Jonathan Sieff

Polymateria Ltd. is a British company that aims to tackle the plastic pollution crisis by advancing science. The company is based in London, UK, and was founded in 2015 by Jonathan Sieff. Polymateria is the first company in the world to scientifically prove that it is possible to return the most likely sources of fugitive or littered plastics to nature without creating microplastics, harming the natural environment, or interfering with recycling streams at scale. The company has partnerships with some of the biggest technical partners in the world, such as Clariant, Avient, and Indorama Ventures. Polymateria's technology was recently featured in National Geographic magazine, and the company is a founding signatory of HRH The Prince of Wales' Terra Carta (Earth Charter) established under the Sustainable Markets Initiative. The CEO is Niall Dunne.