United States Securities and Exchange Commission Washington, D.C. 20549 Form 10-K Pioneer-Standard Electronics, Inc. (Exact name of registrant as specified in its charter) Registrant’s telephone number, including area code: (440) 720-8500 Securities Registered Pursuant to Section 12(b) of the Act: None Securities Registered Pursuant to Section 12(g) of the Act: Common Shares, without par value Common Share Purchase Rights FOR ANNUAL REPORT PURSUANT TO SECTIONS 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 ≤ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31, 2003 OR n TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from   to COMMISSION FILE NO. 0-5734 Indicate by check mark whether the Registrant (1) 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 ≤ No n 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 Annual Report or any amendment to this Form 10-K. Yes ≤ Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act). Yes ≤ No n The aggregate market value of Common Shares held by non-affiliates as of September 30, 2002 (the last business day of the registrant’s most recently completed second fiscal quarter) was $190,466,836 computed on the basis of the last reported sale price per share ($7.24) of such shares on the NASDAQ National Market. As of May 1, 2003, the Registrant had the following number of Common Shares outstanding: 32,105,614 Portions of the Registrant’s definitive Proxy Statement to be used in connection with its Annual Meeting of Shareholders to be held on July 29, 2003 are incorporated by reference into Part III of this Form 10-K. Except as otherwise stated, the information contained in this Annual Report on Form 10-K is as of March 31, 2003. DOCUMENTS INCORPORATED BY REFERENCE 34-0907152 (I.R.S. employer identification No.) 44124 (Zip code) 6065 Parkland Boulevard Mayfield Heights, Ohio (Address of principal executive offices) OHIO (State or other jurisdiction of incorporation or organization)