Oxford Metrics Regulatory News (OMG)

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

OMG  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 financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

An event changing the breakdown of voting rights

Other (please specify):___________________________________________

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

Herald Investment Management Limited

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

(1) Bank of New York (OCS) Nominees Ltd on behalf of Herald Investment Trust Plc

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

3rd April 2009

6. Date on which issuer notified:

7th April 2009

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

10%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares 

 if possible using the ISIN CODE

Situation previous to the Triggering transaction 

Resulting situation after the triggering transaction

Number of Shares 

Number of Voting Rights viii

Number of shares 

Number of voting rights ix

% of voting rights

Indirect

Direct x

Indirect xi

Direct

Indirect

GB0030312788

6,351,750

(9.74%)

6,351,750

 6,601,750 (10.13%)

6,601,750

10.13%

B: Financial Instruments

Resulting situation after the triggering transaction xii

Type of financial instrument 

Expiration date xiii

Exercise/ Conversion Period/ Date xiv 

Number of voting rights that may be acquired if the instrument is exercised/ converted. 

% of voting rights

None

Nil

Total (A+B)

Number of voting rights

% of voting rights

6,601,750

10.13%

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

Herald Investment Management Limited, a discretionary investment manager, is the parent undertaking of an investment management business.

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:

Andrew Miller

15. Contact telephone number:

020 7553 6308

A: Identity of the person or legal entity subject to the notification obligation

Full name (including legal form for legal entities)

Herald Investment Management Limited

Contact address (registered office for legal entities)

10/11 Charterhouse Square

London  EC1M 6EE

Phone number 

020 7553 6308

Other useful information (at least legal representative for legal persons)

Andrew Miller

B:  Identity of the notifier, if applicable xvii

Full name 

See Above

Contact address 

Phone number 

Other useful information (e.g. functional relationship with the person or legal entity subject to the notification obligation)

C: Additional information

In accordance with the FSA's LIST Issue 14 Paragraph 3.13 we have used the company's last notification of the total number of voting rights in issue (65,190,166) made on 30 Sep 08 through RNS number 7081E to calculate the percentage of voting rights after the triggering transaction.