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