EXHIBIT 10.1

                        SAVVIS COMMUNICATIONS CORPORATION
                       1999 STOCK OPTION PLAN, AS AMENDED

SECTION 1.  PURPOSE.

         The  purpose of the Plan is to  attract,  retain,  motivate  and reward
employees  of, and other  individuals  providing  services  to, the  Company and
Related Companies with stock-related compensation arrangements.

SECTION 2.  MAXIMUM NUMBER OF SHARES.

         (a) The maximum number of shares of Stock which may be issued  pursuant
to Options under the Plan,  and the maximum  number of shares for which ISOs may
be granted under the Plan, shall be 24,000,000 shares,  subject to adjustment as
provided in Section 8. For this purpose:

                  (i) The number of shares underlying an Option shall be counted
         against the Plan maximum ("used") at the time of grant.

                  (ii) If the  number  of  shares  underlying  an  Option is not
         determinable at the time of grant, the Committee shall determine at the
         time of grant a number of  shares  which is  deemed  to  underlie  such
         Option;  that number may be adjusted after grant as the Committee deems
         appropriate.

                  (iii)  Shares which  underlie  Options that (in whole or part)
         expire,  terminate, are forfeited, or otherwise become non-payable,  or
         which are  recaptured  by the Company in  connection  with a forfeiture
         event,  may be re-used in new grants to the extent of such  expiration,
         termination, forfeiture, non-payability, or recapture.

                  (iv) Shares of Stock  delivered  under the Plan in settlement,
         assumption or  substitution  of outstanding  awards (or  obligations to
         grant future awards) under the plans or  arrangements of another entity
         shall not reduce the maximum  number of shares of Stock  available  for
         delivery under the Plan, to the extent that such settlement, assumption
         or  substitution  occurs as a result of the Company  acquiring  another
         entity (or an interest in another entity).

         (b) In its  discretion,  the  Company  may  issue  treasury  shares  or
authorized but previously unissued shares.

SECTION 3.  ELIGIBILITY.

         Grants may be made under the Plan to: (i) any  employee  of the Company
or of any Related  Company,  including  any such  employee  who is an officer or
director of the Company or a Related  Company,  as the Board shall determine and
designate  from time to time (ii) any  non-employee  members of the Board or the
board of directors of any Related Company,  and (iii) any other individual whose
participation  in the  Plan is  determined  to be in the best  interests  of the
Company by the Board.



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SECTION 4.  GENERAL PROVISIONS RELATING TO OPTIONS.

         (a) Subject to the limitations in the Plan, the Committee may cause the
Company to grant Options to such Eligible  Participants,  at such times, of such
types, in such amounts,  for such periods,  becoming  exercisable at such times,
with such features,  with such option  prices,  and subject to such other terms,
conditions,  and  restrictions as the Committee deems  appropriate.  Each Option
shall be evidenced  by a written  Option  Agreement  between the Company and the
Optionee.  In granting an Option, the Committee may take into account any factor
it deems appropriate and consistent with the purpose of the Plan.

         (b) All or any portion of any payment to an  Optionee,  whether in cash
or shares of Stock,  may be  deferred  to a later date if and as provided in the
Option  Agreement.  Deferrals  may be for such  periods  and upon such terms and
conditions (including the provision of interest,  dividend equivalents, or other
return on such  amounts) as the  Committee  may  determine.  The  Committee  may
structure Option  Agreements so that the imposition of income and other taxes on
Optionees is deferred in whole or part.

         (c)  Option  Agreements  may  contain  any  provision  approved  by the
Committee  relating to the period for exercise or vesting after  termination  of
employment.  Except to the extent  otherwise  expressly  provided  in the Option
Agreement,  termination of employment  includes separation from the Company or a
Related  Company  for  any  reason,  including  death,  Disability,  retirement,
resignation,  dismissal,  disposition of an operation (whether by stock or asset
sale or otherwise) or any other event.

         (d) Option Agreements may, in the discretion of the Committee,  contain
a provision  permitting  an Optionee to designate the person who may exercise or
receive an Option upon the  Optionee's  death,  either by will or by appropriate
notice to the Company.

         (e) An  Optionee  shall have none of the rights of a  shareholder  with
respect to shares of Stock  covered by his or her Option until shares are issued
in his or her name.

         (f) The Committee may provide in Option Agreements that Options, except
for ISO's are  transferable.  Transferability  may be subject to such conditions
and  limitations  as the  Committee  deems  appropriate.  Except  to the  extent
otherwise  expressly  set forth in the Option  Agreement,  Options  shall not be
transferable other than by will or the laws of descent and distribution, and (if
exercise is required) shall be exercisable  during the Optionee's  lifetime only
by the Optionee or his or her guardian or legal representative.

SECTION 5. OPTIONS.

         (a) Except as provided in Section  8(b),  the option price per share of
ISOs  shall not be less than Fair  Market  Value per share of Stock on the ISO's
grant date,  nor less than the par value of a share of Stock.  The Option  price
per share of NQSO's shall not be less than the par value of a share of stock.

