Circular Economy Startups

Marco transforms discarded coffee grounds from Parisian offices into cosmetic ingredients and biomaterials using supercritical CO2 extraction and green chemistry processes. The company produces natural cosmetic actives (OILCO, BUTTERCO, MARCO) with complete supply chain traceability and reduced carbon footprint.

1 investor

The Margam Green Energy Plant is a biomass power station in the UK that generates renewable energy by burning waste wood. It operates as part of the clean energy infrastructure sector, with fuel supplied under a long-term contract.

1 investor

Marine Metals operates a circular ship recycling and dismantling business, breaking down end-of-life vessels to recover high-quality scrap metal for sustainable steelmaking. The company develops specialized dismantling infrastructure and operates in the western Netherlands, targeting the maritime decommissioning and metals reuse market.

1 investor

Mass Magnetics manufactures high-performance neodymium-iron-boron rare-earth magnets in the United States from recycled and domestic feedstocks, using a rapid sintering process and machine learning to sort scrap by grade and chemistry. It targets defense and industrial buyers needing DFARS-compliant domestic magnets and also sells DFARS-compliant rare-earth alloys to domestic metallurgists.

1 investor

Material Evolution develops low-carbon cement using a proprietary alkali fusion process that operates at ambient temperatures, significantly reducing emissions compared to conventional cement production. The company serves architects, engineers, and construction firms seeking sustainable alternatives to traditional cement, using AI and machine learning to optimize material selection and manufacturing efficiency.

1 investor

Matorka operates a land-based, vertically integrated aquaculture business raising Arctic char in Iceland, harvesting to order with full traceability from egg to customer. It sells fresh, certified fish to seafood buyers and holds environmental, labour, and animal welfare certifications.

1 investor

Matsmart/Motatos is an online grocery retailer that sells surplus and near-expiry food and household products at reduced prices to reduce food waste. It operates across several European markets including Sweden, Germany, Finland, Austria, Denmark, and Switzerland.

1 investor

Matsmart is a Swedish online store that sells surplus and short-dated food, beverages, and household and beauty products at discounted prices to consumers. It offers items nearing their best-before date at reduced cost to reduce food waste.

1 investor

Johnson Matthey is a company specializing in platinum group metals (PGMs), applying, refining, and recycling these metals for customers across multiple industries. It provides related technologies and materials solutions and has a history spanning more than two centuries.

1 investor

Sunbelt Solomon supplies, designs, maintains, rents, repairs, recycles, and resells power-distribution equipment such as transformers, voltage regulators, reclosers, and switchgear. It serves utilities and industrial power customers through a national service center network offering new and remanufactured equipment.

1 investor

MBA Polymers recycles plastics from end-of-life durable goods such as computers, electronics, appliances, and automobiles, producing engineered plastics made from 100% post-consumer recycled material. Founded in 1997, it operates production units across Germany, Austria, China, India, and the United Kingdom.

1 investor

MDF Recovery develops technology that recovers and cleans high-quality wood fibres from waste MDF and particle board using a low-energy, low-water, chemical-free process that integrates into existing panelboard manufacturing lines. It serves the wood panel and industrial manufacturing industry, helping producers recycle end-of-life MDF and meet sustainability targets.

1 investor

MediSun Energy is a brine management company that converts desalination brine and industrial waste streams into usable resources using proprietary technologies such as Reverse Electrodialysis (RED) and CO₂ mineralization. It targets energy-intensive sectors including desalination and heavy industry, aiming to reduce their carbon footprint.

1 investor

BioResin develops bio-separation technology that upcycles agricultural byproducts such as acid whey, pea, and soy waste streams into edible "magnetic" fibers used to capture and purify proteins. Its products serve food and alternative-protein producers, including precision fermentation and plant-based applications, offering both a dual-upcycled fiber-protein hybrid ingredient and a food-grade high-purity processing aid.

1 investor

Mega-Inliner produces a patented bag-in-tank system (a recyclable food-grade plastic bag installed in its tank containers) for transporting non-hazardous bulk liquids such as beer, wine, juices, oils, chocolate, dairy, and chemicals. The system aims to prevent cross-contamination and reduce transport costs, water use, and CO2 emissions for producers and logistics operators.

1 investor

MEINE ERDE offers "Reerdigung", an ecological burial method that transforms a human body into fertile soil within 40 days using microorganisms. The company provides this natural burial form and related prearrangement services to individuals and funeral directors in Germany.

1 investor

Meknology provides a patented waste transformation system for beverage producers that converts spent grain, stillage, and wastewater into saleable byproducts including animal feed, biochar fertilizer, and potable water. The system reduces disposal costs and creates new revenue streams while helping producers meet environmental compliance standards.

1 investor

Mepal designs and sells household products such as leakproof storage boxes, lunch boxes with bento trays, drinking cups, pop-up bottles, and insulated travel mugs for everyday use at home, school, and on the go. The company positions its consumer goods around convenience and sustainability.

1 investor

Mercado Único is a B2B wholesale platform that connects surplus inventory from major fashion brands directly to small retailers, boutiques, and outlet stores seeking authentic, labeled merchandise for resale. The platform offers new, tagged items from premium brands at discounts of up to 75% with free shipping across Brazil.

1 investor

Meridian Waste provides curbside solid waste collection and removal services for residential and local customers, with schedule lookup and service alerts by zip code. It operates as a waste management company serving areas through local facilities.

1 investor

MetaCycler develops cost-effective bioplastics by using microbes to convert dairy and other agricultural and food waste into plastic materials. The company works within a circular bio-economy to produce biodegradable alternatives to petroleum-based plastics.

1 investor

Metalico is a ferrous and non-ferrous scrap metal processor serving customers across several U.S. states including New York, New Jersey, Ohio, Pennsylvania, West Virginia, and Mississippi. It operates in the recycling and materials processing industry as a member of the YeChiu Group.

1 investor

Metaloop operates an all-in-one platform and portal for buying, selling, and managing metal scrap, connecting industrial manufacturers with recyclers and smelters. It handles pricing, logistics, financing, and recycling of secondary raw materials, offering matchmaking technology and centralized visibility over local and international transactions.

1 investor

Metastable Materials recycles lithium-ion batteries end-to-end using its Integrated Carbothermal Reduction process, which recovers metals without chemicals or energy-intensive methods. It sells recovered precious metals in standard commodity forms and provides heat- and fire-resistant packaging for safe battery-waste logistics.

1 investor