Regenersis PLC : Notification of Major Interest in Shares - Impax Asset Management 03 Jan 12

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARESi

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached: ii	Regenersis 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):	N/A
3. Full name of person(s) subject to the notification obligation: iii	IMPAX ASSET MANAGEMENT LIMITED
4. Full name of shareholder(s) (if different from 3.):iv	Impax Environmental Markets plc Impax Environmental Markets Ireland The Environment Agency Fund
5. Date of the transaction and date on which the threshold is crossed or reached: v	23 December 2011
6. Date on which issuer notified:	30 December 2011
7. Threshold(s) that is/are crossed or reached: vi, vii	10%

8. Notified details:
A: Voting rights attached to shares viii, ix
Class/type of shares if possible using the ISIN CODE	Situation previous to the triggering transaction	Resulting situation after the triggering transaction
Class/type of shares if possible using the ISIN CODE	Number of Shares	Number of Voting Rights	Number of shares	Number of voting rights	% of voting rights x
Class/type of shares if possible using the ISIN CODE	Number of Shares	Number of Voting Rights	Direct	xi Direct	xii Indirect	Direct	Indirect
GB00B06GNN57	4,495,514	10.0301%	4,455,514	N/A	4,455,514	N/A	9.9408%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date xiii	Exercise/ Conversion Period xiv	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights
NIL

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments xv, xvi
Resulting situation after the triggering transaction
Type of financial instrument	Exercise price	Expiration date xvii	Exercise/ Conversion period xviii	Number of voting rights instrument refers to	% of voting rights xix, xx
NIL					Nominal	Delta
NIL

Total (A+B+C)
Number of voting rights	Percentage of voting rights
4,455,514	9.9408%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable: xxi
Impax Environmental Markets plc (2,713,479 shares 6.0541%) Impax Environmental Markets Ireland (1,292,035 shares 2.8827%) The Environment Agency Fund (450,000 shares 1.0040%)
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:	Michael Knight Compliance Officer
15. Contact telephone number:	[phone]