Related Party Transaction - Lease Extension

New York, Belfast and London, 16 April 2026 - Diaceutics PLC (AIM: DXRX), a leading technology and solutions provider to the pharma and biotech industry, announces that it has agreed an extension to its existing property lease agreement for its Belfast headquarters with O'Connor & McCann Limited (the 'Lessor'). This constitutes a related party transaction under AIM Rule 13. The Lessor continues to be a related party of the Company by virtue of Peter Keeling, Non-Executive Chair of Diaceutics, being the sole director of the Lessor. Persons closely associated with Peter Keeling hold 13.3% of the Lessor.

Diaceutics (the 'Company') entered into a lease with the Lessor in 2021 at an annual rent of £195,000, which was disclosed at the time as a related party transaction. The lease had a ten-year term (ending in August 2031) with a break clause exercisable after five years at which time the rent would be subject to open market rent review.

Following negotiations, Diaceutics has agreed with the Lessor to extend the lease term by five years from August 2031 to August 2036, securing the longer-term future of the Company's headquarters in Northern Ireland. With effect from August 2026, the annual rent will increase to £235,000, with an open market rent review in August 2031 and no provision to terminate the lease early. All other material provisions of the lease, including the Company's right to sub‑lease the premises, remain unchanged.

The directors of the Company (excluding Peter Keeling), having consulted with the Company's Nominated Adviser, consider that the terms of the lease extension are fair and reasonable insofar as the Company's shareholders are concerned.