SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 6-K


                        Report of Foreign Private Issuer


                       Pursuant to Rule 13a-16 or 15d-16
                     of the Securities Exchange Act of 1934


                           For the month of May, 2005

                              RYANAIR HOLDINGS PLC
                (Translation of registrant's name into English)

                     c/o Ryanair Ltd Corporate Head Office
                                 Dublin Airport
                             County Dublin Ireland
                    (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 whether the registrant by furnishing the information 
contained in this Form 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- ________ 



Ryanair Holdings Plc

06 May 2005


Re: Holding in Company


A Letter from Wellington Management Company, IIp dated 06th May 2005 to Ryanair
Holdings Plc, received by Ryanair Holdings on the 06th May 2006.


                                                      75 State Street
Wellington Management Company, llp                    Boston
                                                      Massachusetts 02109

                                                      Telephone: (617) 951-5000
                                                      Fax: (617) 951-5250


6 May 2005

Company Secretary
Mr. Jim Callaghan
Ryanair Holdings plc
C/O Ryanair Ltd Corporate Head Office
Dublin Airport
County Dublin
Ireland L2


Re:  Notification concerning interests in shares of Ryanair Holdings plc 
     (the "Company")


Dear Mr. Callaghan:


1
Wellington Management Company, LLP ("Wellington Management") is registered as an
investment adviser with the United States Securities and Exchange Commission and
acts as discretionary investment manager on behalf of various separate accounts
(the "Accounts") that hold an interest in shares of the Company.  Wellington
Management's interest in the shares is as an investment manager, as is mentioned
in Sections 67(1) and 77(4)(B) of the Companies Act 1990(the "Act").  The
Accounts do not act as a group nor do they act in concert with respect to the
interests in shares.  Wellington Management acquired the interests in shares for
the Accounts in its capacity as discretionary investment manager to, and solely
for the benefit of, the Accounts, and the interests were acquired solely for
investment purposes.  The shares are registered in the name of the Accounts or
the Accounts' custodians or nominees according to their respective holdings.


2
Wellington Management as discretionary investment manager on behalf of various
separate accounts, has purchased, in the aggregate, 1,392,892 ordinary shares
and 13,069,187 ADR shares. On a converted basis, this represents the equivalent
of 66,738,827 ordinary shares, or 8.85% of the shares outstanding, of the
Company. This is a decrease of 0.31% since our notification on 31 January 2005.
Therefore, Wellington Management hereby gives notice to the Company of such
interest in shares, pursuant to the provisions of Sections 67(1) and 77(4)(B) of
the Act.


Mr. Jim Callaghan
6 May 2005
Page Two


3
This  notice  is  given  in  fulfillment  of,  and for the  express  purpose  of
discharging the obligations imposed on us by, Sections 67(1) and 77(4)(B) of the
Act and arising out of the circumstances referred to in paragraph 2.


If you have any questions or comments, please do not hesitate to contact me at
617-790-7745.


Regards,

Julie A. Jenkins
Vice President and Counsel
Wellington Management Company, llp



                                   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, hereunto duly authorized.

                                    RYANAIR HOLDINGS PLC

 
Date:  06 May 2005
                                    By:___/s/ Howard Millar____

                                    H Millar
                                    Company Secretary & Finance Director