SCHEDULE 13G
Amendment No. 4
SI International Incorporated
Common Stock
Cusip #78427V102
Cusip #78427V102
Item 1: Reporting Person - FMR Corp.
Item 4: Delaware
Item 5: 91,129
Item 6: 0
Item 7: 1,693,636
Item 8: 0
Item 9: 1,693,636
Item 11: 15.000%
Item 12: HC
Cusip #78427V102
Item 1: Reporting Person - Edward C. Johnson 3d
Item 4: United States of America
Item 5: 0
Item 6: 0
Item 7: 1,693,636
Item 8: 0
Item 9: 1,693,636
Item 11: 15.000%
Item 12: IN
SCHEDULE 13G - TO BE INCLUDED IN
STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)
Item 1(a). Name of Issuer:
SI International Incorporated
Item 1(b). Name of Issuer's Principal Executive Offices:
12012 Sunset Road
Suite 800
Reston, VA 20190-5869
Item 2(a). Name of Person Filing:
FMR Corp.
Item 2(b). Address or Principal Business Office or, if None,
Residence:
82 Devonshire Street, Boston,
Massachusetts 02109
Item 2(c). Citizenship:
Not applicable
Item 2(d). Title of Class of Securities:
Common Stock
Item 2(e). CUSIP Number:
78427V102
Item 3. This statement is filed pursuant to Rule 13d-1(b) or 13d-2(b)
and the person filing, FMR Corp., is a parent holding company
in accordance with Section 240.13d-1(b)(ii)(G). (Note: See
Item 7).
Item 4. Ownership
(a) Amount Beneficially Owned: 1,693,636
(b) Percent of Class: 15.000%
(c) Number of shares as to which such
person has:
(i) sole power to vote or to direct
the vote: 91,129
(ii) shared power to vote or to
direct the vote: 0
(iii) sole power to dispose or to
direct the disposition of: 1,693,636
(iv) shared power to dispose or to
direct the disposition of: 0
Item 5. Ownership of Five Percent or Less of a Class.
Not applicable.
Item 6. Ownership of More than Five Percent on Behalf of Another
Person.
Various persons have the right to receive or the power to
direct the receipt of dividends from, or the proceeds from the
sale of, the Common Stock of SI International Incorporated.
The interest of one person, Fidelity Advisors Small Cap Fund,
an investment company registered under the Investment
Company Act of 1940, in the Common Stock of SI
International Incorporated, amounted to 640,470 shares or
5.672% of the total outstanding Common Stock at December
31, 2005. The interest of one person, Fidelity Small Cap Stock
Fund, an investment company registered under the Investment
Company Act of 1940, in the Common Stock of SI
International Incorporated, amounted to 668,137 shares or
5.917% of the total outstanding Common Stock at December
31, 2005.
Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on By the Parent
Holding Company.
See attached Exhibit A.
Item 8. Identification and Classification of Members of
the Group.
Not applicable. See attached Exhibit A.
Item 9. Notice of Dissolution of Group.
Not applicable.
Item 10. Certification.
By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were acquired in the
ordinary course of business and were not acquired for the
purpose of and do not have the effect of changing or
influencing the control of the issuer of such securities and
were not acquired 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, I certify that the information set forth in this statement
is true, complete and correct.
February 14, 2006
Date
/s/Eric D. Roiter
Signature
Eric D, Roiter
Duly authorized under Power of Attorney
dated December 30, 1997 by and on behalf of FMR Corp. and
its direct and indirect subsidiaries
SCHEDULE 13G - TO BE INCLUDED IN
STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)
Pursuant to the instructions in Item 7 of Schedule 13G,
Fidelity Management & Research Company ("Fidelity"), 82
Devonshire Street, Boston, Massachusetts 02109, a wholly-
owned subsidiary of FMR Corp. and an investment adviser
registered under Section 203 of the Investment Advisers Act
of 1940, is the beneficial owner of 1,693,636 shares or
15.000% of the Common Stock outstanding of SI International
Incorporated ("the Company") as a result of acting as
investment adviser to various investment companies registered
under Section 8 of the Investment Company Act of 1940.
The ownership of one investment company, Fidelity
Advisors Small Cap Fund, amounted to 640,470 shares or
5.672% of the Common Stock outstanding. Fidelity Advisors
Small Cap Fund has its principal business office at 82
Devonshire Street, Boston, Massachusetts 02109.
The ownership of one investment company, Fidelity
Small Cap Stock Fund, amounted to 668,137 shares or 5.917%
of the Common Stock outstanding. Fidelity Small Cap Stock
Fund has its principal business office at 82 Devonshire Street,
Boston, Massachusetts 02109.
Edward C. Johnson 3d and FMR Corp., through its
control of Fidelity, and the funds each has sole power to
dispose of the 1,693,636 shares owned by the Funds.
Members of the family of Edward C. Johnson 3d,
Chairman of FMR Corp., are the predominant owners, directly
or through trusts, of Series B shares of common stock of FMR
Corp., representing 49% of the voting power of FMR Corp.
The Johnson family group and all other Series B shareholders
have entered into a shareholders' voting agreement under
which all Series B shares will be voted in accordance with the
majority vote of Series B shares. Accordingly, through their
ownership of voting common stock and the execution of the
shareholders' voting agreement, members of the Johnson
family may be deemed, under the Investment Company Act of
1940, to form a controlling group with respect to FMR Corp.
Neither FMR Corp. nor Edward C. Johnson 3d,
Chairman of FMR Corp., has the sole power to vote or direct
the voting of the shares owned directly by the Fidelity Funds,
which power resides with the Funds' Boards of Trustees.
Fidelity carries out the voting of the shares under written
guidelines established by the Funds' Boards of Trustees.
SCHEDULE 13G - TO BE INCLUDED IN
STATEMENTS
FILED PURSUANT TO RULE 13d-1(b) or 13d-2(b)
RULE 13d-1(f)(1) AGREEMENT
The undersigned persons, on February 14, 2006, agree
and consent to the joint filing on their behalf of this Schedule
13G in connection with their beneficial ownership of the
Common Stock of SI International Incorporated at December
31, 2005.
FMR Corp.
By /s/ Eric D. Roiter
Eric D. Roiter
Duly authorized under Power of Attorney dated
December 30, 1997, by and on behalf of FMR Corp. and its
direct and indirect subsidiaries
Edward C. Johnson 3d
By /s/ Eric D. Roiter
Eric D. Roiter
Duly authorized under Power of Attorney dated
December 30, 1997, by and on behalf of Edward C. Johnson
3d
Fidelity Management & Research Company
By /s/ Eric D. Roiter
Eric D. Roiter
Senior V.P. and General Counsel
Fidelity Advisors Small Cap Fund
By /s/ Eric D. Roiter
Eric D. Roiter
Secretary
Fidelity Small Cap Stock Fund
By /s/ Eric D. Roiter
Eric D. Roiter
Secretary