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

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                                (Amendment No. _1__ )*


                               PDL BioPharma Inc.
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                                (Name of Issuer)


                                  Common Stock
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                         (Title of Class of Securities)


                                   69329Y104
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                                 (CUSIP Number)



                                January 31, 2006
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             (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).





                                  SCHEDULE 13G

CUSIP No.         69329Y104

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          1.   Names of Reporting Persons.  I.R.S.  Identification Nos. of above
               persons (entities only).
               AMVESCAP PLC
               AIM Advisors, Inc.
               AIM Capital Management, Inc.
               INVESCO Institutional (N.A.), Inc.
               INVESCO Taiwan Limited
               INVESCO Asset Management GmbH
               Atlantic Trust Company, N.A.

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

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          3.   SEC Use Only  _______________________________________________

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          4.   Citizenship or Place of Organization
               AMVESCAP PLC: England
               AIM Advisors, Inc.: United States
               AIM Capital Management, Inc.: United States
               INVESCO Institutional (N.A.), Inc.: United States
               INVESCO Taiwan Limited: Taiwan
               INVESCO Asset Management GmbH: Germany
               Atlantic Trust Company, N.A.: United States



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                        5.      Sole Voting Power 0 shares: Such
                                shares are held by the following
                                entities in the respective amounts
                                listed: AIM Advisors, Inc. 0 shares;
                                AIM Capital Management, Inc. 0 shares;
                                Atlantic Trust Company, N.A 0 shares;
                                INVESCO Asset Management GmbH 0 shares;
                                INVESCO Institutional (N.A.), Inc. 0
                                shares:
                                INVESCO Taiwan Limited 0 shares;


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

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                        7.      Sole Dispositive Power 0 shares: Such
                                shares are held by the following
                                entities in the respective amounts
                                listed: AIM Advisors, Inc. 0 shares;
                                AIM Capital Management, Inc. 0 shares;
                                Atlantic Trust Company, N.A 0 shares;
                                INVESCO Asset Management GmbH 0 shares;
                                INVESCO Institutional (N.A.), Inc. 0
                                shares:
                                INVESCO Taiwan Limited 0 shares;


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                        8.      Shared Dispositive Power     ______-0-______

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          9.   Aggregate  Amount  Beneficially  Owned by Each  Reporting  Person
               0 shares

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


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          11.  Percent of Class Represented by Amount in Row (9)        0.00%
                                                                        ----


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


                                  SCHEDULE 13G


Item 1(a)         Name of Issuer:
                  PDL BioPharma Inc.


Item 1(b)         Address of Issuer's Principal Executive Offices:
                     34801 Campus Drive
                  Fremont, CA  94555


Item 2(a)         Name of Person Filing:
                  AMVESCAP PLC

                  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 AMVESCAP PLC
                  ("AMVESCAP"), a U.K. entity, on behalf of itself and its
                  subsidiaries listed in Item 4 of the cover of this statement.
                  AMVESCAP through such subsidiaries provides investment
                  management services to institutional and individual investors
                  worldwide.

                  Executive officers and directors of AMVESCAP 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. AMVESCAP
                  and its subsidiaries disclaim beneficial ownership of Shares
                  beneficially owned by any of their executive officers and
                  directors. Each of AMVESCAP's direct and indirect
                  subsidiaries also disclaim beneficial ownership of Shares
                  beneficially owned by AMVESCAP and any other subsidiary.


Item 2(b)         Address of Principal Business Office:
                  30 Finsbury Square
                  London EC2A 1AG
                  England


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:
                  69329Y104


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, AMVESCAP 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.
                  AMVESCAP is a holding company.

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 [ X ]

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.


                                                     February 10, 2006
                                            ------------------------------------
                                                         Date

                                            AMVESCAP PLC

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


                                                Lisa Brinkley
                                            Chief Compliance Officer