SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934

                                (Amendment No.)*

                               FACET BIOTECH CORP
          ____________________________________________________________
                                (Name of issuer)

                                  Common Stock
           ___________________________________________________________
                         (Title of class of securities)

                                    30303Q103
                ________________________________________________
                                 (CUSIP number)


                                 Seth A. Klarman
                            The Baupost Group, L.L.C.
                         10 St. James Avenue, Suite 1700
                           Boston, Massachusetts 02116
                                 (617) 210-8300

                                 With a copy to:

                            Gregory D. Sheehan, Esq.
                                Ropes & Gray LLP
                             One International Place
                           Boston, Massachusetts 02110

           __________________________________________________________
           (Name, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)

                               April 8, 2009
          _____________________________________________________________
            (Dates of Events which Require Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to
report the acquisition that is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check
the following box [].
NOTE: Schedules filed in paper format shall include a signed original
and five copies of the schedule, including all exhibits. See Rule 13d-7
for other parties to whom copies are to be sent.
* 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
disclosures provided in a prior cover page.
The information required on 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 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 13D

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1.        NAME OF REPORTING PERSONS
          The Baupost Group, L.L.C.

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2.        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP       (a)   [ ]
          (See Instructions)                                     (b)   [X]

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3.        SEC USE ONLY

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4.        SOURCE OF FUNDS
          OO

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5.        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEM 2(d) or 2(e)                                                [ ]

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6.        CITIZENSHIP OR PLACE OF ORGANIZATION
          Massachusetts

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NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7.     SOLE VOTING POWER 0


8.     SHARED VOTING POWER  4,374,407


9.     SOLE DISPOSITIVE POWER    0


10.    SHARED DISPOSITIVE POWER   4,374,407



11.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
          4,374,407


12.       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES (See Instructions)  [ ]



13.       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)  17.80%*


14.       TYPE OF REPORTING PERSON (See Instructions)
          IA
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* The percentage ownership in the Issuer's Common Stock, $0.01 par value,
is based upon 24,578,158 issued and outstanding shares as reported by the
Issuer in its filing on Form 10-Q for the fiscal quarter ended December 31,
2008.




                                  SCHEDULE 13D

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1.        NAME OF REPORTING PERSONS
          Baupost Value Partners, L.P.-IV

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

2.        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP         (a)  [ ]
          (See Instructions)                                       (b)  [X]

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3.        SEC USE ONLY

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4.        SOURCE OF FUNDS
          OO

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5.        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEM 2(d) or 2(e)                                                [_]

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6.        CITIZENSHIP OR PLACE OF ORGANIZATION
          Delaware

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NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:


7.     SOLE VOTING POWER   0


8.     SHARED VOTING POWER    1,544,415


9.     SOLE DISPOSITIVE POWER     0


10.    SHARED DISPOSITIVE POWER    1,544,415


11.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
          1,544,415


12.       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES (See Instructions) [ ]


13.       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)   6.28%*


14.       TYPE OF REPORTING PERSON (See Instructions) PN
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(*) The percentage ownership in the Issuer's Common Stock, $0.01 par value,
is based upon 24,578,158 issued and outstanding shares as reported by the
Issuer in its filing on Form 10-Q for the fiscal quarter ended December 31,
2008.


                                  SCHEDULE 13D

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1.        NAME OF REPORTING PERSONS*
          SAK Corporation

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2.        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP          (a)   [ ]
          (See Instructions)                                        (b)   [X]

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3.        SEC USE ONLY

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4.        SOURCE OF FUNDS
          N/A

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5.        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEM 2(d) or 2(e)                                               [ ]

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6.        CITIZENSHIP OR PLACE OF ORGANIZATION
          Massachusetts

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NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7.    SOLE VOTING POWER    0


8.    SHARED VOTING POWER  4,374,407


9.    SOLE DISPOSITIVE POWER    0


10.    SHARED DISPOSITIVE POWER    4,374,407


11.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       4,374,407


12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES (See Instructions) [ ]


13.       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)   17.80%*


14.       TYPE OF REPORTING PERSON (See Instructions)    HC
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(*) The percentage ownership in the Issuer's Common Stock, $0.01 par value,
is based upon 24,578,158 issued and outstanding shares as reported by the
Issuer in its filing on Form 10-Q for the fiscal quarter ended December 31,
2008.