         (b) The  grant of  Options  and their  related  Option  Agreement  must
clearly identify the Options as either ISOs or as NQSOs.


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SECTION 6.  STOCK ISSUANCE, PAYMENT, AND WITHHOLDING.

         (a) An Optionee may pay the purchase  price in cash,  Stock but only if
the Stock is publicly  traded,  or other  property,  to the extent  permitted or
required by the Option  Agreement or the Committee  from time to time. The Stock
will be  treated  as  publicly  traded if the Stock is listed on an  established
national or regional  stock exchange or is admitted to quotation on the National
Association of Securities  Dealers  Automated  Quotation  System, or is publicly
traded in an established  securities  market. The Committee may permit deemed or
constructive  transfers  of  shares  in lieu of  actual  transfer  and  physical
delivery of certificates. Except to the extent prohibited by applicable law, the
Committee or its delegate may take any necessary or  appropriate  steps in order
to  facilitate  the  payment of any such  option  price.  Without  limiting  the
foregoing,  the Committee may allow the Optionee to defer payment of such option
price,  or may cause the Company to loan the option  price to the Optionee or to
guaranty that any shares to be issued will be delivered to a broker or lender in
order to allow the  Optionee  to borrow  the option  price.  The  Committee  may
provide,  by  inclusion of  appropriate  language in an Option  Agreement,  that
payment in full of the option  price need not  accompany  the written  notice of
exercise  provided that the notice of exercise  directs that the  certificate or
certificates  for the  shares  of Stock for which  the  Option is  exercised  be
delivered to a licensed  broker  acceptable  to the Company as the agent for the
individual   exercising  the  Option  and,  at  the  time  such  certificate  or
certificates  are  delivered,  the broker  tenders to the Company  cash (or cash
equivalents  acceptable to the Company) equal to the option price for the shares
of Stock  purchased  pursuant to the  exercise of the Option plus the amount (if
any) of Required  Withholding  Taxes. The Committee may require  satisfaction of
any rules or  conditions  in  connection  with paying the purchase  price at any
particular time, in any particular form, or with the Company's assistance.

         (b) If shares  used to pay any such  option  price are  subject  to any
prior restrictions imposed in connection with any plan of the Company (including
the  Plan),  an equal  number  of the  shares of Stock  purchased  shall be made
subject to such prior  restrictions  in  addition  to any  further  restrictions
imposed on such purchased shares by the terms of the Option Agreement or Plan.

         (c) When the obligation arises to collect and pay Required  Withholding
Taxes,  the Optionee shall promptly  reimburse the Company or a Related  Company
for the amount of such  Required  Withholding  Taxes in cash,  unless the Option
Agreement or the Committee  permits or requires  payment in another form. In the
discretion of the Committee or its delegate and at the Optionee's  request,  the
Committee or its  delegate may cause the Company or a Related  Company to pay to
the  appropriate  taxing  authority  Withholding  Taxes in  excess  of  Required
Withholding  Taxes on behalf of an Optionee,  which shall be  reimbursed  by the
Optionee.  In the Option  Agreement or  otherwise,  the  Committee  may allow an
Optionee  to  reimburse  the  Company  or  a  Related  Company  for  payment  of
Withholding  Taxes with shares of Stock or other  property.  The  Committee  may
require the  satisfaction  of any rules or  conditions  in  connection  with any
non-cash payment of Withholding Taxes.

         (d) If  provided  in the  Option  Agreement  relating  to an  ISO,  the
Committee  may prohibit the transfer by an Optionee of shares of Stock issued to
him or her upon exercise of an ISO into the name of a nominee, and the Committee
may require the placement of a legend on certificates for such shares reflecting
such prohibition.



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SECTION 7.  FORFEITURES.

         (a) The  Committee may include in any Option  Agreement any  provisions
relating to forfeitures of Options that it deems  appropriate.  Such  forfeiture
provisions may include, among others, prohibitions on competing with the Company
or any Related Company and other detrimental conduct.  Forfeiture provisions for
one Option may differ  from those for  another  Option.  As used in the Plan,  a
"forfeiture"  of an Option includes the recapture of economic  benefits  derived
from an Option,  as well as the  forfeiture of an Option  itself;  however,  the
Committee  may define the term more  narrowly in specific  Option  Agreements or
contexts.

         (b) Option  Agreements  may provide  for any  forfeiture  provision  to
terminate or be waived upon an acceleration  date pursuant to Section 8 or 9. In
its  discretion,  the  Committee  may  provide in any Option  Agreement  for the
termination  of any  forfeiture  provision  upon the  happening of any specified
event, and may terminate or waive any forfeiture provision by action taken after
grant.

SECTION 8.  ADJUSTMENTS AND ACQUISITIONS.

