Vesuvius Regulatory News (VSVS)

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached: ii

Vesuvius PLC

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

x

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

An event changing the breakdown of voting rights

Other (please specify):

3. Full name of person(s) subject to thenotification obligation: iii

Artisan Partners Limited Partnership, Artisan

Investments GP LLC, Artisan Partners Holdings LP,

and Artisan Partners Asset Management Inc.

4. Full name of shareholder(s)  (if different from 3.):iv

State Street Bank, Mellon Bank, Northern Trust, Bank of New York, Pictet & Cie, US Bank

5. Date of the transaction and date onwhich the threshold is crossed orreached: v

January 3, 2017

6. Date on which issuer notified:

January 4, 2017

7. Threshold(s) that is/are crossed orreached: vi, vii

Below 10%

8. Notified details:

A: Voting rights attached to shares viii, ix

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights x

Direct

Direct xi

Indirect xii

Direct

Indirect

GB00B82YXW83

30,269,561

11.16%

25,968,105

9.57%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate xiii

Exercise/Conversion Period xiv

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date xvii

Exercise/Conversion period xviii

Number of voting rights instrument refers to

% of voting rights xix, xx

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

25,968,105

9.57%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi

Artisan Partners Limited Partnership ("APLP"), a U.S. registered investment adviser, is a limited partnership organized under the laws of the State of Delaware. Control of APLP is vested in its general partner, Artisan Investments GP LLC ("Artisan LLC"), a limited liability company organized under the laws of the State of Delaware. Artisan Partners Holdings LP ("Artisan Holdings") is the sole member of Artisan LLC, and is the sole limited partner of APLP. Control of Artisan Holdings is vested in its general partner, Artisan Partners Asset Management Inc. ("APAM"), organized under the laws of the State of Delaware.

APAM is a publicly traded Company and has in issue three classes of common stock as well as preferred stock. No single undertaking is now in control of APAM.

Artisan International Value Fund ("ARTIV"), is a series of Artisan Partners Funds Inc., a U.S. registered investment company. Certain officers and a director of Artisan Partners Funds, Inc. are employees of APLP. APLP pursuant to its advisory contract with ARTIV has the power to purchase and sell securities on behalf of ARTIV and to vote for ARTIV. ARTIV, as of January 3, 2017, was interested in 18,830,429 shares, representing 6.94% of the 9.57% disclosed above, of Vesuvius PLC.

Proxy Voting:

10. Name of the proxy holder:

Artisan Partners Limited Partnership

11. Number of voting rights proxy holder will ceaseto hold:

N/A

12. Date on which proxy holder will cease to holdvoting rights:

N/A

13. Additional information:

14. Contact name:

Benjamin Prokash

15. Contact telephone number:

414.299.4315