Carbios Wins Lender Backing for Longlaville as Recycled Polyester Passes Factory Test

Carbios has cleared two of the hurdles that have kept its share price under pressure all year, securing preliminary approval from most of the lenders backing its Longlaville plant while proving that its enzymatic recycling process can turn mixed textile waste into wearable polyester on real production lines.

The French biotech said credit committees representing a majority of the project's lenders have signed off on the financing package. Talks with export credit agencies and prospective equity partners are still running, but the lender approvals remove a significant piece of execution risk from the company's flagship industrial project in northeastern France.

A beverage deal that would anchor the plant

Underpinning the financing case is a commercial agreement with a major player in the beverage industry that Carbios says is in the final stages of negotiation. Signing it would lift pre-sales to 60% of the nominal capacity at Longlaville — a level the company views as sufficient to support the debt package. Until that contract is inked, however, the plant's economics rest on commitments that have yet to become binding.

The company's balance sheet gives it room to wait, though not indefinitely. Carbios reported first-half 2026 results on 24 September, showing operating expenses down 19% year on year. The net loss came in at EUR 9.4 million, with an operating shortfall of EUR 11.8 million, while cash and equivalents stood at EUR 48 million as of 30 June 2026. Management says that cushion covers ongoing operating costs for more than the next twelve months, easing immediate refinancing pressure even as preparations for the heavy Longlaville investment continue.

Textile breakthrough moves beyond the lab

While the financing work proceeds, Carbios has delivered a technological milestone that opens a second market beyond bottles and transparent packaging. Together with the Fiber-to-Fiber consortium — whose members include Patagonia, PUMA and Salomon — the company produced T-shirts from recycled polyester on European manufacturing lines. The feedstock was complex textile and plastic waste, the kind of mixed material that has historically defeated conventional recycling methods.

According to Carbios, the resulting EnzyTex polyester matched the properties of virgin polyester made from fossil feedstocks. Running the process on existing European production equipment matters as much as the chemistry itself: it means the textile industry can adopt the technology without building entirely new processing capacity from scratch, lowering the barrier to entry for brands under mounting regulatory and sustainability pressure.

The involvement of names like PUMA and Patagonia is arguably the most valuable part of the announcement. A technology developer can perfect a process, but without offtake commitments and a willingness among brand owners to reconfigure their supply chains, even the best innovation goes nowhere.

Market skepticism persists

Investors have yet to be convinced. The stock fell 8.9% on Thursday to close at EUR 5.42, extending a decline that has reached 51% since the start of the year. The cautious reception reflects a simple reality: the capital market is demanding hard evidence of commercial viability, not just working pilot runs.

Carbios has now shown that its enzymatic process works at industrial scale for textiles, removing a major execution risk from the technology story. What remains is the commercial finish — signing the beverage contract, closing the Longlaville financing without gaps and converting technical proof into revenue. Until those pieces fall into place, the shares are likely to keep trading on promise rather than performance.