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

THE CAPITAL GROUP COMPANIES, INC.

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

SEE 9

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

13 OCTOBER 2015

6.       Date on which issuer notified

14 OCTOBER 2015

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

BELOW 3%

8.       Notified details

(A)         Voting rights attached to shares

Number of voting rights – Direct – N/A

Number of voting rights – Indirect – 11,129,387 – 2.952%

(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 – 11,129,387

Percentage of voting rights –  2.952%

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

CAPITAL RESEARCH AND MANAGEMENT COMPANY

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

N/A

14.     Contact name

CHRISTOPHER AQUINO

15.     Contact telephone number

[phone]

Notification authorised by:

LORRAINE SPROULE, DEPUTY COMPANY SECRETARY

15 OCTOBER 2015