<PAGE>   1
     As filed with the Securities and Exchange Commission on June 25, 2001
                                                 Registration No. 333-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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

                               INKTOMI CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

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

              DELAWARE                                       94-3238130
  (STATE OR OTHER JURISDICTION OF                         (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)                      IDENTIFICATION NUMBER)

                              4100 E. THIRD AVENUE
                              FOSTER CITY, CA 94404
   (ADDRESS, INCLUDING ZIP CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

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

                      1998 NON-STATUTORY STOCK OPTION PLAN
                                1998 STOCK PLAN
                        1998 EMPLOYEE STOCK PURCHASE PLAN
                            (FULL TITLE OF THE PLAN)

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

                                 TIMOTHY STEVENS
                         VICE PRESIDENT OF CORPORATE AND
                        LEGAL AFFAIRS AND GENERAL COUNSEL
                              4100 E. THIRD AVENUE
                              FOSTER CITY, CA 94404
                                 (650) 653-2800
(NAME, ADDRESS, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF AGENT FOR SERVICE)

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

                                   Copies to:
                              KENTON J. KING, ESQ.
                      SKADDEN ARPS SLATE MEAGHER & FLOM LLP
                              525 UNIVERSITY AVENUE
                               PALO ALTO, CA 94301
                                 (650) 470-4500


<TABLE>
<CAPTION>
                                     CALCULATION OF REGISTRATION FEE
=============================================================================================================
                                                        PROPOSED MAXIMUM    PROPOSED MAXIMUM     AMOUNT OF
TITLE OF EACH CLASS OF SECURITIES     AMOUNT TO BE       OFFERING PRICE        AGGREGATE       REGISTRATION
        TO BE REGISTERED               REGISTERED           PER SHARE       OFFERING PRICE          FEE
-------------------------------------------------------------------------------------------------------------
<S>                                 <C>                 <C>                 <C>                <C>
Common Stock, $0.001 per
share par value: To be
issued under 1998
Non-Statutory Stock Option
Plan........................        6,034,349 shares        $7.86(1)         $47,429,983(1)       $11,858
Common Stock, $0.001 per
share par value:  To be
issued under 1998 Stock
Plan........................        2,453,282 shares        $7.86(1)         $19,282,797(1)        $4,821
Common Stock, $0.001 per
share par value:  To be
issued under 1998 Employee
Stock Purchase Plan.........          164,130 shares        $7.22(2)          $1,185,019(2)          $297
=============================================================================================================
</TABLE>

<PAGE>   2

(1)     Estimated in accordance with Rule 457(c) solely for the purpose of
        computing the amount of the registration fee based upon the average of
        the high and low sales prices of the Common Stock as reported on the
        Nasdaq National Market on June 18, 2001.

(2)     The exercise price of $7.22 per share, computed in accordance with rule
        457(h), is 85% of the opening price of a share of Common Stock of the
        Company as reported on the Nasdaq National Market on May 1, 2001, the
        current enrollment date. Pursuant to the 1998 Employee Stock Purchase
        Plan (Exhibit 4.3), shares are sold at 85% of the lesser of the fair
        market value of such shares on the Enrollment Date or on the Exercise
        Date.

<PAGE>   3

PART I:        INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

ITEM 1.        PLAN INFORMATION*

ITEM 2.        REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION*

* The documents(s) containing the information specified in Part I of Form S-8
have been or will be sent or given to employees as specified by Rule 428(b)(I)
under the Securities Act of 1933, as amended.

