Invesco Ltd., et al. – ‘SC 13G’ on 2/13/08 re: Ballard Power Systems, Inc.

On:  Wednesday, 2/13/08, at 8:43pm ET   ·   As of:  2/14/08   ·   Accession #:  950129-8-919   ·   File #:  5-53905

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Statement of Beneficial Ownership   —   Schedule 13G
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: SC 13G      Statement of Beneficial Ownership                      4     24K 
 2: EX-99.1     Joint Filing Agreement                                 3     16K 

SC 13G   —   Statement of Beneficial Ownership
Document Table of Contents

SC 13G
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UNITED STATES 
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

 Under the Securities Exchange Act of 1934

 (Amendment No. _ )*

Ballard Power Systems Inc.
--------------------------------------------------------------------------------
(Name of Issuer)

Common Stock
--------------------------------------------------------------------------------
(Title of Class of Securities)

 05858H104
--------------------------------------------------------------------------------
(CUSIP Number)

 December 31, 2007
--------------------------------------------------------------------------------
 (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule 
is filed:                                                                       

[ X ]    Rule 13d-1(b)                                        

[   ]   Rule 13d-1(c)                                         

[   ]   Rule 13d-1(d)                                         

*The remainder of this cover page shall be filled out for a reporting person's  
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the       
disclosures provided in a prior cover page.                                     

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of   
1934 ("Act") or otherwise subject to the liabilities of that section of the Act 
but shall be subject to all other provisions of the Act (however, see the       
Notes).                                                                         

SC 13G
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SCHEDULE 13G

                                                        [Enlarge/Download Table]

CUSIP No.         05858H104                                                                                                  
                                                                                                                             
---------------------------------------------------------------------------------------------------------------------------- 

          1.   Names of Reporting Persons.  I.R.S.  Identification Nos. of above                                             
               persons (entities only).                                                                                      
               Invesco Ltd.                                                                                                  

                           Invesco National Trust Company                                                                    
                           PowerShares Capital Management LLC                                                                
                           PowerShares Capital Management Ireland LTD                                                        

---------------------------------------------------------------------------------------------------------------------------- 

          2.   Check the Appropriate Box if a Member of a Group (see                                                         
               Instructions)                                                                                                 
               (a)                                                                                                           
               (b)                                                                                                           

---------------------------------------------------------------------------------------------------------------------------- 

          3.   SEC Use Only  ___________________________                                                                     

---------------------------------------------------------------------------------------------------------------------------- 

          4.   Citizenship or Place of Organization                                                                          
               Invesco Ltd.  -- Bermuda                                                                                      
                           Invesco National Trust Company -- US                                                              
                           PowerShares Capital Management LLC - US                                                           
                           PowerShares Capital Management Ireland LTD - Ireland                                              

---------------------------------------------------------------------------------------------------------------------------- 

                                    5.      Sole Voting Power 7,272,474: Such                                                
                                            shares are held by the following                                                 
                                            entities in the respective amounts                                               
                                            listed:                                                                          

                                                     PowerShares Capital Management LLC -- 7,267,836                         
                                                     PowerShares Capital Management Ireland LTD -- 4,638                     

Number of Shares           --------------------------------------------------------------------------------------------------
Beneficially Owned                                                                                                           
by Each Reporting                   6.      Shared Voting Power       ______-0-______                                        
Person With                                                                                                                  

                           --------------------------------------------------------------------------------------------------

                                    7.      Sole Dispositive Power 7,274,474: Such                                           
                                            shares are held by the following                                                 
                                            entities in the respective amounts                                               
                                            listed:                                                                          

                                                     Invesco National Trust Company -- 2,000                                 
                                                     PowerShares Capital Management LLC -- 7,267,836                         
                                                     PowerShares Capital Management Ireland LTD -- 4,638                     

                           --------------------------------------------------------------------------------------------------

                                    8.      Shared Dispositive Power     ______-0-______                                     

---------------------------------------------------------------------------------------------------------------------------- 

          9.   Aggregate Amount Beneficially Owned by Each Reporting Person:                                                 
               7,274,474                                                                                                     

---------------------------------------------------------------------------------------------------------------------------- 

          10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares                                              
               (See Instructions) N/A                                                                                        

---------------------------------------------------------------------------------------------------------------------------- 

          11.  Percent of Class Represented by Amount in Row (9)        6.33%                                                
                                                                        ----                                                 

---------------------------------------------------------------------------------------------------------------------------- 

          12.  Type of Reporting Person (See Instructions)                                                                   
               IA, HC. See Items 2 and 3 of this statement.                                                                  

SC 13G
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SCHEDULE 13G

Item 1(a)         Name of Issuer:                                               
Ballard Power Systems Inc.          

