TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB00B82YXW83 Issuer Name VESUVIUS PLC UK or Non-UK Issuer UK 2. Reason for Notification Other Comments This filing was triggered by a transfer of existing shares to Dimensional's management. 3. Details of person subject to the notification obligation Name Dimensional Fund Advisors LP City of registered office (if applicable) Austin Country of registered office (if applicable) USA 4. Details of the shareholder +---------------------------+----------+----------------------------+ |Name |City of |Country of registered office| | |registered| | | |office | | +---------------------------+----------+----------------------------+ |The shares are held by one | | | |or more nominees/custodians| | | +---------------------------+----------+----------------------------+ 5. Date on which the threshold was crossed or reached 12-Oct-2026 6. Date on which Issuer notified 14-Oct-2026 7. Total positions of person(s) subject to the notification obligation +----------------+-----------+------------------+--------+-----------+ |. |% of voting|% of voting rights|Total of|Total | | |rights |through financial |both |number of | | |attached to|instruments (total|in % |voting | | |shares |of 8.B 1 + 8.B 2) |(8.A + |rights held| | |(total | |8.B) |in issuer | | |of 8.A) | | | | +----------------+-----------+------------------+--------+-----------+ |Resulting |5.052162 |0.000000 |5.052162|12538038 | |situation on the| | | | | |date on | | | | | |which threshold | | | | | |was crossed or | | | | | |reached | | | | | +----------------+-----------+------------------+--------+-----------+ |Position of | | | | | |previous | | | | | |notification | | | | | |(if applicable) | | | | | +----------------+-----------+------------------+--------+-----------+ 8. Notified details of the resulting situation on the date on which the threshold was crossed or reached 8A. Voting rights attached to shares +------------+----------------+------------------+-------------+-------------+ |Class/Type |Number of direct|Number of indirect|% of direct |% of indirect| |of shares |voting rights |voting rights |voting rights|voting rights| |ISIN code(if|(DTR5.1) |(DTR5.2.1) |(DTR5.1) |(DTR5.2.1) | |possible) | | | | | +------------+----------------+------------------+-------------+-------------+ |GB00B82YXW83| |12538038 | |5.052162 | +------------+----------------+------------------+-------------+-------------+ |Sub Total |12538038 |5.052162% | |8.A | | | +------------+----------------+------------------+-------------+-------------+ 8B1. Financial Instruments according to (DTR5.3.1R.(1) (a)) +----------+----------+---------+-----------------------------------+------+ |Type of |Expiration|Exercise/|Number of voting rights that may be|% of | |financial |date |conve |acquired if the instrument is |voting| |instrument| |rsion |exercised/converted |rights| | | |period | | | +----------+----------+---------+-----------------------------------+------+ | | | | | | +----------+----------+---------+-----------------------------------+------+ |Sub Total | | | | |8.B1 | | | | +----------+----------+---------+-----------------------------------+------+ 8B2. Financial Instruments with similar economic effect according to (DTR5.3.1R.(1) (b)) +--------------+----------+--------------+-----------+---------+------+ |Type of |Expiration|Exercise/conve|Physical or|Number of|% of | |financial |date |rsion period |cash |voting |voting| |instrument | | |settlement |rights |rights| +--------------+----------+--------------+-----------+---------+------+ | | | | | | | +--------------+----------+--------------+-----------+---------+------+ |Sub Total 8.B2| | | | +--------------+----------+--------------+-----------+---------+------+ 9. Information in relation to the person subject to the notification obligation 2. Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person or legal entities (please add additional rows as necessary) +-----------+-----------+------------------+-----------+----------------+ |Ultimate |Name of |% of voting rights|% of voting|Total of both if| |controlling|controlled |if it equals or is|rights |it equals or is | |person |undertaking|higher than the |through |higher than the | | | |notifiable |financial |notifiable | | | |threshold |instruments|threshold | | | | |if it | | | | | |equals or | | | | | |is higher | | | | | |than the | | | | | |notifiable | | | | | |threshold | | +-----------+-----------+------------------+-----------+----------------+ |Dimensional|i) | | | | |Holdings |Dimensional| | | | |Inc. |Fund | | | | | |Advisors | | | | | |Ltd., (ii) | | | | | |DFA | | | | | |Australia | | | | | |Limited | | | | | |(iii) | | | | | |Dimensional| | | | | |Ireland | | | | | |Limited | | | | | |(iv) | | | | | |Dimensional| | | | | |Fund | | | | | |Advisors | | | | | |Canada ULC | | | | | |(v) | | | | | |Dimensional| | | | | |Fund | | | | | |Advisors | | | | | |Pte. Ltd. | | | | | |and (vi) | | | | | |Dimensional| | | | | |Fund | | | | | |Advisors LP| | | | +-----------+-----------+------------------+-----------+----------------+ 10. In case of proxy voting Name of the proxy holder The number and % of voting rights held The date until which the voting rights will be held If date does not apply, explain below 11. Additional Information The ordinary shares are held in segregated accounts and funds (together, the "Accounts") managed on a discretionary basis by Dimensional Fund Advisors LP and its subsidiary undertakings i) Dimensional Fund Advisors Ltd., (ii) DFA Australia Limited (iii) Dimensional Ireland Limited (iv) Dimensional Fund Advisors Canada ULC and (v) Dimensional Fund Advisors Pte. Ltd. Dimensional Fund Advisors LP is controlled by its general partner, Dimensional Holdings Inc. Dimensional Fund Advisors LP, on behalf of itself and its subsidiary undertakings, expressly disclaims beneficial ownership of the shares held in the Accounts. To note, as of 12 October 2026, Dimensional Fund Advisors LP also had investment management discretion over an additional 47,867 shares held by the Accounts where the voting rights are not controlled by Dimensional Fund Advisors LP or its subsidiary undertakings. 12. Date of Completion 14-Oct-2026 13. Place Of Completion Paris This information was brought to you by Cision http://news.cision.com https://news.cision.com/vesuvius-plc/r/holding-s--in-company,c4409431