BROADBASE SOFTWARE INC
SC 13G, 2000-02-11
BUSINESS SERVICES, NEC
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13G
                                 (Rule 13d-102)

 INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1 (b), (c)
                 AND (d) AND AMENDMENTS THERETO FILED PURSUANT
                                  TO 13d-2 (b)

                             (Amendment No._______)*


                            Broadbase Software, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)


                                  Common Stock
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    11130R100
- --------------------------------------------------------------------------------
                                 (CUSIP Number)


                                December 31, 1999
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

             [ ]     Rule 13d-1(b)

             [ ]     Rule 13d-1(c)

             [X]     Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

The Exhibit Index is found on page 13.

                         (Continued on following pages)




                               Page 1 of 14 Pages
<PAGE>



<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                   Page 2 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON

             I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
                      Mohr, Davidow Ventures IV, L.P. ("MDV IV")
                      Tax ID Number: 94-3218929
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware
- ------------ ---------------------------------------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       1,524,126 shares, except that Fourth MDV Partners, L.L.C. ("Fourth MDV
           OWNED BY EACH                      Partners"), the general partner of MDV IV, may be deemed to have sole
             REPORTING                        voting power, and Lawrence G. Mohr ("Mohr"), William H. Davidow
              PERSON                          ("Davidow"), Jonathan D. Feiber ("Feiber"), and Nancy Schoendorf
               WITH                           ("Schoendorf"),   the  members  of  Fourth MDV Partners, may be deemed
                                              to have shared power to vote these  shares.
                                     -------- ------------------------------------------------------------------------

                                     6        SHARED VOTING POWER
                                              See response to row 5.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER

                                              1,524,126 shares, except that Fourth MDV Partners, the general partner of
                                              MDV IV, may be deemed to have sole dispositive power, and Mohr, Davidow,
                                              Feiber, and Schoendorf, the members of Fourth MDV Partners, may be deemed
                                              to have shared power to dispose of these shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------ ---------------------------------------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       1,524,126

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    7.8%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

</FN>
</TABLE>

<PAGE>
<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                  Page 3 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON

             I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
                 MDV IV Entrepreneur's Network Fund, L.P. ("MDV IV Entrepreneur's Network Fund")
                      Tax ID Number: 94-3228281
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware
- ------------ ---------------------------------------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       66,485 shares, except that Fourth MDV Partners, L.L.C. ("Fourth MDV
           OWNED BY EACH                      Partners"), the general partner of MDV IV Entrepreneur's Network Fund,
             REPORTING                        may be deemed to have sole voting power, and Lawrence G. Mohr
              PERSON                          ("Mohr"), William H. Davidow ("Davidow"), Jonathan D. Feiber
               WITH                           ("Feiber"),  and Nancy  Schoendorf ("Schoendorf"),   the  members  of
                                              Fourth MDV Partners, may be deemed to have shared power to vote these
                                              shares.
                                     -------- ------------------------------------------------------------------------

                                     6        SHARED VOTING POWER
                                              See response to row 5.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER

                                              66,485 shares, except that Fourth MDV Partners, the general partner of
                                              MDV IV Entrepreneur's Network Fund, may be deemed to have sole
                                              dispositive power, and Mohr, Davidow, Feiber, and Schoendorf, the
                                              members  of Fourth  MDV  Partners, may be deemed to have shared power
                                              to dispose of these shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------ ---------------------------------------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       66,485

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    .3%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             PN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

</FN>
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                  Page 4 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON

             I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
                      Fourth MDV Partners, L.L.C. ("Fourth MDV Partners")
                      Tax ID Number: 94-3218931
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware
- ------------------------------------ -------- ------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
          OWNED BY EACH                       66,485  shares are directly  owned by MDV IV Entrepreneur's Network
             REPORTING                        Fund.  Fourth MDV Partners, the general partner of MDV IV and MDV IV
              PERSON                          Entrepreneur's Network Fund , may be deemed to have sole voting power,
               WITH                           and  Mohr,  Davidow,  Feiber,  and Schoendorf,  the members of Fourth
                                              MDV  Partners,  may be  deemed  to have  shared  power to vote  these
                                              shares.
                                     -------- ------------------------------------------------------------------------

