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 October 2006 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 16th October 2006 Re: Holding in Company A Letter from The Capital Group Companies, Inc dated 13th October 2006 to Ryanair Holdings Plc, received by Ryanair Holdings Plc on the 13th October 2006. Re: Section 67 Notification Company Secretary: Enclosed is a Section 67 Notification dated 12 October 2006. Please note that one or more of the affiliates of The Capital Group Companies, Inc. have made notifications to your company pursuant to Section 67 in the past. For a description of our organisation, please visit our Web site at www.capgroup.com. For the purposes of this notification an outstanding share balance of 771,729,697 shares was used to calculate the percentages of holdings of the relevant share capital which determine the notifiable interest. We believe this outstanding share balance is current; however, if this number is not accurate, please contact us as soon as possible so we may make the necessary revisions to this notification. Should you have questions or require additional information, please contact Gina Martinez or Vivien Tan at (213) 615 -0469, or send a fax message to (213) 486-9698. Alternatively, you may contact us via E-mail at GRGroup@capgroup.com. Vivian Tan Compliance Associate The Capital Group Companies, Inc. A Letter from The Capital Group Companies, Inc. to Ryanair Holdings Plc dated 12 October 2006 Notification of Interests (Section 67 Companies Act 1990) This Notice is given by The Capital Group Companies, Inc. on behalf of its affiliates, including Capital Research and Management Company, Capital International,Inc., Capital International S.A., Capital Guardian Trust Company, and Capital International Limited, pursuant to Section 67 of the Companies Act, 1990. The interest in the relevant share capital indicated below arises by virtue of holdings attributed to the Companies (see Schedule A). These holdings form part of funds managed on behalf of investment clients by the Companies. Share capital to which this relates: Ordinary Shares (including ADRs) Number of shares in which the Companies have a notifiable interest: 70,196,826 Ordinary Shares (including ADRs) Name(s) of registered holder(s): See Schedule B As of 12 October 2006 Ryanair Holdings Plc Schedule A Schedule of holdings in Ryanair Holdings, Plc As of 12 October 2006 Holdings by CG Management Companies and Funds: Number of Shares Percent of Outstanding The CAPITAL GROUP COMPANIES INC ("cg") HOLDINGS 70,196,826 9.096% Capital Guardian Trust Company 5,396,300 0.699% Capital International Limited 5,694,608 0.738% 1,050,835 0.136% Capital International S.A. Capital International Inc 257,788 0.033% Capital Research and Management Company 57,797,295 7.489% EuroPacific Growth Fund 34,479,500 4.468% Schedule of holdings in Ryanair Holdings, Plc As of 12 September 2006 CAPITAL GUARDIAN TRUST COMPANY Registered Name Local Shares Cede & Co 5,202,000 55 Water Street New York, NY 10006 Alibank Nominees Limited 194,300 Allied Irish Bank, Stock Exchange and Trust Services Bank Centre, P.O.Box 512 Dublin, Ballsbridge Total 5,396,300 Schedule B CAPITAL INTERNATIONAL LIMITED Registered Name Local Shares Bank of New York Nominees 609,823 Bank of New York 3 Birchin Lane London EC3V 9BY Northern Trust 346,954 C/O NorTrust Nominees Limited 155 Bishopsgate London EC2M 3XS Cede & Co 236,690 55 Water Street New York NY 10006 Citibank London 83,330 11 Old Jewry London EC2R 8D8 UK Nortrust Nominees 34,434 155 Bishopsgate London EC2M 3XS United Kingdom Bank of Ireland 921,845 Intl Financial Services Centre 1 Harbourmaster Place Dublin 1 Allied Irish Bank Plc 903,243 Stock Exchange and Trust Services Bank Centre, P.O. Box 512 Ballsbridge, Dublin 4 State Street London Ltd 360,900 12-13 Nicholas Ln London EC4N 78N MSS Nominees Limited 94,400 Midland Bank Plc Mariner House, Pepys London EC3N 4DA State Street Bank & Trust Co 51,686 Deutsche Bank AG 22,200 23 Great Winchester Street London EC2P 2AX United Kingdom Mellon Bank N.A. 5,600 London Branch London United Kingdom Alibank Nominees Limited 967,043 Allied Irish Bank, Stock Exchange and Trust Services Bank Centre, P.O. Box 512 Dublin, Ballsbridge Bank of Ireland Nominees Limited 583,700 Bank of Ireland International Financial Services Center 1 Harbourmaster Place AIB Custodial Nominees Limited 154,300 Clydesdale Bank PLC 11,800 JP Morgan Chase Bank 306,660 Total 5,694,608 Capital International S.A Registered Name Local Shares Cede & Co 781,435 55 Water Street New York NY 10006 Bank of Ireland 11,400 Intl Financial Services Centre 1 Harbourmaster Place Dublin 1 Bank of Ireland Nominees Limited 249,000 Bank of Ireland Intl Financial Services Centre 1 Harbourmaster Place JP Morgan Chase Bank 9,000 Total 1,050,835 Schedule B Capital International, Inc Registered Name Local Shares Cede & Co 143,000 55 Water Street New York, NY 10006 Alibank Nominees Limited 114,788 Allied Irish Bank, Stock Exchange and Trust Services Bank Centre, PO Box 512 Dublin, Ballsbridge Total 257,788 Schedule B Capital Research and Management Company Registered Name Local Shares Cede & Co 57,797,295 55 Water Street New York, NY 10006 Total 57,797,295 This announcement has been issued through the Companies Announcement Service of the Irish Stock Exchange. 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: 16 October 2006 By:___/s/ James Callaghan____ James Callaghan Company Secretary & Finance Director