Holding(s) in Company

John Wood Group PLC (“Company”)

NOTIFICATION OF MAJOR INTEREST IN SHARES

1.       Name of Issuer

JOHN WOOD GROUP PLC

2.       Reason for Notification

DISPOSAL OF VOTING RIGHTS

3.       Full name of person(s) subject to notification obligation

AMERIPRISE FINANCIAL, INC. AND ITS GROUP

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

1)      THREADNEEDLE ASSET MANAGEMENT LIMITED

2)      COLUMBIA MANAGEMENT INVESTMENT ADVISERS, LLC

5.       Date of the transaction and date on which the threshold is crossed or reached

14 OCTOBER 2015

6.       Date on which issuer notified

16 OCTOBER 2015

7.       Threshold(s) that is/are crossed or reached

BELOW 5%

8.       Notified details

(A)         Voting rights attached to shares

Number of voting rights – Direct – 299,010 – 0.079%

Number of voting rights – Indirect – 18,397,362 – 4.881%

(B)         Financial Instruments

              N/A

(C)         Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument - N/A

Exercise Price – N/A

Expiration date – N/A

Exercise/conversion period – N/A

Number of voting rights instrument refers to – N/A

Percentage of voting rights –                 Nominal – N/A Delta – N/A

Total A + B + C

Number of voting rights – 18,696,372

Percentage of voting rights – 4.960%

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

COLUMBIA MANAGEMENT INVESTMENT ADVISERS, LLC (0.333%)

THREADNEEDLE ASSET MANAGEMENT LIMITED (4.627%)

COLUMBIA MANAGEMENT INVESTMENT ADVISERS, LLC IS WHOLLY OWNED BY AMERIPRISE FINANCIAL, INC.

THREADNEEDLE ASSET MANAGEMENT LIMITED IS WHOLLY OWNED BY TC FINANCING LIMITED, WHICH IS ITSELF WHOLLY OWNED BY THREADNEEDLE ASSET MANAGEMENT HOLDINGS LIMITED, WHICH IS ITSELF WHOLLY OWNED BY TAM UK HOLDINGS LIMITED, WHICH IS ITSELF WHOLLY OWNED BY THREADNEEDLE HOLDINGS LIMITED,  WHICH IS ITSELF WHOLLY OWNED BY THREADNEEDLE ASSET MANAGEMENT HOLDINGS SARL, WHICH IS ITSELF WHOLLY OWNED BY AMERIPRISE INTERNATIONAL HOLDINGS GMBH, WHICH IS ITSELF WHOLLY OWNED BY AMERIPRISE FINANCIAL, INC.

PROXY VOTING

10.     Name of the proxy holder

N/A

11.     Number of voting rights proxy holder will cease to hold

N/A

12.     Date on which proxy holder will cease to hold voting rights

N/A

13.     Additional Information

THE SHARES REFERRED TO IN SECTION 9 OF THIS FORM ARE HELD IN PORTFOLIOS AND FUNDS MANAGED ON A DISCRETIONARY BASIS BY THE ENTITIES SET OUT IN SECTION 4.

PLEASE note that the Shares are held through certain nominee companies.

14.     Contact name

MARK POWNEY, THREADNEEDLE GROUP

15.     Contact telephone number

01793 363135

Notification authorised by:

LORRAINE SPROULE, DEPUTY COMPANY SECRETARY

19 OCTOBER 2015