For immediate release

Itaconix plc

("Itaconix" or the "Company")

Holdings in Company

Itaconix (LSE: ITX) (OTCQB: ITXXF), a leading innovator in sustainable plant-based polymers used to decarbonise everyday consumer products, announces that it was notified on 4 October 2023 of the pending transfer of share certificates ("Shares") held by John R. Shaw (CEO), Laura Denner (CFO) and Dr. Yvon Durant (CTO) to Fidelity Investments as the new registered holder. The transfers will allow these Shares to be held in their individual US brokerage accounts. There is no change to the beneficial ownership of the Shares.

The Shares transferred are as follows:

·      John R. Shaw - 940,411 Shares

·      Laura Denner - 255,724 Shares

·      Dr. Yvon Durant - 110,489 Shares

A total of 1,306,624 Shares have been transferred, representing approximately 9.7% of the Company's ordinary shares in issue. The transfer is expected to be effective in the coming days.

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About Itaconix

Itaconix uses its proprietary plant-based polymer technology platform to produce and sell specialty ingredients that improve the safety, performance, and sustainability of consumer products.  The Company's current ingredients are enabling and leading new generations of products in cleaning, hygiene, and beauty.

www.itaconix.com