SIG PLC

Proxy Solicitation & Information Statement • Aug 8, 2025

The Chairman of SIG plc invites you to attend the General Meeting of the Company to be held at SIG West London, Mathisen Way, Poyle, Slough, SL3 0HB on 28 August 2025 at 12.00pm.

Shareholder Reference Number

Please detach this portion before posting this proxy form.

Form of Proxy - SIG plc General Meeting to be held on 28 August 2025

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You will be asked to enter the Control Number, Shareholder Reference Number (SRN) and PIN shown opposite and agree to certain terms and conditions.

SRN: Control Number: 920950

PIN:

View the Notice of General Meeting online at: https://www.sigplc.com/investors

Register at www.investorcentre.co.uk - elect for electronic communications & manage your shareholding online!

To be effective, all proxy appointments must be lodged with the Company's Registrars at: Computershare Investor Services PLC, The Pavilions, Bridgwater Road, Bristol BS99 6ZY by 26 August 2025 at 12.00pm.

Explanatory Notes:

• 1. Every holder has the right to appoint some other person(s) of their choice, who need not be a shareholder, as their proxy to exercise all or any of their rights, to attend, speak and vote on their behalf at the meeting. If you wish to appoint a person other than the Chairman, please insert the name of your chosen proxy holder in the space provided (see reverse). If the proxy is being appointed in relation to less than your full voting entitlement, please enter in the box next to the proxy holder's name (see reverse) the number of shares in relation to which they are authorised to act as your proxy. If returned without an indication as to how the proxy shall vote on any particular matter, the proxy will exercise their discretion as to whether, and if so how, they vote (or if this proxy form has been issued in respect of a designated account for a shareholder, the proxy will exercise their discretion as to whether, and if so how, they vote).
• 2. To appoint more than one proxy, an additional proxy form(s) may be obtained by contacting the Registrar's helpline on 0370 707 1293 or you may photocopy this form. Please indicate in the box next to the proxy holder's name (see reverse) the number of shares in relation to which they are authorised to act as your proxy. Please also indicate by marking the box provided if the proxy instruction is one of multiple instructions being given. All forms must be signed and should be returned together in the same envelope.
• 3. The 'Vote Abstain' option overleaf is provided to enable you to abstain on any particular resolution. However, it should be noted that a 'Vote Abstain' is not a vote in law and will not be counted in the calculation of the proportion of the votes 'For' and 'Against' a resolution.

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: (i) account holders; or (ii) uniquely designated accounts. The Company and Computershare Investor Services PLC accept no liability for any instruction that does not comply with these conditions.

• 4. Pursuant to Regulation 41 of the Uncertificated Securities Regulations 2001, entitlement to attend and vote at the meeting and the number of votes which may be cast thereat will be determined by reference to the Register of Members of the Company at close of business on the day which is two business days before the day of the meeting. Changes to entries on the Register of Members after that time shall be disregarded in determining the rights of any person to attend and vote at the meeting.
• 5. To appoint one or more proxies or to give an instruction to a proxy (whether previously appointed or otherwise) via the CREST system, CREST messages must be received by the issuer's agent (ID number 3RA50) not later than 48 hours (business days) before the time appointed for holding the meeting. For this purpose, the time of receipt will be taken to be the time (as determined by the timestamp generated by the CREST system) from which the issuer's agent is able to retrieve the message. The Company may treat as invalid a proxy appointment sent by CREST in the circumstances set out in Regulation 35(5)(a) of the Uncertificated Securities Regulations 2001.
• 6. The above is how your address appears on the Register of Members. If this information is incorrect please ring the Registrar's helpline on 0370 707 1293 to request a change of address form or go to www.investorcentre.co.uk to use the online Investor Centre service.
• 7. Any alterations made to this form should be initialled.
• 8. The completion and return of this form will not preclude a member from attending the meeting and voting in person.

All Named Holders

Poll Card To be completed only at the General Meeting if a Poll is called.

Ordinary Business For Against Abstain

1.	THAT the grant of a recruitment restricted share award to Pim
	Vervaat on and subject to the terms set out in the circular of
	which this Notice of General Meeting forms part (a copy of which
	was also produced to the General Meeting and initialled by the
	Chair for identification) be and is hereby approved for the
	purposes of section 226B(1)(b) of the Companies Act 2006, as
	amended.

Signature
In the case of a Corporation, a letter of representation will be required (in accordance with S323 of the Companies Act
2006) unless this has already been lodged at registration.

Form of Proxy

Please complete this box only if you wish to appoint a third party proxy other than the Chairman. Please leave this box blank if you want to select the Chairman. Do not insert your own name(s).

I/We hereby appoint the Chairman of the Meeting OR the person indicated in the box above as my/our proxy to attend, speak and vote in respect of my/our full voting entitlement* on my/our behalf at the General Meeting of SIG plc to be held at SIG West London, Mathisen Way, Poyle, Slough, SL3 0HB on 28 August 2025 at 12.00pm, and at any adjourned meeting.

* For the appointment of more than one proxy, please refer to Explanatory Note 2 (see front).

Please mark here to indicate that this proxy appointment is one of multiple appointments being made.

Please use a black pen. Mark with an X inside the box as shown in this example.

Ordinary Business For Against Abstain

1. THAT the grant of a recruitment restricted share award to Pim Vervaat on and subject to the terms set out in the circular of which this Notice of General Meeting forms part (a copy of which was also produced to the General Meeting and initialled by the Chair for identification) be and is hereby approved for the purposes of section 226B(1)(b) of the Companies Act 2006, as amended.

*

For	Against	Abstain

I/We instruct my/our proxy as indicated on this form. Unless otherwise instructed the proxy may vote as he or she sees fit or abstain in relation to any business of the meeting.

Signature	Date

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In the case of a corporation, this proxy must be given under its common seal or be signed on its behalf by an attorney or officer duly authorised, stating their capacity (e.g. director, secretary).

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