Treasury Stock

HALMA plcTREASURY SHARE TRANSACTION

Halma plc announces that on 21 September 2012, it purchased 80,000 ordinary shares of 10p each at a price of 444.5p per share. The highest price and the lowest price paid was 444.5p per share.

This represents 0.02 per cent of the issued share capital of the Company.

The purchased shares will not be subject to cancellation and will all be held as treasury shares in order to satisfy awards under the Halma plc Performance Share Plan 2005.

In accordance with Disclosure and Transparency Rule 5.6.1, following this purchase Halma plc holds 809,732 shares as treasury shares and the total number of voting rights (shares in issue excluding shares held as treasury shares) is 377,860,240.

Contact for further information:

Carol ChesneyCompany Secretary, Halma plcTel: +44 (0)1494 721111

A copy of this announcement, together with other information about Halma, may be viewed on its website: www.halma.com