CALIX LIMITED — Capital/Financing Update 2022

May 18, 2022

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19[th] May, 2022

Calix confirms receipt of $5.19m R&D tax incentive

Sydney, Australia | 19[th] May, 2022 – Australian environmental technology company Calix Limited (ASX: CXL) (“Calix” or “the Company”) confirms that it has received a payment of $5.19m from the Australian government associated with its R&D tax incentive claim for the 2020/2021 financial year.

The Company has successfully developed world-leading carbon capture technology for application in emissions intensive industries such as cement and lime. The development of this technology has been supported by industry partners in Europe as well as the European - Commission, with the Calix-led LEILAC-1 and LEILAC-2 projects (https://www.project leilac.eu/), where we are working with industrial majors such as HeidelbergCement, Cemex, Tarmac, Lhoist, Engie and Cimpor. We have also recently announced cement and lime projects being developed in Australia with Boral, where a grant of $30m was announced on May 16, 2022, and Adbri. Calix looks forward to continuing its technology development with local industry, institutions and government in emissions abatement and is pleased to be a participant in the “Heavy Industry Low-carbon Transition (HILT) Co-operative Research Centre (CRC)” (https://www.hiltcrc.com.au/ ).

Calix is also developing multiple other applications of our technology into:

• Advanced Battery Materials, where we are leading the CRC-P for Advanced Battery Materials, and are a participant in the Future Battery Industries CRC (https://fbicrc.com.au/participants/ ) and StorEnergy Australian Research Council Linkage program (https://www.storenergy.com.au/ );

• Sustainable processing, where we recently announced $20m in grant support for a lithium salt project with Pilbara Minerals Limited (ASX:PLS), as well as developing the technology into low emissions calcined clays, iron and steel, magnesia and alumina;

• • Biotech, where we recently announced our participation in Solving Antimicrobial Resistance in Agribusiness, Food and Environments (SAAFE) Cooperative Research Centre (CRC), with $34.5m in government support.

This announcement has been authorised for release to the ASX by:-

Phil Hodgson Managing Director and CEO Calix Limited 9-11 Bridge Street Pymble NSW 2073 Ph +61 2 8199 7400

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About Calix

Calix is a team of dedicated people who are urgently developing great businesses, leveraging our patented technology, that deliver positive global impact.

The core technology is being used to develop more environmentally-friendly solutions for water treatment, CO2 mitigation, biotechnology, advanced batteries, and more sustainable mineral and chemical processing.

Calix develops its technology via a global network of research and development collaborations, including governments, research institutes and universities, some of world’s largest companies, and a growing customer base and distributor network for its commercialised products and processes.

Because there’s only one Earth – Mars is for Quitters.

Website: https://www.calix.global/ Twitter: @CalixLimited YouTube: CalixLimited

For more information:

Phil Hodgson Managing Director and CEO phodgson@calix.com.au +61 2 8199 7400

Darren Charles CFO and Company Secretary dcharles@calix.com.au +61 2 8199 7400

Simon Hinsley Investor Relations simon@nwrcommunications.com.au +61 401 809 653