Frankfurt am Main, August 12, 2026

Press Release

VINCI Energies announces start of acceptance period for €67.50-per-share cash offer to All for One shareholders

• The acceptance period begins on August 12 and ends on September 15, 2026.
• All for One shareholders may tender their shares for €67.50 per share in cash. This represents an attractive premium of 105.4% to the three-month volume-weighted average share price before the offer was announced on July 16, 2026, and 94.5% to the Xetra closing price of All for One shares on July 15, 2026.
• To accept the offer, All for One shareholders should promptly contact their custodian bank or securities services provider.
• Supervisory Board and Management Board of All for One support the offer and, subject to their review of the offer document, intend to recommend that shareholders accept it.
• The offer is subject to a minimum acceptance threshold of 75%.

VINCI Energies Deutschland Enterprise Solutions AcquiCo SE (the “Bidder”), an indirect subsidiary of VINCI S.A., today announced the start of the acceptance period for its voluntary public takeover offer to the shareholders of All for One Group SE (“All for One”). The German Federal Financial Supervisory Authority (“Bafin”) approved the publication of the offer document on August 11, 2026.

Starting today, All for One shareholders may accept the offer by tendering their shares for a cash consideration of €67.50 per share. The acceptance period will end at midnight (Frankfurt am Main local time) on September 15, 2026. Shareholders wishing to accept the offer should promptly contact the custodian bank or any other securities services provider where their All for One shares are held.

The offer price represents an attractive premium of 105.4% to the three-month volume-weighted average share price before the offer was announced on July 16, 2026, and 94.5% to the Xetra closing price of All for One shares on July 15, 2026. The cash offer therefore provides All for One shareholders an opportunity to realise the value of their investment in cash at a highly attractive premium.

Supervisory Board and Management Board of All for One welcome and support the takeover offer and, subject to their review of the offer document, intend to recommend that shareholders accept the offer. They believe the transaction is in the best interests of the company, its shareholders, employees, customers, partners and other stakeholders.

The acquisition is intended to strengthen VINCI Energies’ market position and growth ambitions in the fast-growing digital infrastructure services sector. It will also accelerate the development of Axians, VINCI Energies’ ICT brand, into a leading digital transformation platform for customers across Europe. The combination will bring together Axians’ strong capabilities in ICT infrastructure, cloud, networks and cybersecurity with All for One’s scalable SAP consulting, managed services and business transformation expertise, creating a comprehensive and complementary end-to-end offering.

The Bidder has entered into agreements with All for One’s largest shareholders under which, subject to the terms of the respective agreements, they are required to accept the takeover offer for all All for One shares they hold. Together, these holdings represent approximately 54.7% of All for One’s share capital.

On July 16, 2026, the Bidder and All for One signed a Business Combination Agreement relating to the takeover offer and their intended cooperation following completion. The Bidder has undertaken not to enter into a domination and profit and loss transfer agreement with All for One before January 1, 2029. Provided the statutory requirements are met and such action is economically appropriate at the relevant time, the Bidder intends to initiate a potential delisting of All for One and/or a squeeze-out of the minority shareholders based on the offer price, which already incorporates a strategic premium. This could further reduce trading liquidity.

The takeover offer is subject to a minimum acceptance threshold of 75% plus one share of all outstanding All for One shares and to the satisfaction of the other customary closing conditions, including the required merger control clearances. The full terms and conditions of the takeover offer are set out in the offer document. The offer document, together with further information about the offer, is available at www.afo-offer.com.

Shareholders with questions may also contact the shareholder hotline on:

+49 69 920 149 711 (Monday to Friday, 9:00 a.m. to 5:30 p.m. CET)

About VINCI Energies

In a world undergoing constant change, VINCI Energies contributes to the environmental transition by helping bring about major trends in the digital landscape and energy sector. VINCI Energies’ teams roll out technologies and integrate customised multi-technical solutions, from design to implementation, operation and maintenance. With their strong local roots and agile and innovative structure, VINCI Energies’ 2,200 business units have positioned themselves boosting the reliability, efficiency and sustainability of their customers’ infrastructure and processes. VINCI Energies strives for global performance, caring for the planet, useful to people and committed to local communities.

2025: Revenues of €21.6 billion // 109,000 employees // 2,200 Business Units // 60 countries

www.vinci-energies.com

About Axians

Axians, the ICT brand of VINCI Energies, supports its customers — private-sector companies, public-sector entities, operators and service providers — in their infrastructures and digital solutions development.

Axians offers a comprehensive range of ICT solutions and services spanning business applications and data analytics, digital workspaces, enterprise networks, datacenters, cloud services, cybersecurity and telecommunications infrastructure. Axians’ specialized consulting, design, integration and service teams develop bespoke digital transformation solutions that contribute to successful business outcomes for its customers.

2025: Revenues of €3.8 billion // 16,000 employees // 36 countries

www.axians.com

About All for One Group

All for One Group is an international IT, consulting and service provider with a strong SAP focus. It supports more than 4,500 customers — primarily in Germany, Austria, Poland and Switzerland — end-to-end in their sustainable IT, cloud, AI and business transformation. Its ambition is to translate technology into tangible business value. At the center of this are SAP Cloud ERP as the digital core and AI solutions for intelligent, enterprise-wide and industry-specific processes.

In fiscal year 2024/25, All for One generated revenue of EUR 504 million. The company, headquartered in Filderstadt near Stuttgart, is listed in the Prime Standard of the Frankfurt Stock Exchange.

www.all-for-one.com/ir

Contact:

VINCI Energies D-A-CH

Diana Plantade - +49 69 50 05 15 82

diana.plantade@vinci-energies.com

Brunswick Group

AllForOne@brunswickgroup.com

Important Notice

This announcement is for information purposes only and constitutes neither an offer to purchase nor a solicitation of an offer to sell shares in All for One. The final terms and conditions of the offer and other provisions relating to the offer are set out in the offer document. Investors and holders of All for One shares are strongly advised to read the offer document and all other documents relating to the offer.

The distribution of this press release, the offer and/or its acceptance may be subject to specific regulations or restrictions in certain jurisdictions. This press release is not intended for direct or indirect publication or distribution in any such jurisdiction. Accordingly, VINCI and its subsidiaries disclaim all liability in the event that any person breaches such restrictions.