Paris, September 10, 2026 – Advised by Walter Billet Avocats, Redalpine acted as co-lead investor alongside OTB Ventures in Arlequin AI’s €28 million Series A funding round. This fundraising—backed exclusively by European investors, including Bpifrance’s Defense Innovation Fund, existing investors Vsquared Ventures and 10x Founders, as well as Xavier Niel and Zebox (CMA CGM’s startup accelerator)—will enable the company to accelerate the development of a new AI architecture based on topological neural networks and to deploy its technology internationally. Founded in Paris in 2024, Arlequin AI develops AI designed for environments where governments and businesses must make high-stakes decisions based on vast, fragmented datasets, while ensuring results are backed by underlying evidence. The startup has already developed and deployed a platform capable of analyzing relationships between heterogeneous data, ranging from documents and transactions to video and operational information. Legal advisors for the transaction: Walter Billet Avocats advised Redalpine, represented by partners Fabien Billet and Christophe Cussaguet. Gide represented OTB Ventures, represented by partner Louis Oudot de Dainville, Counsel Diane Jouffroy, and Pierre Lemaire. Squair advised Arlequin AI, represented by partner Damien Gorse and Louis Le Roy. PRESS CONTACT: Comm’ In-Out – Franck Moulins 1 Tel.: +33 (0)623 174 398 – Email: [email protected] walterbillet.com PRESS RELEASE walterbillet.com 2 PRESS CONTACT: Comm’ In-Out – Franck Moulins Tel. : +33 (0)623 174 398 – Email: [email protected] ABOUT WALTER BILLET AVOCATS Since its inception in January 2015, Walter Billet Avocats has positioned itself as a growth partner for companies and investment funds, providing tailored expertise and guidance in corporate law (M&A, Private Equity), innovative technologies (particularly IT and the Internet), and intellectual property. With a corporate department covering the full spectrum of equity-related legal matters, the firm meets the needs of businesses of all sizes—from start-ups to SMEs and mid-caps—and their financial shareholders looking to structure financing rounds, LBOs, external growth operations, or business combinations. In the IT/IP field, the firm provides both advisory and litigation support to clients in the IT sector and across all industries, leveraging its expertise in innovative technology issues (contract law, the Internet, GDPR compliance, etc.) and trademark portfolio management.