9 August 2023

Dianomi plc

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

AIM Rule 17 Disclosure

Dianomi, a leading provider of native digital advertising services to premium clients in the Business, Finance and Lifestyle sectors, announces the following disclosure in relation to Matthew Singh, Non-executive Director of the Company, pursuant to AIM Rule 17 and Schedule 2(g) of the AIM Rules for Companies.

F (Realisations) 2023 Limited, a private company, entered administration in May 2023. Matthew Singh was a non-executive director of the business from 5 September 2018 to 15 May 2023.

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About Dianomi

Dianomi, established in 2003, is a leading provider of native digital advertising services to premium clients in the Financial Services and Business sectors. The Group operates from its offices in London, New York and Sydney. The Group enables premium brands to deliver native advertisements to a targeted audience on the desktop and mobile websites, mobile and tablet applications of premium publishers. It provides over 400 advertisers, including blue chip names such as abrdn, Invesco and Baillie Gifford, with access to an international audience of over 400 million devices per month through its partnerships with over 300 premium publishers of business and finance content, including blue chip names such as Reuters, Bloomberg and WSJ. Adverts served are contextually relevant to the content of the webpages on which they appear and mirror the style of the page, which enhances reader engagement. http://www.dianomi.com.