Vesuvius Regulatory News (VSVS)

17 December 2012

VESUVIUS PLC

Demerger update: Vesuvius Admission

Vesuvius plc is pleased to announce that admission of its ordinary shares to the premium listing segment of the Official list and to trading on the London Stock Exchange's main market for listed securities took place at 8.00 a.m. this morning.

Vesuvius plc is currently the holding company of the entire Cookson group, including the Performance Materials division.

The Demerger is expected to become effective prior to 8.00 a.m. on 19 December 2012. If the Demerger becomes effective, each Vesuvius Shareholder on the register at 6.00 p.m. on 18 December 2012, the Demerger Record Time, will receive one Alent Share in addition to each Vesuvius Share they already hold. Following the Demerger Effective Time, Vesuvius will trade with the ticker VSVS.

Admission of the Alent Shares to the premium listing segment of the Official list and to trading on the London Stock Exchange's main market for listed securities, under the ticker ALNT, is expected to occur at 8.00 a.m. on Wednesday 19 December 2012. CREST accounts will be credited with Alent Shares at the same time and certificates in respect of Alent Shares will be despatched by 2 January 2013.

A detailed timetable of events is set out in the circular sent to Cookson Group plc shareholders dated 1 November 2012 (the "Circular").

Copies of the Circular are available for inspection during normal business hours on any business day at the offices of Linklaters LLP, One Silk Street, London EC2Y 8HQ, up to and including the Demerger Effective Time.

Capitalised terms used in this announcement have the meanings given to them in the Circular.

About Vesuvius

Vesuvius is a global leader in metal flow engineering, developing, manufacturing and marketing mission-critical ceramic consumable products and systems to demanding applications, primarily in the global steel and foundry industries. Vesuvius also supplies fabricated precious metals to the jewellery industry in Europe and has significant precious metals recycling operations.

About Alent

Alent is a leading global supplier of advanced surface treatment plating chemicals and electronics assembly materials. The principal end-market is global electronics production which accounts for approximately three-quarters of net sales value with the automotive and industrial end-markets the balance.

Contacts

Vesuvius Tel: +44(0)20 7822 0000

Rachel Fell, Company Secretary

Maddy Cox-Smith, Investor Relations Manager

MHP Communications Tel: +44(0)20 3128 8100

John Olsen

Ian Payne