Crawley, UK -- (MARKET WIRE) -- January 9, 2007 --
BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: SPIRENT EXECUTIVE SHARE OPTION SCHEME, 1995 Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 4,132,259 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ 2,179,199 ORDINARY SHARES OF 3 1/3p allotted under scheme during EACH period: Balance under scheme not yet issued 1,953,060 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 3,000,000 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 29 SEPTEMBER 2000 admission: 3,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 28 MAY 2004 3,500,000 ORDINARY SHARES OF 3 1/3p EACH DATED 14 MARCH 2006 Total number of securities in issue 975,851,486 ORDINARY SHARES OF 3 1/3 p EACH (885,599,999 WHEN at the end of the period : EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: U.S EMPLOYEE STOCK PURCHASE PLAN Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 1,237,364 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ NIL allotted under scheme during period: Balance under scheme not yet issued 1,237,364 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 435,000 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 5 JUNE 2001 admission: 3,500,000 ORDINARY SHARES OF 3 1/3p EACH DATED 1 NOVEMBER 2001 7,000,000 ORDINARY SHARES OF 3 1/3p EACH DATED 18 NOVEMBER 2002 1,800,000 ORDINARY SHARES OF 3 1/3p EACH DATED 6 DECEMBER 2004 Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: SPIRENT GLOBAL ALL EMPLOYEE SHARE PURCHASE PLAN Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 814,444 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ NIL allotted under scheme during period: Balance under scheme not yet issued 814,444 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 1,000,000 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 18 NOVEMBER 2002 admission: 700,000 ORDINARY SHARES OF 3 1/3 p EACH DATED 6 DECEMBER 2004 Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: NETCOM AMENDED AND RESTATED STOCK OPTION PLAN Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 1,526,887 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block 2,500,000 ORDINARY SHARES OF 3 1/3p scheme has been increased, if the EACH scheme has been increased since the date of the last return: Number of securities issued/ 966,154 ORDINARY SHARES OF 3 1/3p allotted under scheme during EACH period: Balance under scheme not yet issued 3,060,733 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 3,291,399 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 3 SEPTEMBER 1999 admission: 1,739,130 ORDINARY SHARES OF 3 1/3p EACH DATED 8 JULY 2002 6,722,689 ORDINARY SHARES OF 3 1/3p EACH DATED 8 OCTOBER 2002 2,500,000 ORDINARY SHARES OF 3 1/3p EACH DATED 19 OCTOBER 2006 Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: ZARAK AMENDED AND RESTATED STOCK OPTION PLAN Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 2,690,996 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ NIL allotted under scheme during period: Balance under scheme not yet issued 2,690,996 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 3,895,474 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 14 NOVEMBER 2000 admission: Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: SPIRENT SAVINGS RELATED SHARE OPTION SCHEME Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 68,185 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ NIL allotted under scheme during period: Balance under scheme not yet issued 68,185 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 200,000 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 31 DECEMBER 2003 admission: Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: SPIRENT STOCK INCENTIVE PLAN Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 3,863,831 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ 1,877,635 ORDINARY SHARES OF 3 1/3p allotted under scheme during EACH period: Balance under scheme not yet issued 1,986,196 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 3,720,930 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 1 OCTOBER 2003 admission: 3,703,703 ORDINARY SHARES OF 3 1/3p EACH DATED 2 OCTOBER 2003 Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3 p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. BLOCKLISTING SIX MONTHLY RETURN To: The FSA Date: 9 January 2007 Name of applicant: SPIRENT COMMUNICATIONS PLC Name of scheme: CAW AMENDED AND RESTATED STOCK OPTION PLAN Period of return: From: 1 JULY 2006 To: 31 DECEMBER 2006 Balance under scheme from previous 833,485 ORDINARY SHARES OF 3 1/3p return: EACH The amount by which the block NIL scheme has been increased, if the scheme has been increased since the date of the last return: Number of securities issued/ 18,365 ORDINARY SHARES OF 3 1/3p allotted under scheme during EACH period: Balance under scheme not yet issued 815,120 ORDINARY SHARES OF 3 1/3p /allotted at end of period: EACH Number and class of securities 1,300,000 ORDINARY SHARES OF 3 1/3p originally listed and the date of EACH DATED 15 AUGUST 2002 admission: 115,394 ORDINARY SHARES OF 3 1/3 p EACH DATED 28 AUGUST 2002 Total number of securities in issue 975,851,486 ORDINARY SHARES OF at the end of the period : 3 1/3p EACH (885,599,999 WHEN EXCLUDING TREASURY SHARES) Name of contact: Warren Nash Address of contact: Spirent Communications plc Spirent House Crawley Business Quarter Fleming Way Crawley, RH10 9QL Telephone number of contact: 01293 767676 SIGNED BY Warren Nash Director/company secretary/suitably experienced employee/duly authorised officer, for and on behalf of Spirent Communications plc Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. 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