SCHEDULE 13G
 
UNITED STATES 
 
SECURITIES AND EXCHANGE COMMISSION
 
Washington, DC 20549
 
 
SCHEDULE 13G
 
Under the Securities Exchange Act of 1934
 
(Amendment No.:    )*
 
UNISYS CORP
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(Name of Issuer) 
 
 
COMMON STOCK
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(Title of Class of Securities) 
 
909214108
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(CUSIP NUMBER) 
 
September 30, 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 (the "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). 
 
 
 
 

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CUSIP No.  909214108            13G
 
1. NAME OF REPORTING PERSON
   S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON 
 
BlackRock, Inc.
(on behalf of its investment advisory subsidiaries - See Item 7)

 
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP Joint Filing 
 
(a) [ ] 
(b) [ ] 
 
3. SEC USE ONLY 
 
4. CITIZENSHIP OR PLACE OF ORGANIZATION 
 
Delaware
 
NUMBER OF SHARES BENEFICALLY OWNED BY EACH REPORTING PERSON WITH 
 
5. SOLE VOTING POWER 
 
NONE
 
6. SHARED VOTING POWER 
 
35,833,746
 
7. SOLE DISPOSITIVE POWER 
 
NONE
 
8. SHARED DISPOSITIVE POWER 
 
35,833,746
 
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 
 
35,833,746 (ownership disclaimed pursuant to Rule 13d-4 of the 1934 Act)
 
10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
 
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 
 
10.42%
 
12. TYPE OF REPORTING PERSON 
 
HC, CO 
 

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12. TYPE OF REPORTING PERSON

SCHEDULE 13G
 
 
ITEM 1 (a) Name of Issuer: 
          ---------------- 
 

        UNISYS CORP (the "Company")
 

ITEM 1 (b) Address of Issuer's Principal Executive Offices: 
          ------------------------------------------------- 
 

         	Unisys Way
	Blue Bell, PA 19424
 

ITEM 2 (a) Name of Persons Filing: 
          ------------------------ 
         
         BlackRock, Inc. 
         (on behalf of its investment advisory subsidiaries - See Item 7)
 
          
 
ITEM 2 (b) Address of Principal Business Office or, if none, Residence: 
          ------------------------------------------------------------- 
 

BlackRock, Inc. 
40 East 52nd Street 
New York, NY 10022 


ITEM 2 (c) Citizenship: 
          ------------- 
See Item 4 of Cover Pages 
 
ITEM 2 (d) Title of Class Securities: 
          --------------------------- 
 
Common Stock 
 
ITEM 2 (e) CUSIP NUMBER: 
  
See Cover Page 
 

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ITEM 3 
 
   If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or
13d-2(c), check whether the person filing is a: 
 
(a) [ ] Broker or Dealer registered under Section 15 of the Act, 
(b) [ ] Bank as defined in Section 3(a) (6) of the Act, 
(c) [ ] Insurance Company as defined in Section 3(a) (19) of the Act,
(d) [ ] Investment Company registered under Section 8 of the Investment 
        Company Act of 1940,
(e) [X] Investment Adviser in accordance with Rule 13d-1(b) (1) (ii) (E), 
(f) [ ] Employee Benefit Plan or Endowment Fund in accordance with 
        Rule 13d-1(b) (ii) (F),
(g) [X] Parent Holding Company or Control Person in accordance with 
        Rule 13d-1(b) (ii) (G); see Item 7,
(h) [ ] A savings association as defined in Section 3(b) of the Federal 
        Deposit Insurance Act (12 U.S.C. 1813), 
(i) [ ] A church plan that is excluded from the definition of an 
        investment company under Section 3(c) (14) of the Investment
        Company Act of 1940,
(j) [ ] Group, in accordance with Rule 13d-1(b) (1) (ii) (J). 
 
ITEM 4 Ownership 
       --------
(a)  Amount Beneficially Owned:
 
     See Item 9 of Cover Pages.
 
