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30 January 2026

Fusion Antibodies plc

("Fusion" or the "Company")

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Fusion Antibodies plc (AIM: FAB), specialists in pre-clinical antibody discovery, engineering and supply for both therapeutic drug and diagnostic applications, announces that the issued share capital of the Company at the date of this announcement comprises 125,021,878 ordinary shares of 4 pence each with one voting right per share ("Ordinary Shares"). The Company does not hold any Ordinary Shares in treasury. Therefore, the total number of Ordinary Shares and voting rights in the Company is 125,021,878.

The above 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 under the FCA's Disclosure Guidance and Transparency Rules.

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About Fusion Antibodies plc

Fusion Antibodies plc is a Contract Research Organisation (CRO) located in Northern Ireland that offers an integrated end-to-end range of antibody discovery, engineering and expression services for all stages of human therapeutic, veterinary therapeutic and diagnostic antibody development.

The range of services offered includes antibody discovery/generation, development, characterisation, optimisation, and small-scale production. In addition, the Company also offers antigen design, antigen expression, antibody purification and sequencing, antibody humanisation using Fusion's proprietary CDRxTM platform and cell line development, producing antibody generating stable cell lines optimised for use downstream by the customer to produce material for clinical trials. Since 2012, the Company has successfully sequenced and expressed many thousands of antibodies and successfully completed over 290 humanisation projects for its international customer base, which has included eight of the top 10 global pharmaceutical companies by revenue.

At every stage, our client's vision is central to how we work in combining the latest technological advances with cutting edge science. In this work our world-class discovery (OptiMAL® and OptiPhageTM), humanization and antibody optimization platforms harness the power of natural somatic hypermutation (SHM) to ensure the best molecule goes to the clinic.

Fusion Antibodies' growth strategy is based on enabling Pharma and Biotech companies get to the clinic more effectively, using molecules with optimized therapeutic profile and enhanced potential for successful development and approval and, ultimately, on speeding up the drug discovery and development process. Our Integrated Therapeutic Antibody Services ("ITA") offering enhances the efficiency of this process by providing a continuous service offering from as early as target nomination to as far as a stable cell line. Fusion's use of SHM to create a fully human antibody library to capture the human antibody repertoire addresses a continuing market need in antibody discovery. 

Fusion Antibodies' emphasis on antibody therapeutics is based on the size and growth rate in the sector, with the market valued at $253 billion in 2024 and forecast to reach nearly $500 billion by 2029. From 2020 to 2024 there have been 63 antibody therapeutics granted approval in either the USA or the EU, of which 30 were for cancer and there were nine antibodies each with sales of more than $5 billion in 2023.

While therapeutic antibodies are our primary focus, all the services are directly applicable to the Diagnostic sector and also the new, more embryonic veterinary markets and diversification into these markets gives the Company further growth opportunities.