<img src="https://ml-eu.globenewswire.com/Resource/Download/22e4c3bb-a275-4591-a830-f89a36246a58?size=2" nborder="0" align="left" hspace="5" vspace="5" title="ALSTOM SA" alt="ALSTOM SA"/>21 May 2026 Information pursuant to article L. 233-8 II of the Code de commerce and articles 223-16 and 223-11 of the AMF General regulation (Règlement général de l’Autorité des marchés financiers) <table align="center" style="border-collapse: collapse; width:422.25pt; border-collapse:collapse ;"><tr><td style="width:187.67px;;text-align: center ; vertical-align: middle; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: middle ; ">Date</td><td style="width:187.67px;;text-align: center ; vertical-align: middle; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: middle ; ">Number of shares with a nominal value of €7</td><td style="width:187.67px;;vertical-align: middle; text-align: left; padding-left: 30.0px; text-align: center ; vertical-align: middle; vertical-align: middle; text-align: left; padding-left: 30.0px; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: middle ; text-align: center ; vertical-align: middle; ">Gross number of voting rights</td></tr><tr><td style="width:187.67px;;text-align: center ; vertical-align: middle; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: middle ; ">21 May 2026</td><td style="width:187.67px;;border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: middle ; ">        462,616,024</td><td style="width:187.67px;;text-align: center ; vertical-align: middle; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: middle ; text-align: center ; vertical-align: middle; "> 462,616,024   </td></tr></table> <table style="border-collapse: collapse; width:498.9pt; border-collapse:collapse ;"><tr><td colspan="2" style="width:665.2px;;vertical-align: top ; "> </td></tr><tr><td style="width:109.6px;;vertical-align: top ; ">About Alstom</td><td style="width:555.6px;;text-align: justify ; vertical-align: middle; vertical-align: top ; text-align: justify ; vertical-align: middle; ">Alstom is the pure rail leader, committed to making rail the backbone of sustainable transportation. We design and deliver a complete range of future-ready solutions – from high-speed and regional trains to metros, monorails, trams, turnkey systems, end-to-end services, infrastructure, signalling and digital rail solutions. With 87,800 people in 61 countries, Alstom brings together global expertise and multi-local presence to make every journey smarter, cleaner and more enjoyable. Together with our partners and customers, we realise the power of rail. Listed in France, Alstom generated revenues of €19.2 billion for the fiscal year ending 31 March 2026. For more information, please visit <a href="https://www.globenewswire.com/Tracker?data=y3tXFjuD_vjffnXIipCYFO53HHv62nvlSRRFA94cXEMsOgo_TbeZTQdqOkmzjEeV_IN1Adttm6t0EzTEQnLx5Q==" rel="nofollow" target="_blank" title="www.alstom.com">www.alstom.com</a>.  </td></tr><tr><td style="width:109.6px;;vertical-align: top ; ">Contacts</td><td style="width:555.6px;;vertical-align: top ; ">Press: Charles-Etienne LEBATARD – T: +33 (0) 7 63 43 68 60 mediarelations@alstomgroup.com   Philippe MOLITOR – T +33 (0)7 76 00 97 79 <a href="mailto:Philippe.molitor@alstomgroup.com" rel="nofollow" target="_blank" title="">Philippe.molitor@alstomgroup.com</a>   Investor Relations: Cyril GUERIN – T: +33 (0)6 07 89 36 16 cyril.guerin@alstomgroup.com   Guillaume GAUVILLE – T: +44 (0)7 588 022 744 guillaume.gauville@alstomgroup.com   Jalal DAHMANE – T: +33 (0)6 98 19 96 62 jalal.dahmane@alstomgroup.com</td></tr></table>
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ALSTOM S.A: Disclosure of the total number of voting rights and shares  forming the share capital as at 21 May 2026

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