PART II:       INFORMATION REQUIRED IN REGISTRATION STATEMENT

ITEM 3.        INCORPORATION OF DOCUMENTS BY REFERENCE

        Inktomi Corporation hereby incorporates by reference in this
registration statement the following documents:

        1.     Inktomi's Annual Report on Form 10-K for the fiscal year ended
               September 30, 2000.

        2.     Inktomi's Quarterly Report on Form 10-Q for the fiscal quarter
               ended December 31, 1999.

        3.     Inktomi's Quarterly Report on Form 10-Q for the fiscal quarter
               ended March 31, 2000.

        4.     Inktomi's Quarterly Report on Form 10-Q for the fiscal quarter
               ended June 30, 2000.

        5.     Inktomi's Current Report on Form 8-K/A dated September 29, 2000
               relating to Inktomi's acquisition of Ultraseek Corporation.

        6.     Inktomi's Current Report on Form 8-K dated August 1, 2000
               relating to the acquisition of Ultraseek Corporation.

        7.     Inktomi's Current Report on Form 8-K dated October 15, 1999
               relating to Inktomi's acquisition of Webspective Software, Inc.

        8.     Inktomi's Current Report on Form 8-K dated July 14, 2000 relating
               to Inktomi's adoption of its Shareholders' Rights Plan.

        9.     Inktomi's Current Report on Form 425 dated September 14, 2000
               relating to the acquisition of FastForward Networks, Inc.

        10.    Inktomi's Current Report on Form 425 dated September 14, 2000
               relating to the acquisition of FastForward Networks, Inc.

        11.    Inktomi's Current Report on Form 425 dated September 15, 2000
               relating to the acquisition of FastForward Networks, Inc.

        12.    Inktomi's Current Report on Form 8-K dated December 3, 1999
               relating to Inktomi's stock split.

        13.    The description of Inktomi's Common Stock as contained in its
               Registration Statement on Form 8-A as filed with the Securities
               and Exchange Commission on May 22, 1998.

<PAGE>   4

        All documents subsequently filed by Inktomi pursuant to Sections 13(a),
13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended, prior to
the filing of a post-effective amendment to this registration statement which
indicates that all securities offered hereby have been sold or which deregisters
all securities remaining unsold, shall be deemed to be incorporated by reference
in this registration statement and to be a part hereof from the date of filing
of such documents. Any statement contained herein or in a document incorporated
or deemed to be incorporated by reference herein will be deemed to be modified
or superseded for purposes of this registration statement to the extent a
statement contained herein or in any subsequently filed document that is or is
deemed to be incorporated by reference herein modifies or supersedes such
previous statement. Any such statement so modified or superseded will not be
deemed to constitute a part of this registration statement, except as so
modified or superseded.

ITEM 4.        DESCRIPTION OF SECURITIES

        Not applicable.

ITEM 5.        INTERESTS OF NAMED EXPERTS AND COUNSEL

        The validity of the shares of common stock offered hereby has been
passed upon for Inktomi by Skadden, Arps, Slate, Meagher & Flom, LLP, Palo Alto,
California. As of the date of this prospectus, attorneys who are members of or
are employed by Skadden, Arps, Slate, Meagher & Flom, LLP and participating in
matters on behalf of Inktomi relating to this Registration Statement, do not
beneficially own any shares of Inktomi's Common Stock.

ITEM 6.        INDEMNIFICATION OF DIRECTORS AND OFFICERS

        Section 102 of the Delaware General Corporation Law, or the DGCL, as
amended, allows a corporation to eliminate the personal liability of directors
of a corporation to the corporation or its stockholders for monetary damages for
a breach of fiduciary duty as a director, except where the director breached his
duty of loyalty, failed to act in good faith, engaged in intentional misconduct
or knowingly violated a law, authorized the payment of a dividend, or approved a
stock repurchase in violation of Delaware corporate law or obtained an improper
personal benefit.

