22 May 2026

Catenai PLC

("Catenai", the "Company")

Klarian Update and Webinar

Catenai PLC (AIM: CTAI), the AIM quoted provider of digital media and technology services, announces an update relating to Klarian Ltd ("Klarian"), a company to which Catenai provided a £450,000 unsecured convertible loan note facility ("CLN") as per the announcement of 25 April 2024.

Further to the announcements on 7 April 2025, 30 June 2025, 5 January 2026 and 20 April 2026, the Company has entered into a further extension agreement ("Extension Agreement") with Klarian. Under the terms of the Extension Agreement, Klarian will repay Catenai £699,160 due under the CLN and related fees as at 1 April 2026 (the "Repayment"), by 1 July 2026 (the "Repayment Date") together with an additional fee of 3% per month (or part thereof) which will accrue on the outstanding balance until repayment. There can be no certainty that Klarian will complete the Repayment in full by the Repayment Date, however; Klarian has confirmed it will endeavour to make an initial repayment on or before 1 July 2026.

Klarian has also informed Catenai that it has entered into a collaborative pilot project with an existing MOU partner that provides technology solutions to companies operating in the energy and natural resources sectors (the "Project"). The aim of the Project is to demonstrate the value of Klarian's physics-based virtual sensor technology for offshore pipeline assets, targeting select customers of the MOU partner that own or operate offshore production infrastructure, with the objective of integrating Klarian's virtual sensors (estimating pressure, temperature, flow and related variables) into a broader data ecosystem. As previously disclosed on 20 April 2026, Klarian has made significant advancements with its commercial sales pipeline, which now exceeds £5 million and is progressing discussions with investors.

To present further details and answer questions on Klarian's latest developments, the company will hold an investor webinar with Andrew Garner, Chairman of Klarian and Gary Chandler, Klarian's Chief Technology Officer, via the Investor Meet Company platform at 10.00 a.m. on 5 June 2026.

The presentation is open to all existing and potential investors. Questions can be submitted pre-event via your Investor Meet Company dashboard up until 9:00 a.m. the day before the meeting or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet Catenai plc via: https://www.investormeetcompany.com/catenai-plc/register.

Investors who already follow Catenai plc on the Investor Meet Company platform will automatically be invited.

This announcement contains inside information for the purposes of the UK Market Abuse Regulation. The person who arranged for release of this announcement on behalf of the Company was John Farthing, Interim Chief Executive Officer of the Company and the Directors of the Company are responsible for the release of this announcement.

For further information please contact:

Notes to Editors:

About Catenai PLC

Catenai is an AIM quoted provider of digital media and technology services. The Company has an experienced IT team of project managers and integrators who have deployed systems across corporate, government and educational sectors.

www.catenaiplc.com

Caution regarding forward looking statements

Certain statements in this announcement, are, or may be deemed to be, forward looking statements. Forward looking statements are identified by their use of terms and phrases such as ''believe'', ''could'', "should" ''envisage'', ''estimate'', ''intend'', ''may'', ''plan'', ''potentially'', "expect", ''will'' or the negative of those, variations or comparable expressions, including references to assumptions. These forward looking statements are not based on historical facts but rather on the Directors' current expectations and assumptions regarding the Company's future growth, results of operations, performance, future capital and other expenditures (including the amount, nature and sources of funding thereof), competitive advantages, business prospects and opportunities. Such forward looking statements reflect the Directors' current beliefs and assumptions and are based on information currently available to the Directors.