<img src="https://ml-eu.globenewswire.com/Resource/Download/6800b367-22d7-4cb6-94af-999fb2240ca8?size=2" nborder="0" align="left" hspace="5" vspace="5" title="GTT" alt="GTT"/>Disclosure of the total number of voting rights and shares composing the share capital as of May 31, 2026 Articles L. 233-8-II of the French Commercial Code and 223-16 of the General Regulation of the Autorité des Marchés Financiers Saint-Rémy-lès-Chevreuse, June 1, 2026 <table align="center" style="border-collapse: collapse; width:503.8pt; border-collapse:collapse ;"><tr><td style="width:149px;;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 ; ">Date</td><td style="width:115.6px;;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 shares</td><td style="width:217.87px;;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 ; ">Theoretical total number of voting rights1</td><td style="width:189.27px;;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 ; ">Net total number of voting rights2</td></tr><tr><td style="width:149px;;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 ; ">May 31, 2026</td><td style="width:115.6px;;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 ; ">37,117,772</td><td style="width:217.87px;;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 ; ">37,117,772</td><td style="width:189.27px;;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 ; ">37,064,515</td></tr></table> Investor Relations Contact          <a href="https://www.globenewswire.com/Tracker?data=avRzHIsds8q3-90fO3zEJdrj6RH4oOMrj68O7cQCl6QtM8zj5b-THx0OrhxfpmkUajFX-Eo18je1zGwJbRk_0IzOwkZeoYymw7G3qo56lnmzlNvd-MC2aW39J-oIG08g" rel="nofollow" target="_blank" title="information-financiere@gtt.fr">information-financiere@gtt.fr</a> / + 33 1 30 23 42 64                          <hr /> 1 Calculated on the basis of all the shares to which voting rights are attached, including shares stripped of voting rights (pursuant to article 223-11 of the General Regulation of the Autorité des marchés financiers). 2 Excluding treasury shares 
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Disclosure of the total number of voting rights and shares composing the share capital as of May 31, 2026

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