        Section 145 of the DGCL provides, among other things, that Inktomi may
indemnify any person who was or is a party or is threatened to be made a party
to any threatened, pending or completed action, suit or proceeding (other than
an action by or in the right of Inktomi) by reason of the fact that the person
is or was director, officer, agent or employee of Inktomi or is or was serving
at Inktomi's request as a director, officer, agent, or employee of another
corporation, partnership, joint venture, trust or other enterprise, against
expenses, including attorneys' fees, judgment, fines and amounts paid in
settlement actually and reasonably incurred by the person in connection with the
action, suit or proceeding. The power to indemnify applies (a) if the person is
successful on the merits or otherwise in defense of any action, suit or
proceeding, or (b) if the person acted in good faith and in a manner he
reasonably believed to be in the best interest, or not opposed to the best
interest, of Inktomi, and with respect to any criminal action or proceeding, had
no reasonable cause to believe his conduct was unlawful. The power to indemnify
applies to actions brought by or in the right of Inktomi as well, but only to
the extent of defense expenses (including attorneys' fees but excluding amounts
paid in settlement) actually and reasonably incurred and not to any satisfaction
of judgment or settlement of the claim itself, and with the further limitation
that in these actions no indemnification shall be made in the event of any
adjudication of negligence or misconduct in the performance of his duties to
Inktomi, unless the court believes that in light of all the circumstances
indemnification should apply.

<PAGE>   5

        Section 174 of the DGCL provides, among other things, that a director,
who willfully or negligently approves of an unlawful payment of dividends or an
unlawful stock purchase or redemption, may be held liable for these actions. A
director who was either absent when the unlawful actions were approved or
dissented at the time, may avoid liability by causing his or her dissent to
these actions to be entered in the books containing the minutes of the meetings
of the board of directors at the time the action occurred or immediately after
the absent director received notice of the unlawful acts.

        Article X of Inktomi's Amended and Restated Certificate of Incorporation
includes a provision that eliminates the personal liability of its directors for
monetary damages for breach of fiduciary duty as a director to the fullest
extent permitted under the DGCL.

        Article VI of Inktomi's Bylaws provides for the indemnification of
officers, directors, employees and agents of Inktomi to the fullest extent
permitted under the DGCL.

        Inktomi has entered into indemnification agreements with its directors
and executive officers, in addition to indemnification provided for in Inktomi's
Bylaws, and intends to enter into indemnification agreements with any new
directors and executive officers in the future.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers, or persons controlling Inktomi
pursuant to the foregoing provisions, Inktomi has been informed that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Securities Act and is therefore
unenforceable.

        At present, there is no pending litigation or proceeding involving a
director, officer, employee, or other agent of Inktomi in which indemnification
is being sought, nor is Inktomi aware of any threatened litigation that may
result in a claim for indemnification by any director, officer, employee, or
other agent of Inktomi.

 ITEM 7.       EXEMPTION FROM REGISTRATION CLAIMED

               Not applicable.

ITEM 8.        EXHIBITS

<TABLE>
<CAPTION>
          EXHIBIT
          NUMBER                             DOCUMENTS
          ------     -----------------------------------------------------------
          <S>        <C>
            4.1*     1998 Non-Statutory Stock Option Plan and form of agreements
                     thereunder

            4.2*     1998 Stock Plan and form of agreements thereunder

            4.3*     1998 Employee Stock Purchase Plan and form of agreements
                     thereunder

            5.1      Opinion of counsel as to legality of securities being
                     registered

           23.1      Consent of Counsel (contained in Exhibit 5.1)

           23.2      Consent of Independent Accountants

           24.1      Power of Attorney (see page II-5)
</TABLE>

<PAGE>   6

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

        *      Incorporated by reference to the Exhibits filed with Inktomi's
               Registration Statement on Form S-1 (no. 333-50247) as declared
               effective with the Securities and Exchange Commission on June 9,
               1998.


ITEM 9.        UNDERTAKINGS

        (a)    Rule 415 Offering

        The undersigned registrant hereby undertakes:

               (1) To file, during any period in which offers or sales are being
made, a post-effective amendment to this registration statement to include any
material information with respect to the plan of distribution not previously
disclosed in the registration statement or any material change to such
information in the registration statement;

               (2) That, for the purpose of determining any liability under the
Securities Act of 1933, as amended, each such post-effective amendment shall be
deemed to be a new registration statement relating to the Securities offered
therein, and the offering of such Securities at that time shall be deemed to be
the initial bona fide offering thereof.

