Porvair Regulatory News (PRV)

For immediate release 4 October 2011

Porvair plc

("Porvair" or the "Company")

Issue of equity and Directors' shareholdings

The Company was notified on 3 October 2011 of the following exercises of options over ordinary Porvair shares of 2 pence each ("Porvair Shares") by Ben Stocks, Chief Executive Officer, and Chris Tyler, Group Finance Director, pursuant to the Porvair 2008 Save As You Earn scheme.

Following these dealings, Ben Stocks is interested in 131,553 Porvair Shares, representing approximately 0.3 per cent. of the Company's issued share capital, and Chris Tyler is interested in 65,250 Porvair Shares, representing approximately 0.2 per cent. of the Company's issued share capital.

The Company has also been notified by other option holders of the exercise of options over a further 33,007 Porvair Shares in aggregate.

As a result of the above exercises of options, the Company has today issued in aggregate 56,507 new Porvair Shares. Following the issue of the new Porvair Shares, the Company will have 42,482,147 ordinary shares in issue. Since the Company holds no shares in treasury, the total number of voting rights in the Company will be 42,482,147.

For further information, please contact: