Participated · Equity · Mar 2026

Leviathan Dynamics designs compact, high-speed centrifugal compressors embedded in modular systems that enable low-pressure water boiling and heat recovery for industrial cooling and wastewater concentration. Its patented compressors (one to two wheels, ~40 cm, 15–20 kg) operate under vacuum with steam and are integrated into chillers, heat pumps and an evapo-concentrator currently commercialized and at TRL 7. The evapo-concentrator can recover up to 80% of industrial effluent water and can reduce effluent volumes by up to fivefold, while the systems claim roughly 30% lower energy consumption versus conventional solutions. The company operates a 1,000 m2 production unit in La Courneuve and had a team of 18 employees at the time of reporting. Leviathan plans to scale manufacturing to produce 600 machines by 2030, expand its workforce to 80–100 people, and develop higher-capacity 100 kW compressors to serve larger surfaces and data-center use cases. Its technology has been tested with clients in pharma, chemicals and other industries where gentle low-temperature processing preserves biologicals and enables valorization of concentrated residues.

Participated · Equity · Feb 2026

Founded in 2018 in Aix-en-Provence, Entent is a deep-tech company focused on recovering waste heat between 60 °C and 150 °C. Its core product, Pulse, replaces the traditional turbine with a piston mechanism, enabling the conversion of roughly 10 % of captured low-grade heat into electricity. The company plans to install its first industrial demonstrator on a Michelin site in Q1 2026 and targets deploying several dozen units within the next three years. Management views 2024 as a pivotal year to secure initial contracts and move toward full industrialisation. Entent ultimately intends to pursue a larger follow-on fundraise to scale manufacturing. The €2.4 million capital injection announced in January 2024 is the firm’s first external financing and will fund product industrialisation and early deployments.

Led · Equity · Jan 2026

Founded in 2019 and based in Avelin, France, Monomeris Chemicals spent five years developing a rapid depolymerization technology that breaks down 100 % of plastic waste—including "orphan" plastics normally sent to landfill or incineration—into base monomers such as ethylene, propylene and butenes. The compact, containerized system can be integrated into existing industrial lines, processing roughly 60 kg of plastic per hour (about one tonne per day) with reaction times of under a minute and requiring only electricity for operation. Monomeris purchases the recovered monomers from its recycling customers and resells them to chemical-industry buyers, positioning itself as an intermediary between the recycling and chemicals sectors. The company claims the monomers are chemically identical to petro-derived equivalents, opening applications from new plastic production to pharmaceuticals like paracetamol. It advertises a four-year return on investment for recyclers and plans to complete its first commercial deliveries in 2026. An in-house industrial site has been established for assembling the units, and early international demand has been identified in India, Africa and the Middle East. The startup has not disclosed current revenue or detailed financial forecasts.

Led · Equity · Nov 2025

Green Spot Technologies develops and manufactures fermented, upcycled ingredients that can partially or fully replace cocoa in a variety of recipes. Using solid-state fermentation, the company transforms plant-based raw materials such as fava beans, grape pomace and other local fibers into powders, fillings and chocolate-style chips marketed under its new MILATEA brand. These ingredients are positioned to lower cost and deliver up to an 80 % reduction in CO₂e emissions, providing customers with a measurable Scope 3 footprint benefit. Production currently takes place at the firm’s facility in Carpentras, France, and the newly raised capital will allow it to expand output ten-fold—from 100 t to 1,000 t per year. The company plans to deepen its presence across bakery, pastry and confectionery markets while collaborating with chefs, researchers and industrial partners to make “sustainable indulgence” scalable. Most MILATEA products are vegan, with plant-based alternatives available for any that are not.

Participated · Equity · Oct 2025

Arkéon Energy is a Bidart-based cleantech startup that has created a “thésauthermie” system combining heat-pump technology with on-board thermal storage to cut carbon emissions from building heating. The device stores heat when power is cheapest or renewable and releases it on demand, positioning itself as an alternative to conventional heat pumps. Founded by Théo Granger and Colin Léti, the company has already installed several units in real-world settings. Target customers include both new construction projects and retrofit markets seeking lower energy bills and emissions. With new funds, Arkéon Energy aims to scale from pilot production to full industrial manufacturing of its equipment. The financing will also support continued R&D and commercial expansion. The article did not disclose revenue, user numbers, or other operating metrics.