               (3) To remove from registration by means of a post-effective
amendment any of the Securities being registered which remain unsold at the
termination of the offering.

        (b) Filing Incorporating Subsequent Exchange Act Documents by Reference.

        The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, as amended, each
filing of the registrant's annual report pursuant to Section 13(a) or Section
15(d) of the Exchange Act (and, where applicable, each filing of an employee
benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that
is incorporated by reference in the registration statement shall be deemed to be
a new registration statement relating to the Securities offered therein, and the
offering of such Securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (c) Request for Acceleration of Effective Date or Filing of Registration
Statement on Form S-8

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the Securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.

<PAGE>   7

                                   SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Foster City, State of California, on this 25th day of
June, 2001.

                                      INKTOMI CORPORATION


                                      By: /s/ Jerry M. Kennelly
                                          --------------------------------------
                                          Jerry M. Kennelly, Executive Vice
                                          President and Chief Financial Officer

                                POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints David C. Peterschmidt and Jerry M.
Kennelly, and each of them, as his or her attorney-in-fact, with full power of
substitution in each, for him or her in any and all capacities, to sign any
amendments to this Registration Statement on Form S-8 and to file the same, with
exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, hereby ratifying and confirming all that
each of said attorneys-in-fact, or his substitute or substitutes, may do or
cause to be done by virtue hereof.

        PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.

<TABLE>
<CAPTION>
               SIGNATURE                                  TITLE                         DATE
-------------------------------------     --------------------------------------    -------------
<S>                                       <C>                                       <C>

/s/ David C. Peterschmidt                 President, Chief Executive Officer        June 25, 2001
-------------------------------------     and Chairman (Principal Executive
David C. Peterschmidt                     Officer)


/s/ Jerry M. Kennelly                     Executive Vice President and Chief        June 25, 2001
-------------------------------------     Financial Officer (Principal
Jerry M. Kennelly                         Financial and Accounting Officer)


/s/ Eric A. Brewer                        Director                                  June 25, 2001
-------------------------------------
Eric A. Brewer


/s/ Frank Gill                            Director                                  June 25, 2001
-------------------------------------
Frank Gill


/s/ Fredric W. Harman                     Director                                  June 25, 2001
-------------------------------------
Fredric W. Harman


/s/ Alan F. Shugart                       Director                                  June 25, 2001
-------------------------------------
Alan F. Shugart
</TABLE>

<PAGE>   8

                               INKTOMI CORPORATION

                       REGISTRATION STATEMENT ON FORM S-8

                                INDEX TO EXHIBITS


<TABLE>
<CAPTION>
   EXHIBIT
   NUMBER                            DOCUMENTS
 -----------  ------------------------------------------------------------------
<S>           <C>
     4.1*     1998 Non-Statutory Stock Option Plan and form of agreements
              thereunder

     4.2*     1998 Stock Plan and form of agreements thereunder

     4.3*     1998 Employee Stock Purchase Plan and form of agreements
              thereunder

     5.1      Opinion of counsel as to legality of securities being registered

    23.1      Consent of Counsel (contained in Exhibit 5.1)

    23.2      Consent of Independent Accountants

    24.1      Power of Attorney (see page II-5)
</TABLE>

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

*       Incorporated by reference to the Exhibits filed with Inktomi's
        Registration Statement on Form S-1 (no. 333-50247) as declared effective
        by the Securities and Exchange Commission on June 9, 1998.
[{"type": "S-8", "sequence": "1", "filename": "f73622s-8.txt", "description": "FORM S-8", "secsgml_size_bytes": 21426}]
{"company-data": {"conformed-name": "INKTOMI CORP", "cik": "0001024302", "assigned-sic": "7373", "irs-number": "943238130", "state-of-incorporation": "DE", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-63742", "film-number": "1666497"}, "business-address": {"street1": "4100 E 3RD AVE", "city": "FOSTER CITY", "state": "CA", "zip": "94404", "phone": "6506532800"}, "mail-address": {"street1": "4100 EAST 3RD AVENUE", "city": "FOSTER CITY", "state": "CA", "zip": "94404"}}
1
     As filed with the Securities and Exchange Commission on June 25, 2001
                                                 Registration No. 333-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

