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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. ___________)*
USEC Inc.
(Name of Issuer)
COMMON
(Title of Class of Securities)
9033E108
(CUSIP Number)
December 31, 2001
(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).
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).
CUSIP No. 9033E108
1. Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).
Donald Smith & Co., Inc.
13-2807845
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a)
(b) [X]
3. SEC Use Only .............................
4. Citizenship or Place of Organization
A Delaware Corporation
Number of 5. Sole Voting Power 3,405,200 shares
Shares
Beneficially 6. Shared Voting Power 0
Owned by
Each Reporting 7. Sole Dispositive Power 3,405,200 shares
Person With
8. Shared Dispositive Power 0
9. Aggregate Amount Beneficially Owned by Each Reporting Person
3,405,200 shares
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
11. Percent of Class Represented by Amount in Row (9): Less than 5%
12. Type of Reporting Person (See Instructions) IA
Item 1.
(a) Name of Issuer: USEC Inc.
(b) Address of Issuer's Principal Executive Offices
2 Democracy Center
6903 Rockledge Drive
Bethesda, MD 20817
Item 2.
(a) Name of Person Filing: Donald Smith & Co., Inc.
(b) Address of Principal Business Office:
East 80 Route 4 p Suite 360
Paramus, NJ 07652
(c) Citizenship: A Delaware Corporation
(d) Title of Class of Securities: Common
(e) CUSIP Number: 9033E108
Item 3. This statement is filed pursuant to Section 240.13d-1(b), and the
person filing is an investment advisor registered in accordance
with Section 240.13d-1(b)(1)(ii)(E);
Item 4. Ownership.
Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.
(a) Amount beneficially owned: SEE ITEM 9 OF COVER PAGE
(b) Percent of class: LESS THAN 5%
(c) Number of shares as to which the person has:
(i) SOLE POWER TO VOTE: SEE ITEM 5 OF COVER PAGE
(ii) SHARED POWER TO VOTE: SEE ITEM 6 OF COVER PAGE
(iii) SOLE POWER TO DISPOSE: SEE ITEM 7 OF COVER PAGE
(iv) SHARED POWER TO DISPOSE: SEE ITEM 8 OF COVER PAGE
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 [XX].
Item 6. Ownership of More than Five Percent on Behalf of Another Person:
NOT APPLICABLE.
Item 7. Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on By the Parent Holding Company
NOT APPLICABLE
Item 8. Identification and Classification of Members of the Group
NOT APPLICABLE
Item 9. Notice of Dissolution of Group
NOT APPLICABLE
Item 10. Certification
(a)
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.
January 18, 2002__________
Date
Donald G. Smith___________
Signature
President_________________
Title