PRESS RELEASE UPDATE TO THE 2026 FINANCIAL CALENDAR Milan, 14 September 2026 – Guidotti Ships S.p.A. (“Guidotti Ships” or the “Company”), an operator specializing in offshore maritime services in the Central Adriatic, active in the sectors of offshore support, marine survey, pollution response, and seasonal passenger transport (ticker code: GDT), pursuant to Article 17 of the Euronext Growth Milan Issuers’ Regulations, announces that the 2026 financial calendar has been amended as follows: • 28 September 2026 (instead of 29 September 2026) – Board of Directors meeting to approve the Half-Year Financial Report as of June 30, 2026. Any further amendments to the financial calendar will be promptly communicated to the market. *** This press release is available in the “Investor Relations/Press Releases” section of the website www.guidottiships.it and on www.1info.it. For the dissemination of regulated information, Guidotti Ships uses the 1INFO SDIR & STORAGE system (www.1info.it), managed by Computershare S.r.l., with headquarters at Via Lorenzo Mascheroni 19, Milan. Guidotti Ships S.p.A. Founded in 2000 by a family with a passion for the maritime sector spanning more than seven generations, Guidotti Ships S.p.A. is a company specializing in maritime services in the Mediterranean. The company operates in four business lines - offshore support, marine survey, pollution control services, and seasonal passenger transport - through a fleet of 12 owned multifunctional vessels operating 24/7. Holding the leading certifications for quality, safety, and environmental protection, Guidotti Ships supports industrial and institutional clients with integrated solutions that meet the highest operational standards. The listing on Euronext Growth Milan is part of a growth strategy that includes expanding the fleet, increasing the workforce, and advancing qualification programs with national and international operators in the energy, oil & gas, and underwater infrastructure sectors. Contacts Guidotti Ships S.p.A. Value Track SIM S.p.A. Investor Relator Euronext Growth Advisor & Global Coordinator Giada Garofalo Mail: ecm@value-track.com Tel: +39 347 1747595 Mail: investor.relator@guidottiships.it Twister communications group Communication Advisor Mail: guidottiships@twistergroup.it Lucia Saluzzi - Tel: +39 347 5536979 Lorenzo Zatta - Tel: +39 349 1848897