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

                               INKTOMI CORPORATION
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

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

              DELAWARE                                       94-3238130
  (STATE OR OTHER JURISDICTION OF                         (I.R.S. EMPLOYER
   INCORPORATION OR ORGANIZATION)                      IDENTIFICATION NUMBER)

                              4100 E. THIRD AVENUE
                              FOSTER CITY, CA 94404
   (ADDRESS, INCLUDING ZIP CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

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

                      1998 NON-STATUTORY STOCK OPTION PLAN
                                1998 STOCK PLAN
                        1998 EMPLOYEE STOCK PURCHASE PLAN
                            (FULL TITLE OF THE PLAN)

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

                                 TIMOTHY STEVENS
                         VICE PRESIDENT OF CORPORATE AND
                        LEGAL AFFAIRS AND GENERAL COUNSEL
                              4100 E. THIRD AVENUE
                              FOSTER CITY, CA 94404
                                 (650) 653-2800
(NAME, ADDRESS, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF AGENT FOR SERVICE)

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

                                   Copies to:
                              KENTON J. KING, ESQ.
                      SKADDEN ARPS SLATE MEAGHER & FLOM LLP
                              525 UNIVERSITY AVENUE
                               PALO ALTO, CA 94301
                                 (650) 470-4500
CALCULATION OF REGISTRATION FEE
=============================================================================================================
                                                        PROPOSED MAXIMUM    PROPOSED MAXIMUM     AMOUNT OF
TITLE OF EACH CLASS OF SECURITIES     AMOUNT TO BE       OFFERING PRICE        AGGREGATE       REGISTRATION
        TO BE REGISTERED               REGISTERED           PER SHARE       OFFERING PRICE          FEE
-------------------------------------------------------------------------------------------------------------
Common Stock, $0.001 per
share par value: To be
issued under 1998
Non-Statutory Stock Option
Plan........................        6,034,349 shares        $7.86(1)         $47,429,983(1)       $11,858
Common Stock, $0.001 per
share par value:  To be
issued under 1998 Stock
Plan........................        2,453,282 shares        $7.86(1)         $19,282,797(1)        $4,821
Common Stock, $0.001 per
share par value:  To be
issued under 1998 Employee
Stock Purchase Plan.........          164,130 shares        $7.22(2)          $1,185,019(2)          $297
=============================================================================================================
2

(1)     Estimated in accordance with Rule 457(c) solely for the purpose of
        computing the amount of the registration fee based upon the average of
        the high and low sales prices of the Common Stock as reported on the
        Nasdaq National Market on June 18, 2001.

(2)     The exercise price of $7.22 per share, computed in accordance with rule
        457(h), is 85% of the opening price of a share of Common Stock of the
        Company as reported on the Nasdaq National Market on May 1, 2001, the
        current enrollment date. Pursuant to the 1998 Employee Stock Purchase
        Plan (Exhibit 4.3), shares are sold at 85% of the lesser of the fair
        market value of such shares on the Enrollment Date or on the Exercise
        Date.
3

PART I:        INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS

ITEM 1.        PLAN INFORMATION*

ITEM 2.        REGISTRANT INFORMATION AND EMPLOYEE PLAN ANNUAL INFORMATION*

* The documents(s) containing the information specified in Part I of Form S-8
have been or will be sent or given to employees as specified by Rule 428(b)(I)
under the Securities Act of 1933, as amended.

