Agreements to Build Two IOsorb® Plants in Oklahoma

14 September 2026

Iofina plc

("Iofina", the "Company" or the "Group")

(AIM: IOF)

Agreements to Build Two IOsorb® Plants in Oklahoma

Iofina plc, specialists in the exploration and production of iodine and manufacturers of specialty chemical products, announces that it has signed agreements with an existing brine supply partner to develop the Group's next two IOsorb® plants, IO#13 and IO#14, in the central Oklahoma core area.

These two plants will be built concurrently, and groundwork is anticipated to start soon, with the IOsorb® plants preliminarily scheduled to be operational before the end of H1 2027. This project will be the largest undertaking for the Group in this core area, but otherwise the underlying characteristic of the plants will be consistent with recent IOsorb® builds.

With both new plants aiming to be operational by the end of H1 2027, along with IO#12 expected to be commissioned by the end of the month, the Group is confidently tracking to its production targets over the next couple of years and towards its objective of reaching 2000MT of production per annum. The Company looks forward to providing further updates as this project progresses.

President and CEO, Dr. Tom Becker, commented:

"We are delighted to be partnering with one of our existing partners to construct two new IOsorb® plants simultaneously. The decision to build two plants at the same time is a calculated choice to ensure the delivery of the Group's strategy. The new plants will be built within our established core Oklahoma territory, and combined, these plants are expected to significantly add to Iofina's crystalline iodide production capacity."

This announcement contains inside information for the purposes of article 7 of the Market Abuse Regulation (EU) 596/2014 as it forms part of domestic law by virtue of the European Union (Withdrawal) Act 2018.

Enquiries:

Dr. Tom Becker

CEO & President

Iofina plc

Tel: +44 (0)20 3006 3135

Nomad & Broker:

Canaccord Genuity Limited

Henry Fitzgerald-O'Connor / Harry Rees

Tel: +44 (0)20 7523 8000

Financial PR and Media Contact:

Yellow Jersey PR Limited

Charles Goodwin / Shivantha Thambirajah

Tel: +44 (0)7747 788221 / +44 (0)7983 521488

About Iofina:

Iofina plc (AIM: IOF) is a vertically integrated company that specialises in the production of Iodine and the manufacturing of specialty chemical products. Iofina is the second largest producer of iodine in North America and operates the manufacturing entities Iofina Resources and Iofina Chemical.

LEI: 213800QDMFYVRJYYTQ84

ISIN: GB00B2QL5C79

Iofina Resources

Iofina Resources develops, builds, owns, and operates iodine extraction plants using Iofina's WET® IOsorb® technology. Iofina currently operates eight producing IOsorb® plants in Oklahoma and is consistently using technology and innovation to improve and expand its operations.

Iofina Chemical

Iofina Chemical has manufactured high-quality halogen speciality chemicals derived from raw iodine, as well as non-iodine-based products. Iofina Chemical celebrated its 40th anniversary in 2023 as a preeminent halogen-based specialty chemicals company.

www.iofina.com