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 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 orreached 28 NOVEMBER 2014 6. Date on which issuer notified 1 DECEMBER 2014 7. Threshold(s) that is/are crossed or reached ABOVE 4% 8. Notified details (A) Voting rights attached to shares Number of voting rights - Direct - N/A Number of voting rights - Indirect - 15,049,692 - 4.012% (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 - 15,049,692 Percentage of voting rights - 4.012% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable CAPITAL GUARDIAN TRUST COMPANY - 3,650,192 (0.973%) CAPITAL RESEARCH AND MANAGEMENT COMPANY (CAPITAL WORLD GROWTH AND INCOME FUND) - 11,399,500 (3.039%) 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 N/A 15. Contact telephone number N/A Notification authorised by: LORRAINE SPROULE, DEPUTY COMPANY SECRETARY

2 DECEMBER 2014