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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549
 FORM 10-K/A (Mark One) þ
    
    ANNUAL REPORT PURSUANT TO
SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
 For the fiscal year ended March 31, 2004 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
Commission File Number: 000-22125 DiamondCluster International, Inc. (Exact name of registrant as specified in its charter)
 Delaware
(State or other jurisdiction of
incorporation or organization)
875 N. Michigan Avenue, Suite 3000
Chicago, Illinois
(Address of Principal Executive Offices)
    
    36-4069408
(I.R.S. Employer
Identification No.)
60611
(Zip Code)
 Registrants telephone number, including area code: (312) 255-5000
Securities registered pursuant to Section 12(b) of the Act: None
Securities registered pursuant to Section 12(g) of the Act: Common Stock, par value $.001 per share Indicate by check mark whether the Registrant (i) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes þ   No o Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to
the best of Registrants knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. Yes o   No þ Indicate by check mark whether the Registrant is an accelerated filer.
Yes þ     No o As of September 30, 2003 there were 33,716,210 shares of Common Stock of
Registrant outstanding. The aggregate market value of the Common Stock of the
Registrant held by non-affiliates as of September 30, 2003 was an estimated
$202.1 million, computed based upon the closing price of $6.84 per share on
September 30, 2003. As
of May 31, 2004, there were 34,629,363 shares of Common Stock of the
Registrant outstanding. DOCUMENTS INCORPORATED BY REFERENCE None




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Explanatory Note The undersigned Registrant (the Company) hereby amends its Annual Report on
Form 10-K for the fiscal year ended March 31, 2004 (fiscal 2004) as follows: 1.
    
    Revising on the cover page the
number of shares of Common Stock of the
Registrant outstanding as of May 31, 2004 from 39,188,037 shares,
as originally filed, to 34,629,363 shares of Common Stock, as amended
hereby. The revised number reflects the amount of shares outstanding
on such date exclusive of treasury shares.2.
    
    Deleting in its entirety Exhibit 23 and substituting in lieu thereof
the Independent Auditors Consent set forth below to reflect the
correction by the auditor of the date thereof from April 25, 2004 to
June 10, 2004.




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SIGNATURES Pursuant to the requirements of Section 13 or15(d)of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned, thereunto duly authorized. DIAMONDCLUSTER INTERNATIONAL, INC.By:
    /S/    MELVYN E. BERGSTEINMelvyn E. BergsteinChairman and Chief Executive Officer Signature
    
    Title
    
    Date/S/    MELVYN E. BERGSTEINMelvyn E. Bergstein
    
    Chairman and Chief Executive Officer
(Principal Executive Officer)
    
    June 14, 2004/S/    KARL E. BUPPKarl E. Bupp
    
    Chief Financial Officer and Treasurer (Principal
Financial and Accounting Officer)
    
    June 14, 2004/S/    ADAM J. GUTSTEINAdam J. Gutstein
    
    President, Managing Director  Europe and
Latin America, and Director
    
    June 14, 2004John J. Sviokla*
    
    Vice Chairman and Director
    
    June 14, 2004Edward R. Anderson*
    
    Director
    
    June 14, 2004Donald R. Caldwell*
    
    Director
    
    June 14, 2004Mark L. Gordon*
    
    Director
    
    June 14, 2004Alan C. Kay*
    
    Director
    
    June 14, 2004Michael E. Mikolajczyk*
    
    Director
    
    June 14, 2004Javier Rubio*
    
    Director
    
    June 14, 2004Pauline A. Schneider*
    
    Director
    
    June 14, 2004Samuel K. Skinner*
    
    Director
    
    June 14, 2004
 *Signed pursuant to the power of attorney granted to Melvyn Bergstein and
William McClayton on June 7, 2004, as set forth on the signature page to the
Companys Registration Statement on Form 10-K for its fiscal year ending March
31, 2004, filed June 10, 2004.