Alternus Energy Group

Report Publication Announcement • May 26, 2023

Alternus Energy Group Plc delayed publication of 2022 annual report

Alternus Energy Group Plc delayed publication of 2022 annual report

International Renewable Independent Power Producer (IPP) Alternus Energy Group Plc (OSE: ALT) (“Alternus” or the “Company”) today announces that the publication of its annual accounts for the financial year 2022 under IFRS format will be delayed as the IFRS audit of the accounts by its auditors has not been concluded in time. The Company currently expects to publish Alternus’ annual accounts under IFRS format for the financial year 2022 on or before June 30, 2023.

The Company has already announced its audited financial results for the financial year 2022 under US GAAP format, as previously announced on April 21, 2023. The 2022 financial report under US GAAP format was attached to the Company’s OSE filing on April 21, 2023 as well as available to view on the Alternus Energy website at https://alternusenergy.com/reports-presentations/

An updated financial calendar will be released accordingly.

This information is considered to be inside information pursuant to the EU Market Abuse Regulation and is subject to the disclosure requirements pursuant to Section 5-12 the Norwegian Securities Trading Act.

For More Information:

Alternus Energy Investor Relations

ir@alternusenergy.com

+1 (913) 815-1557

Alternus Energy Group Plc: Financial calendar

FINANCIAL YEAR 2022

30.06.2023 - Annual Report

FINANCIAL YEAR 2023

30.06.2023 - Quarterly Report – Q4

22.09.2023 - Annual General Meeting

29.09.2023 - Half-yearly Report

31.05.2024 – Annual Report

This information is published pursuant to the requirements set out in the continuing obligations.

About Alternus Energy Group Plc

Alternus Energy Group Plc is an international vertically integrated independent power producer (IPP). Headquartered in Ireland, and listed on the Euronext Growth Oslo, the Company develops, installs, owns, and operates midsized utility scale solar parks. The Company also has offices in Rotterdam and the United States. For more information visit www.alternusenergy.com.

Forward Looking Statements: Certain information contained in this letter, including any information on the Company’s plans or future financial or operating performance and other statements that express the Company’s management’s expectations or estimates of future performance, constitute forward-looking statements. When used in this press release, words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “would” and similar expressions, as they relate to us or our management team, identify forward-looking statements. Such forward-looking statements are based on the beliefs of management, as well as assumptions made by, and information currently available to, the Company’s management. Such statements are based on a number of estimates and assumptions that are subject to significant business, economic and competitive uncertainties, many of which are beyond the control of the Company. The Company cautions that such forward-looking statements involve known and unknown risks and other factors that may cause the actual financial results, performance or achievements of the Company could differ materially from the Company’s estimated future results, performance or achievements expressed or implied by the forward-looking statements. The Company undertakes no obligation to update these statements for revisions or changes after the date of this release, except as required by law.