22 August 2023

Itaconix plc

("Itaconix" or the "Company")

Share Consolidation & Total Voting Rights

Itaconix (AIM: ITX) (OTCQB: ITXXF), a leading innovator in sustainable plant-based polymers used to decarbonize everyday consumer products, is pleased to confirm that the Share Consolidation announced on 15 August 2023 has become effective.

Share Consolidation

At the Record Date, being 6.00 p.m. (BST) on 21 August 2023, 674,306,100 Existing Ordinary Shares were consolidated into 13,486,122 New Ordinary Shares at a conversion ratio of 50:1.

Following the Share Consolidation, share certificates in respect of the Existing Ordinary Shares have ceased to be valid and certificates in respect of the New Ordinary Shares will be dispatched shortly to those shareholders who hold their shares in certificated form. CREST Shareholders will have their CREST account credited with their New Ordinary Shares following Admission.

Admission to trading on AIM and Total Voting Rights

Application has been made to the London Stock Exchange for the New Ordinary Shares to be admitted to trading on AIM. It is expected that Admission will become effective and that dealings in the New Ordinary Shares will commence at 8.00 a.m. (BST) today, 22 August 2023.

The New Ordinary Shares will trade under the ISIN: GB00BPK3YZ68 and SEDOL: BPK3YZ6.

The share capital of the Company is now 13,486,122 New Ordinary Shares of which no shares are held in treasury. Therefore, the total number of voting rights in the Company is 13,486,122. Shareholders may use this figure 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 Company under the FCA's Disclosure Guidance and Transparency Rules.

This announcement should be read in conjunction with the Notice of AGM that was published on 5 June 2023, copies of which are available on the Company's website at www.itaconix.com, and the Company's announcement of 15 August 2023 titled Share Consolidation (the "Announcement"). Capitalized terms in this announcement have the same meaning as given in the Announcement, unless the context provides otherwise.

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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 detergents, hygiene, and hair care. Itaconix's products contribute to the global low carbon economy.