<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549

                                  FORM 10-Q/A

                               (Amendment No. 1)

              [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                  For the quarterly period ended June 30, 1999

                                       OR

             [_] TRANSACTION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                  For the transition period from _____ to _____

                             Commission File number

                             SAGENT TECHNOLOGY, INC.
             (Exact name of registrant as specified in its charter)

             DELAWARE                                          94-3225290
     (State or other jurisdiction  of                      (I.R.S. Employer
    incorporation or organization)                         Identification No.)

800 W. El Camino Real, Suite 300
Mountain View, California                                         94040
(Address of principal executive offices)                       (Zip Code)


                                 (650) 815-3100
              (Registrant's telephone number, including area code)

                                 Not Applicable
              (Former name, former address and former fiscal year,
                         if changed since last report)


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 [X] No [ ]

    The number of shares of the Registrant's Common Stock, $.001 par value per
share, outstanding at June 30, 1999 was 25,258,921.

     The undersigned registrant hereby amends its Quarterly Report on Form 10-Q
for the quarterly period ended June 30, 1999 by revising Item 5, 6, and Exhibit
99.1 to clarify that the financial statements provided for Sagent (UK) Limited
have been prepared in accordance with UK generally accepted accounting
principles.


                                  Page 1 of 5

<PAGE>   2


PART II.  OTHER INFORMATION

ITEM 5.   Other Information

          The registrant hereby includes financial statements and pro forma
          financial information as it pertains to Sagent (UK) Limited, a
          subsidiary acquired on June 11, 1999.

         (a)  Financial Statements of Business Acquired

                  The financial statements of Sagent (UK) Limited, prepared in
                  accordance with UK GAAP, are attached hereto as exhibit 99.1
                  and incorporated herein by this reference.

         (b)  Pro forma Financial Information

                  The unaudited pro forma financial information are attached
                  hereto as exhibit 99.2 and incorporated herein by this
                  reference.

ITEM 6.  Exhibits and Reports on Form 8-K

         (a) Exhibits
<TABLE>
<CAPTION>
             Exhibit
             Number              Description
             -------             -----------
             <S>                 <C>
              99.1               Financial Statements of Sagent (UK) Limited,
                                 prepared in accordance with UK GAAP
</TABLE>

         (b) Reports on Form 8-K

     The Company filed a report on Form 8-K on June 11, 1999 related to the
acquisition of Sagent UK, Ltd.

                                  Page 2 of 3
<PAGE>   3

                                   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 thereunto duly authorized.








                             SAGENT TECHNOLOGY, INC.
                                  (Registrant)




                                /s/ David Eliff


                               -------------------
                                  DAVID ELIFF
                        Executive Vice President, Finance
                           and Chief Financial Officer
                  (Principal Financial and Accounting Officer)

                                 March 9, 2001





                                  Page 3 of 3
<PAGE>   4

                                 EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit
Number              Description
-------             -----------
<S>                 <C>
 99.1               Financial Statements of Sagent (UK) Limited,
                    prepared in accordance with UK GAAP
</TABLE>