For immediate release

Nanoco Group PLC

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

Transaction in Own Shares

and

Total Voting Rights

Nanoco Group plc (LSE: NANO), a world leader in the development and manufacture of cadmium-free quantum dots and other specific nanomaterials emanating from its technology platform, announces that on 18^th April 2024, it purchased the following number of its ordinary shares of 10.0 pence each on the London Stock Exchange in accordance with the terms of the share buyback programme announced on 11^th April 2024 (the "Buyback Programme").

Nanoco intends to cancel all of the purchased ordinary shares.

Following the cancellation of the ordinary shares purchased above, the Company will have 211,125,004 Ordinary Shares in issue including 13,762,222 Ordinary Shares held in treasury. Therefore, the total number of voting rights in the Company will be 197,362,782 and this figure may be used by Shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules.

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 (as incorporated into UK domestic law by the European Union (Withdrawal) Act 2018), the table below contains detailed information of the individual trades made by Cavendish Securities plc on behalf of the Company as part of the Buyback Programme.

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About Nanoco Group plc

Nanoco (LSE: NANO) is a nanomaterial production and licensing company, specialising in the production of its patented cadmium free quantum dots (CFQD®) 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 the scaling of the production 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 spectrum, 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