     * This  statement  on Schedule  13D is being  jointly  filed by The Baupost
Group, L.L.C. ("Baupost"),  Baupost Value Partners, L.P.-IV, SAK Corporation and
Seth A.  Klarman.  Baupost is a  registered  investment  adviser  and acts as an
investment  adviser to certain investment  limited  partnerships,  including and
Baupost Value Partners,  L.P. IV. SAK Corporation is the Manager of Baupost. Mr.
Klarman,  as the  sole  director  and  sole  officer  of SAK  Corporation  and a
controlling person of Baupost,  may be deemed to have beneficial ownership under
Section  13(d)  of the  Securities  Exchange  Act  of  1934  of  the  securities
beneficially owned by Baupost. Securities reported on this statement on Schedule
13D as being  beneficially  owned by Baupost  include  securities  purchased  on
behalf of various investment limited  partnerships,  including and Baupost Value
Partners, L.P.-IV.
     Pursuant to Rule 13d-4,  Seth A. Klarman and SAK  Corporation  declare that
the filing of this statement on Schedule 13D shall not be deemed an admission by
either or both of them that they are,  for the  purposes  of  Sections  13(d) or
13(g) the  beneficial  owner of any  securities  covered  by this  statement  on
Schedule  13D, and further  state that neither of them have any power to vote or
dispose  of, or direct  the  voting or  disposition  of, or direct the voting or
disposition of, any of the securities covered by this statement on Schedule 13D.



                                  SCHEDULE 13D

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1.        NAME OF REPORTING PERSONS*
          Seth A. Klarman

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

2.        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a)  [ ]
          (See Instructions)                                         (b)  [X]

---------------------------------------------------------- ------------------
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3.        SEC USE ONLY

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4.        SOURCE OF FUNDS
          N/A

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5.        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
          ITEM 2(d) or 2(e)                                               [ ]

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6.        CITIZENSHIP OR PLACE OF ORGANIZATION
          United States of America

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NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:

7.     SOLE VOTING POWER     0


8.     SHARED VOTING POWER  4,374,407


9.     SOLE DISPOSITIVE POWER    0


10.    SHARED DISPOSITIVE POWER    4,374,407


11.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      4,374,407

12.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES (See Instructions)  [ ]


13.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)    17.80%*



14.       TYPE OF REPORTING PERSON (See Instructions)
          HC
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 (*) The percentage ownership in the Issuer's Common Stock, $0.01 par value,
is based upon 24,578,158 issued and outstanding shares as reported by the
Issuer in its filing on Form 10-Q for the fiscal quarter ended December 31,
2008.

     * This  statement  on Schedule  13D is being  jointly  filed by The Baupost
Group, L.L.C. ("Baupost"),  Baupost Value Partners, L.P.-IV, SAK Corporation and
Seth A.  Klarman.  Baupost is a  registered  investment  adviser  and acts as an
investment  adviser to certain investment  limited  partnerships,  including and
Baupost Value Partners,  L.P. IV. SAK Corporation is the Manager of Baupost. Mr.
Klarman,  as the  sole  director  and  sole  officer  of SAK  Corporation  and a
controlling person of Baupost,  may be deemed to have beneficial ownership under
Section  13(d)  of the  Securities  Exchange  Act  of  1934  of  the  securities
beneficially owned by Baupost. Securities reported on this statement on Schedule
13D as being  beneficially  owned by Baupost  include  securities  purchased  on
behalf of various investment limited  partnerships,  including and Baupost Value
Partners, L.P.-IV.
     Pursuant to Rule 13d-4,  Seth A. Klarman and SAK  Corporation  declare that
the filing of this statement on Schedule 13D shall not be deemed an admission by
either or both of them that they are,  for the  purposes  of  Sections  13(d) or
13(g) the  beneficial  owner of any  securities  covered  by this  statement  on
Schedule  13D, and further  state that neither of them have any power to vote or
dispose  of, or direct  the  voting or  disposition  of, or direct the voting or
disposition of, any of the securities covered by this statement on Schedule 13D.


Item 1.  Security and Issuer.

     This statement on Schedule 13D (the  "Schedule  13D") relates to the common
stock, par value $0.01, (the "Common Stock") of Facet Biotech  Corporation,
a Delaware  corporation (the "Issuer").  The principal  executive offices of the
Issuer are located at 1400 Seaport Boulevard, Redwood City, CA 94063.

Item 2.  Identity and Background.

(a)-(c); (f)
     This  Schedule  13D is being  jointly  filed by The Baupost  Group,  L.L.C.
("Baupost"),  a Massachusetts  limited  liability  company,  a Delaware  limited
partnership,  Baupost  Value  Partners,L.P.-IV  ("BVPIV"),  a  Delaware  limited
partnership,  SAK Corporation ("SAK"), a Massachusetts corporation,  and Seth A.
Klarman (together with Baupost, BVPIV and SAK, the "Reporting Persons").

