<img src="https://ml-eu.globenewswire.com/Resource/Download/2f60e418-440e-4e96-9048-8bafce5545a7?size=2" nborder="0" align="left" hspace="5" vspace="5" title="new logo soitec.png" alt="SOITEC"/>Bernin, on June 3, 2026 <table align="center" style="border-collapse: collapse; width:479.5pt; border-collapse:collapse ;"><tr><td style="width:639.34px;;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; ">INFORMATION RELATING TO THE TOTAL NUMBER OF VOTING RIGHTS AND SHARES FORMING THE SHARE CAPITAL</td></tr></table> (Article L. 233-8 II of the French Commercial Code and article 223-16 of the General Regulation of the French financial markets authority (AMF)) Corporate name and address of the company:     SOITEC Parc Technologique des Fontaines - Chemin des Franques 38190 Bernin (FRANCE) <table style="border-collapse: collapse; margin-left:0.9pt; width:476.1pt; border-collapse:collapse ;"><tr><td style="width:118.67px;;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: top ; ">Statement date</td><td style="width:128.67px;;vertical-align: middle; text-align: left; padding-left: 15.0px; text-align: center ; vertical-align: middle; vertical-align: middle; text-align: left; padding-left: 10.0px; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: top ; ">Total number of shares forming the share capital</td><td style="width:387.47px;;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: top ; ">Total number of voting rights</td></tr><tr><td rowspan="2" style="width:118.67px;;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: top ; text-align: center ; vertical-align: middle; ">05/31/2026  </td><td rowspan="2" style="width:128.67px;;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: top ; text-align: center ; vertical-align: middle; ">35,772,015(1)  </td><td style="width:387.47px;;vertical-align: middle; text-align: left; padding-left: 15.0px; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: top ; ">Number of theoretical (gross) voting rights (2): 44,782,133</td></tr><tr><td style="width:387.47px;;vertical-align: middle; text-align: left; padding-left: 15.0px; border-top: solid black 1pt ; border-right: solid black 1pt ; border-bottom: solid black 1pt ; border-left: solid black 1pt ; vertical-align: top ; ">Number of exercisable (net) voting rights (3): 44,756,111</td></tr></table> (1)   35,772,015 ordinary shares of €2.00 par value each, listed on the Euronext Paris regulated market under ISIN code FR0013227113 and the mnemonic “SOI”. (2)   The total number of theoretical voting rights (or “gross” voting rights) is used as the basis for calculating the crossing of shareholding thresholds. In accordance with article 223-11 of the General Regulation of the French Financial Markets Authority (Autorité des Marchés Financiers - AMF), this number is calculated on the basis of all shares to which single or double voting rights are attached, including shares without voting rights (for example, treasury shares, liquidity contract, etc.). (3)   The total number of exercisable voting rights (or “net” voting rights) is calculated after taking into account the number of shares entitled to double voting rights, and after deduction of the shares without voting rights (for example, treasury shares, liquidity contract, etc.). ***** About Soitec Soitec (Euronext - Tech Leaders - SBF 120), a world leader in innovative semiconductor materials, has been developing cutting-edge products delivering both technological performance and energy efficiency for over 30 years. From its global headquarters in France, Soitec is expanding internationally with its unique solutions, and generated revenue of 600 million euros in fiscal year 2025-2026. Soitec occupies a key position in the semiconductor value chain, serving three main strategic markets: Mobile Communications, Automotive and Industrial, and Edge and Cloud AI. The company relies on the talent and diversity of nearly 2000 employees, representing 50 different nationalities, working at its sites in Europe, the United States and Asia. Nearly 4,800 patents have been registered by Soitec. Soitec, SmartSiC™ and Smart Cut™ are registered trademarks of Soitec. For more information consult our <a href="https://www.globenewswire.com/Tracker?data=3Wt9ftjZK17hFpfT0hIYPbLDQhQVKJQQRf-zNSEcClUQ6PDpZpi78pwD7h6K6Pq7psEjZLs8jl9vYh5voL-jsg==" rel="nofollow" target="_blank" title="website">website</a> and follow us on<a href="https://www.globenewswire.com/Tracker?data=RCstc_gHwLfD2_NfrdwtBeyh7p8Yiu2NJ0zEZKJlOmvvDT3f4VUobZXDczMB5rk9Tz6Opaum9hJYG8sSyYRJX5ID9ZepbdOpkN8zQnLxiCZJnh7qjFTS4BbbFRd7vlH4" rel="nofollow" target="_blank" title="LinkedIn"> LinkedIn</a> and X:  <a href="https://www.globenewswire.com/Tracker?data=YBKVW3gvYf-pvBLqVJ4ieSTYcNn7Fmg0EDnFd86H0j1NSIR-zFSxGvzmQiLMkEJY00BvvnzTy7ebsUHrSuVWOvu2xW1D0DQm5tE6VV1fkPs=" rel="nofollow" target="_blank" title="@Soitec_Official">@Soitec_Official</a> ***** Media Relations: <a href="https://www.globenewswire.com/Tracker?data=4wjqIT_1sseVTKnkqJAHTCE52Qx5MNwYdVs31IKtMlutNsMW6-iv59W5oiCDDehQ80abxNPZkGDubOXqUHmKupUhQSm-og8a0S3j4L0eOL4=" rel="nofollow" target="_blank" title="media@soitec.com">media@soitec.com</a> Investor Relations: investors@soitec.com 
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SOITEC - INFORMATION RELATING TO THE TOTAL NUMBER  OF VOTING RIGHTS AND SHARES  FORMING THE SHARE CAPITAL AS OF MAY 31, 2026

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