SIXTH PROSPECTUS SUPPLEMENT (to Prospectus dated September 4, 1997 First Prospectus Supplement, dated November 3, 1997, Second Prospectus Supplement, dated November 17, 1997, Third Prospectus Supplement, dated December 31, 1997, Fourth Prospectus Supplement, dated March 3, 1998 and Fifth Prospectus Supplement, dated April 16, 1998) Filed Pursuant to Rules 424(b)(3) and (c) Registration Nos. 333-16307 and 333-16307-01 4,025,000 Trust Convertible Preferred Securities VANSTAR FINANCING TRUST 6-3/4% Trust Convertible Preferred Securities (Liquidation Amount $50 per Preferred Security) guaranteed by, and convertible into Common Stock of, VANSTAR CORPORATION ------------------- This Sixth Prospectus Supplement supplements and amends the Prospectus dated September 4, 1997, as supplemented and amended by that First Prospectus Supplement dated November 3, 1997, that Second Prospectus Supplement dated November 17, 1997, that Third Prospectus Supplement dated December 31, 1997, that Fourth Prospectus Supplement dated March 3, 1998 and that Fifth Prospectus Supplement dated April 16, 1998 (collectively, the "Prospectus"), relating to the 6-3/4% Trust Convertible Preferred Securities (the "Preferred Securities") which represent preferred undivided beneficial ownership interests in the assets of Vanstar Financing Trust, a statutory business trust formed under the laws of the State of Delaware, and the shares of common stock, par value $.001 per share (the "Company Common Stock"), of Vanstar Corporation, a Delaware corporation, issuable upon conversion of the Preferred Securities. All capitalized terms used but not otherwise defined in this Prospectus Supplement shall have the meanings ascribed thereto in the Prospectus. Following their original issuance by the Trust, the Preferred Securities have been resold by the Initial Purchasers and subsequent purchasers thereof to qualified institutional buyers in transactions exempt from registration under Rule 144A promulgated under the Securities Act. The Preferred Securities have been and will remain eligible for resale on the PORTAL Market. However, Preferred Securities resold pursuant to this Prospectus will no longer be eligible for trading on the PORTAL Market. The Company and the Trust do not currently intend to list the Preferred Securities resold pursuant to this Prospectus on any securities exchange or to seek approval for quotation through any automated quotation system. Accordingly, there can be no assurance as to the development or liquidity of any market for the Preferred Securities resold under this Prospectus. See "Risk Factors - Absence of Public Market for the Preferred Securities on Resale" in the Prospectus. Neither the Company nor the Trust will receive any of the proceeds from the sale of the Preferred Securities by the Selling Holders. Expenses of preparing and filing the Registration Statement, the Prospectus, this Sixth Prospectus Supplement and all other prospectus supplements are borne by the Company. The Prospectus, together with this Sixth Prospectus Supplement, constitutes the prospectus required to be delivered by Section 5(b) of the Securities Act with respect to offers and sales of the Preferred Securities and the Company Common Stock issuable upon conversion of the Preferred Securities. All references in the Prospectus to "this Prospectus" are hereby amended to read "this Prospectus (as supplemented and amended)". THE SECURITIES OFFERED HEREBY INVOLVE A HIGH DEGREE OF RISK. SEE "RISK FACTORS" BEGINNING ON PAGE 11 OF THE PROSPECTUS. THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. The date of this Prospectus Supplement is May 22, 1998. The Prospectus is hereby amended to modify the "Selling Holders" table located therein to add the following information to the end thereof: The table below sets forth information as of May 22, 1998 concerning beneficial ownership of the Preferred Securities of the Selling Holders therein listed. All information concerning beneficial ownership has been furnished by the Selling Holders. Preferred Securities Owned Before Offering ------------------------- No. of Preferred Securities Name of Selling Holder(1) Number Percent(2) Offered in the Offering --------------------------- --------- ----------- ---------------------------- 100. Capital World Growth and Income Fund, Inc......... 308,000(3) 7.7% 308,000 101. Smallcap World Fund, Inc... 132,000(3) 3.3 132,000 - -------------------------- * Represents less than one percent. (1) Information concerning Selling Holders numbered 1 through 92 is included in the Prospectus dated September 4, 1997. Information concerning Selling Holder numbered 93 is included in the First Prospectus Supplement dated November 3, 1997. Information concerning Seller Holder numbered 94 is included in the Second Prospectus Supplement dated November 17, 1997. Information concerning Selling Holders numbered 95 through 97 is included in the Third Prospectus Supplement dated December 31, 1997. Information concerning Selling Holder numbered 98 is included in the Fourth Prospectus Supplement dated March 3, 1998. Information concerning Selling Holder numbered 99 is included in the Fifth Prospectus Supplement dated April 16, 1998. (2) Percentage indicated is based upon 4,025,000 Preferred Securities outstanding on May 21, 1998. (3) Excludes Preferred Securities owned by the Selling Holder which have previously been resold pursuant to this Prospectus. Additionally, Smallcap World Fund, Inc., has advised that it owns 2,300,000 shares of Company Common Stock. Except as set forth above or in the Prospectus, the Selling Holders do not have, nor within the past three years have had, any position, office or other material relationship with the Trust or the Company or any of their predecessors or affiliates. Each of the Selling Holders identified above may have sold, transferred or otherwise disposed of all or a portion of its Preferred Securities since the date on which it provided the information regarding its respective Preferred Securities in transactions exempt from the registration requirements of the Securities Act. The above listed Selling Holders have not converted any of the Preferred Securities into shares of Company Common Stock. See "Description of Preferred Securities - Conversion Rights" in the Prospectus. Additional Selling Holders or other information concerning the above listed Selling Holders may be set forth from time to time in additional prospectus supplements.