Exercise of Options

10 June 2025

ONDINE BIOMEDICAL INC.

("Ondine Biomedical", "Ondine", or the "Company")

Exercise of Options

Ondine Biomedical Inc. (LON: OBI), a Canadian life sciences company pioneering light-activated antimicrobial treatments, announces that it has received notices of exercise in respect of options to subscribe for 200,000 new ordinary shares of no par value each in the capital of the Company ("Ordinary Shares") (the "Option Shares") at an exercise price of CA$0.01 per Option Share. 

Application has been made for the Option Shares, which will rank pari passu with the Company's existing Ordinary Shares, to be admitted to trading on AIM ("Admission"). It is expected that Admission will become effective and that dealings in the Option Shares will commence on or around AIM at 8.00 a.m. on 13 June 2025. Following Admission, the Company's total issued share capital will consist of 443,433,174 Ordinary Shares. As the Company does not hold any shares in Treasury, this figure may be used by shareholders in the Company as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the share capital of the Company following Admission.

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About Ondine Biomedical Inc.

Ondine Biomedical Inc. is a Canadian life sciences company and leader in light-activated antimicrobial therapies ('photodisinfection') for the prevention and treatment of infections, including those caused by multidrug-resistant organisms. Ondine has a pipeline of investigational products, based on its proprietary photodisinfection technology, in various stages of development.

Ondine's nasal photodisinfection system has a CE mark in Europe and is approved in Canada, Australia, Mexico and several other countries under the name Steriwave®. In the US, it has been granted Qualified Infectious Disease Product designation and Fast Track status by the FDA and is currently undergoing clinical trials for regulatory approval. Products beyond nasal photodisinfection include therapies for a variety of medical indications such as chronic sinusitis, ventilator-associated pneumonia, burns and other indications.