content: <PAGE>
   
                        SECURITIES AND EXCHANGE COMMISSION
  
                              WASHINGTON, D.C.  20549
  
  
  
                                     FORM 8-K
  
                                  CURRENT REPORT
  
  
  
                        Pursuant to Section 13 or 15(d) of
                        the Securities Exchange Act of 1934
  
  
  
   
  Date of Report (Date of earliest event reported)  April 30, 1999
  
  
   
                                INKTOMI CORPORATION
   
              (Exact name of registrant as specified in its charter)
   
  <TABLE> 
          DELAWARE                       000-24339                       94-3238130
  <S>                           <C>                            <C> 
  (State of incorporation)      (Commission File Number)       (IRS Employer Identification No.)
  </TABLE> 
  
   
          1900 S. NORFOLK STREET, SUITE 310, SAN MATEO, CALIFORNIA 94403
   
              (Address of principal executive offices of Registrant)
  
  
   
                                  (650) 653-2800
  
               (Registrant's telephone number, including area code)
  <PAGE>
   
  Item 2.   Acquisition or Disposition of Assets
            ------------------------------------
  
            On April 30, 1999, Inktomi Corporation, a Delaware corporation
  ("Inktomi") completed its acquisition of Impulse Buy Network, Inc., a California
  corporation ("Impulse"), a privately held developer of merchandising tools that
  help online merchants acquire customers from third party web sites. In the
  acquisition, a wholly-owned subsidiary of Inktomi merged with and into Impulse;
  Impulse became a wholly-owned subsidiary of Inktomi; and the former shareholders
  of Impulse received shares of Inktomi Common Stock in exchange for their shares
  of Impulse at the rates of 0.104055 shares of Inktomi Common Stock for each
  share of Impulse Common Stock, 0.111333 shares of Inktomi Common Stock for each
  share of Impulse Series A Preferred Stock and 0.115009 shares of Inktomi Common
  Stock for each share of Impulse Series B Preferred Stock (the "Merger").
  
            An aggregate of 900,000 (or a smaller number determined after
  accounting for the payment of cash in lieu of fractional shares) shares of
  Inktomi Common Stock were issuable pursuant to the Merger. These shares were
  issued in reliance on exemptions from registration under the Securities Act of
  1933, as amended (the "Securities Act"). As a result, all shares of Inktomi
  Common Stock issued in connection with the Merger are subject to restrictions on
  transfer under the applicable provisions of the Securities Act and carry a
  legend reflecting such restrictions. Under the terms of the Merger, Inktomi has
  granted the former shareholders of Impulse rights to register under the
  Securities Act the shares of Inktomi Common Stock received in connection with
  the Merger.
  
                                        -2-
  <PAGE>
   
  Item 7.   Financial Statements, Pro Forma Financial Information and Exhibits
            ------------------------------------------------------------------
  
       (a)  Financial Statements of Business Acquired.
  
            Filing of financial statements is not required under Rule 3-05(b) of
            Regulation S-X of the Securities Act of 1933.
  
       (b)  Pro Forma Financial Information.
  
            Filing of pro forma financial information is not required pursuant to
            Article 11 of Regulation S-X of the Securities Act of 1933.
  
       (c)  Exhibits.
  
            Exhibit No.             Description
            -----------             ----------- 
   
            2.1                     Agreement and Plan of Reorganization, dated
                                    April 21, 1999, by and among Inktomi
                                    Corporation, IC Acquisition Corp. and Impulse
                                    Buy Network, Inc.
   
            99.1                    Press release of Inktomi Corporation, dated
                                    April 22, 1999.
  
                                        -3-
  <PAGE>
   
                                    SIGNATURES
  
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, as
  amended, the registrant has duly caused this report to be signed on its behalf
  by the undersigned hereunto duly authorized.
  
