Excluding the effects of the Rights Offering, Wellington has control over 15.08% of oustanding shares.
Post rights offering the ownership control precentage jumps to 34.75%.
This report is for period ending October 31, 2012.
 
These guys are a major player and the ones who most likely pushed the "greens" over the top.
 
NATIONAL INSTRUMENT 62-103  
REPORT FILED BY ELIGIBLE INSTITUTIONAL 
INVESTOR UNDER PART 4
 
1.  Name and Address of Eligible Institutional Investor: 
Wellington Management Company, LLP 
Attn: Legal Services Department  
280 Congress Street  
Boston, MA 02210 USA  
 
 
2.    The net increase or decrease in the number or principal amount of securities, and in 
 the eligible institutional investor’s securityholding percentage in the class of securities, 
 since the last report filed by the eligible institutional investor under Part 4 or the early 
 warning requirements.  
3.  Designation and number or principal amount of securities and the securityholding 
 percentage of the eligible institutional investor in the class of securities at the end of 
 the month for which the report is made:  
 Wellington Management has dispositive power over 71,000,631 shares of common 
 stock, representing 34.75% of the shares outstanding of the common stock of the 
 Reporting Issuer. This is made up of 23,666,877 shares of common stock and 47,333,754 
 shares are part of the rights issued by the Relevant Issuer on a converted basis. The 
 rights convert into one common share and one warrant to purchase one common  share 
 of the Relevant Issuer. Prior to receiving the rights, Wellington Management held 
 15.08%. 
 (i)  ownership and control: nil 
 (ii) ownership, but control is held by other entities other than the eligible institutional 
       investor or any joint actor: nil   
 (iii) exclusive or shared control but does not have ownership  
NATIONAL INSTRUMENT 62-103  
REPORT FILED BY ELIGIBLE INSTITUTIONAL 
INVESTOR UNDER PART 4 
 1.  Name and Address of Eligible Institutional Investor: 
Wellington Management Company, LLP 
Attn: Legal Services Department  
280 Congress Street  
Boston, MA 02210 USA  
The number of common shares of Alberta Oilsands Inc. that are controlled by 
Wellington Management is greater than the number reported in its last report 
under Part 4 of National Instruments 62-103 by 44,772,554 shares filed for the 
month ended July 31, 2012, representing an increase in the securityholding 
percentage of 18.04%. Of these, 47,333,754 shares are the rights issued by the 
Relevant Issuer on a converted basis. The rights convert into one common share 
and one warrant to purchase one common share of the Relevant Issuer. Prior to 
receiving the rights, Wellington Management held 15.08% 
  4.   Designation and number or principal amount of securities held and the    
  percentage of the outstanding securities referred to in item 3 over which the 
  eligible institutional investor either alone or together with joint actors has:   Wellington Management has dispositive power over 71,000,631 shares of common 
 stock, representing 34.75% of the shares outstanding of the common stock of the 
 Reporting Issuer.  This is made up of 23,666,877 shares of common stock and 
 47,333,754  shares are part of the rights issued by the Relevant Issuer on a converted 
 basis. The rights convert into one common share and one warrant to purchase one 
 common share of the Relevant Issuer. Prior to receiving the rights, Wellington 
 Management held 15.08%. 
5. The purpose of the eligible institutional investor and any joint actors in acquiring or 
 disposing of ownership of, or control over the securities, including any future 
 intentions to acquire ownership of, or control over, additional securities of the 
 Relevant Issuer. 
6.  The general nature and material terms of any agreements, other than lending 
agreements with respect to the securities of the reporting issuer entered into by the 
eligible institutional investor or any joint actor, and the issuer of the securities or any 
other entity in connection with any transaction or occurrence resulting in the change in 
ownership or control giving rise to the report, including agreements with respect to 
the acquisition, holdings, disposition or voting of any of the securities:  
 None  
7.  The name of any joint actors in connection with the disclosure in this report:   
   
 None  
8.  Any change in any material fact set out in a previous report by the eligible     
 institutional investor:   
   
 None  
Wellington Management is an investment adviser registered with the Securities 
and Exchange Commission under Section 203 of the Investment Advisers Act of 
1940, as amended. Wellington Management, in its capacity as investment adviser, 
exercises discretionary authority over securities owned of record by investment 
advisory clients subject to general investment policies, guidelines, objectives and 
legal requirements of such clients. Wellington Management’s investment advisory 
clients acquired the securities which are the subject to this report for investment 
purposes. Depending upon the circumstances and the analysis that is undertaken 
by Wellington Management from time to time, Wellington Management’s 
investment advisory clients may acquire more common shares of the Reporting 
Issuer or may dispose of such shares.   9.         Eligibility:  
   
 I certify that Wellington Management Company, LLP is an eligible institutional 
 investor eligible to file reports under Part 4 of Proposed National Instrument 62-103.  
            Signature   
               
            John  D.  Norberg 
            Vice  President  and  Counsel 
            Name  and  Title   
             
      617-790-7265 
            Telephone   
             
      Wellington Management Company, LLP  
      Eligible Institutional Investor  
             
            Report  for  the  period  ending October 31, 2012