Number of constituents in AEX® Index will increase to 30

Adjustments in methodology to better represent local market structure and increase diversification of Dutch blue-chip index

Amsterdam – 11 March 2025 – Euronext today announced that the number of constituents in the AEX® Index will increase from the top 25 companies traded on Euronext Amsterdam to the top 30 companies in terms of Free Float Market Capitalisation, including a buffer zone. The number of constituents in the AMX® will remain 25, while the number of constituents in the AScX® will be reduced to a maximum of 20 companies.

These modifications are the result of an extensive technical consultation process with the market that was held from 7 February to 7 March 2025. The consultation was carried out with the objective of determining the best outcome for all stakeholders.

The changes in the methodology of the AEX® Index Family are designed to improve diversification and better represent the diversity of issuers listed on Euronext Amsterdam.

In addition to the changes to the number of constituents, updated liquidity requirements and capping factors for individual index constituents will be implemented.

The AEX® index will continue to act as the benchmark measure of the performance of the leading companies listed on the Dutch market.

The new rules will be effective after the close of 19 September 2025, on the occasion of the quarterly index review.

René van Vlerken, CEO Euronext Amsterdam, said: "This improved version of the AEX is designed to better represent the diverse group of large issuers listed on Euronext Amsterdam. The revised rules are designed to cater to the preferences of investors seeking to gain exposure to the vibrant Amsterdam equities market. As an exchange and index provider, we strive to make the AEX – the flagship benchmark of the Amsterdam market since 1983 – more appealing to investors, and thereby to channel capital more effectively towards the domestic and international companies that list on Euronext Amsterdam."

Notes to Editors:

¹ More information on the technical consultation can be found on the Euronext Live Markets website.

CONTACTS

MEDIA – mediateam@euronext.com

The Netherlands Marianne Aalders +31 20 721 41 33

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