Document:

EXHIBIT 10.2

                                 AMENDMENT NO. 1

                                       TO

                            INVESTOR RIGHTS AGREEMENT

                  Amendment No. 1, dated as of June 28, 2002 (the "AMENDMENT"),
to the Investor Rights Agreement, dated as of March 6, 2002 (the "INVESTOR
RIGHTS AGREEMENT"), among SAVVIS COMMUNICATIONS CORPORATION, a Delaware
corporation ("SAVVIS" or the "COMPANY"), WELSH, CARSON, ANDERSON & STOWE VIII,
L.P., a Delaware limited partnership ("WCAS"), REUTERS HOLDINGS SWITZERLAND SA,
a societe anonyme organized under the laws of Switzerland ("REUTERS"), the other
individuals and entities party to the Investor Rights Agreement. Capitalized
terms used herein and not otherwise defined have the meanings ascribed to them
in the Investor Rights Agreement.

                               W I T N E S S E T H

                  WHEREAS, Constellation Venture Capital II, L.P., a Delaware
limited partnership, Constellation Venture Capital Offshore II, L.P., a Cayman
Islands limited partnership, The BSC Employee Fund IV, L.P., a Delaware limited
partnership, and CVC II Partners, L.L.C., a Delaware limited liability company
(the "CONSTELLATION ENTITIES") are becoming, simultaneously herewith, parties to
the Investor Rights Agreement pursuant to a Joinder Agreement dated as of the
date hereof;

                  WHEREAS, pursuant to Section 12(f) of the Investor Rights
Agreement, the Company, WCAS and Reuters may modify or amend the Investor Rights
Agreement to provide for certain registration rights to the Constellation
Entities; and

                  WHEREAS, the Company, WCAS and Reuters wish to amend the
Investor Rights Agreement;

                  NOW, THEREFORE, in consideration of the premises herein
contained and for other good and valuable consideration, the receipt of which is
hereby acknowledged, the parties hereto agree as follows:

                                   ARTICLE I.
                                   AMENDMENTS

                  Section 1.01 Amendment to Preamble. The definition of "Other
Investors" set forth in the preamble to the Investor Rights Agreement is hereby
amended and restated in its entirety to read as follows:

                  "`OTHER INVESTORS' means the individuals and entities that
         hold Preferred Stock or Warrants that are listed under "Other
         Investors" on the signature pages hereto or become a party to this
<PAGE>

         Agreement in accordance with Section 10 hereof; provided, however, that
         the SAVVIS Stock holdings of the Constellation Entities shall be
         aggregated for the purposes of this definition."

                  Section 1.02 Amendment to "Whereas" Clause. The definition of
"Warrants" is hereby amended to include the "Constellation Warrants."

                  Section 1.03 Amendments to Section 1.

                  (a) Section 1 is hereby amended to add the following
definitions:

                  "`CONSTELLATION ENTITIES' means Constellation Venture Capital
         II, L.P., a Delaware limited partnership, Constellation Venture Capital
         Offshore II, L.P., a Cayman Islands limited partnership, The BSC
         Employee Fund IV, L.P., a Delaware limited partnership, and CVC II
         Partners, L.L.C., a Delaware limited liability company and their
         Permitted Transferees.

                  `CONSTELLATION WARRANTS' means the warrants to purchase an
         aggregate of 10,000,000 shares of Common Stock issued to the
         Constellation Entities on the date hereof."

                  (b) The following definition in Section 1 is hereby amended
and restated in its entirety to read as follows:

                  ""ELIGIBLE INVESTOR' means at any time (a) WCAS or its
         Permitted Transferees, Reuters, the Constellation Entities (considered
         together as one Person) or any Other Investor (other than Nortel
         Networks or GECC), so long as such Person owns Preferred Stock
         representing at least ten percent (10%) of the then outstanding voting
         power of Savvis and (b) WCAS (together with its Affiliates), Reuters,
         the Constellation Entities (considered together as one Person) or any
         Other Investor (other than Nortel Networks or GECC), so long as each
         such Person owns Savvis Stock representing at least five percent (5%)
         of the outstanding Savvis voting power."

                  Section 1.04 Amendments to Section 3(a). Section 3(a) is
hereby amended and restated in its entirety to read as follows:

                  "(a) Demand Registration Rights. If SAVVIS shall at any time
         after the Effective Date, be requested by WCAS, Reuters, a
         Constellation Entity, any Other Investor (other than a Constellation
         Entity) constituting an Eligible Investor or the holders of at least
         25% of the Covered Warrant Common Shares (other than Covered Warrant
         Common Shares issued or issuable upon exercise of the Constellation
         Warrants) in a writing that states the number of shares of Restricted
         Stock to be sold and the intended method of disposition thereof (each
         such written request, a "DEMAND NOTICE"), to effect a registration
         under the Securities Act of all or any portion of the Restricted Stock
         then held by such person or issuable upon conversion of Preferred Stock
         or upon exercise of Warrants or Constellation Warrants then held by
         such person, SAVVIS shall immediately notify in writing (each such
         notice, a "DEMAND FURTHER NOTICE") each other Investor (other than the

