline Saupper, Peter Steiner, and Konstantin Winterstein will not stand for reelection at the 2026 AGM on 1 April 2026. The Board will propose two new, independent Board members to the shareholders as appropriate ahead of the 2026 AGM.

The Board's independent Chairman, Ben van Beurden said, "I would like to thank the departing directors for their valuable service and unwavering contribution on the Board of Clariant. They have provided valuable perspectives and insights over many years as well as their support in effecting these Board changes." "Our joint decision to reduce the size and rejuvenate the Board reflects our commitment to acting consistent with our strategy as well as with best practices of corporate governance", Ben van Beurden added.

CORPORATE MEDIA RELATIONS Jochen Dubiel Phone [phone] [e-mail] Ellese Caruana Phone [phone] [e-mail] Luca Lavina Phone [phone] [e-mail] Follow us on X, Facebook, LinkedIn, Instagram.

INVESTOR RELATIONS Andreas Schwarzwälder Phone [phone] [e-mail] Thijs Bouwens Phone [phone] [e-mail]

This media release contains certain statements that are neither reported financial results nor other historical information. This document also includes forward-looking statements. Because these forward-looking statements are subject to risks and uncertainties, actual future results may differ materially from those expressed in or implied by the statements. Many of these risks and uncertainties relate to factors that are beyond Clariant's ability to control or estimate precisely, such as future market conditions, currency fluctuations, the behavior of other market participants, the actions of governmental regulators and other risk factors such as: the timing and strength of new product offerings; pricing strategies of competitors; the company's ability to continue to receive adequate products from its vendors on acceptable terms, or at all, and to continue to obtain sufficient financing to meet its liquidity needs; and changes in the political, social and regulatory framework in which the Company operates or in economic or technological trends or conditions, including currency fluctuations, inflation and consumer confidence, on a global, regional or national basis. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this document. Clariant does not undertake any obligation to publicly release any revisions to these forward-looking statements to reflect events or circumstances after the date of these materials. www.clariant.com Clariant is a focused specialty chemical company led by the overarching purpose of "Greater chemistry - between people and planet." By connecting customer focus, innovation, and people, the company creates solutions to foster sustainability in different industries. On 31 December 2024, Clariant totaled a staff number of 10 465 and recorded sales of CHF 4.152 billion in the fiscal year. Since January 2023, the Group conducts its business through the three Business Units Care Chemicals, Catalysts, and Adsorbents & Additives. Clariant is based in Switzerland.