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
  
  
  
                                 February 26, 1998
                   ---------------------------------------------
                  Date of Report (Date of earliest event reported)
  
  
                               SIEBEL SYSTEMS, INC.
                   ---------------------------------------------
               (Exact name of registrant as specified in its charter)
  
  
  
  
           Delaware                        0-20725            94-3187233
  -------------------------------       ------------      -------------------
  (State or other jurisdiction of       (Commission       (I.R.S. Employer
         incorporation)                 File Number)      Identification No.)
   
  
  
  
                              1855 South Grant Street
                                San Mateo, CA 94402
                   ---------------------------------------------
                      (Address of principal executive offices)
  
  
                                  (650) 295-5000
                   ---------------------------------------------
                (Registrant's telephone number, including area code)
  
   
  <PAGE>
   
  ITEM 5.  OTHER EVENTS
  
  
  A.   SIEBEL SYSTEMS, INC. ANNOUNCES TWO-FOR-ONE STOCK SPLIT
  
       On February 26, 1998 Siebel Systems, Inc. ("Siebel" or the "Company"),
  announced that its Board of Directors approved a two-for-one stock split. The
  stock split will be effected as a 100% stock dividend. Stockholders of record
  on March 9th, 1998 will be issued a certificate representing one additional
  share of common stock for each share of common stock held on the record date.
  The payment date for this stock dividend will be March 20th, 1998.
  
       As a result of the payment of the stock dividend, the number of shares of
  Siebel Common Stock registered to be sold pursuant to each of the Company's
  registration statements on Form S-3 (Nos. 333-36967 and 333-40259) shall, on and
  after the payment date for the stock dividend, be twice the number of shares
  indicated in such registration statements.
  
  B.   SIEBEL SYSTEMS ANNOUNCES MERGER WITH SCOPUS TECHNOLOGY
  
       On March 2, 1998, the Company announced an agreement to merge with Scopus
  Technology, Inc. in a transaction to be accounted for as a "pooling of 
  interests" and intended to qualify as a tax-free reorganization. A press 
  release relating to the proposed transaction is attached hereto as Exhibit 
  99.1.
  
  ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS
  
       (c)  Exhibits
  
       EX.-99.1    Press Release dated March 2, 1998.
  <PAGE>
  
                                     SIGNATURES
  
       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.
  
  
                                 SIEBEL SYSTEMS, INC.
  
  
  
  Dated:    March 3, 1998        By: /s/ Howard H. Graham
                                    --------------------------------------------
                                     Howard H. Graham
                                     Senior Vice President, Finance and
                                     Administration and Chief Financial Officer
  
                                         5.
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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
  
                                 February 26, 1998
                   ---------------------------------------------
                  Date of Report (Date of earliest event reported)
  
                               SIEBEL SYSTEMS, INC.
                   ---------------------------------------------
               (Exact name of registrant as specified in its charter)
  
           Delaware                        0-20725            94-3187233
  -------------------------------       ------------      -------------------
  (State or other jurisdiction of       (Commission       (I.R.S. Employer
         incorporation)                 File Number)      Identification No.)
   
  
                              1855 South Grant Street
                                San Mateo, CA 94402
                   ---------------------------------------------
                      (Address of principal executive offices)
  
                                  (650) 295-5000
                   ---------------------------------------------
                (Registrant's telephone number, including area code)
  ITEM 5.  OTHER EVENTS
  
  A.   SIEBEL SYSTEMS, INC. ANNOUNCES TWO-FOR-ONE STOCK SPLIT
  
       On February 26, 1998 Siebel Systems, Inc. ("Siebel" or the "Company"),
  announced that its Board of Directors approved a two-for-one stock split. The
  stock split will be effected as a 100% stock dividend. Stockholders of record
  on March 9th, 1998 will be issued a certificate representing one additional
  share of common stock for each share of common stock held on the record date.
  The payment date for this stock dividend will be March 20th, 1998.
  
       As a result of the payment of the stock dividend, the number of shares of
  Siebel Common Stock registered to be sold pursuant to each of the Company's
  registration statements on Form S-3 (Nos. 333-36967 and 333-40259) shall, on and
  after the payment date for the stock dividend, be twice the number of shares
  indicated in such registration statements.
  
  B.   SIEBEL SYSTEMS ANNOUNCES MERGER WITH SCOPUS TECHNOLOGY
  
       On March 2, 1998, the Company announced an agreement to merge with Scopus
  Technology, Inc. in a transaction to be accounted for as a "pooling of 
  interests" and intended to qualify as a tax-free reorganization. A press 
  release relating to the proposed transaction is attached hereto as Exhibit 
  99.1.
  
  ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS
  
       (c)  Exhibits
  
       EX.-99.1    Press Release dated March 2, 1998.
  SIGNATURES
  
       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.
  
                                 SIEBEL SYSTEMS, INC.
  
  Dated:    March 3, 1998        By: /s/ Howard H. Graham
                                    --------------------------------------------
                                     Howard H. Graham
                                     Senior Vice President, Finance and
                                     Administration and Chief Financial Officer
  
                                         5.