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16 Mar 2026

Chammas & Marcheteau Advises Extens on Merger of Orthalis and DentalSoft to Create SignalSoft Développement

"Chammas & Marcheteau advised Extens, a leading investor in European health software, on its investment alongside Bpifrance and BNP Paribas Développement to support Orthalis in its combination with DentalSoft. The transaction creates SignalSoft Développement, bringing together Orthalis and DentalSoft—a recognized provider of orthodontic practice management software—into a leading group with a significant installed base and sector expertise. The Chammas & Marcheteau team included Nicolas Lecocq (partner), Pierre Rougemond, Sandie Dion and Antoine Auzoux‑Dutheil on corporate/M&A; Aude Spinasse (partner) and Constance Parini on IP; Christophe Moreau (partner) and Franck Hallel on tax; and Coline Bied‑Charreton (partner) and Floriane Maginot on employment law."

Chammas & Marcheteau advised Extens in the transaction supporting Orthalis in its rapprochement with the DentalSoft group (Extens invested alongside Bpifrance and BNP Paribas Développement). Transaction summary: Extens, together with Bpifrance and BNP Paribas Développement, invested to accompany Orthalis in a new growth phase through its combination with DentalSoft; the operation creates the new group SignalSoft Développement. DentalSoft is a recognized publisher of practice-management software for orthodontic clinics and, together with Orthalis, forms a leading, specialist platform with a significant installed base. Chammas & Marcheteau deal team (name — seniority — practice area as stated in the release): - Nicolas Lecocq — Partner — Corporate & M&A - Pierre Rougemond — Lawyer — Corporate & M&A - Sandie Dion — Lawyer — Corporate & M&A - Antoine Auzoux-Dutheil — Lawyer — Corporate & M&A - Aude Spinasse — Partner — Intellectual Property - Constance Parini — Lawyer — Intellectual Property - Christophe Moreau — Partner — Tax - Franck Hallel — Lawyer — Tax - Coline Bied-Charreton — Partner — Employment / Social law - Floriane Maginot — Lawyer — Employment / Social law
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