  
                                          INKTOMI CORPORATION
  
  
  Dated: May 5, 1999                      By: /s/ Jerry M. Kennelly
                                              ------------------------------------
                                              Jerry M. Kennelly, Vice President of
                                              Finance and Chief Financial Officer
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metadata_filer: {"company-data": {"conformed-name": "INKTOMI CORP", "cik": "0001024302", "assigned-sic": "7373", "irs-number": "943238130", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-24339", "film-number": "99619277"}, "business-address": {"street1": "1900 S NORFOLK ST", "street2": "SUITE 310", "city": "SAN MATEO", "state": "CA", "zip": "94403", "phone": "6506532800"}, "mail-address": {"street1": "1900 S NORFOLK ST", "street2": "SUITE 310", "city": "SAN MATEO", "state": "CA", "zip": "94403"}}
text: SECURITIES AND EXCHANGE COMMISSION
  
                              WASHINGTON, D.C.  20549
  
                                     FORM 8-K
  
                                  CURRENT REPORT
  
                        Pursuant to Section 13 or 15(d) of
                        the Securities Exchange Act of 1934
  
   
  Date of Report (Date of earliest event reported)  April 30, 1999
  
   
                                INKTOMI CORPORATION
   
              (Exact name of registrant as specified in its charter)
   
   
          DELAWARE                       000-24339                       94-3238130
  (State of incorporation)      (Commission File Number)       (IRS Employer Identification No.)
  1900 S. NORFOLK STREET, SUITE 310, SAN MATEO, CALIFORNIA 94403
   
              (Address of principal executive offices of Registrant)
  
   
                                  (650) 653-2800
  
               (Registrant's telephone number, including area code)
  Item 2.   Acquisition or Disposition of Assets
            ------------------------------------
  
            On April 30, 1999, Inktomi Corporation, a Delaware corporation
  ("Inktomi") completed its acquisition of Impulse Buy Network, Inc., a California
  corporation ("Impulse"), a privately held developer of merchandising tools that
  help online merchants acquire customers from third party web sites. In the
  acquisition, a wholly-owned subsidiary of Inktomi merged with and into Impulse;
  Impulse became a wholly-owned subsidiary of Inktomi; and the former shareholders
  of Impulse received shares of Inktomi Common Stock in exchange for their shares
  of Impulse at the rates of 0.104055 shares of Inktomi Common Stock for each
  share of Impulse Common Stock, 0.111333 shares of Inktomi Common Stock for each
  share of Impulse Series A Preferred Stock and 0.115009 shares of Inktomi Common
  Stock for each share of Impulse Series B Preferred Stock (the "Merger").
  
            An aggregate of 900,000 (or a smaller number determined after
  accounting for the payment of cash in lieu of fractional shares) shares of
  Inktomi Common Stock were issuable pursuant to the Merger. These shares were
  issued in reliance on exemptions from registration under the Securities Act of
  1933, as amended (the "Securities Act"). As a result, all shares of Inktomi
  Common Stock issued in connection with the Merger are subject to restrictions on
  transfer under the applicable provisions of the Securities Act and carry a
  legend reflecting such restrictions. Under the terms of the Merger, Inktomi has
  granted the former shareholders of Impulse rights to register under the
  Securities Act the shares of Inktomi Common Stock received in connection with
  the Merger.
  
                                        -2-
  Item 7.   Financial Statements, Pro Forma Financial Information and Exhibits
            ------------------------------------------------------------------
  
       (a)  Financial Statements of Business Acquired.
  
            Filing of financial statements is not required under Rule 3-05(b) of
            Regulation S-X of the Securities Act of 1933.
  
       (b)  Pro Forma Financial Information.
  
            Filing of pro forma financial information is not required pursuant to
            Article 11 of Regulation S-X of the Securities Act of 1933.
  
       (c)  Exhibits.
  
            Exhibit No.             Description
            -----------             ----------- 
   
            2.1                     Agreement and Plan of Reorganization, dated
                                    April 21, 1999, by and among Inktomi
                                    Corporation, IC Acquisition Corp. and Impulse
                                    Buy Network, Inc.
   
            99.1                    Press release of Inktomi Corporation, dated
                                    April 22, 1999.
  
                                        -3-
  SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, as
  amended, the registrant has duly caused this report to be signed on its behalf
  by the undersigned hereunto duly authorized.
  
                                          INKTOMI CORPORATION
  
  Dated: May 5, 1999                      By: /s/ Jerry M. Kennelly
                                              ------------------------------------
                                              Jerry M. Kennelly, Vice President of
                                              Finance and Chief Financial Officer