Net Asset Value(s)

Impax Environmental Markets plc announces that as at the close of business on 11 May 2006 its net asset value (NAV) was £148.545 million, representing an undiluted NAV per ordinary share of 116.42p. The diluted NAV per ordinary share (assuming full conversion of all outstanding warrants) was 113.29p. The investments in the Company's portfolios have been valued at bid prices in the above calculations. ---END OF MESSAGE---
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