Genus plc

29 July 2011

BLOCK LISTING SIX MONTHLY RETURN

1. Name of company

Genus plc

2. Name of schemes

Genus plc 2004 Executive Share Option Plan

3. Period of return:

From 01.02.11 to 29.07.11

4. Balance of unallotted securities under scheme from previous return

Genus plc 2004 Executive Share Option Plan

427,090

TOTAL BALANCE

427,090

5.  Plus: The amount by which the block scheme has been increased since the date of the last return (if any increase has been applied for)

Nil.

6.  Less: Number of securities issued/allotted under scheme during period

Genus plc 2004 Executive Share Option Plan

12,626

TOTAL BALANCE

12,626

7.  Equals: Balance under scheme not yet issued/allotted at end of period 

Genus plc 2004 Executive Share Option Plan

414,464

TOTAL BALANCE

414,464

8. Number and class of securities originally listed and the date of admission

Genus plc 2004 Executive Share Option Plan

852,740 Ordinary Shares of 10p each  

- 6 March 2006     

  550,800 Ordinary Shares of 10p each   

- 26 July 2006

Name of contact: Cara Crichton, Assistant Company Secretary

Address of contact:

Belvedere House

Basing View

Basingstoke

Hampshire

RG21 4HG

Telephone number of contact: 01256 345996

Signed by Ian Farrelly

Group Company Secretary & General Counsel for and on behalf of

Name of applicant: Genus plc

If you knowingly or recklessly give false or misleading information you may be liable to prosecution.