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 |N/A | |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. | | +--------------------------------------------------------------+---------------+ |(c)Name of offeror/offeree in relation to whose relevant |Vesuvius plc | |securities this form relates: | | | | | |Use a separate form for each offeror/offeree | | +--------------------------------------------------------------+---------------+ |(d)Is the discloser the offeror or the offeree? |OFFEREE | +--------------------------------------------------------------+---------------+ |(e)Date position held: |12 October 2026| | | | |The latest practicable date prior to the disclosure | | +--------------------------------------------------------------+---------------+ |(f)In addition to the company in 1(c) above, is the discloser |No | |making disclosures in respect of any other party to the offer?| | | | | |If it is a cash offer or possible cash offer, state "N/A" | | +--------------------------------------------------------------+---------------+ 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 |Nil|- |Nil|- | |controlled: | | | | | +---------------------------------------+---+------+---+-----+ |(2)Cash-settled derivatives: |Nil|- |Nil|- | +---------------------------------------+---+------+---+-----+ |(3)Stock-settled derivatives (including|Nil|- |Nil|- | |options) and agreements to | | | | | |purchase/sell: | | | | | +---------------------------------------+---+------+---+-----+ |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 Form8 (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: | +-----------------------------------------------------------------------------+ | | | 1. INTERESTS HELD BY DIRECTORS OF VESUVIUS PLC AND THEIR CLOSE RELATIVES AND| |RELATED TRUSTS (EXCLUDING OPTIONS AND AWARDS SET OUT BELOW): | | | |[] | |+-------+---------+-----------------------------+ | ||NAME |NUMBER OF|PERCENTAGE OF ISSUED ORDINARY| | || |ORDINARY |SHARE CAPITAL (PER CENT.)[1.]| | || |SHARES | | | |+-------+---------+-----------------------------+ | ||Patrick|711,507 |0.287 | | ||André | | | | |+-------+---------+-----------------------------+ | ||Mark |150,077 |0.060 | | ||Collis*| | | | |+-------+---------+-----------------------------+ | ||Robert |14,338 |0.006 | | ||MacLeod| | | | |+-------+---------+-----------------------------+ | | | |1. Rounded to three decimal places and excludes treasury shares | | | |*12,567 ordinary shares are held by close relatives of Mark Collis. | | | | 2. OPTIONS AND AWARDS HELD BY DIRECTORS OF VESUVIUS PLC IN VESUVIUS PLC | |SHARES: | | | |+----------------------+----------------+-------+-------+--------+------+ | ||NAME |NUMBER OF SHARES|GRANT |DATE OF|OPTION |OPTION| | || |SUBJECT TO |DATE |VESTING|EXERCISE|EXPIRY| | || |OPTION/AWARD | | |PRICE |DATE | | |+----------------------+----------------+-------+-------+--------+------+ | ||Patrick André |64,560 (deferred|8 April|8 April|N/A |N/A | | || |share bonus plan|2024 |2027 | | | | || |award) | | | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||41,300 (deferred share|7 April 2025 |7 April|N/A |N/A | | ||bonus plan award) | |2028 | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||23,532 (deferred share|13 April 2026 |13 |N/A |N/A | | ||bonus plan award) | |April | | | | || | |2029 | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||310,721 (performance |8 April 2024 |8 April|£0.00 |8 April | | ||share plan nil-cost | |2027 | |2034 | | ||option) | | | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||399,589 (performance |7 April 2025 |7 April|£0.00 |7 April | | ||share plan nil-cost | |2028 | |2035 | | ||option) | | | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||390,051 (performance |13 April 2026 |13 |N/A |N/A | | ||share plan award) | |April | | | | || | |2029 | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||Mark Collis |23,854 (deferred|8 April|8 April|N/A |N/A | | || |share bonus plan|2024 |2027 | | | | || |award) | | | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||20,537 (deferred share|7 April 2025 |7 April|N/A |N/A | | ||bonus plan award) | |2028 | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||11,897 (deferred share|13 April 2026 |13 |N/A |N/A | | ||bonus plan award) | |April | | | | || | |2029 | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||135,940 (performance |8 April 2024 |8 April|£0.00 |8 April | | ||share plan nil-cost | |2027 | |2034 | | ||option) | | | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||175,116 (performance |7 April 2025 |7 April|£0.00 |7 April | | ||share plan nil-cost | |2028 | |2035 | | ||option) | | | | | | |+----------------------+----------------+-------+-------+--------+------+ | ||175,972 (performance |13 April 2026 |13 |£0.00 |13 April| | ||share plan nil-cost | |April | |2036 | | ||option) | |2029 | | | | |+----------------------+----------------+-------+-------+--------+------+ | +-----------------------------------------------------------------------------+ 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: |+44 7435 660 923 | +-------------------+-----------------------------------+ 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 +44 (0)20 7638 0129. The Code can be viewed on the Panel's website at www.thetakeoverpanel.org.uk. This information was brought to you by Cision http://news.cision.com https://news.cision.com/vesuvius-plc/r/form-8--opening-position-disclosure----vesuvius-plc,c4408192