Treasury Stock

HALMA p.l.c.TREASURY SHARE TRANSACTION

Halma p.l.c. announces that, as the final part of a routine purchase totalling 250,000 ordinary shares and subsequent to purchases of 102,931 shares on 7 February and 65,000 shares on 8 February 2012, it purchased a further 82,069 shares on 9 February 2012 through J.P. Morgan Cazenove at an average price of 374.8725p per share.

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 p.l.c. Performance Share Plan 2005 ('PSP').

Following the above transaction Halma p.l.c. holds 1,404,269 ordinary shares as treasury shares. The total number of ordinary shares in issue (excluding shares held as treasury shares) is 377,022,228.

Contact for further information:

Carol ChesneyCompany Secretary, Halma p.l.c.Tel: +44 (0)1494 721111

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