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 September, 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: NOTIFICATION OF MAJOR INTERESTS IN SHARES ----------------------------------------- AMVESCAP PLC IMMEDIATE RELEASE 18 OCTOBER 2006 CONTACT: MICHAEL S PERMAN TEL: 020 7065 3942 NOTIFICATION OF MAJOR INTERESTS IN SHARES 1. Name of company AMVESCAP PLC 2. Name of shareholder having a major interest BARCLAYS PLC THROUGH THE LEGAL ENTITIES LISTED BELOW:- Holding Barclays Private Bank Ltd 350 Barclays Global Investors Ltd 6,773,720 Barclays Global Fund Advisors 2,806,590 Barclays Life Assurance Co Ltd 1,088,482 Barclays Global Investors Australia Ltd 64,676 Barclays Global Investors Japan Ltd 73,135 Barclays Capital Securities Ltd 5,274,445 Barclays Private Bank and Trust Ltd 2,900 Barclays Global Investors Canada Ltd 55,697 Gerrard Ltd 505,651 Barclays Global Investors, N.A. 5,153,854 Barclays Capital Inc 2,835,549 Barclays Global Investors Japan Trust & Bankin 841,124 Barclays Bank Trust Company Ltd 8,219 GROUP HOLDING 25,484,392 3. Please state whether notification indicates that it is in respect of holding of the shareholder named in 2 above or in respect of a non-beneficial interest or in the case of an individual holder if it is a holding of that person's spouse or children under the age of 18. NOTIFICATION IS IN RESPECT OF THE SHAREHOLDERS NAMED IN 2 ABOVE. 4. Name of the registered holder(s) and, if more than one holder, the number of shares held by each of them - 5. Number of shares/amount of stock acquired NOT STATED 6. Percentage of issued class NOT STATED 7. Number of shares/amount of stock disposed - 8. Percentage of issued class - 9. Class of security ORDINARY SHARES 10. Date of transaction 13 OCTOBER 2006 11. Date company informed 18 OCTOBER 2006 12. Total holding following this notification 25,484,392 13. Total percentage holding of issued class following this notification 3.078% 14. Any additional information - 15. Name of contact and telephone number for queries MICHAEL S PERMAN TEL: 020 7065 3942 16. Name and signature of authorised company official responsible for making this notification Michael S Perman AMVESCAP PLC COMPANY SECRETARY Date of notification 18 OCTOBER 2006 The FSA does not give any express or implied warranty as to the accuracy of this document or material and does not accept any liability for error or omission. The FSA is not liable for any damages (including, without limitation, damages for loss of business or loss of profits) arising in contract, tort or otherwise from the use of or inability to use this document, or any material contained in it, or from any action or decision taken as a result of using this document or any such material. Registered Holder Account Holding Designation Bank of New York 52,603 Barclays Capital Nominees Limited 867,293 Barclays Capital Nominees Limited 4,727,801 Barclays Capital Securities Ltd 546,644 Barclays Capital Securities Ltd 1,968,256 Barclays Global Investors Canada 55,697 Barclays Trust Co & Others 4,441 Barclays Trust Co R69 C 000000000000000000 3,778 Chase Nominees L 16376 413,162 Chase Nominees Ltd 28270 273,518 Gerrard Nominees Limited 630871 400 Gerrard Nominees Limite 652198 5,000 Gerrard Nominees Limited 660758 2,000 Gerrard Nominees Limited 770101 6,440 Greig Middleton nominees Limited (GM1) 63,005 Investors Bank and Trust Co. 4,629,931 Investors Bank and Trust Co. 2,806,590 JP Morgan (BGI Custody) 16331 199,248 JP Morgan (BGI Custody) 16338 48,417 JP Morgan (BGI Custody) 16341 443,560 JP Morgan (BGI Custody 16342 109,408 JP Morgan (BGI Custody) 16400 6,296,620 JP Morgan (BGI Custody) 17011 14,331 JP Morgan (BGI Custody) 18408 63,938 JPMorgan Chase Bank 64,676 JPMorgan Chase Bank 24,527 JPMorgan Chase Bank 841,124 JPMorgan Chase Bank 52,292 Mellon Trust - US CUSTODIAN/ 29,773 Mitsui Asset 12,921 R C Greig Nominees Limited 203,773 R C Greig Nominees Limited GP1 20,459 R C Greig Nominees Limited SA1 11,628 R C Greig Nominees Limited a/c AK1 142,780 R C Greig Nominees Lim BL1 31,046 R C Greig Nominees Limited a/c CM1 19,120 Reflex Nominees Limited 2,900 STATE STREET BANK AND TRUST CO 70,557 STATE STREET BOSTON 346,463 Trust & Custody Services Bank 7,922 Zeban Nominees Limited 350 TOTAL 25,484,392 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 19 October, 2006 By /s/ Michael S. Perman ----------------- -------------------------- (Signature) Michael S. Perman Company Secretary