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 ACQUISITION OF VOTING RIGHTS 3. Full name of person(s) subject to notification obligation APG ALGEMENE PENSIOEN GROEP NV 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 orreached 17 SEPTEMBER 2013 6. Date on which issuer notified 18 SEPTEMBER 2013 7. Threshold(s) that is/are crossed or reached ABOVE 3% 8. Notified details (A) Voting rights attached to shares Number of voting rights - Direct - 11,253,239 - 3% Number of voting rights - Indirect - N/A (B) Financial Instruments N/A (C) Financial Instruments with similar economic effect to Qualifying FinancialInstruments 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 - 11,253,239 Percentage of voting rights - 3% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable APG ALGEMENE PENSIOEN GROEP NV - 11,253,239 (3%) PROXY VOTING 10. Name of the proxy holder APG ALGEMENE PENSIOEN GROEP NV 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 MARTIJN SNOEK 15. Contact telephone number +31 20 604 8168 Notification authorised by: Robbie M B Brown, Company Secretary

18 SEPTEMBER 2013