Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

 IDOX Plc

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

Yes

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

No

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

No

An event changing the breakdown of voting rights

No

Other (please specify):

No

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

 ISIS EP LLP

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

No underlying client holds over 3%

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

18/01/2013

6. Date on which issuer notified:

21/01/2013

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

7% & 6%

8. Notified details:

A: Voting rights attached to shares

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

 Ord GBP0.01

26,133,334

7.51%

17,433,334

5.0%

 GB0002998192

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/ConversionPeriod

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exerciseprice

Expirationdate

Exercise/Conversionperiod

Number of votingrights instrumentrefers to

% of voting rights

Nominal

Delta

 Nil

Nil

Total (A+B+C)

Number of voting rights

Percentage of voting rights

 17,433,334

5.0%

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

ISIS EP LLPNo underlying client holds over 3%Registered name: Chase Nominees Limited

Proxy Voting:

10. Name of the proxy holder:

 ISIS EP LLP

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:

 Karen Huxley

15. Contact telephone number:

 020 7506 5643