FORM 6-K
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16
of the Securities Exchange Act of 1934
29 July 2005
O2 plc
Wellington Street
Slough, Berkshire SL1 1YP, 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 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 ________
Enclosure:
Copy of announcement regarding Holding(s) in Company sent to the
London Stock Exchange on 29 July 2005
SCHEDULE 10
NOTIFICATION OF MAJOR INTERESTS IN SHARES
1. Name of company
O2 plc
2. Name of shareholder having a major interest
The Capital Group Companies, 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
In respect of 2 above
4. Name of the registered holder(s) and, if more than one holder, the number of
shares held by each of them
Capital Guardian Trust Company
Registered Name Number of Shares
Chase Nominees Limited 2,336,300
Woolgate House
Coleman Street
London EC2P 2HD
Nortrust Nominees 1,999,500
155 Bishopsgate
London EC2M 3XS
Mellon Nominees (UK) Limited 210,700
150 Buchanan Street
Glasgow G1 2DY
Capital International Limited
State Street Nominees Limited 2,373,560
Canary Wharf
27th Floor, 1 Canada Square
London E14 5AF
Bank of New York Nominees 46,614,602
Bank of New York
3 Birchin Lane
London
EC3V 9BY
Northern Trust 13,723,921
c/o NorTrust Nominees Limited
155 Bishopsgate
London EC2M 3XS
Chase Nominees Ltd 22,634,600
Woolgate House
Coleman Street
London EC2P 2HD
Midland Bank plc 1,372,200
5 Laurence
Poutney Hill
London EC4R OE
Bankers Trust 1,238,508
59 1/2 Southmark Street
2nd Floor
London SE1 OHH
Barclays Bank 1,182,100
Barclays Global Securities Services
8 Angel Court
London EC2R 7HT
Citibank London 3,024,369
11 Old Jewry
London EC2R 8D8
Morgan Guaranty 2,081,100
83 Pall Mall
London SW1Y 5ES
Nortrust Nominees 28,723,345
155 Bishopsgate
London EC2M 3XS
Royal Bank of Scotland 1,726,000
Regents House, 42 Islington High St
London N1 8XL
State Street Bank & Trust Co 8,765,573
Citibank 777,669
Deutsche Bank AG 8,624,829
23 Great Winchester Street
London EC2P 2AX
HSBC Bank plc 6,319,789
Securities Services
Mariner House
Pepys Street
London EC3N 4DA
Mellon Bank N.A. 3,718,100
London Branch
London
Northern Trust AVFC 1,247,714
South Africa
KAS UK 172,500
Kass Associate
PO Box 178
1000 AD Amsterdam
Mellon Nominees (UK) Ltd 937,200
150 Buchanan Street
Glasgow G1 2DY
Bank One London 1,749,900
Clydesdale Bank plc 96,200
Capital International S.A.:
Band of New York Nominees 117,400
Bank of New York
3 Birchin Lane
London EC3V 9BY
Chase Nominees Limited 4,177,877
Woolgate House
Coleman Street
London EC2P 2HD
Midland Bank plc 42,300
5 Laurence
Poutney Hill
EC4R OE
Royal Bank of Scotland 238,100
Regents House
42 Islington High Street
London N1 8XL
Lloyds Bank 152,800
Central Settlement Section
Branches Stock Office
34 Threadneedle Street
London
Citibank NA 94,000
Toronto
HSBC Bank plc 782,800
Securities Services
Mariner House
Pepys Street
Lndon EC3N 4DA
Capital International, Inc.:
State Street Nominees Limited 6,937,313
Canary Wharf
27th floor, 1 Canada Square
London E14 5AF
Bank of New York Nominees 2,849,229
Bank of New York
3 Birchin Lane
London EC3V 9BY
Northern Trust 199,100
c/o NorTrust Nominees Limited
155 Bishopsgate
London EC2M 3XS
Chase Nominees Limited 10,462,324
Woolgate House
Coleman Street
London EC2P 2HD
Midland Bank plc 180,900
5 Laurence
Poutney Hill
London EC4R 0E
Bankers Trust 65,900
59 1/2 Southmark Street
2nd Floor
London SE1 0HH
Citibank London 134,300
11 Old Jewry
London EC2R 8DB
Nortrust Nominees 783,500
155 Bishopsgate
London EC2M 9XS
State Street Bank & Trust Co. 2,315,994
Citibank 126,600
Citibank NA 1,569,806
Toronto
HSBC Bank plc 156,674
Securities Services
Mariner House
Pepys Street
London EC3N 4DA
JP Morgan Chase Bank 393,400
Capital Research and Management Company:
Chase Nominees Limited 20,521,400
Woolgate House
Coleman Street
London
EC2P 2HD
5. Number of shares / amount of stock acquired
N/A
6. Percentage of issued class
N/A
7. Number of shares / amount of stock disposed
380,956,100
8. Percentage of issued class
4.357%
9. Class of security
Ordinary shares of 0.1p each
10. Date of transaction
27 July 2005 - Date of Section 198 Notification
11. Date company informed
28 July 2005
12. Total holding following this notification
213,960,996
13. Total percentage holding of issued class following this notification
2.447%
14. Any additional information
Notification in respect of section 198 Companies Act 1985
15. Name of contact and telephone number for queries
Timothy Maw - 01753 628 293
16. Name and signature of authorised company official responsible for making
this notification
Timothy Maw
Date of notification
29 July 2005
The FSA does not give any express or implied warranty as to the accuracy of this
document or material and does not accept any liability for error or omission.
The FSA is not liable for any damages (including, without limitation, damages
for loss of business or loss of profits) arising in contract, tort or otherwise
from the use of or inability to use this document, or any material contained in
it, or from any action or decision taken as a result of using this document or
any such material.
SIGNATURE
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.
O2 plc
Date: 29 July 2005 By:___/s/ Robert Harwood___
ROBERT HARWOOD
Assistant Secretary