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, 2005 --------- 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 31 MAY 2005 CONTACT: ANGELA TULLY TEL: 020 7065 3652 SCHEDULE 10 NOTIFICATION OF MAJOR INTERESTS IN SHARES 1) Name of company AMVESCAP PLC 2) Name of shareholder having a major interest AIC Limited, AIC Investment Services Inc., Mutual Funds Managed by AIC Limited and Accounts Managed by AIC Investment Services Inc. 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 HOLDINGS OF AIC LIMITED and AIC INVESTMENTS SERVICES INC. AGGREGATED WITH HOLDINGS OF MUTUAL FUNDS MANAGED BY AIC LIMITED AND ACCOUNTS MANAGED BY AIC INVESTMENT SERVICES INC. 4) Name of the registered holder(s) and, if more than one holder, the number of shares held by each of them NAME ORDINARY SHARES 5) Number of shares/amount of stock Acquired - 6) Percentage of issued class -% 7) Number of shares/amount of stock disposed NOT DISCLOSED 8) Percentage of issued class -% 9) Class of security ORDINARY SHARES 10) Date of transaction NOT DISCLOSED 11) Date company informed 30 MAY 2005 12) Total holding following this notification 24,175,676 13) Total percentage holding of issued class following this notification 2.98% 14) Any additional information See Attachment A 15) Name of contact and telephone number for queries ANGELA TULLY TEL: 020 7065 3652 16) Name and signature of authorised company official responsible for making this notification A. TULLY AMVESCAP PLC ASSISTANT COMPANY SECRETARY Date of Notification 31 MAY 2005 ATTACHMENT A AIC Limited ("AIC") is a corporation incorporated under the laws of Ontario. AIC's wholly owned subsidiary AIC Investment Services Inc. ("AISI") is the portfolio manager of certain accounts (including the Funds and other investment advisor accounts) and AIC is the manager and trustee of certain mutual funds in Ontario (collectively the "Funds") which are owners of record of the securities of the AMVESCAP PLC ("AMVESCAP"). AISI is qualified to act as an investment adviser to the Funds in Ontario, Canada pursuant to a registration under the Securities Act Ontario. AISI is registered as an investment adviser under Section 203 of the Investment Advisers Act of 1940. AIC as trustee of the Funds, shares with the Funds the power to direct the voting and disposition of the shares of the AMVESCAP held by the Funds. Michael Lee-Chin holds indirectly through his sole ownership of Portland Holdings Inc. approximately 95% of the voting equity securities of AIC and consequently he may be deemed under United States securities law to beneficially own the shares of the AMVESCAP held by AIC as trustee of the Funds and by the Funds, although he disclaims beneficial ownership of such holding. Mr. Lee-Chin is a citizen and resident of Canada. 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 31 May, 2005 By /s/ Angela Tully ------------ -------------------------- (Signature) Angela Tully Assistant Company Secretary