Vesuvius PLC — AGM Information 2023

May 18, 2023

Company Number: 8217766

1

PUBLIC LIMITED COMPANY

SHAREHOLDER RESOLUTION

VESUVIUS PLC

Company Number: 8217766

(the "Company")

VESUVIUS PLC MEMBERS' RESOLUTION PASSED AT THE 2023 ANNUAL GENERAL MEETING HELD 18 MAY 2023

The following resolution was duly passed by the requisite majority of the members of the Company at the Annual General Meeting held at 11:00am on 18 May 2023 at the offices of Linklaters LLP, One Silk Street, London EC2Y 8HQ, and is submitted in accordance with Listing Rule 9.6.2 of the Financial Conduct Authority.

ORDINARY RESOLUTION

Resolution 21 - Amendment to the rules of the Vesuvius Share Plan

IT WAS RESOLVED that the amendments to the rules of the Vesuvius Share Plan (the "Plan") detailed in the Explanatory Notes to this Notice of Meeting, and in the copy of the Plan rules produced in draft to the Meeting and for the purposes of identification initialled by the Chairman, be and are hereby approved and the Remuneration Committee of the Company's Board be authorised to do all acts and things which it considers necessary or desirable to carry the same into effect.

Certified as a true copy

Henry Knowles Company Secretary, Vesuvius plc