Cenergy Holdings S.A.

Declaration of Voting Results & Voting Rights Announcements • Dec 17, 2025

REGULATED INFORMATION

PRESS RELEASE

Brussels, December 17, 2025, 5:40 pm CET

The enclosed information constitutes regulated information as defined in the Belgian Royal Decree of 14 November 2007 regarding the duties of issuers of financial instruments which have been admitted for trading on a regulated market.

Publication of a transparency notification

(Article 14, first paragraph of the Law of 2 May 2007 on disclosure of major holdings)

1. Summary of the notification

Cenergy Holdings SA (Cenergy Holdings) announces that on December 16, 2025, it received a transparency notification from Viohalco SA (Viohalco). Following disposal by Viohalco of 3,723,481 outstanding shares in Cenergy Holdings, Viohalco's voting rights in Cenergy Holdings crossed downwards the threshold of 70%, i.e. from 71.46% to 69.71% of the total voting rights of Cenergy Holdings (i.e. 69.68% directly held by Viohalco and 0.03% due to treasury shares of Cenergy Holdings, controlled entity by Viohalco).

In accordance with its obligation under article 14 of the Belgian Law of 2 May 2007 on the disclosure of significant shareholdings in listed companies, Cenergy Holdings publishes the content of the notification that it has received.

2. Content of the notification

The notification dated 16 December 2025 contains the following information:

• Reason for the notification: Disposal of voting securities or voting rights
• Notification by: A parent undertaking or a controlling person
• Person subject to the notification requirement:

Viohalco SA	Avenue Marnix 30, 1000 Brussels, Belgium
Cenergy Holdings	Avenue Marnix 30, 1000 Brussels, Belgium

• Date on which the threshold is crossed: 12 December 2025
• Threshold that is crossed: 70%
• Denominator: 212,384,903 shares

• Details of the notification:

A) Voting rights	Previous notification	After the transaction
	# of voting rights	# of voting rights		% of voting rights
Holders of voting rights		Linked to securities	Not linked to the securities	Linked to securities	Not linked to the securities
Viohalco SA	151,710,878	147,987,397		69.68%
Cenergy Holdings	67,103	72,387		0.03%
Subtotal	151,777,981	148,059,784		69.71%
	TOTAL	148,059,784	0	69.71%	0.00%

• Full chain of controlled undertakings through which the holding is effectively held: Viohalco SA controls Cenergy Holdings SA.

• Additional information:

Following disposal by Viohalco of 3,723,481 outstanding shares in Cenergy Holdings, Viohalco now holds 69.68% of the total share capital of Cenergy Holdings (corresponding to 69.71% voting rights due to treasury shares).

3. Miscellaneous

This press release may be consulted on the website of Cenergy Holdings via this link: https://cenergyholdings.com/newscategories/regulatory/.

This notification can be consulted on the website of Cenergy Holdings via this link: https://cenergyholdings.com/investors/shareholders-information/shareholders-information/.

Contacts

For further information, please contact:

Sofia Zairi Chief Investors Relations (+32) 2 2240960 (+30) 210 6787773 ir@cenergyholdings.com

About Cenergy Holdings

Cenergy Holdings is a Belgian holding company listed on both Euronext Brussels and Athens Stock Exchange, investing in leading industrial companies, focusing on the growing global demand of energy transfer, renewables and data transmission. The Cenergy Holdings portfolio consists of Corinth Pipeworks and Hellenic Cables, companies positioned at the forefront of their respective high growth sectors. Hellenic Cables is one of the largest cable producers in Europe, manufacturing power and telecom cables as well as submarine cables. Corinth Pipeworks is a world leader in steel pipe manufacturing for the energy sector and major producer of steel hollow sections for the construction sector. For more information, please visit our website at www.cenergyholdings.com.