5 January 2023

Itaconix plc

("Itaconix" or the “Company”)

Board Change

Itaconix (AIM: ITX) (OTCQB: ITXXF), a leading innovator in sustainable plant-based polymers used to decarbonize everyday consumer products, is pleased to announce changes to the Board.

Paul LeBlanc is appointed to the Board as an independent Non-Executive Director and Chair of the Audit Committee with immediate effect. He is Chief Financial Officer and Treasurer of Bemis Associates Inc. (“Bemis”), a global manufacturer of specialty films and adhesives for the apparel and industrial markets. He joined Bemis in 1999 as Controller and assumed increasing levels of responsibility during Bemis’ rapid growth into a global manufacturer, including overseeing the acquisition and integration of operations in Europe and Asia. He earned his Bachelor of Science in Accounting from Thomas College and his Master of Business Administration from University of Massachusetts, Dartmouth.

In addition, Dr. Peter Nieuwenhuizen, the Company’s Non-Executive Interim Chair, who joined the 
Board in July 2022 now takes the role of Non-Executive Chair on a permanent basis and with immediate effect.

The Board now comprises Dr. Peter Nieuwenhuizen (Non-Executive Chair), Paul LeBlanc (Non-Executive Director), John R. Shaw (Chief Executive Officer), and Laura Denner (Chief Financial Officer).

Dr. Peter Nieuwenhuizen, Chair, commented:

“As Itaconix enters a new phase of development with its rapid revenue growth, I am pleased to 
welcome Paul to our Board. He is a dynamic CFO who has played a leadership role in expanding 
financial and overall operations as Bemis has grown from a domestic business with less than $40 
million in revenues into an international enterprise with over $200 million in annual revenues. As we 
reach new levels of commercial progress, Paul will contribute valuable finance knowledge and operating experience to our next stage of growth.”

Regulatory disclosures

INFORMATION REQUIRED UNDER RULE 17 AND SCHEDULE 2, PARAGRAPH (G) OF THE AIM RULES FOR COMPANIES ("AIM RULES")

Full name:                                            Paul Daniel LeBlanc

Age:                                                     60

Shareholding in the Company:            No shares held

Current directorships and                    Bemis Associates Inc.

partnerships:                                       Bemis Associates UK Limited

                                                            Bemis Hong Kong Ltd

                                                            Bemis International Inc.

                                                            PolyVisions Holdings Inc.

                                                            PolyVisions Inc.

There is no further information to be disclosed in relation to the director appointment pursuant to

Rule 17 and Schedule 2, paragraph (g) of the AIM Rules.

- Ends -

For further information please contact:

Itaconix plc                                                                                   +1 603 775 4400

John R. Shaw / Laura Denner

Belvedere Communications                                                         +44 (0) 20 3008 6864

John West / Llew Angus

finnCap                                                                                       +44 (0) 20 7220 0500

Ed Frisby / Abigail Kelly / Milesh Hindocha (Corporate Finance)

Andrew Burdis / Sunila de Silva (ECM)

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 contributions to the global low carbon economy are recognized by the London Stock Exchange's Green Economy Mark.