Form 8 (Opening Position Disclosure) - Vesuvius Plc

FORM 8 (OPD)

PUBLIC OPENING POSITION DISCLOSURE BY A PARTY TO AN OFFER

Rules 8.1 and 8.2 of the Takeover Code (the “Code”)

1. KEY INFORMATION

(a) Full name of discloser:	Vesuvius plc
(b) Owner or controller of interests and short positions disclosed, if different from 1(a):  The naming of nominee or vehicle companies is insufficient.  For a trust, the trustee(s), settlor and beneficiaries must be named.	N/A
(c) Name of offeror/offeree in relation to whose relevant securities this form relates:  Use a separate form for each offeror/offeree	Vesuvius plc
(d) Is the discloser the offeror or the offeree?	OFFEREE
(e) Date position held:  The latest practicable date prior to the disclosure	12 October 2026
(f) In addition to the company in 1(c) above, is the discloser making disclosures in respect of any other party to the offer?  If it is a cash offer or possible cash offer, state “N/A”	No

2. POSITIONS OF THE PARTY TO THE OFFER MAKING THE DISCLOSURE

If there are positions or rights to subscribe to disclose in more than one class of relevant securities of the offeror or offeree named in 1(c), copy table 2(a) or (b) (as appropriate) for each additional class of relevant security.

(a) Interests and short positions in the relevant securities of the offeror or offeree to which the disclosure relates

Class of relevant security:	10 pence ordinary shares in the Offeree
	Interests		Short positions
	Number	%	Number	%
(1) Relevant securities owned and/or controlled:	Nil	-	Nil	-
(2) Cash-settled derivatives:	Nil	-	Nil	-
(3) Stock-settled derivatives (including options) and agreements to purchase/sell:	Nil	-	Nil	-
TOTAL:	Nil	-	Nil	-

All interests and all short positions should be disclosed.

Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions).

Details of any securities borrowing and lending positions or financial collateral arrangements should be disclosed on a Supplemental Form 8 (SBL).

(b) Rights to subscribe for new securities

Class of relevant security in relation to which subscription right exists:	N/A
Details, including nature of the rights concerned and relevant percentages:	N/A

3. POSITIONS OF PERSONS ACTING IN CONCERT WITH THE PARTY TO THE OFFER MAKING THE DISCLOSURE

Details of any interests, short positions and rights to subscribe (including directors’ and other employee options) of any person acting in concert with the party to the offer making the disclosure:

INTERESTS HELD BY DIRECTORS OF VESUVIUS PLC AND THEIR CLOSE RELATIVES AND RELATED TRUSTS (EXCLUDING OPTIONS AND AWARDS SET OUT BELOW): NAME NUMBER OF ORDINARY SHARES PERCENTAGE OF ISSUED ORDINARY SHARE CAPITAL (PER CENT.)1. Patrick André 711,507 0.287 Mark Collis* 150,077 0.060 Robert MacLeod 14,338 0.006 1. Rounded to three decimal places and excludes treasury shares *12,567 ordinary shares are held by close relatives of Mark Collis. OPTIONS AND AWARDS HELD BY DIRECTORS OF VESUVIUS PLC IN VESUVIUS PLC SHARES: NAME NUMBER OF SHARES SUBJECT TO OPTION/AWARD GRANT DATE DATE OF VESTING OPTION EXERCISE PRICE OPTION EXPIRY DATE Patrick André 64,560 (deferred share bonus plan award) 8 April 2024 8 April 2027 N/A N/A 41,300 (deferred share bonus plan award) 7 April 2025 7 April 2028 N/A N/A 23,532 (deferred share bonus plan award) 13 April 2026 13 April 2029 N/A N/A 310,721 (performance share plan nil-cost option) 8 April 2024 8 April 2027 £0.00 8 April 2034 399,589 (performance share plan nil-cost option) 7 April 2025 7 April 2028 £0.00 7 April 2035 390,051 (performance share plan award) 13 April 2026 13 April 2029 N/A N/A Mark Collis 23,854 (deferred share bonus plan award) 8 April 2024 8 April 2027 N/A N/A 20,537 (deferred share bonus plan award) 7 April 2025 7 April 2028 N/A N/A 11,897 (deferred share bonus plan award) 13 April 2026 13 April 2029 N/A N/A 135,940 (performance share plan nil-cost option) 8 April 2024 8 April 2027 £0.00 8 April 2034 175,116 (performance share plan nil-cost option) 7 April 2025 7 April 2028 £0.00 7 April 2035 175,972 (performance share plan nil-cost option) 13 April 2026 13 April 2029 £0.00 13 April 2036

Details of any open stock-settled derivative positions (including traded options), or agreements to purchase or sell relevant securities, should be given on a Supplemental Form 8 (Open Positions).

Details of any securities borrowing and lending positions or financial collateral arrangements should be disclosed on a Supplemental Form 8 (SBL).

4. OTHER INFORMATION

(a) Indemnity and other dealing arrangements

Details of any indemnity or option arrangement, or any agreement or understanding, formal or informal, relating to relevant securities which may be an inducement to deal or refrain from dealing entered into by the party to the offer making the disclosure or any person acting in concert with it: Irrevocable commitments and letters of intent should not be included. If there are no such agreements, arrangements or understandings, state “none”

None.

(b) Agreements, arrangements or understandings relating to options or derivatives

Details of any agreement, arrangement or understanding, formal or informal, between the party to the offer making the disclosure, or any person acting in concert with it, and any other person relating to: (i) the voting rights of any relevant securities under any option; or (ii) the voting rights or future acquisition or disposal of any relevant securities to which any derivative is referenced: If there are no such agreements, arrangements or understandings, state “none”

None.

(c) Attachments

Are any Supplemental Forms attached?

Supplemental Form 8 (Open Positions)	NO
Supplemental Form 8 (SBL)	NO

Date of disclosure:	13 October 2026
Contact name:	Henry Knowles General Counsel & Company Secretary
Telephone number:	[phone]

Public disclosures under Rule 8 of the Code must be made to a Regulatory Information Service.

The Panel’s Market Surveillance Unit is available for consultation in relation to the Code’s disclosure requirements on [phone].

The Code can be viewed on the Panel’s website at www.thetakeoverpanel.org.uk.

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