Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES i 1. Identity of the issuer or the underlying issuer of existing shares to which SEGROvoting rights are attached:ii plc 2. Reason for the notification (please tick the appropriate box or boxes): An acquisition or disposal of voting rights x An acquisition or disposal of qualifying financial instruments which may resultin the acquisition of shares already issued to which voting rights are attached An acquisition or disposal of instruments with similar economic effect toqualifying financial instruments An event changing the breakdown of voting rights Other (please specify): 3. Full name of person(s) subject to the notification obligation:iii APG Asset Management N.V. 4. Full name of shareholder(s) (if different from 3.):iv 5. Date of the transaction and date on which the threshold iscrossed or reached: v 16 December 2014 6. Date on which issuer notified: 17 December 2014 7. Threshold(s) that is/are crossed or reached: vi, vii 6.00% 8. Notified details: A: Voting rights attached to shares viii, ix Class/type Situation previous Resulting situation afterof to the triggering the triggeringshares transaction transaction if Number Number % of votingpossible Number of Number of rights xusing of Voting of votingthe ISIN Shares Rights shares rightsCODE Direct Indirect Direct xi Indirect Direct Indirect xiiISIN GB 44,859,055 44,859,055 44,512,486 44,512,486 5.996%00B5ZN1N88 B: Qualifying Financial Instruments Resulting situation after the triggering transaction Type of financial Expiration Exercise/ Number of voting % of voting instrument date xiii Conversion Period xiv rights that may be rights acquired if the instrument is exercised/ converted. C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi Resulting situation after the triggering transaction Type of financial Exercise Expiration Exercise/ Number of voting % of voting instrument price date xvii Conversion rights instrument rights xix, xx period xviii refers to Nominal Delta Total (A+B+C) Number of voting rights Percentage of voting rights 44,512,486 5.996% 9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable: xxi 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: 14. Contact name: Stephanie Murton, Legal Counsel 15. Contact telephone number: +44 (0)20 7451 9082