15 May 2023

LEI: 213800IE1PPREDIIZB62

Atrato Onsite Energy plc

(the "Company")

Notice of interim results

Atrato Onsite Energy plc (LSE: ROOF), the investment company focusing on clean energy generation will announce its results for the six-month period ended 31 March 2023 on Tuesday 13 June 2023.

An in-person presentation for analysts will be held at 8.30am on the day of results at the offices of Berenberg, 60 Threadneedle Street, London, EC2R 8HP. The presentation will also be available to join via a webcast with a Q&A function.

Those wishing to attend in person or virtually via the webcast should contact Kaso Legg Communications using the email address below.

The results, analyst presentation and any associated documents will also be available on the Company's website in the Investor Centre.

ENQUIRIES

Notes to Editors

Atrato Onsite Energy plc (LSE: ROOF) is an investment company focused on clean energy generation, providing renewable energy capacity with 100% carbon traceability to industrial and commercial counterparties. The Company focuses on UK commercial solar, helping its corporate clients achieve net zero and reduce their energy bills. It raised £150 million in a significantly oversubscribed IPO in November 2021. Atrato Onsite Energy plc provides investors with attractive capital growth and secure, index-linked income, targeting a 5% dividend yield and a total shareholder return of 8 - 10%⁽¹⁾. Its shares were admitted to trading on the premium segment of the Main Market of the London Stock Exchange on 23 November 2021. Atrato Partners Limited is the Company's investment adviser.

Further information is available on the Company's website, www.atratoroof.com.

(1) The target dividend set out above is a target and is not a profit forecast. There can be no assurance that this target can or will be met. This target has been developed based upon assumptions with respect to future business decisions and conditions that are subject to change, including the Company's execution of its investment objective and strategies, as well as growth in the sector and markets in which the Company operates. As a result, the Company's actual results may vary from the targets set out above and those variations may be material. The target dividend yield reflects the IPO price of 100 pence per Ordinary Share.