Elementis PLC

Pre-Annual General Meeting Information • Mar 22, 2023

Admission card

The Annual General Meeting ("AGM") of Elementis plc to be held at the offices of Allen & Overy LLP, One Bishops Square, London, E1 6AD and electronically on 26 April 2023 at 10.00 am.

Kindly note: this form is issued only to the addressee(s) and is specific to the unique designated account printed hereon. This personalised form is not transferable between different account holders or uniquely designated accounts. Elementis plc and Equiniti Limited accept no liability for any instruction that does not comply with these conditions.

If you would like to attend the meeting electronically, please follow the instructions on pages 11 and 12 of the Notice of Meeting.

You will require the following details:

Meeting ID: 159-402-070

SRN: (Shareholder Reference Number)

PIN: This is the first 2 and last 2 digits of the SRN above.

Please detach the form below before posting.

.

DETACH HERE

Voting ID	Task ID	Shareholder Reference Number
+				1387-0100	+
		Please indicate your vote by marking a 'X' in the appropriate boxes.
at www.sharevote.co.uk using the above numbers. Form of proxy	Please detach and post this section. Alternatively, you can vote electronically I/we being (a) member(s) of Elementis plc (the 'Company') hereby appoint the Chair of the Meeting, or (insert full name clearly in box (1) below) (1)+ as my/our proxy to vote for me/us on my/our behalf at the Annual General Meeting of the Company to be held at the offices of Allen & Overy LLP, One Bishops Square, London, E1 6AD on 26 April 2023 at 10.00 am and at any	Resolutions 1. To receive the Company's accounts and the reports of the directors and auditors. 2. To approve the Directors' Remuneration Report. 3. To elect Clement Woon as a director. 4. To re-elect John O'Higgins as a director. 5. To re-elect Paul Waterman as a director. 6. To re-elect Ralph Hewins as a director. 7. To re-elect Dorothee Deuring as a director. 8. To re-elect Steve Good as a director. 9. To re-elect Trudy Schoolenberg as a director.	For	Against	Vote withheld
adjournment thereof. (Insert in box (2) below the number of shares your proxy is authorised to vote).		10. To re-elect Christine Soden as a director. 11. To re-appoint Deloitte LLP as auditors.
	(2)+	12. To authorise the Audit Committee to determine the remuneration of the auditors.
(3)+ Tick here if this proxy is one of multiple appointments being made. If you do not give any directions as to how your proxy should vote on the Resolutions, or on any other business of the Meeting, he/she will exercise his/her discretion as to whether, and if so how, he/she votes. The 'Vote withheld' option is to allow you to abstain on any particular Resolution and is not a vote in law and will not be counted as 'For' or 'Against' a Resolution. In the case of a corporation, this proxy must be given under its common seal		13. To grant authority to the directors to allot shares. 14. To authorise political donations.
		15. *To approve the holding of general meetings at 14 clear days' notice.
		16. *To disapply statutory pre-emption rights on the allotment of shares.
their capacity (e.g. director, secretary). Signature	or be signed on its behalf by an attorney or officer, duly authorised, stating Date	17. *To disapply statutory pre-emption rights on the allotment of shares for an acquisition or capital investment.
		18. *To renew the Company's authority to purchase its own shares in the market.
	+ Each number refers to the corresponding note in the explanatory notes overleaf.

• * Special Resolution

Explanatory notes to Form of proxy

(To be read in conjunction with the Notice of Meeting and the accompanying notes.)

• 1. If you want to appoint another person to be your proxy, strike out the words 'Chairman of the Meeting' and insert in the box the name of the proxy and initial the alterations. A proxy need not be a member of the Company.
• 1. To enable your proxy to vote all your shares, insert your total shareholding or leave the box blank. Alternatively, if you wish to restrict the number of shares your proxy can vote, insert the number of shares in relation to which your proxy is authorised to act.
• 1. To appoint more than one proxy, (an) additional proxy form(s) may be obtained by calling the Registrars on +44 (0)371 384 2379*. For Non-UK callers, please use the country code when calling from outside the UK, or you may photocopy this form. Please tick the box provided if the proxy instruction is one of multiple instructions being given. All forms must be signed and returned in the same envelope. Please ensure that the total number of shares for all your proxies does not exceed your total shareholding.
• 1. For this Form of proxy to be valid, detach from the Admission card and deliver to Equiniti Limited, Aspect House, Spencer Road, Lancing, West Sussex BN99 6DA by 10.00 am on 24 April 2023, or 48 hours (excluding non-working days) before the appointed time of any adjourned Meeting. For information about a member's right to appoint a proxy and other rights, please see the notes accompanying the Notice of Meeting.
• 1. Members who wish to appoint a proxy through the CREST system should also refer to the notes in the Notice of Meeting.
• 1. Completing a Form of proxy will not prevent a member from attending in person and voting in person if he/she so wishes.
• * Lines are open 8.30am to 5.30pm, Monday to Friday, excluding bank holidays in England and Wales.

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Allen & Overy's building can be approached from Folgate Street to the north and Brushfield Street to the south.

All visitors to the offices of Allen & Overy LLP are required to provide a form of ID for security purposes. Please report to the firm's reception. The AGM will take place on the first floor, which is accessible via the lifts from the entrance lobby.

The pedestrian footpath (Sun Street Passage) is only accessible from inside Liverpool Street Station on the upper concourse. For a station plan, visit http://www.nationalrail.co.uk/stations-and-destinations/stations-made-easy/ london-liverpool-street-station-plan

Venue address Allen & Overy LLP 1st Floor One Bishops Square London E1 6AD

London Underground

The venue is 5 minutes' walk from Liverpool Street tube and train station, and 20 minutes walk from Moorgate tube station.