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 22, 2002
                                                   -------------------------------
  
                                 TIBCO Software Inc.
  --------------------------------------------------------------------------------
               (Exact name of registrant as specified in its charter)
  
  
           Delaware                      000-26579                 77-0449727
  ----------------------------       -----------------        --------------------
  (State or other jurisdiction          (Commission              (IRS Employer
        of incorporation)               File Number)           Identification No.)
  
  
  
                                3303 Hillview Avenue
                          Palo Alto, California 94304-1213
                      ----------------------------------------
                      (Address of principal executive offices)
                                     (Zip Code)
  
  Registrant's telephone number, including area code:         (650) 846-1000
                                                       --------------------------
  
  
                                  3165 Porter Drive
                             Palo Alto, California 94304
  --------------------------------------------------------------------------------
            (Former name or former address, if changed since last report)
  
  <PAGE>
  
  Item 5.  Other Events
           ------------
  
       On April 22, 2002, Talarian Corporation ("Talarian") and TIBCO Software
                                                  --------
  Inc. ("TIBCO") jointly issued a press release announcing that Talarian had
         -----
  entered into a memorandum of understanding with counsel to the plaintiffs to a
  lawsuit, Robert Mathiason v. Talarian Corporation, originally filed on January
  8, 2002 in the Superior Court of the State of California for the County of Santa
  Clara. A copy of the press release is filed as an exhibit to this report. In
  connection with the entry into the memorandum of understanding, Talarian is
  making the disclosures set forth in an exhibit to this report with respect to
  its pending acquisition by TIBCO.
  
       Effective as of April 20, 2002, TIBCO's headquarters will be relocated to
  3303 Hillview Avenue, Palo Alto, CA 94304-1213.
  
  Item 7.  Financial Statements and Exhibits
           ---------------------------------
  
           (c)   Exhibits
                 --------
                 99.1     Press Release dated April 22, 2002.
  
                 99.2     Talarian Disclosure
  
  
                                        -2-
  
  <PAGE>
  
                                      SIGNATURE
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  Dated:  April 22, 2002
  
                                 TIBCO SOFTWARE INC.
  
  
  
                                 By: /s/ Robert P. Stefanski
                                     ---------------------------------------------
                                     Robert P. Stefanski
                                     Executive Vice President, General Counsel
                                     and Secretary
  
                                        -3-
  
  
  <PAGE>
                                  INDEX TO EXHIBIT
  
     Exhibit
      Number                           Description of Exhibit
  ---------------     ------------------------------------------------------------
  
       99.1           Press Release dated April 22, 2002.
  
       99.2           Talarian Disclosure
metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "d8k.txt", "description": "FORM 8-K", "secsgml_size_bytes": 3845}]
metadata_filer: {"company-data": {"conformed-name": "TIBCO SOFTWARE INC", "cik": "0001085280", "assigned-sic": "7372", "irs-number": "770449727", "state-of-incorporation": "DE", "fiscal-year-end": "1130"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-26579", "film-number": "02617637"}, "business-address": {"street1": "3165 PORTER DRIVE", "city": "PALO ALTO", "state": "CA", "zip": "94304", "phone": "6508465000"}, "mail-address": {"street1": "3165 PORTER DRIVE", "city": "PALO ALTO", "state": "CA", "zip": "94304"}}
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 22, 2002
                                                   -------------------------------
  
                                 TIBCO Software Inc.
  --------------------------------------------------------------------------------
               (Exact name of registrant as specified in its charter)
  
           Delaware                      000-26579                 77-0449727
  ----------------------------       -----------------        --------------------
  (State or other jurisdiction          (Commission              (IRS Employer
        of incorporation)               File Number)           Identification No.)
  
                                3303 Hillview Avenue
                          Palo Alto, California 94304-1213
                      ----------------------------------------
                      (Address of principal executive offices)
                                     (Zip Code)
  
  Registrant's telephone number, including area code:         (650) 846-1000
                                                       --------------------------
  
                                  3165 Porter Drive
                             Palo Alto, California 94304
  --------------------------------------------------------------------------------
            (Former name or former address, if changed since last report)
  Item 5.  Other Events
           ------------
  
       On April 22, 2002, Talarian Corporation ("Talarian") and TIBCO Software
                                                  --------
  Inc. ("TIBCO") jointly issued a press release announcing that Talarian had
         -----
  entered into a memorandum of understanding with counsel to the plaintiffs to a
  lawsuit, Robert Mathiason v. Talarian Corporation, originally filed on January
  8, 2002 in the Superior Court of the State of California for the County of Santa
  Clara. A copy of the press release is filed as an exhibit to this report. In
  connection with the entry into the memorandum of understanding, Talarian is
  making the disclosures set forth in an exhibit to this report with respect to
  its pending acquisition by TIBCO.
  
       Effective as of April 20, 2002, TIBCO's headquarters will be relocated to
  3303 Hillview Avenue, Palo Alto, CA 94304-1213.
  
  Item 7.  Financial Statements and Exhibits
           ---------------------------------
  
           (c)   Exhibits
                 --------
                 99.1     Press Release dated April 22, 2002.
  
                 99.2     Talarian Disclosure
  
                                        -2-
  SIGNATURE
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  Dated:  April 22, 2002
  
                                 TIBCO SOFTWARE INC.
  
                                 By: /s/ Robert P. Stefanski
                                     ---------------------------------------------
                                     Robert P. Stefanski
                                     Executive Vice President, General Counsel
                                     and Secretary
  
                                        -3-
  INDEX TO EXHIBIT
  
     Exhibit
      Number                           Description of Exhibit
  ---------------     ------------------------------------------------------------
  
       99.1           Press Release dated April 22, 2002.
  
       99.2           Talarian Disclosure