Celtic Renewables’ patented technology converts low-value biological residues into high-value, low-carbon sustainable chemicals & biofuels. Construction of their flagship plant is complete & their first customer; Caldic, who turned over almost €900m last year, is on board. Over £35m in funding raised to date.

  • Construction of flagship biorefinery in Scotland is complete
  • 1st customer onboard; a global distributor for food & pharma sectors
  • Products independently verified as carbon negative compared to petrochemicals
  • £3.68m raised from 2,440 investors on Crowdcube in Nov 2020


At Celtic Renewables, our proposition is simple: we take residual by-products, initially from the whisky industry, which are produced in large volumes & problematic to dispose of and use our internationally patented process to convert them into high-value low carbon products, namely Acetone, Butanol, Ethanol & animal feed; markets set to be worth £130bn by 2025. These products play an important role in our daily lives & are used in pharmaceuticals, cosmetics, food, hygiene products and advanced biofuels.

Since our raise in November 2020:

  • We’ve completed construction of our flagship biorefinery in Grangemouth, Scotland & have now entered the production phase.
  • Our first customer, Caldic, a major global distributor for the food, pharma & personal care industries (approx. €900m 2020 revenue), has signed a 3-year multi million pound contract and will distribute >50% of the solvents produced by the 1st plant, we have a number of LOIs in place with other global chemical companies
  • Our biochemicals have been independently verified as carbon negative compared to petrochemical equivalents over their lifetime

We are now raising investment to begin to build & launch our next, larger-scale plants with discussions well underway with a number of multinational companies, including a major F&B company that would provide brand new types of feedstocks, on which we’ve held successful trials.


Professor Martin Tangney OBE - Founder and President

An award-winning innovator (including the IChemE International Innovator of the Year), Martin is the inventor of the Celtic Renewables process - his profile, domain expertise and connections are fundamental to driving forward the commercialisation of the process technology and to the success of Celtic Renewables.

Mark Simmers - CEO

Mark is an experienced entrepreneur with many years of international experience in commercialisation, sales, and marketing. Mark is a graduate of the prestigious Saltire Foundation Global Entrepreneurial Fellowship Programme and is a trustee of the Entrepreneurial Scotland Foundation

John Stevenson - Managing Director

John is a highly experienced Projects Director. Most recently John was leading the expansion project of one of Scotland’s largest distilleries, Glenfiddich, and prior to that led the construction and commissioning of the new Tullamore Distillery.

Claire Treacy - CFO

Claire is a senior finance leader with significant experience in private equity backed and listed businesses, including KPMG and a number of real estate investment firms. A graduate of Trinity College Dublin, Claire is also a Board Member of Social Investment Scotland.

The full profiles of our senior leadership team can be found in our pitch documents.