17 January 2023

HydrogenOne Capital Growth plc

Notice of Capital Markets Day

HydrogenOne Capital Growth plc ("HydrogenOne" or the "Company"), the first London-listed fund investing in clean hydrogen for a positive environmental impact, is pleased to announce that its Capital Markets Day will now be held on Thursday 23 February 2023 at etc.venues, 8 Fenchurch Place, London, EC3M 4PB. The event will start at 9.00am GMT.

This is an in-person event for analysts and institutional investors. For those unable to join in person, there will be an option to attend virtually. Virtual participants will also be able to participate in the Q&A sessions. Recordings of the presentations and the corresponding slides will be available on the Company's website after the event.

The objective of the event is to provide analysts and institutional investors with a detailed understanding of HydrogenOne's private portfolio, drivers for the Company's long-term growth and sustainability efforts. CEOs and senior managers from HydrogenOne's private portfolio will give a short presentation on their respective businesses before participating in a panel Q&A.

To register to attend the Capital Markets Day, and for further details, please contact: enquiries@hydrogenonecapital.com.

No new material information will be provided.

The Company's LEI is 213800PMTT98U879SF45.

For further information, please visit www.hydrogenonecapitalgrowthplc.com or contact:

About HydrogenOne:

HydrogenOne is the first London-listed hydrogen fund investing in clean hydrogen for a positive environmental impact. The Company was launched in 2021 with an investment objective to deliver an attractive level of capital growth by investing in a diversified portfolio of hydrogen and complementary hydrogen focussed assets. INEOS Energy is a strategic investor in HydrogenOne. The Company is listed on the London Stock Exchange's main market (ticker code: HGEN). The Company is an Article 9 climate impact fund with an ESG policy integrated in investment decisions and asset monitoring.

IMPORTANT NOTICE

This announcement does not constitute an offer to sell, or the solicitation of an offer to acquire or subscribe for, shares in the Company in any jurisdiction. The distribution of this announcement outside the UK may be restricted by law. No action has been taken by the Company that would permit possession of this announcement in any jurisdiction outside the UK where action for that purpose is required. Persons outside the UK who come into possession of this announcement should inform themselves about the distribution of this announcement in their particular jurisdiction.