PART II:       INFORMATION REQUIRED IN REGISTRATION STATEMENT

ITEM 3.        INCORPORATION OF DOCUMENTS BY REFERENCE

        Inktomi Corporation hereby incorporates by reference in this
registration statement the following documents:

        1.     Inktomi's Annual Report on Form 10-K for the fiscal year ended
               September 30, 2000.

        2.     Inktomi's Quarterly Report on Form 10-Q for the fiscal quarter
               ended December 31, 1999.

        3.     Inktomi's Quarterly Report on Form 10-Q for the fiscal quarter
               ended March 31, 2000.

        4.     Inktomi's Quarterly Report on Form 10-Q for the fiscal quarter
               ended June 30, 2000.

        5.     Inktomi's Current Report on Form 8-K/A dated September 29, 2000
               relating to Inktomi's acquisition of Ultraseek Corporation.

        6.     Inktomi's Current Report on Form 8-K dated August 1, 2000
               relating to the acquisition of Ultraseek Corporation.

        7.     Inktomi's Current Report on Form 8-K dated October 15, 1999
               relating to Inktomi's acquisition of Webspective Software, Inc.

        8.     Inktomi's Current Report on Form 8-K dated July 14, 2000 relating
               to Inktomi's adoption of its Shareholders' Rights Plan.

        9.     Inktomi's Current Report on Form 425 dated September 14, 2000
               relating to the acquisition of FastForward Networks, Inc.

        10.    Inktomi's Current Report on Form 425 dated September 14, 2000
               relating to the acquisition of FastForward Networks, Inc.

        11.    Inktomi's Current Report on Form 425 dated September 15, 2000
               relating to the acquisition of FastForward Networks, Inc.

        12.    Inktomi's Current Report on Form 8-K dated December 3, 1999
               relating to Inktomi's stock split.

        13.    The description of Inktomi's Common Stock as contained in its
               Registration Statement on Form 8-A as filed with the Securities
               and Exchange Commission on May 22, 1998.
4

        All documents subsequently filed by Inktomi pursuant to Sections 13(a),
13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended, prior to
the filing of a post-effective amendment to this registration statement which
indicates that all securities offered hereby have been sold or which deregisters
all securities remaining unsold, shall be deemed to be incorporated by reference
in this registration statement and to be a part hereof from the date of filing
of such documents. Any statement contained herein or in a document incorporated
or deemed to be incorporated by reference herein will be deemed to be modified
or superseded for purposes of this registration statement to the extent a
statement contained herein or in any subsequently filed document that is or is
deemed to be incorporated by reference herein modifies or supersedes such
previous statement. Any such statement so modified or superseded will not be
deemed to constitute a part of this registration statement, except as so
modified or superseded.

ITEM 4.        DESCRIPTION OF SECURITIES

        Not applicable.

ITEM 5.        INTERESTS OF NAMED EXPERTS AND COUNSEL

        The validity of the shares of common stock offered hereby has been
passed upon for Inktomi by Skadden, Arps, Slate, Meagher & Flom, LLP, Palo Alto,
California. As of the date of this prospectus, attorneys who are members of or
are employed by Skadden, Arps, Slate, Meagher & Flom, LLP and participating in
matters on behalf of Inktomi relating to this Registration Statement, do not
beneficially own any shares of Inktomi's Common Stock.

ITEM 6.        INDEMNIFICATION OF DIRECTORS AND OFFICERS

        Section 102 of the Delaware General Corporation Law, or the DGCL, as
amended, allows a corporation to eliminate the personal liability of directors
of a corporation to the corporation or its stockholders for monetary damages for
a breach of fiduciary duty as a director, except where the director breached his
duty of loyalty, failed to act in good faith, engaged in intentional misconduct
or knowingly violated a law, authorized the payment of a dividend, or approved a
stock repurchase in violation of Delaware corporate law or obtained an improper
personal benefit.

