SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER Pursuant to Rule 13a-16 or 15d-16 Under the Securities Exchange Act of 1934 For the month of May, 2006 ------------- Commission File Number 001-13908 --------- AMVESCAP PLC ------------------------------------------------ (Translation of registrant's name into English) 30 Finsbury Square, London EC2A 1AG, ENGLAND -------------------------------------------------------- (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. Form 20-F X Form 40-F ----- ----- Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ------ Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ------ Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934. Yes No X ------- ------- If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- N/A ------------- Description of document filed: Blocklisting Six Monthly Return ------------------------------- AMVESCAP PLC IMMEDIATE RELEASE 22 MAY 2006 BLOCKLISTING SIX MONTHLY RETURN INFORMATION PROVIDED ON THIS FORM MUST BE TYPED OR PRINTED ELECTRONICALLY. TO: The FSA Date: 22 May 2006 1. Name of applicant: AMVESCAP PLC 2. Name of scheme: AMVESCAP PLC EXECUTIVE SHARE OPTION SCHEME 3. Period of return: From: 8 NOVEMBER 2005 To: 7 MAY 2006 4. Balance under scheme from previous return: 5,846,420 ORDINARY SHARES 5. The amount by which the block scheme has been 0 increased, if the scheme has been increased since the date of the last return 6. Number of securities issued/allotted under 4,480,789 ORDINARY SHARES scheme during period: OF US$0.10 EACH 7. Balance under scheme not yet issued/allotted 1,365,631 ORDINARY SHARES at end of period OF US$0.10 EACH 8. Number and class of securities originally 12,000,000 ORDINARY listed and the date of admission SHARES OF 25P EACH LISTED ON 8 MAY 2002. 9. Total number of securities in issue at 822,490,215 the end of the period. Name of contact: ANGELA TULLY Address of contact: 30 FINSBURY SQUARE, LONDON EC2 Telephone number of contact: 020 7065 3652 SIGNED BY _A. Tully_____________________________________________ -------- Assistant Company Secretary, for and on behalf of AMVESCAP PLC______________________________________________ Name of applicant If you knowingly or recklessly give false or misleading information you may be liable to prosecution. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. AMVESCAP PLC ------------------------------ (Registrant) Date 22 May, 2006 By /s/ Angela Tully ------------ -------------------------- (Signature) Angela Tully Assistant Company Secretary