     Baupost is a  registered  investment  adviser.  The  principal  business of
Baupost  is to  act as an  investment  adviser  to  certain  investment  limited
partnerships (the "Investment Funds"),  including BVPIV, and securities reported
on this Schedule 13D as being  beneficially  owned by Baupost include securities
purchased on behalf of such Investment Funds. SAK is the Manager of Baupost. Mr.
Klarman,  a United  States  citizen,  is the sole  director  and the  President,
Treasurer and Secretary of SAK and a controlling person of Baupost.

     As the sole  director and sole officer of SAK and a  controlling  person of
Baupost,  Mr. Klarman may be deemed to have  beneficial  ownership under Section
13(d)  of the  Securities  Exchange  Act of 1934  (the  "Exchange  Act")  of the
securities  beneficially owned by Baupost.  Pursuant to Exchange Act Rule 13d-4,
Mr.  Klarman and SAK  Corporation  declare that the filing of this  Schedule 13D
shall not be deemed an  admission  by either or both of them that they are,  for
the  purposes of Sections  13(d) or 13(g) of the Exchange  Act,  the  beneficial
owner of any  securities  covered by this  Schedule  13D, and further state that
neither  of them have any power to vote or  dispose  of, or direct the voting or
disposition  of, or direct the voting or  disposition  of, any of the securities
covered by this Schedule 13D.

     The address of the principal  business and principal  office of each of the
Reporting  Persons is 10 St. James  Avenue,  Suite 1700,  Boston,  Massachusetts
02116. The Reporting Persons are filing jointly, and the agreement among them to
file  jointly  is  attached  hereto  as  Exhibit  A and  incorporated  herein by
reference.  The execution and filing of such joint filing agreement shall not be
construed as an admission that the Reporting Persons are a group, or have agreed
to act as a group.

(d)-(e)
     None of the  Reporting  Persons  has  during  the last five  years (i) been
convicted in a criminal  proceeding  (excluding  traffic  violations  or similar
misdemeanors)  or (ii) been a party to any civil  proceeding  of a  judicial  or
administrative  body of competent  jurisdiction as a result of which such person
was or is  subject  to a  judgment,  decree  or  final  order  enjoining  future
violations  of, or prohibiting  or mandating  activities  subject to, federal or
state securities laws or finding any violation with respect to such laws.

Item 3.  Source and Amount of Funds or Other Consideration.

     The total amount of funds used for the purchases of shares of Common Stock,
as reported in Item 5(c), was  $1,751,007.40.  The source of funds for purchases
of shares is the capital of the Investment Funds.
Item 4.  Purpose of Transaction.

     The shares were acquired for investment in the ordinary course of business.
Although  the  Reporting  Persons  intend  from  time to time  to  discuss  with
management  issues  about the Issuer and its  strategic  direction,  none of the
Reporting  persons has any plans or  proposals  which would result in any of the
following:

(a) The acquisition by any person of additional securities of the Issuer, or
the disposition of securities of the Issuer;

(b) An extraordinary corporate transaction, such as a merger, reorganization
or liquidation, involving the Issuer or any of its subsidiaries;

(c) A sale or transfer of a material amount of assets of the Issuer or any of
its subsidiaries;

(d) Any change in the present board of directors or management of the Issuer,
including any plans or proposals to change the number or term of directors or
to fill any existing vacancies on the board;

(e) Any material change in the present capitalization or dividend policy of
the Issuer;

(f) Any other material change in the Issuer's business or corporate structure;

(g) Changes in the Issuer's charter, bylaws or instruments corresponding
thereto or other actions that may impede the acquisition of control of the
Issuer by any person;

(h) Causing a class of securities of the Issuer to be delisted from a national
securities exchange or to cease to be authorized to be quoted in an
inter-dealer quotation system of a registered national securities association;

(i) A class of equity securities of the Issuer becoming eligible for
termination of registration pursuant to Section 12(g)(4) of the Exchange Act;
or

(j) Any action similar to any of those enumerated above.

         In general,  the Reporting  Persons will review their investment in
the Common Stock from time to time and depending upon factors such as the
financial performance of the Issuer, the availability and price of the
Common Stock or other securities related to the Issuer, and other
general market and investment conditions, the Reporting Persons may
determine to:

  o  acquire additional Common Stock through open market purchases or otherwise;

  o  sell, trade, engage in short selling of, hedge, or enter into any
     similar transactions with respect to the Common Stock through the
     open market or otherwise; or

  o  engage or participate in a transaction with the purpose or effect of
     changing or influencing the control of the Issuer.


Such transactions, if they occur at all, may take place at any time and
without prior notice.