        Section 145 of the DGCL provides, among other things, that Inktomi may
indemnify any person who was or is a party or is threatened to be made a party
to any threatened, pending or completed action, suit or proceeding (other than
an action by or in the right of Inktomi) by reason of the fact that the person
is or was director, officer, agent or employee of Inktomi or is or was serving
at Inktomi's request as a director, officer, agent, or employee of another
corporation, partnership, joint venture, trust or other enterprise, against
expenses, including attorneys' fees, judgment, fines and amounts paid in
settlement actually and reasonably incurred by the person in connection with the
action, suit or proceeding. The power to indemnify applies (a) if the person is
successful on the merits or otherwise in defense of any action, suit or
proceeding, or (b) if the person acted in good faith and in a manner he
reasonably believed to be in the best interest, or not opposed to the best
interest, of Inktomi, and with respect to any criminal action or proceeding, had
no reasonable cause to believe his conduct was unlawful. The power to indemnify
applies to actions brought by or in the right of Inktomi as well, but only to
the extent of defense expenses (including attorneys' fees but excluding amounts
paid in settlement) actually and reasonably incurred and not to any satisfaction
of judgment or settlement of the claim itself, and with the further limitation
that in these actions no indemnification shall be made in the event of any
adjudication of negligence or misconduct in the performance of his duties to
Inktomi, unless the court believes that in light of all the circumstances
indemnification should apply.
5

        Section 174 of the DGCL provides, among other things, that a director,
who willfully or negligently approves of an unlawful payment of dividends or an
unlawful stock purchase or redemption, may be held liable for these actions. A
director who was either absent when the unlawful actions were approved or
dissented at the time, may avoid liability by causing his or her dissent to
these actions to be entered in the books containing the minutes of the meetings
of the board of directors at the time the action occurred or immediately after
the absent director received notice of the unlawful acts.

        Article X of Inktomi's Amended and Restated Certificate of Incorporation
includes a provision that eliminates the personal liability of its directors for
monetary damages for breach of fiduciary duty as a director to the fullest
extent permitted under the DGCL.

        Article VI of Inktomi's Bylaws provides for the indemnification of
officers, directors, employees and agents of Inktomi to the fullest extent
permitted under the DGCL.

        Inktomi has entered into indemnification agreements with its directors
and executive officers, in addition to indemnification provided for in Inktomi's
Bylaws, and intends to enter into indemnification agreements with any new
directors and executive officers in the future.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers, or persons controlling Inktomi
pursuant to the foregoing provisions, Inktomi has been informed that in the
opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Securities Act and is therefore
unenforceable.

        At present, there is no pending litigation or proceeding involving a
director, officer, employee, or other agent of Inktomi in which indemnification
is being sought, nor is Inktomi aware of any threatened litigation that may
result in a claim for indemnification by any director, officer, employee, or
other agent of Inktomi.

 ITEM 7.       EXEMPTION FROM REGISTRATION CLAIMED

               Not applicable.

ITEM 8.        EXHIBITS
EXHIBIT
          NUMBER                             DOCUMENTS
          ------     -----------------------------------------------------------
4.1*     1998 Non-Statutory Stock Option Plan and form of agreements
                     thereunder

            4.2*     1998 Stock Plan and form of agreements thereunder

            4.3*     1998 Employee Stock Purchase Plan and form of agreements
                     thereunder

            5.1      Opinion of counsel as to legality of securities being
                     registered

           23.1      Consent of Counsel (contained in Exhibit 5.1)

           23.2      Consent of Independent Accountants

           24.1      Power of Attorney (see page II-5)
6

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

        *      Incorporated by reference to the Exhibits filed with Inktomi's
               Registration Statement on Form S-1 (no. 333-50247) as declared
               effective with the Securities and Exchange Commission on June 9,
               1998.

