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

ACQUIISITION OF VOTING RIGHTS

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

BLACKROCK, INC

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

N/A

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

5 MAY 2017

6.       Date on which issuer notified

8 MAY 2017

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

Voting rights attached to shares holding for BlackRock Investment Management (UK) Limited has gone below 5%

Total holding for BlackRock, Inc. remains above 5%

8.       Notified details

(A)         Voting rights attached to shares

Number of voting rights – Direct – N/A

Number of voting rights – Indirect – 29,860,788 – 7.79%

(B)         Financial Instruments

              Securities Lending - 4,853,088 – 1.26%

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

Resulting situation after the triggering transaction

Type of financial instrument - CFD

Exercise Price – N/A

Expiration date – N/A

Exercise/conversion period – N/A

Number of voting rights instrument refers to – 281,283

Percentage of voting rights –                          Nominal – 0.07%        Delta – 0.07%

Total A + B + C

Number of voting rights – 34,995,159

Percentage of voting rights – 9.13%

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

Name	% of voting rights if it equals or is higher than the notifiable threshold	% of voting rights through financial instruments if it equals or is higher than the notifiable threshold	Total of both if it equals or is higher than the notifiable threshold
BlackRock Investment Management (UK) Limited	4.97%	0.82%	5.79%

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

BLACKROCK REGULATORY THRESHOLD REPORTING TEAM

14.     Contact name

MARC-OLIVER LESCH

15.     Contact telephone number

020 7743 3650

Notification authorised by:

LORRAINE SPROULE, DEPUTY COMPANY SECRETARY

9 MAY 2017