Aptitude Regulatory News (APTD)

22 Jan 2009 15:54

MICROGEN PLC22 JANUARY 2009 BLOCK LISTING RETURN Name of applicant: MICROGEN PLCName of scheme: MICROGEN PLC 1997 AND 1999 EXECUTIVE SHARE OPTION SCHEME MICROGEN PLC 1996 SAVINGS RELATED SHARE OPTION SCHEMEPeriod of return: From: 1 JULY 2008 To: 31 DECEMBER 2008

Balance under scheme from previous return:

MICROGEN PLC 1997 AND 1999 EXECUTIVE SHARE OPTION SCHEME - 345,500 ORDINARY SHARES OF 5P EACH

MICROGEN PLC 1996 SAVINGS RELATED SHARE OPTION SCHEME - 82,291 ORDINARY SHARES OF 5P EACH

The amount by which the block scheme hasbeen increased, if the scheme has beenincreased since the date of the last return: N/ANumber of securities issued/allotted underscheme during period:

MICROGEN PLC 1997 AND 1999 EXECUTIVE SHARE OPTION SCHEME - 10,000 ORDINARY SHARES OF 5P EACH

MICROGEN PLC 1996 SAVINGS RELATED SHARE OPTION SCHEME - 0 ORDINARY SHARES OF 5P EACH

Balance under scheme not yet issued/allottedat end of period

MICROGEN PLC 1997 AND 1999 EXECUTIVE SHARE OPTION SCHEME - 335,500 ORDINARY SHARES OF 5P EACH

MICROGEN PLC 1996 SAVINGS RELATED SHARE OPTION SCHEME - 82,291 ORDINARY SHARES OF 5P EACH

Number and class of securities originallylisted and the date of admission

MICROGEN PLC 1997 AND 1999 EXECUTIVE SHARE OPTION SCHEME - 800,000 ORDINARY SHARES OF 5P EACH

MICROGEN PLC 1996 SAVINGS RELATED SHARE OPTION SCHEME - 200,000 ORDINARY SHARES OF 5P EACH

15 APRIL 2005

Total number of securities in issue at the endof the period

86,830,192 ORDINARY SHARES OF 5P EACH

Name of contact: ANJUM SIDDIQI, COMPANY SECRETARYAddress of contact: FLEET HOUSE, 3 FLEETWOOD PARK, BARLEY WAY, HANTS, GU51 2QJ

Telephone number of contact: 01252 772 326

www.microgen.com