ITEM 9.        UNDERTAKINGS

        (a)    Rule 415 Offering

        The undersigned registrant hereby undertakes:

               (1) To file, during any period in which offers or sales are being
made, a post-effective amendment to this registration statement to include any
material information with respect to the plan of distribution not previously
disclosed in the registration statement or any material change to such
information in the registration statement;

               (2) That, for the purpose of determining any liability under the
Securities Act of 1933, as amended, each such post-effective amendment shall be
deemed to be a new registration statement relating to the Securities offered
therein, and the offering of such Securities at that time shall be deemed to be
the initial bona fide offering thereof.

               (3) To remove from registration by means of a post-effective
amendment any of the Securities being registered which remain unsold at the
termination of the offering.

        (b) Filing Incorporating Subsequent Exchange Act Documents by Reference.

        The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, as amended, each
filing of the registrant's annual report pursuant to Section 13(a) or Section
15(d) of the Exchange Act (and, where applicable, each filing of an employee
benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that
is incorporated by reference in the registration statement shall be deemed to be
a new registration statement relating to the Securities offered therein, and the
offering of such Securities at that time shall be deemed to be the initial bona
fide offering thereof.

        (c) Request for Acceleration of Effective Date or Filing of Registration
Statement on Form S-8

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the Securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Securities Act and will be governed by the final
adjudication of such issue.
7

                                   SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Foster City, State of California, on this 25th day of
June, 2001.

                                      INKTOMI CORPORATION

                                      By: /s/ Jerry M. Kennelly
                                          --------------------------------------
                                          Jerry M. Kennelly, Executive Vice
                                          President and Chief Financial Officer

                                POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints David C. Peterschmidt and Jerry M.
Kennelly, and each of them, as his or her attorney-in-fact, with full power of
substitution in each, for him or her in any and all capacities, to sign any
amendments to this Registration Statement on Form S-8 and to file the same, with
exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, hereby ratifying and confirming all that
each of said attorneys-in-fact, or his substitute or substitutes, may do or
cause to be done by virtue hereof.

        PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.
SIGNATURE                                  TITLE                         DATE
-------------------------------------     --------------------------------------    -------------
/s/ David C. Peterschmidt                 President, Chief Executive Officer        June 25, 2001
-------------------------------------     and Chairman (Principal Executive
David C. Peterschmidt                     Officer)

/s/ Jerry M. Kennelly                     Executive Vice President and Chief        June 25, 2001
-------------------------------------     Financial Officer (Principal
Jerry M. Kennelly                         Financial and Accounting Officer)

/s/ Eric A. Brewer                        Director                                  June 25, 2001
-------------------------------------
Eric A. Brewer

/s/ Frank Gill                            Director                                  June 25, 2001
-------------------------------------
Frank Gill

/s/ Fredric W. Harman                     Director                                  June 25, 2001
-------------------------------------
Fredric W. Harman

/s/ Alan F. Shugart                       Director                                  June 25, 2001
-------------------------------------
Alan F. Shugart
8

                               INKTOMI CORPORATION

                       REGISTRATION STATEMENT ON FORM S-8

                                INDEX TO EXHIBITS
EXHIBIT
   NUMBER                            DOCUMENTS
 -----------  ------------------------------------------------------------------
4.1*     1998 Non-Statutory Stock Option Plan and form of agreements
              thereunder

     4.2*     1998 Stock Plan and form of agreements thereunder

     4.3*     1998 Employee Stock Purchase Plan and form of agreements
              thereunder

     5.1      Opinion of counsel as to legality of securities being registered

    23.1      Consent of Counsel (contained in Exhibit 5.1)

    23.2      Consent of Independent Accountants

    24.1      Power of Attorney (see page II-5)
-------------

*       Incorporated by reference to the Exhibits filed with Inktomi's
        Registration Statement on Form S-1 (no. 333-50247) as declared effective
        by the Securities and Exchange Commission on June 9, 1998.