News alert from Avacta Group

27 March 2023

Avacta Group plc

("Avacta" or the "Company" or, together with its subsidiary undertakings, the "Group")

Avacta to present pre-clinical data on AVA3996 at the American Association for Cancer Research Annual Meeting

Avacta Group plc (AIM: AVCT), a life sciences company developing innovative, targeted oncology drugs and powerful diagnostics, announces it will present a poster entitled 'AVA3996, a novel pre|CISION™ medicine, targeted to the tumor microenvironment via Fibroblast Activation Protein-alpha (FAP-a) mediated cleavage', at the American Association for Cancer Research (AACR) 2023 Annual Meeting, taking place at Orange County Convention Center, Orlando, Florida on 16 April.

The poster describes the data and pre-clinical rationale for the further development and disease positioning of the Company's second pre|CISION™ candidate, AVA3996, a tumour microenvironment activated proteasome inhibitor. AVA3996 utilises Avacta's pre|CISION™ platform to improve the therapeutic index and therefore utility of proteasome inhibitors in tumours with high FAP levels, including both solid and haematological tumours. AVA3996 has the potential to deliver efficacious levels of the proteasome inhibitor warhead directly to the tumour microenvironment while reducing systemic exposure and hence associated toxicities, such as peripheral neuropathy.

Attending the conference from Avacta will beFiona McLaughlin - Chief Scientific Officer, Neil Bell - Chief Development Officer, David Jones - VP Biology and Francis Wilson - VP Chemistry.

The abstract is available via the AACR annual meeting website, here: https://www.abstractsonline.com/pp8/#!/10828/presentation/2606

Copies of the poster will be available on Avacta's website following the conference at: https://avacta.com/about/resources/posters/

Alastair Smith, Avacta Chief Executive Officer, will provide a video presentation overview for investors examining the data presented in the poster. This will be available on 17^th April at https://avacta.com/investors/documents-presentations/.

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For further information from Avacta Group plc, please contact:

Avacta Group plc

Alastair Smith, Chief Executive Officer

Tony Gardiner, Chief Financial Officer

Michael Vinegrad, Group Communications Director

Tel: +44 (0) 1904 21 7070

www.avacta.com

Stifel Nicolaus Europe Limited(Nomad and Broker)

Nicholas Moore / Nick Adams / Samira Essebiyea / Nick Harland / Dhiren Suares / William Palmer-Brown

Tel: +44 (0) 207 710 7600

www.stifel.com

FTI Consulting (Financial Media and IR)

Simon Conway / Alex Shaw/ George Kendrick

Tel: +44(0) 203 727 1000

[email protected]

Zyme Communications(Trade and Regional Media)

Lily Jeffery

Tel: +44 (0)7891 477 378

[email protected]

About Avacta Group plc - www.avacta.com

Avacta Group plc is a life sciences company working to improve people's health and well-being through innovative oncology drugs and powerful diagnostics. Operating through two divisions, Diagnostics and Therapeutics, the Group's mission is to provide professionals and consumers with solutions that improve healthcare, fitness and well-being.

Avacta'sTherapeutics Division , a clinical stage oncology drug innovator, is building a wholly owned pipeline of novel Affimer^® immunotherapies and pre|CISION™ tumour targeted chemotherapies. This approach is designed to address the lack of a durable response to current cancer immunotherapies experienced by most patients and reduce the severe systemic toxicities caused by chemotherapies. There are five programmes in the pipeline as well as several global research collaborations and licensing partnerships. Avacta's lead programme, AVA6000, is a pre|CISION™ tumour-targeted form of the established chemotherapy doxorubicin. AVA6000 is in Phase I clinical trials in patients with locally advanced or metastatic selected solid tumours.

The Affimer^® platform is an alternative to antibodies that has been designed to address many of the drawbacks of antibodies which, despite their shortcomings, currently dominate the immuno-diagnostics and immuno-therapeutics markets.

The pre|CISION™ tumour targeting platform can be used to modify a chemotherapy in order to selectively release the active drug in tumour tissue thereby reducing the systemic exposure that causes damage to healthy tissues. pre|CISION™ modified chemotherapies are designed to reduce the side effects and improve the overall safety and therapeutic potential of these powerful anti-cancer treatments.

Avacta'sDiagnostics Division develops and supplies a broad range of in-vitro diagnostic (IVD) solutions. The Division is growing rapidly through an M&A strategy to deliver a global scale IVD business providing market leading solutions for healthcare professionals and consumers to inform treatment and monitor health and well-being. In October 2022, Avacta acquired Launch Diagnostics which serves the hospital pathology laboratory market in the UK and Europe. Avacta Diagnostic's research and development centre in Wetherby, UK uses its proprietary Affimer^® platform to differentiate immunodiagnostic products to provide marketing leading performance.

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