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<PAGE>

         requesting Investor) of such proposed registration and shall use its
         reasonable best efforts to register under the Securities Act (each such
         registration, a "DEMAND REGISTRATION"), for public sale in accordance
         with the method of disposition specified in such Demand Notice, the
         number of shares of Restricted Stock specified in such Demand Notice
         (plus the number of shares of Restricted Stock specified in any written
         requests for registration of shares of Restricted Stock that are
         received from other Investors (other than the requesting Investors)
         within 30 days after receipt by such other Investors of a Demand
         Further Notice). Notwithstanding anything to the contrary contained
         herein, SAVVIS shall not be obligated pursuant to this paragraph (a) to
         file and cause to become effective (i) more than two Demand
         Registrations in the aggregate requested by WCAS or its Permitted
         Transferees, two Demand Registrations in the aggregate requested by
         Reuters or its Permitted Transferees, two Demand Registrations in the
         aggregate requested by the Constellation Entities or their Permitted
         Transferees, two Demand Registrations in aggregate requested by Other
         Investors (other than the Constellation Entities) constituting Eligible
         Investors, and one Demand Registration by holders of the Covered
         Warrant Common Shares (other than Covered Warrant Common Shares issued
         or issuable upon exercise of the Constellation Warrants) or (ii) any
         Demand Registration with a proposed aggregate offering price of less
         than $25.0 million."

                  Section 1.05 Amendment to Section 3(c)(iii). Section 3(c)(iii)
is hereby amended to add a proviso to the end to read as follows:

         "; provided, however, that with respect to any request for a Demand
         Registration or Short Form Registration requested by any of the
         Constellation Entities, none of the WCAS Investors may sell shares in
         such registration unless the Constellation Entities are permitted to
         sell in such registration at least 50% of the shares of the Restricted
         Stock that they requested to be included."

                  Section 1.06 Amendment to Section 3(d). Section 3(d) is hereby
amended to add the following after the words "for sale to the public," in the
first sentence thereof:

                  "(other than a Demand registration or Short Form Registration
         pursuant to Sections 3(a) or 3(b) hereof)"

                  Section 1.07 Amendment to Section 3(e). Section 3(e) is hereby
amended to add a second proviso to the end of the clause to read as follows:

         "provided, further, however, that the Constellation Entities may make a
         distribution in kind of their shares of Restricted Stock to their
         limited partners or members during such period of distribution so long
         as limited partners or members agree to be bound by the terms of this
         Section 3(e)."

                  Section 1.08 Amendment to Section 12(d). Clause (ii) of the
proviso at the end of the third sentence of Section 12(d) is hereby amended and
restated in its entirety to read as follows:

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<PAGE>

                  "(ii) the rights of Investors (other than Nortel Networks,
         GECC and the Constellation Entities) under Section 3(a) will not be
         transferable to or exercisable by a Permitted Transferee unless such
         Permitted Transferee purchases and continues to hold Restricted Stock
         representing at least five (5%) (on a fully diluted basis) of the
         voting capital stock of SAVVIS."

                                  ARTICLE II.
                                  MISCELLANEOUS

                  Section 2.01 Headings. Headings of sections and paragraphs of
this Amendment are inserted for convenience of reference only and shall not
affect the interpretation or be deemed to constitute a part hereof.

                  Section 2.02 Severability. In the event that any one or more
of the provisions contained in this Amendment or in any other instrument
referred to herein shall, for any reason, be held to be invalid, illegal or
unenforceable, such invalidity, illegality or unenforceability shall not affect
any other provisions of this Amendment.

                  Section 2.03 Governing Law. This Amendment shall be governed
by and construed in accordance with the laws of the State of New York, without
regard to the conflicts of laws provisions thereof.

                  Section 2.04 Counterparts. This Amendment may be executed in
any number of counterparts, and each such counterpart hereof shall be deemed to
be an original instrument, but all such counterparts together shall constitute
but one agreement.

                  Section 2.05 Continuing Effect of Investor Rights Agreement.
This Amendment shall not constitute an amendment or waiver of any other
provision of the Investor Rights Agreement not expressly referred to herein.
Except as expressly amended hereby, the provisions of the Investor Rights
Agreement shall remain in full force and effect.

                  Section 2.06 Effectiveness. This Amendment shall become
effective on the date hereof.

                  Section 2.07 Joinder. WCAS and the Company hereby consent to
the Constellation Entities becoming parties to the Investor Rights Agreement.

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<PAGE>

                  IN WITNESS WHEREOF, each of the parties hereto has duly
executed and delivered this Amendment as of the day and year first above
written.

                            SAVVIS COMMUNICATIONS CORPORATION

                            By: /s/ Lane H. Blumenfeld
                                Name: Lane H. Blumenfeld
                                Title: Vice President and Acting General Counsel

                            WELSH, CARSON, ANDERSON
                              & STOWE VIII, L.P.