                                     6        SHARED VOTING POWER
                                              See response to row 5.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 shares are directly owned by MDV IV Entrepreneur's Network
                                              Fund.  Fourth MDV Partners, the general partner of MDV IV and MDV IV
                                              Entrepreneur's Network Fund , may be deemed to have sole dispositive
                                              power, and Mohr, Davidow, Feiber, and Schoendorf, the members of
                                              Fourth MDV Partners, may be deemed to have shared power to dispose of
                                              these shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER
                                              See response to row 7.
- ------------------------------------ -------- ------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       1,590,611

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                              [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    8.1%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             OO
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>
<TABLE>
<CAPTION>
<S>                                                                            <C>

- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                  Page 5 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON
                      Lawrence G. Mohr, Jr. ("Mohr")
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       0 shares.
           OWNED BY EACH
             REPORTING               -------- ------------------------------------------------------------------------
              PERSON
               WITH                  6        SHARED VOTING POWER
                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund. Mohr is
                                              a general partner of Fourth MDV Partners, the general partner of MDV IV
                                              and MDV IV Entrepreneurs' Network Fund, and may be deemed to have shared
                                              power to vote these shares.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER

                                              0 shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund. Mohr is
                                              a general partner of Fourth MDV Partners, the general partner of MDV IV
                                              and MDV IV Entrepreneurs' Network Fund, and may be deemed to have shared
                                              power to dispose of these shares.
- ------------ ---------------------------------------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       1,590,611

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    8.1%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>
<TABLE>
<CAPTION>
<S>                                                                            <C>

- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                  Page 6 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON

                          William H. Davidow ("Davidow")
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       0 shares.
           OWNED BY EACH
             REPORTING               -------- ------------------------------------------------------------------------
              PERSON
               WITH                  6        SHARED VOTING POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund. Davidow
                                              is a general partner of Fourth MDV Partners, the general partner of MDV
                                              IV and MDV IV Entrepreneurs' Network Fund, and may be deemed to have
                                              shared power to vote these shares.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER
                                              0 shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund. Davidow
                                              is a general partner of Fourth MDV Partners, the general partner of MDV
                                              IV and MDV IV Entrepreneurs' Network Fund, and may be deemed to have
                                              shared power to dispose of these shares.
- ------------ ---------------------------------------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       1,590,611

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    8.1%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>
<TABLE>
<CAPTION>
<S>                                                                            <C>

- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                   Page 7 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON

                         Jonathan D. Feiber ("Feiber")
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       0 shares.
           OWNED BY EACH
             REPORTING               -------- ------------------------------------------------------------------------
              PERSON
               WITH                  6        SHARED VOTING POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund. Feiber
                                              is a general partner of Fourth MDV Partners, the general partner of MDV
                                              IV and MDV IV Entrepreneurs' Network Fund, and may be deemed to have
                                              shared power to vote these shares.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER
                                              0 shares.

                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund. Feiber
                                              is a general partner of Fourth MDV Partners, the general partner of MDV
                                              IV and MDV IV Entrepreneurs' Network Fund, and may be deemed to have
                                              shared power to dispose of these shares.

- ------------ ---------------------------------------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       1,590,611

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    8.1%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
</FN>
</TABLE>


<PAGE>
<TABLE>
<CAPTION>
<S>                                                                            <C>

- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 11130R100                                               13 G                  Page 8 of 14 Pages
- ----------------------------------------------------------                     --------------------------------------

- ------------ ---------------------------------------------------------------------------------------------------------

1            NAME OF REPORTING PERSON

                      Nancy J. Schoendorf ("Schoendorf")
- ------------ ---------------------------------------------------------------------------------------------------------

2            CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                    (a) [ ]            (b) [X]

- ------------ ---------------------------------------------------------------------------------------------------------

3            SEC USE ONLY

- ------------ ---------------------------------------------------------------------------------------------------------

4            CITIZENSHIP OR PLACE OF ORGANIZATION

                      U.S. Citizen
- ------------------------------------ -------- ------------------------------------------------------------------------
             NUMBER OF
              SHARES                 5        SOLE VOTING POWER
           BENEFICIALLY                       10,000 shares, issuable upon the exercise of a stock option.
           OWNED BY EACH
             REPORTING               -------- ------------------------------------------------------------------------
              PERSON
               WITH                  6        SHARED VOTING POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund.
                                              Schoendorf is a general partner of Fourth MDV Partners, the general
                                              partner of MDV IV and MDV IV Entrepreneurs' Network Fund, and may be
                                              deemed to have shared power to vote these shares.
                                     -------- ------------------------------------------------------------------------

