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 AMERIPRISE FINANCIAL, INC. AND ITS GROUP 4. Full name of shareholder(s) (if different from 3 above) SEE SECTION 13 - ADDITIONAL INFORMATION 5. Date of the transaction and date on which the threshold is crossed orreached 12 FEBRUARY 2014 6. Date on which issuer notified 13 FEBRUARY 2014 7. Threshold(s) that is/are crossed or reached ABOVE 5% 8. Notified details (A) Voting rights attached to shares Number of voting rights - Direct - 355,793- 0.095% Number of voting rights - Indirect - 18,587,591- 4.96% (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 - 18,943,384 Percentage of voting rights - 5.05% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable Ameriprise Financial, Inc., which through intermediate holding companiescontrols the voting rights of Columbia Management Investment Advisers, ColumbiaWanger Asset Management, Threadneedle Management Luxembourg S.A. andThreadneedle Asset Management Holdings Ltd, which itself controls the votingrights of Threadneedle Asset Management Ltd, Threadneedle International Ltd andThreadneedle Pensions Ltd 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 Littledown Nominees Ltd A/c ZLA08 26,813 Littledown Nominees Ltd A/c 39364 791,694 Ameriprise Financial Inc A/c 202,900 HSBC Global Custody Nominees (UK) A/c 5000212310 98,733Ltd Littledown Nominees Ltd A/c 75102 458,681 Vidacos Nominees Ltd A/c 6012918307 265,213 HSBC Global Custody Nominee (UK) A/c 847452 83,471Limited HSBC Global Custody Nominee (UK) A/c 740190 226,388Limited HSBC Global Custody Nominee (UK) A/c 739874 1,091,612Limited HSBC Global Custody Nominee (UK) A/c 740311 106,704Limited The Bank Of New York ( Nominees ) A/c PTG 15303 / 09997799 229,214Limited HSBC Global Custody Nominee (UK) A/c 811056 87,721Limited Chase Nominees Ltd A/c 44729 28,420 Nortrust Nominees LTD A/c BBH05 278,665 William & Glyns (Isle of Man) A/c 301780 95,100Nominees Ltd Littledown Nominees Ltd A/c ZLA03 6,667,779 Littledown Nominees Ltd A/c 07198 299,127 Littledown Nominees Ltd A/c 27642 56,666 Littledown Nominees Ltd A/c ZLA09 14,507 Littledown Nominees Ltd A/c 10479 7,746 Littledown Nominees Ltd A/c ZLA12 290,938 Littledown Nominees Ltd A/c ZLA14 86,001 Littledown Nominees Ltd A/c 07207 439,011 Mellon Nominees (UK) Ltd A/c WWSF0004002 515,286 Littledown Nominees Ltd A/c 10491 3,033,690 Littledown Nominees Ltd A/c 10488 1,645,021 Littledown Nominees Ltd A/c 10489 555,503 Littledown Nominees Ltd A/c 30337 169,524 Littledown Nominees Ltd A/c ZLA15 1,091,256 14. Contact name MARK POWNEY, THREADNEEDLE GROUP 15. Contact telephone number 01793 363135 Notification authorised by: ROBBIE M. B. BROWN, COMPANY SECRETARY

14 FEBRUARY 2014