Item 5.  Interest in Securities of the Issuer.

(a)-(b)  The responses to Items 7 - 13 of the cover pages of this Schedule 13D
 are incorporated herein by reference.

(c)  The trading dates, number of shares of Common Stock purchased or sold,
and the price per share for all transactions by the Reporting Persons in the
shares of Common Stock within the last 60 days, are set forth
below:

------------------- ------------------------- ---------------------------------
Name                Date                Price                  Number of Shares
                                        Per Share             Purchased/(Sold)*
------------------- ------------------------- ---------------------------------
Baupost             02/12/2009           $6.30                        106,600
BVPIV               02/12/2009           $6.30                         53,800

Baupost             03/17/2009           $7.10                        100,000
BVPIV               03/17/2009           $7.10                         49,400

Baupost             03/17/2009           $7.133                        50,000
BVPIV               03/17/2009           $7.133                        24,800

Baupost             03/18/2009           $7.192                           200
BVPIV               03/18/2009           $7.192                           200



     * Securities  reported  above as purchased  by Baupost  include  securities
purchased on behalf of various Investment Funds, including BVPIV. Therefore, the
number of shares  reported above as purchased by Baupost  includes the number of
shares reported above as purchased by BVPIV.

(d)      No other person has the right to receive or the power to direct the
receipt of dividends from, or the proceeds from the sale of, the shares of
Common Stock set forth above.

(e)      Not applicable.

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect
to Securities of the Issuer.

         [There are no contracts, arrangements, understandings or relationships
(legal or otherwise) among the Reporting Persons or, to the knowledge of any
of the Reporting Persons, any other person or entity referred to in Item 2,
or between such persons and any other person, with respect to any securities
of the Issuer, including, but not limited to, transfer or voting of any of the
securities, finder's fees, joint ventures, loan or option arrangements, puts
or calls, guarantees of profits, division of profits or loss, or the giving or
withholding of proxies.]

Item 7.  Material to be Filed as Exhibits.

A.       Joint Filing Agreement dated as of April 8, 2009 by and among
         Baupost, BVPIV, SAK and Seth A. Klarman.



                                   SIGNATURES

         After reasonable inquiry and to the best of their knowledge and
belief, the undersigned certify that the information set forth in this
Schedule 13D is true, complete, and correct.

Dated:  April 8, 2009

                                          THE BAUPOST GROUP, L.L.C.



                                           By:     /s/ Seth A. Klarman
                                           Name:    Seth A. Klarman
                                           Title:   President



                                          BAUPOST VALUE PARTNERS, L.P.-IV


                                          By:    The Baupost Group, L.L.C., its
                                                   managing general partner


                                          By:      /s/ Seth A. Klarman
                                          Name:    Seth A. Klarman
                                          Title:   President


                                          SAK CORPORATION


                                           By:      /s/ Seth A. Klarman
                                           Name:    Seth A. Klarman
                                           Title:   President



                                                 /s/ Seth A. Klarman
                                                 Seth A. Klarman



                                                                      Exhibit A

                             JOINT FILING AGREEMENT

     In accordance with Rule  13d-1(k)(1)  under the Securities  Exchange Act of
1934, as amended, each of the undersigned Reporting Persons hereby agrees to the
joint filing,  along with all other such Reporting Persons, on behalf of each of
them of a statement on Schedule 13D (including  amendments thereto) with respect
to shares of Common Stock,  $0.01 par value per share,  of Facet Biotech  Corp.,
and that this  Agreement  be included as an Exhibit to such joint  filing.  This
Agreement  may be  executed  in any number of  counterparts,  all of which taken
together shall constitute one and the same instrument.  The execution and filing
of this Agreement  shall not be construed as an admission  that the  undersigned
Reporting Persons are a group, or have agreed to act as a group.

         IN WITNESS WHEREOF, each of the undersigned hereby executes this
Agreement as of this 8th day of April, 2009.

                                          THE BAUPOST GROUP, L.L.C.



                                                /s/Seth A. Klarman
                                           By: --------------------------------
                                           Name:    Seth A. Klarman
                                           Title:   President



                                          BAUPOST VALUE PARTNERS, L.P.-IV


                                          By:    The Baupost Group, L.L.C., its
                                                   managing general partner

                                                /s/Seth A. Klarman
                                          By:  --------------------------------
                                          Name:    Seth A. Klarman
                                          Title:   President


                                           SAK CORPORATION

                                                /s/Seth A. Klarman
                                           By:  -------------------------------
                                           Name:    Seth A. Klarman
                                           Title:   President


                                                /s/Seth A. Klarman
                                                -------------------------------
                                                 Seth A. Klarman