On 22 September 2026 Groupe BPCE launched an eight-year participatory loan for French defence suppliers, with four years before any principal is repaid, no security over company assets and a partial guarantee from the European Investment Fund under the InvestEU programme. The product answers a problem that sits between bank debt and equity. Defence suppliers are being asked to enlarge factories, carry more inventory, recruit specialist staff and finance longer production cycles before larger order books turn into cash. Equity can absorb that risk but changes who owns the company; conventional senior lending preserves ownership but can impose repayment schedules, collateral requirements and leverage constraints poorly matched to an industrial ramp-up. Subordinated and participatory capital promises an intermediate answer, and lenders present it as quasi-equity. Its value cannot be judged from that label or from the size of an announced envelope. The question is whether such capital is patient enough to let a supplier build and qualify additional capacity, finance the associated working-capital cycle and generate cash before material payment obligations fall due, and what it costs in future control over the company and its technology when those obligations finally do.