Notification under Chapter 2 Section 9 of the Securities Market Act

Uponor Corporation    Stock exchange release  14 September 2007                 

Notification under Chapter 2 Section 9 of the Securities Market Act             

Uponor Corporation has received the attached two notifications from Capital     
Research and Management Company and Capital Group International, Inc., referred 
to in Chapter 2, Section 9 of the Securities Market Act on a change in holdings.
According to the notifications, the holdings of Capital Research and Management 
Company now represent over 5 per cent of the share capital and voting rights in 
Uponor Corporation, and that the aggregate holdings of the Capital Group        
Companies, Inc. and the Capital Group International, Inc. and its subsidiaries  
have fallen below 5 per cent of the share capital and voting rights in Uponor   
Corporation.                                                                    


For additional information, please contact:                                     
Jyri Luomakoski, CFO and Deputy CEO, tel. +358 40 515 4498                      
Pekka Holopainen, General Counsel, tel. +358 20 129 2835                        

Uponor Corporation                                                              

Tarmo Anttila                                                                   
Vice President, Communications                                                  
Tel. +358(0)20 129 2852                                                         



DISTRIBUTION                                                                    
Helsinki Stock Exchange                                                         
Media                                                                           
www.uponor.com                                                                  



ANNEX:                                                                          

CAPITAL RESEARCH AND MANAGEMENT COMPANY'S DISCLOSURE                            

13 September 2007                                                               

Financial Supervision                                                           
Kluuvikatu 5                                                                    
P.O.Box 159                                                                     
FIN-00101 Helsinki                                                              
Finland                                                                         

Uponor Oyj                                                                      
Kimmeltie 3                                                                     
FIN - 02110                                                                     
Espoo                                                                           
Finland                                                                         


Re: Notice under the Securities Market Act. Chapter 2.Section 9                 

Dear Sirs/Mesdames                                                              

The Finnish Financial Supervision Authority has on 12 September 2007 granted an 
exemption which allows The Capital Group Companies, Inc. (Taxpayer I.D.         
86-0206507) to report its holdings separately from the holdings of Capital      
Research and Management Company (“CRMC”) and its subsidiaries. The Capital Group
Companies, Inc., however, continues to report jointly with Capital Group        
International, Inc., and its subsidiaries. Pursuant to this exemption, we hereby
disclose the aggregated holdings of CRMC (Taxpayer I.D. 95-1411037).            

As of 12 September 2007, the holdings of CRMC now represent 5.7645% of the      
voting rights and share capital in Uponor Oyj. Under chapter 2, section 9, of   
the Securities Market Act, we hereby notify the Financial Supervision Authority 
and Uponor Oyj of the following:                                                

Name of the company in which holdings have been acquired: Uponor Oyj            
Date of change in holdings: 12 September 2007                                   
Exact proportion of voting rights and share capital in Uponor Oyj, by type of   
shares                                                                          

Holdings by Capital Research and Management Company are now as follows:         

--------------------------------------------------------------------------------
| Share Type                         | Shares              | % Held            |
--------------------------------------------------------------------------------
| Ordinary Shares                    | 4,220,000           | 5.7645%           |
--------------------------------------------------------------------------------
| Voting Rights Held (in total)      | 4,220,000           | 5.7645%           |
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
| Share Type                         | Shares              | % Held            |
--------------------------------------------------------------------------------
| Ordinary Shares                    | 4,220,000           | 5.7645%           |
--------------------------------------------------------------------------------
| Share Capital Held (in total)      | 4,220,000           | 5.7645%           |
--------------------------------------------------------------------------------


The share capital of Uponor Oyj comprises a total of 73,206,944 Ordinary Shares,
said shares entitling to a total of 73,206,944 votes.                           

Capital Research and Management Company                                         

Walter R. Burkley                                                               
Senior Counsel                                                                  





CAPITAL GROUP INTERNATIONAL, INC.'S DISCLOSURE                                  

13 September 2007                                                               

Financial Supervision                                                           
Kluuvikatu 5                                                                    
P.O.Box 159                                                                     
FIN-00101 Helsinki                                                              
Finland                                                                         

Uponor Oyj                                                                      
Kimmeltie 3                                                                     
FIN - 02110                                                                     
Espoo                                                                           
Finland                                                                         


Re: Notice under the Securities Market Act. Chapter 2.Section 9                 

Dear Sirs/Mesdames                                                              

The Finnish Financial Supervision Authority has on 12 September 2007 granted an 
exemption which allows The Capital Group Companies, Inc. (Taxpayer I.D.         
86-0206507) to report its holdings separately from the holdings of Capital      
Research and Management Company and its subsidiaries. The Capital Group         
Companies, Inc., however, continues to report jointly with Capital Group        
International, Inc. (“CGII), and its subsidiaries. Pursuant to this exemption,  
we hereby notify you that the aggregated holdings of The Capital Group          
Companies, Inc and CGII and its subsidiaries have fallen below 5 per cent of the
share capital and voting rights in Uponor Oyj.                                  

As of 12 September 2007, the holdings of CGII now represent 0.2262% of the      
voting rights and share capital in Uponor Oyj. Under chapter 2, section 9, of   
the Securities Markets Act, we hereby notify the Financial Supervision Authority
and Uponor Oyj of the following:                                                

Name of the company in which holdings have been acquired: Uponor Oyj            
Date of change in holdings: 12 September 2007                                   
Exact proportion of voting rights and share capital in Uponor Oyj, by type of   
shares                                                                          

Holdings by The Capital Group Companies, Inc. and CGII are now as follows:      

--------------------------------------------------------------------------------
| Share Type                         | Shares              | % Held            |
--------------------------------------------------------------------------------
| Ordinary Shares                    | 165,567             | 0.2262%           |
--------------------------------------------------------------------------------
| Voting Rights Held (in total)      | 165,567             | 0.2262%           |
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
| Share Type                         | Shares              | % Held            |
--------------------------------------------------------------------------------
| Ordinary Shares                    | 165,567             | 0.2262%           |
--------------------------------------------------------------------------------
| Share Capital Held (in total)      | 165,567             | 0.2262%           |
--------------------------------------------------------------------------------



The share capital of Uponor Oyj comprises a total of 73,206,944 Ordinary Shares,
said shares entitling to a total of 73,206,944 votes.                           

The Capital Group Companies, Inc.                                               

Walter R. Burkley                                                               
Senior Counsel