(b)  Percent of Class: 
 
     See Item 11 of Cover Pages
 
(c)  Number of shares as to which such person has: 
 
     (i) sole power to vote or to direct the vote:
 
         See Item 5 of Cover pages
 
    (ii) shared power to vote or to direct the vote:
 
         See Item 6 of Cover pages
 
   (iii) sole power to dispose or to direct the disposition of:
 
         See Item 7 of Cover pages
 
    (iv) shared power to dispose or to direct the disposition of:
 
         See Item 8 of Cover pages





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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. 
       ---------------------------------------------------------------- 
  BlackRock, Inc. is a parent holding company for a number of  
investment management subsidiaries.  Certain of
these subsidiaries hold shares of the security which is the 
subject of this report. (See Item 7). 
 
ITEM 7 Identification and Classification of the Subsidiary Which 
  Acquired the Security Being Reported on by the Parent Holding Company
  or Control Person.
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   The following subsidiaries of BlackRock, Inc. are investment advisors
which hold shares of the security being reported;



BlackRock Advisors LLC
BlackRock Investment Management LLC
BlackRock Japan Co.Ltd
BlackRock Investment Management (UK) Ltd
State Street Research & Management Co.

 

ITEM 8 Identification and Classification of Members of the Group. 
       ----------------------------------------------------------
 
Not Applicable 
 
 
ITEM 9 Notice of Dissolution of Group. 
       -------------------------------
 
Not Applicable 
 

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ITEM 10 Certification
       --------------
 
   By signing below each of the undersigned certifies that, to the best
of their 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 such securities and 
were not acquired and are not held in connection with or as a participant 
in any transaction having such purpose or effect.

Signature. 
---------- 
 
   After reasonable inquiry and to the best of my knowledge and belief, 
each of the undersigned certifies that the information set forth in 
this statement is true, complete and correct. 
 
 
Date:  October 10, 2006
 
 
BlackRock, Inc. (on behalf of its investment advisory subsidiaries)
BlackRock Advisors LLC
BlackRock Investment Management LLC
BlackRock Japan Co.Ltd
BlackRock Investment Management (UK) Ltd
State Street Research & Management Co.


/s/ James DesMarais 

----------------------------- 
Name:  James DesMarais 
Title:  Attorney-In-Fact* 
 
 

----------------------------- 
*Signed pursuant to a power of attorney, dated October 4, 2006, included 
as Exhibit A to this Schedule 13G filed with the Securities and Exchange 
Commission by BlackRock, Inc. 
 



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EXHIBIT A

POWER OF ATTORNEY

The undersigned, BLACKROCK, INC., a corporation
duly organized under the laws of the State of Delaware, on its behalf
and that of its subsidiaries (collectively, the "Company"), does
hereby make, constitute and appoint each of  James DesMarais, 
Bartholomew Battista, Dan Waltcher, Vincent Tritto, Karen Clark, 
Denis Molleur, Alice Pellegrino and Jeffrey Hiller acting
severally, as its true and lawful attorneys-in-fact, for the purpose of,
from time to time, executing in its name and on its behalf, whether
the Company is acting individually or as representative of others, any
and all documents, certificates, instruments, statements, other filings
and amendments to the foregoing (collectively, "documents") determined
by such person to be necessary or appropriate to comply with ownership
or control-person reporting requirements imposed by any United States
or non-United States governmental or regulatory authority,
including without limitation Forms 3, 4,5,13D,13F and 13G and 
any amendments to any of the foregoing as may be required to be filed
with the Securities and Exchange Commission, and delivering,
furnishing or filing any such documents with the appropriate 
governmental, regulatory authority or other person, and giving and
granting to each such attorney-in-fact power and authority to act in 
the premises as fully and to all intents and purposes as the Company
might or could do if personally present by one of its authorized 
signatories, hereby ratifying and confirming all that said attorney-in-fact
shall lawfully do or cause to be done by virtue hereof.
Any such determination by an attorney-in-fact named herein shall be 
conclusively evidenced by such person's execution, delivery, furnishing
or filing of the applicable document.

	This power of attorney shall be valid from the date hereof
and remain in full force and effect until either revoked in writing by the
company, or, in respect if any attorney-in-fact named herein, until such 
person ceases to be an employee of the Company or one of its
affiliates.

	IN WITNESS WHEREOF, the undersigned has caused this power
of attorney to be executed as of this 4th day of October, 2006.

BLACKROCK, Inc.


By:_/s/ Ralph Schlosstein__________________________________
Name: Ralph Schlosstein
Title: President