                                     7        SOLE DISPOSITIVE POWER

                                              10,000 shares, issuable upon the exercise of a stock option.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              1,590,611 shares, of which 1,524,126 are directly owned by MDV IV and
                                              66,485 are directly owned by MDV IV Entrepreneurs' Network Fund.
                                              Schoendorf is a general partner of Fourth MDV Partners, the general
                                              partner of MDV IV and MDV IV Entrepreneurs' Network Fund, and may be
                                              deemed to have shared power to dispose of these shares.
- ------------ ---------------------------------------------------------------------------------------------------------

9            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
             REPORTING PERSON                                                                       1,600,611

- ------------ ---------------------------------------------------------------------------------------------------------

10           CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
             EXCLUDES CERTAIN SHARES*                                                               [ ]

- ------------ ---------------------------------------------------------------------------------------------------------

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    8.2%

- ------------ ---------------------------------------------------------------------------------------------------------

12           TYPE OF REPORTING PERSON*

             IN
- ------------ ---------------------------------------------------------------------------------------------------------
<FN>
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

</FN>
</TABLE>

<PAGE>





- -----------------------------                    -------------------------------
CUSIP NO. 11130R100                   13 G             Page 9 of 14 Pages
- -----------------------------                    -------------------------------

ITEM 1(a).        NAME OF ISSUER:

                  Broadbase Software, Inc.

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                  172 Constitution Drive

                  Menlo Park, California  94025

ITEM 2(a).        NAME OF PERSON FILING:

                  This statement is filed by Mohr,  Davidow Ventures IV, L.P., a
                  Delaware limited partnership ("MDV IV"), MDV IV Entrepreneurs'
                  Network Fund, L.P., a Delaware limited partnership, Fourth MDV
                  Partners,  L.L.C. ("Fourth MDV Partners"),  a Delaware limited
                  liability  company,  Lawrence  G. Mohr  ("Mohr"),  William  H.
                  Davidow ("Davidow"),  Jonathan D. Feiber ("Feiber"), and Nancy
                  Schoendorf   ("Schoendorf").   The   foregoing   entities  and
                  individuals  are  collectively  referred to as the  "Reporting
                  Persons".

                  Fourth MDV  Partners is the general  partner of MDV IV and MDV
                  IV Entrepreneurs' Network Fund, and may be deemed to have sole
                  power to vote  and sole  power to  dispose  of  shares  of the
                  issuer  directly  owned  by MDV IV and  MDV IV  Entrepreneurs'
                  Network Fund. Mohr,  Davidow,  Feiber,  and Schoendorf are the
                  general  partners/managing members of Fourth MDV Partners, and
                  may be deemed to have shared power to vote and shared power to
                  dispose of the shares of issuer  directly  owned by MDV IV and
                  MDV IV Entrepreneurs' Network Fund.

ITEM 2(b).        ADDRESS OF PRINCIPAL BUSINESS OFFICE, OR, IF NONE, RESIDENCE:

                  The address of the principal  business  office for each of the
                  Reporting Persons is:

                  Mohr, Davidow Ventures
                  2775 Sand Hill Road, Suite 240
                  Menlo Park, California  94025

ITEM 2(c)         CITIZENSHIP:

                  MDV IV and MDV IV  Entrepreneurs'  Network Fund,  are Delaware
                  limited  partnerships.  Fourth  MDV  Partners  is  a  Delaware
                  limited  liability  company.   Mohr,   Davidow,   Feiber,  and
                  Schoendorf are United States citizens.

ITEM 2(d).        TITLE OF CLASS OF SECURITIES:

                  Common Stock

ITEM 2(e).        CUSIP NUMBER:
                        11130R10

ITEM 3.           Not Applicable


<PAGE>

- -----------------------------                    -------------------------------
CUSIP NO. 11130R100                   13 G             Page 10 of 14 Pages
- -----------------------------                    -------------------------------

ITEM 4.           OWNERSHIP:

                  The following information with respect to the ownership of the
                  Common  Stock  of  the  issuer  by  the  persons  filing  this
                  Statement is provided as of December 31, 1999:

                      (a) Amount beneficially owned:

                           See Row 9 of cover page for each Reporting Person.

                      (b) Percent of Class:

                           See Row 11 of cover page for each Reporting Person.

                      (c) Number of shares as to which such person has:

                           (i) Sole power to vote or to direct the vote:

                                 See Row 5 of cover page for each Reporting
                                 Person.

                           (ii) Shared power to vote or to direct the vote:

                                 See Row 6 of cover page for each Reporting
                                 Person.

