Compliance with Market Abuse Regulation

5 May 2026

GCP Infrastructure Investments Limited

(the "Company" of "GCP Infra")

LEI: 213800W64MNATSIV5Z47

Compliance with Market Abuse Regulation

The Company advises that it is in a closed period (in accordance with the provisions of the Market Abuse Regulation) in relation to the announcement of the Company's Half Year Report and Financial Statements for the period ended 31 March 2026.

The Company confirms that all inside information (as defined in the Market Abuse Regulation) which the Directors and the Company may have held has been announced to the market. Accordingly, in the absence of any new undisclosed inside information arising, the Company is not prohibited from repurchasing its own shares, during the period prior to release of the Half Year Report and Financial Statements for the period ended 31 March 2026. The Board anticipates that the Half Year Report and Financial Statements will be announced to the market on or around Thursday, 4 June 2026.

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Notes to Editors

About GCP Infra

GCP Infra is a closed-ended investment company and FTSE-250 constituent whose shares are traded on the main market of the London Stock Exchange. Its objective is to provide shareholders with regular, sustained, long-term distributions and to preserve capital over the long term by generating exposure to UK infrastructure debt and related and/or similar assets.

The Company primarily targets investments in infrastructure projects with long term, public sector-backed, availability-based revenues. Where possible, investments are structured to benefit from partial inflation protection. GCP Infra is advised by Gravis Capital Management Limited.

GCP Infra has been awarded with the London Stock Exchange's Green Economy Mark in recognition of its contribution to positive environmental outcomes.