                            By WCAS VIII Associates LLC,
                               General Partner

                               By: /s/ John Rather
                                   Name: John Rather
                                   Title: Managing Member

                            REUTERS HOLDINGS SWITZERLAND SA

                            By: /s/ Eric Lint
                                Name: Eric Lint
                                Title: Attorney-In-Fact

                                       5EXHIBIT 10.3

                                JOINDER AGREEMENT

         This JOINDER AGREEMENT, dated as of June 28, 2002, between SAVVIS
Communications Corporation, a Delaware corporation (the "COMPANY") and
Constellation Venture Capital II, L.P., a Delaware limited partnership,
Constellation Venture Capital Offshore II, L.P., a Cayman Islands Limited, The
BSC Employee Fund IV, L.P., a Delaware limited parntership, and CVC Partners,
L.L.C., a Delaware limited liability company (each a "JOINING PARTY" and,
collectively, the "JOINING PARTIES").

                  WHEREAS, the Company and certain other entities are parties to
an Investor Rights Agreement dated as of March 6, 2002 (the "INVESTOR RIGHTS
AGREEMENT");

                  WHEREAS, Section 10 of the Investor Rights Agreement provides
that upon the express written consent of WCAS and the Company, any other holder
of Preferred Stock may become a party to the Investor Rights Agreement and
become an "OTHER INVESTOR" thereunder to the extent such other holder agrees in
writing to become a party to the Investor Rights Agreement and to assume the
rights and obligations of an Other Investor thereunder; and

                  WHEREAS, each of the Joining Parties wishes to join and become
a party to the Investor Rights Agreement, and the Company and WCAS have
consented to the Joining Parties becoming a party thereto;

                  NOW, THEREFORE, in consideration of the foregoing, the parties
hereto hereby agree as follows:

                  1.       Definitions.
                           -----------

                  Capitalized terms used and not otherwise defined in this
Agreement have the meanings attributed to such terms in the Investor Rights
Agreement.

                  2.       Joinder; Purchase of Other Preferred Stock.
                           ------------------------------------------

                  Each of the Joining Parties hereby becomes a party to and
assumes the rights and obligations of an Other Investor under the Investor
Rights Agreement. The Company and the Joining Parties each acknowledge that the
term "Other Investor," as defined in the Investor Rights Agreement, includes the
Joining Parties and that the rights and obligations of the Joining Parties as an
Other Investor are set forth in the Investor Rights Agreement.

                  3.       Acknowledgment.
                           --------------

                  Each of the Joining Parties acknowledges that it has received
a copy of the Investor Rights Agreement.

                  4.       Notice.
                           ------
<PAGE>

                  For purposes of Section 12(g) of the Investor Rights
Agreement, the Joining Parties' addresses and facsimile numbers are:

                           Address: Constellation Venture Capital II, L.P.
                                    383 Madison Avenue
                                    28th Floor
                                    New York, New York 10179
                                    Facsimile: (212) 272-9256
                                    Attention: Ronald Celmer

                  with a copy to:

                           Morgan, Lewis & Bockius LLP
                           101 Park Avenue
                           New, York, New York 10178
                           Fax: (212) 309-6273
                           Attention: Ira White, Esq.

                  5.       Governing Law.
                           -------------

                  This Agreement shall be governed in all respects by the laws
of the State of New York, without reference to the conflict of laws principles
thereof.

                  6.       Counterparts.
                           ------------

                  This Agreement may be executed in any number of counterparts,
can each such counterpart hereof shall be deemed to be an original instrument,
but all such counterparts together shall constitute but one agreement.

                                    * * * * *

                                       2
<PAGE>

                  IN WITNESS WHEREOF, the parties hereto have executed and
delivered this Agreement as of the date first above stated.

                                 SAVVIS COMMUNICATIONS CORPORATION

                                 By: /s/ Lane H. Blumenfeld
                                     Name: Lane H. Blumenfeld
                                     Title: Vice President and
                                            Acting General Counsel

                                 CONSTELLATION VENTURE CAPITAL II, L.P.

                                 By: Constellation Ventures Management, L.L.C.,
                                     its General Partner

                                 By: The Bear Stearns Companies, Inc.,
                                     its Managing Member

                                     By: /s/ Clifford H. Friedman
                                         Name: Clifford H. Friedman
                                         Title: SMD

                                 CONSTELLATION VENTURE CAPITAL OFFSHORE II, L.P.

                                 By: Constellation Ventures Management, L.L.C.,
                                     its General Partner

                                 By: The Bear Stearns Companies, Inc.,
                                     its Managing Member

                                     By: /s/ Clifford H. Friedman
                                         Name: Clifford H. Friedman
                                         Title: SMD

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<PAGE>

                                 THE BSC EMPLOYEE FUND IV, L.P.

                                 By: Constellation Ventures Management, L.L.C.,
                                     its General Partner

                                 By: The BSCGP, Inc.,
                                     its Managing Member

                                     By: /s/ Clifford H. Friedman
                                         Name: Clifford H. Friedman
                                         Title: SMD

                                 CVC II PARTNERS, L.L.C.

                                 By: /s/ Clifford H. Friedman
                                     Name: Clifford H. Friedman
                                     Title: SMD

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