PRESS RELEASE

Regulated information – Inside information

Brussels, 11 September 2026 – 07:00 CET

Disclosure of a transparency notification
(Article 14, first paragraph, of the Act of 2 May 2007 on the disclosure of major holdings)

Transparency notification by Baltisse Group

In accordance with the Act of 2 May 2007 on the publication of important participations in listed companies, Recticel (Euronext: RECT) publishes the following notification:

1. Summary of the notification

Recticel (Euronext: RECT) has received a transparency notification dated 9 September 2026, stating that on 3 September 2026 the companies Baltisse NV, Floorenter NV, Spring Holdco BV and Servint BV, although ultimately controlled by the same person, namely Mr Filiep Balcaen, entered into an agreement to act in concert with regard to Recticel NV and the shares issued by Recticel NV held by them.

2. Content of the notification

The notification dated 9 September 2026 contains the following information:

• Reason for the notification: The conclusion, modification or termination of an agreement to act in concert
• Notification by:
  • - Persons acting in concert
  • - A parent undertaking or a controlling person
• Persons subject to the notification requirement:

• Persons that dispose of voting rights: unknown
• Transaction date: 3 September 2026
• Threshold that is crossed: 25%
• Denominator: 57,098,420
• Details of the notification:

PRESS RELEASE

Regulated information – Inside information

Brussels, 11 September 2026 – 07:00 CET

• Chain of controlled undertakings through which the participating interest is effectively held: Baltisse is controlled by the company Enterhold S.A., which in turn is controlled by STAK Patek, wholly controlled by Mr Filiep Balcaen.

Spring Holdco BV is a company controlled by Baltisse NV. Spring Maatschap is a partnership controlled by Baltisse NV.

Floorenter NV is a sister company of Baltisse NV and is also controlled by Enterhold S.A., which in turn is controlled by STAK Patek, wholly controlled by Mr Filiep Balcaen.

Servint BV is controlled by Gulf Invest Holding GmbH, which in turn is controlled by Mr Filiep Balcaen.

The Transparency notice can be consulted on the Recticel Group website via the link Shareholders | Recticel

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About the Recticel Group

Recticel Group is a leading insulation company headquartered in Belgium, with operations in eight countries across Europe and the US. It offers smart insulation solutions that advance a carbon-free economy and a better quality of life.

Our Insulation Boards division provides high-performance insulation solutions to meet the growing demand for energy efficiency and sustainability in buildings. The insulation boards are marketed by Recticel Insulation, our vacuum insulated panels by Turvac, and our bespoke solutions for tapered and flat roofs by Gradient.

Our Insulated Panels division specialises in premium quality products for the building envelope sector. Trimo enables the highest aesthetic standards and extends architectural capabilities with its mineral wool insulated panels and modular space solutions. Conventional mineral wool and PIR insulated panels are manufactured by Rex Panels & Profiles. The recently acquired Miclar, Kuras and Isopanel focus on downstream services for the insulated panels market.

Within our Acoustic Solutions division, Soundcoat provides highly specialised acoustic engineering capabilities for the aerospace and aviation market, as well as for OEMs and the heavy-duty and transport industries.

At the end of 2025, Recticel Group employed 1,311 people and achieved sales of EUR 655.1 million.

The Science Based Targets initiative (SBTi) approved Recticel Group’s near-term targets for the reduction of Scope 1, 2 & 3 greenhouse gas emissions by 2030 (from base year 2021) and net-zero targets for 2050. The Group is on the CDP A List for Climate Change, earned an EcoVadis Silver rating and obtained an MSCI AA rating. Recticel Group is included in the Financial Times list of Europe’s Climate Leaders 2026.

Recticel Group is listed on Euronext in Brussels (Euronext: RECT - Reuters: RECT.BR - Bloomberg: RECT:BB).

Financial calendar

Media & Investor Relations

Jan Vergote
Executive Chairman
vergote.jan@recticel.com
+32 2 775 18 01

Investor Relations

Bart Van den Eede
Chief Financial & Legal Officer
vandeneede.bart@recticel.com
+32 2 775 18 01

Recticel NV
Bourgetlaan 42 avenue du Bourget
1130 Brussels
Belgium

This press release is available in English and Dutch on www.recticel.com.