Holding(s) in Company

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

AMEC PLC

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

An acquisition or disposal of voting rights

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):

A disposal of indirectly held voting rights in the issuer by Artisan Investment Corporation, ZFIC, Inc., Andrew A. Ziegler and Carlene M. Ziegler pursuant to a corporate restructuring.

X

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

Artisan Partners Limited Partnership, Artisan Investments GP LLC, Artisan Partners Holdings LP, Artisan Partners Asset Management Inc., Artisan Investment Corporation, ZFIC, Inc., Andrew A. Ziegler and Carlene M. Ziegler.

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

State Street Bank, Bank of New York, Mellon Bank, Northern Trust, JP Morgan Chase, Pictet & Cie, RBC Dexia Investor Services Bank, and CIBC Mellon

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

March 12, 2014

6. Date on which issuer notified:

March 12, 2014

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

Below 5%

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

GB0000282623

21,951,502

7.36%

0

0%

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

0

0.0%

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 has in issue three classes of common stock as well as preferred stock.

Prior to 12 March 2014, control of APAM was vested in Artisan Investment Corporation ("AIC"), pursuant to a stockholders agreement dated 12 March 2013 entered into between various common stockholders (the "Stockholders Agreement"). Control of AIC is vested in ZFIC, Inc. ("ZFIC"), a corporation organized under the laws of the State of Wisconsin. Andrew A. Ziegler and Carlene M. Ziegler each own 50% of the voting stock of ZFIC.

On 12 March 2014, AIC's rights pursuant to the Stockholders Agreement were terminated. No single undertaking is now in control of APAM.

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:

AMEC plc is disclosing this information in accordance with DTR 5.8.12

14. Contact name:

Christopher Fidler

15. Contact telephone number:

01565 683235