Item 1(b)         Address of Issuer's Principal Executive Offices:              
 4343 North Fraser Way
Burnaby, BC V5J 5J9 
Canada              

Item 2(a)         Name of Person Filing:                                        
Invesco Ltd.                                

                 In accordance with Securities and Exchange Commission Release
               No. 34-39538 (January 12, 1998), this statement on Schedule
           13G or amendment thereto is being filed by Invesco Ltd.
               ("Invesco"), a Bermuda Company, on behalf of itself and its
                 subsidiaries listed in Item 4 of the cover of this statement.
         Invesco through such subsidiaries provides investment
                 management services to institutional and individual investors
worldwide.                                  

      Executive officers and directors of Invesco or its
                 subsidiaries may beneficially own shares of the securities of
                  the issuer to which this statement relates (the "Shares"), and
               such Shares are not reported in this statement. Invesco and
            its subsidiaries disclaim beneficial ownership of Shares
             beneficially owned by any of their executive officers and
                 directors. Each of Invesco's direct and indirect subsidiaries
             also disclaim beneficial ownership of Shares beneficially
owned by Invesco and any other subsidiary.  

Item 2(b)         Address of Principal Business Office:                         
1360 Peachtree Street NE                    
Atlanta, GA 30309                           
United States                               

Item 2(c)         Citizenship:                                                  
    See the response to Item 2(a) of this statement.

Item 2(d)         Title of Class of Securities:                                 
Common Stock, .01 par value per share       

Item 2(e)         CUSIP Number:                                                 
05858H104                                   

Item 3            If this statement is filed pursuant to ss240.13d-1(b) or      
              240.13d-2(b) or (c), check whether the person filing is a:

(e) [x] An investment adviser in accordance with section    
240.13d-1(b)(1)(ii)(E)                                                          

         (g) [x] A parent holding company or control person in accordance with
section 240.13d-1(b)(1)(ii)(G)                                                  

              As noted in Item 2 above, Invesco is making this filing on
           behalf of its subsidiaries listed herein. Each of these
                entities is either an investment adviser registered with the
                  United States Securities and Exchange Commission under Section
              203 of the Investment Advisers Act of 1940, as amended, or
           under similar laws of other jurisdictions. Invesco is a
holding company.                            

SC 13G
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Item 4            Ownership:                                                    
          Please see responses to Items 5-8 on the cover of this
          statement, which are incorporated herein by reference.

Item 5            Ownership of Five Percent or Less of a Class:                 

                  If this statement is being filed to report the fact that as of
             the date hereof the reporting person has ceased to be the
              beneficial owner of more than five percent of the class of
securities, check the following             
[ ]                                         

Item 6            Ownership of More than Five Percent on Behalf of Another      
Person:                                     
N/A                                         

Item 7            Identification and Classification of the Subsidiary Which     
                 Acquired the Security Being reported on By the Parent Holding
Company:                                    
              Please see Item 3 of this statement, which is incorporated
herein by reference.                        

Item 8            Identification and Classification of Members of the Group:    
N/A                                         

Item 9            Notice of Dissolution of a Group:                             
N/A                                         

Item 10           Certification:                                                
                By signing below I certify that, to the best of my knowledge
                  and belief, the securities referred to above were acquired and
            are held in the ordinary course of business and were not
            acquired and are not held for the purpose of or with the
                  effect of changing or influencing the control of the issuer of
            the securities and were not acquired and are not held in
                 connection with or as a participant in any transaction having
that purpose or effect.                     

Signature:                                  
                After reasonable inquiry and to the best of my knowledge and
            belief, I certify that the information set forth in this
statement is true, complete and correct.    

                                                    02/09/2008
                                                     ---------------------------
                                                  Date

                                      Invesco Ltd.

                                                 By:   /s/ Lisa Brinkley
                                                     ---------------------------

                                       Lisa Brinkley
                                                    Global Compliance Director

Dates Referenced Herein   and   Documents Incorporated by Reference

				Referenced-On Page
This ‘SC 13G’ Filing		Date		First		Last			Other Filings
Filed as of:		2/14/08							5,  SC 13G,  SC 13G/A
Filed on:		2/13/08							13F-HR,  6-K,  SC 13G,  SC 13G/A
		12/31/07		1					10-K,  11-K,  13F-HR,  4,  40-F,  5,  6-K
		1/12/98		3
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