VIANT CORP
SC 13G, 2000-02-11
MISCELLANEOUS BUSINESS SERVICES
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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._______)*

                                Viant Corporation
- --------------------------------------------------------------------------------
                                (Name of Issuer)

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

                                    92553N107
- --------------------------------------------------------------------------------
                                 (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. 92553N107                                               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                       3,186,147 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

                                              3,186,147 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                                                                       3,186,147

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    14.2%

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

12           TYPE OF REPORTING PERSON*

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

</FN>
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 92553N107                                               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                       141,442 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 ("Mohr"),
              PERSON                          William H. Davidow ("Davidow"), Jonathan D. Feiber ("Feiber"), and
               WITH                           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

                                              141,442 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                                                                       141,442

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    .6%

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

12           TYPE OF REPORTING PERSON*

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


<PAGE>

<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 92553N107                                               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                       3,327,589 shares, of which 3,186,147 are directly owned  by MDV IV and
           OWNED BY EACH                      141,442  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

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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                                                                       3,327,589

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    14.8%

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

12           TYPE OF REPORTING PERSON*

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

</FN>
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 92553N107                                               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

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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                                                                       3,327,589

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    14.8%

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

12           TYPE OF REPORTING PERSON*

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

</FN>
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 92553N107                                               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                       63,317 shares.
           OWNED BY EACH
             REPORTING
              PERSON
               WITH
                                     -------- ------------------------------------------------------------------------

                                     6        SHARED VOTING POWER

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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
                                              63,317 shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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                                                                       3,390,906

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    15.1%

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

12           TYPE OF REPORTING PERSON*

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

</FN>
</TABLE>

<PAGE>
<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 92553N107                                               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                       783 shares.
           OWNED BY EACH
             REPORTING
              PERSON
               WITH
                                     -------- ------------------------------------------------------------------------

                                     6        SHARED VOTING POWER

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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
                                              783 shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442 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                                                                       3,328,372

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    14.8%

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

12           TYPE OF REPORTING PERSON*

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


<PAGE>




<TABLE>
<CAPTION>
<S>                                                                            <C>
- ----------------------------------------------------------                     --------------------------------------
CUSIP NO. 92553N107                                               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                       51,681 shares.
           OWNED BY EACH
             REPORTING
              PERSON
               WITH
                                     -------- ------------------------------------------------------------------------

                                     6        SHARED VOTING POWER

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442  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
                                              51,681 shares.
                                     -------- ------------------------------------------------------------------------

                                     8        SHARED DISPOSITIVE POWER

                                              3,327,589  shares,  of which  3,186,147 are directly  owned by MDV IV and
                                              141,442  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                                                                       3,379,270

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

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

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

11           PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
                                                                                                    15.0%

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

12           TYPE OF REPORTING PERSON*

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


<PAGE>

- ----------------------------------                   ---------------------------
CUSIP NO. 92553N107                     13 G             Page 9 of 14 Pages
- ----------------------------------                   ---------------------------


ITEM 1(a).        NAME OF ISSUER:

                  Viant Corporation

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
                  650 Townsend Avenue, Suite 375

                  San Francisco, California  94103

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:

                  92553N10

ITEM 3.           Not Applicable


<PAGE>

- ----------------------------------                   ---------------------------
CUSIP NO. 92553N107                     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. 92553N107                     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 Partners,  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. 92553N107                     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. 92553N107                     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. 92553N107                     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 Viant  Corporation 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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