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
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                        Commission File Number 001-13908
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                                  AMVESCAP PLC
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                 (Translation of registrant's name into English)

                 30 Finsbury Square, London EC2A 1AG, ENGLAND
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                    (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):
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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
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Description of document filed:  NOTIFICATION OF MAJOR INTEREST IN SHARES
                                ----------------------------------------



AMVESCAP PLC
IMMEDIATE RELEASE  9 MAY 2005
CONTACT:  MICHAEL PERMAN  TEL: 020 7065 3942


                                   SCHEDULE 10

                    NOTIFICATION OF MAJOR INTERESTS IN SHARES


1)        Name of company AMVESCAP PLC

2)        Name of shareholder having a major interest


          AVIVA PLC and Morley Fund Management Limited (a subsidiary of AVIVA)

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 SHAREHOLDER 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



          REGISTERED HOLDERS                    NUMBER OF SHARES HELD
                                                                                
          BNY Norwich Union Nominees Ltd        4,644,757 (Material)  AVIVA and Morley
          BT Globenet Nominees Ltd                  6,300 (Material)  "      "      "
          Chase GA Group Nominees Ltd          15,192,522 (Material)  "      "      "
          Chase Nominees Ltd                        3,705 (Material)  "      "      "
          CUIM Nominee Ltd                      4,081,366 (Material)  "      "      "



5)        Number of shares/amount of stock acquired     -

6)        Percentage of issued class                    -

7)        Number of shares/amount of stock disposed     860,000

8)        Percentage of issued class                    0.106%

9)        Class of security                             25P ORDINARY SHARES

10)       Date of transaction                           5 MAY 2005

11)       Date company informed                         9 MAY 2005

12)       Total holding following this notification     23,928,650 - AVIVA 
                                                        and Morley

13)       Total percentage holding of issued class
          following this notification                   2.95% AVIVA and Morley

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     9 MAY 2005







                                   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  9 May, 2005                   By   /s/  Michael S. Perman
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                                                (Signature)

                                            Michael S. Perman
                                            Company Secretary