Impax Asset Management Regulatory News (IPX)

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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

Impax Group Plc 

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

An acquisition or disposal of voting rights 

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): Initial disclosure

X

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

Rathbone Brothers Plc

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

Rathbone Investment Management Ltd

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

8 May 2008

6. Date on which issuer notified:

9 May 2008

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

5%

8. Notified details: N/A

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

Number of shares 

Number of voting rights

% of voting rights

Direct

Indirect

Direct

Indirect

GB0004905260

Ord Shares 1p

4,953,500

4,953,500

N/A

N/A

6,193,500

N/A

5.66%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument 

Expiration date

Exercise/ Conversion Period/ Date 

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

% of voting rights

N/A

N/A

N/A

N/A

N/A

Total (A+B)

Number of voting rights

% of voting rights

6,193,500

5.66%

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

Rathbone Brothers Plc*

Rathbone Investment Management Ltd (5.66%)

Rathbone Brothers Plc is the holding company of the following.

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