                           (iii) Sole power to dispose or to direct the
                                 disposition of:

                                 See Row 7 of cover page for each Reporting
                                 Person.

                           (iv) Shared power to dispose or to direct the
                                disposition of:

                                 See Row 8 of cover page for each Reporting
                                 Person.


<PAGE>

- -----------------------------                    -------------------------------
CUSIP NO. 11130R100                   13 G             Page 11 of 14 Pages
- -----------------------------                    -------------------------------

ITEM 5.           OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

                  If this statement is being filed to report the fact that as of
                  the date  hereof  the  reporting  person  has ceased to be the
                  beneficial  owner of more  than five  percent  of the class of
                  securities, check the following:  [ ] Yes

                  Not applicable

ITEM 6.           OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
                  PERSON:

                  Under   certain   circumstances   set  forth  in  the  limited
                  partnership  agreements  of MDV IV and  MDV IV  Entrepreneur's
                  Network Fund and the limited  liability  company  agreement of
                  Fourth MDV,  the general and limited  partners of each of such
                  entities may be deemed to have the right to receive  dividends
                  from, or the proceeds  from,  the sale of shares of the issuer
                  owned by each such entity of which they are a partner.

ITEM 7.           IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
                  ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
                  COMPANY:

                  Not applicable.

ITEM 8.           IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:

                  Not applicable

ITEM 9.           NOTICE OF DISSOLUTION OF GROUP:

                  Not applicable

ITEM 10.          CERTIFICATION:

                  Not applicable


<PAGE>



- -----------------------------                    -------------------------------
CUSIP NO. 11130R100                   13 G             Page 12 of 14 Pages
- -----------------------------                    -------------------------------

                                   SIGNATURES

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

Dated:  February 10, 2000

                              By: /s/  Nancy J. Schoendorf
                                  ----------------------------------------------
                                  Nancy J. Schoendorf, individually, and on
                                  behalf of MDV IV, in her capacity as a
                                  managing member of Fourth MDV Partners, the
                                  general partner of MDV IV, on behalf of MDV IV
                                  Entrepreneurs' Network Fund, in her capacity
                                  as a managing member of Fourth MDV, and on
                                  behalf of Fourth MDV Partners in her capacity
                                  as a managing member thereof.

                              By:    /s/  William H. Davidow
                                  ----------------------------------------------
                                     William H. Davidow

                              By:    /s/  Jonathan D. Feiber
                                  ----------------------------------------------
                                     Jonathan D. Feiber

                              By:    /s/ Lawrence G. Mohr, Jr.
                                  ----------------------------------------------
                                     Lawrence G. Mohr, Jr.


<PAGE>


- -----------------------------                    -------------------------------
CUSIP NO. 11130R100                   13 G             Page 13 of 14 Pages
- -----------------------------                    -------------------------------


                                  EXHIBIT INDEX

                                                                   Found on
                                                                 Sequentially
Exhibit                                                          Numbered Page
- -------                                                          -------------

Exhibit A: Agreement of Joint Filing                                  14





<PAGE>


- -----------------------------                    -------------------------------
CUSIP NO. 11130R100                   13 G             Page 14 of 14 Pages
- -----------------------------                    -------------------------------


                                    EXHIBIT A

         The  undersigned  hereby  agree  that a  single  Schedule  13G  (or any
amendment  thereto)  relating to the Common  Stock of Broadbase  Software,  Inc.
shall be filed on behalf  of each of the  undersigned  and that  this  Agreement
shall be filed as an exhibit to such Schedule 13G.

February 10, 2000

                                  /s/   Nancy  J.   Schoendorf
                                 -----------------------------------------------
                                  Nancy J. Schoendorf, individually, and on
                                  behalf of MDV IV, in her capacity as a
                                  managing member of Fourth MDV Partners, the
                                  general partner of MDV IV, on behalf of MDV IV
                                  Entrepreneurs' Network Fund, in her capacity
                                  as a managing member of Fourth MDV, and on
                                  behalf of Fourth MDV Partners in her capacity
                                  as a managing member thereof.

                                  /s/ William H. Davidow
                                 -----------------------------------------------
                                 William H. Davidow

                                  /s/ Jonathan D. Feiber
                                 -----------------------------------------------
                                 Jonathan D. Feiber

                                  /s/ Lawrence G. Mohr, Jr.
                                 -----------------------------------------------
                                  Lawrence G. Mohr, Jr.


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