Response to non-infringement claim

FOR IMMEDIATE RELEASE 27 November 2025

Nanoco Group PLC

("Nanoco", the "Group", or the "Company")

Response to non-infringement claim

Nanoco Group plc (LSE: NANO), notes that Shoei Chemical Inc. and Shoei Electronic Materials, Inc. (together, "Shoei") has issued proceedings in the US District Court for the Eastern District of Virginia seeking a declaratory judgement of non-infringement of certain of Nanoco's patents.

Shoei acquired substantially all of the assets from Nanosys, Inc. ("Nanosys"), another manufacturer of quantum dots, for an undisclosed sum in September 2023.

The Board of Nanoco feels it appropriate to emphasise that this claim has been filed by Shoei in order to establish whether Shoei has or has not been infringing a number of Nanoco's patents. The Group is evaluating next steps with legal counsel and will update shareholders when possible.

- Ends -

Nanoco Group plc:

Dmitry Shashkov, CEO +44 (0)1928 761 404

Liam Gray, CFO & Company Secretary

Sodali & Co (Public Relations)

Elly Williamson +44 (0)79 3535 1934

Pete Lambie

Oliver Banks

[email protected]

Cavendish Capital Markets Limited (Financial Adviser and Corporate Broker):

Ed Frisby / George Lawson (Corporate Finance) +44 (0) 20 7220 0500

Tim Redfern (Corporate Broking)

Jasper Berry (Sales)

CDX Advisors (Financial Adviser):

Steven Foland +1 415 425 2224

Steve Month

Patrick Foley 

Notes for editors:

About Nanoco Group plc

Nanoco (LSE: NANO) is a world leader in the development and manufacture of cadmium-free quantum dots and other specific nanomaterials emanating from its technology platform. In particular, Nanoco is a nanomaterial production and licensing group, specialising in the production of its patented cadmium free quantum dots (CFQD® materials) and other patented nanomaterials for use in the electronics industries. Founded in 2001 and headquartered in Runcorn, UK, Nanoco continues to build out a world-class, patent-protected IP portfolio alongside its existing scaled up production facilities for commercial orders.

Nanomaterials are materials with dimensions typically in the range 1 - 100 nm. Nanomaterials have a range of useful properties, including optical and electronic. Quantum dots are a subclass of nanomaterial that have size-dependent optical and electronic properties. Within the sphere of quantum dots, the Group exploits different characteristics of the quantum dots to target different performance criteria that are attractive to specific markets or end-user applications such as the Sensor, Electronics and Display markets. Nanoco's CFQD® quantum dots are free of cadmium and other toxic heavy metals, and can be tuned to emit light at different wavelengths across the visible and infrared spectrum, rendering them useful for a wide range of display applications. Nanoco's HEATWAVE® quantum dots can be tuned to absorb light at different wavelengths across the near-infrared spectra, rendering them useful for applications including cameras and image sensors.

Nanoco is listed on the Main Market of the London Stock Exchange, holds the LSE's Green Economy Mark, and trades under the ticker symbol NANO. For further information please visit: www.nanocotechnologies.com