Announcement of regulated information pursuant to Law 3556/2007 – Notification of transactions

Y/KNOT Invest A.E. (hereinafter the "Company") announces, pursuant to Law 3556/2007 and Article 19 of Regulation (EU) 596/2014, that, following relevant information it received, the foreign company under the corporate name Indigo Marine Inc., a legal entity which, within the meaning of Article 3 para. 1 point 26(d) of Regulation (EU) 596/2014, has close associations by virtue of being indirectly controlled by Messrs. Rigas Tzortzis, Chairman of the Company's Board of Directors, and Panagiotis Tzortzis, Non-Executive Member of the Company's Board of Directors, namely persons who, within the meaning of Article 3 para. 1 point 25(a) of Regulation (EU) 596/2014, discharge managerial responsibilities in the Company, acquired shares of the Company through purchases as follows:

(a) on 06.05.2026 it acquired 200.000 shares with a total value of EUR 241.407,

(b) on 07.05.2026 it acquired 50.000 shares with a total value of EUR 61.305,67, and

(c) on 08.05.2026 it acquired 29.000 shares with a total value of EUR 34.563,00.

Furthermore, pursuant to the provisions of Articles 9 and 14 of Law 3556/2007 and Article 4.1.1 (8) of the Athens Exchange Rulebook, as in force, the Company informs the investing public that:

(a) according to the notification dated 11/05/2026 that it received on 11/05/2026 from the foreign company under the corporate name Indigo Marine Inc., on 06/05/2026 its voting rights percentage amounted to 30,02%, i.e. it recorded a change of more than 3% from the last notification of change made on 06/03/2026, at which time it held a voting rights percentage in the Company of 26,75%, and Indigo Marine Inc. held on 06/05/2026 11.401.751 common shares and corresponding voting rights in the Company, and

(b) according to the three (3) relevant notifications dated 11/05/2026 that it received on 11/05/2026 from the foreign company under the corporate name GSI Invest GmbH and Messrs. Panagiotis Tzortzis and Rigas Tzortzis respectively, the Company was informed that the above shareholder Indigo Marine Inc. is 100% controlled by GSI Invest GmbH, a legal entity headquartered in Germany, which in turn is controlled by Messrs. Rigas Tzortzis and Panagiotis Tzortzis, who act in concert within the meaning of Article 10 of Law 3556/2007 and who, as a result, on 06.05.2026 indirectly held 11.401.751 common shares and corresponding voting rights in the Company, i.e. 30,02%.

Kifisia, 11.05.2026