         (a) In the event of (i) any change in the  outstanding  shares of Stock
by  reason  of any  stock  split  (excluding  the July 22,  1999  stock  split),
combination of shares, stock dividend, reorganization, merger, consolidation, or
other  corporate  change  having a similar  effect,  (ii) any  separation of the
Company  including a spin-off or other  distribution of stock or property by the
Company, or (iii) any distribution to shareholders generally other than a normal
dividend, the Committee shall make such equitable adjustments to the Plan and to
outstanding  Options  as it shall  deem  appropriate  in order  to  prevent  the
dilution or enlargement  of (A) the Options which may be granted,  the shares of
Stock which may be issued, or the shares for which ISOs may be granted under the
Plan, or (B) the economic value of outstanding Options, provided,  however, that
the Committee shall not make any adjustment  which would constitute or result in
an increase in the aggregate number of Shares available under the Plan requiring
shareholder  approval under Section 422 of the Code. Any such  determination  by
the Committee shall be conclusive and binding on all concerned.

         (b) In the event the Company  enters into a  transaction  described  in
Section 424(a) of the Code with any other  corporation,  the Committee may grant
Options to employees or former  employees of such corporation in substitution of
stock awards,  stock appreciation  rights or limited stock  appreciation  rights
(respectively)  previously  granted to them by such  corporation upon such terms
and  conditions  as shall be necessary  to qualify such grant as a  substitution
described in Section 424(a) of the Code.

         (c) Upon the  dissolution  or  liquidation  of the  Company,  or upon a
merger,  consolidation or  reorganization  of the Company with one or more other
entities in which the  Company is not the  surviving  entity,  or upon a sale of
substantially  all of the assets of the Company to another person or entity,  or
upon any transaction (including,  without limitation, a merger or reorganization
in which the Company is the surviving entity) approved by the Board that results
in any person or entity  (other  than  persons  who are  holders of stock of the
Company at the time the Plan is approved by the  stockholders  and other than an
affiliate) owning 80 percent or more of the combined voting power of all classes
of stock of the Company,  the Plan and all Options  outstanding  hereunder shall
terminate, except to the extent provision is made in connection with



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such  transaction for the  continuation of the Plan and/or the assumption of the
Options  theretofore  granted,  or for the  substitution for such Options of new
options  covering  the stock of a successor  entity,  or a parent or  subsidiary
thereof,  with appropriate  adjustments as to the number and kinds of shares and
exercise prices, in which event the Plan and Options  theretofore  granted shall
continue in the manner and under the terms so provided. In the event of any such
termination  of the Plan,  each  Optionee  shall have the right  (subject to the
general  limitations  on  exercise  set forth  herein  and  except as  otherwise
specifically  provided  in  the  Option  Agreement  relating  to  such  Option),
immediately  prior to the occurrence of such  termination and during such period
occurring  prior to such  termination  as the  Committee in its sole  discretion
shall  designate,  to exercise  such Option in whole or in part,  whether or not
such Option was otherwise  exercisable at the time such termination  occurs, but
subject  to any  additional  provisions  that  the  Committee  may,  in its sole
discretion,  include in any Option  Agreement.  The Committee shall send written
notice of an event that will result in such a  termination  to all Optionees not
later  than  the  time  at  which  the  Company  gives  notice  thereof  to  its
stockholders.  Nothwithstanding the foregoing (but only if expressly provided in
any option agreement),  in the event of a transaction  described in this Section
8(c), the Board of Directors may, in its sole discretion, cancel any outstanding
Options  (provided,  however,  that the  limitations  of Section 424 of the Code
shall apply with respect to  adjustments  made to ISO's) and pay or deliver,  or
cause to be paid or  delivered,  to the  holder  thereof  an  amount  in cash or
securities  having a value (as  determined  by the Board of Directors  acting in
good  faith)  equal to the  product of (A) the number of shares of Common  Stock
(the "Option Shares") that, as of the date of consummation of such  transaction,
the  holder  of such  Option  had  become  entitled  to  purchase  (and  had not
purchased)  multiplied  by (B) the  amount,  if any, by which (1) the formula or
fixed price per share paid to holders of shares of Common Stock pursuant to such
transaction exceeds (2) the options price applicable to such Option Shares.

SECTION 9.  ACCELERATION.

         (a) The Committee may  accelerate the date on which any Option or stock
issued pursuant to an Option shall vest and may remove any  restrictions on such
Option  at any  time  after  grant  and  for  any  reason  the  Committee  deems
appropriate.

         (b) All Options,  and all shares of Stock issued pursuant to an Option,
shall  automatically  vest upon a termination of employment caused by the death,
Disability,  or  retirement  of the  Optionee.  The  Committee may determine the
circumstances under which an Optionee is deemed to have retired.

SECTION 10. ADMINISTRATION.

         (a)  Prior  to the time  that  the  securities  of the  Company  become
publicly  traded,  the Plan shall be administered by the Board (unless and until
the Board  appoints the  Committee  and the members  thereof to  administer  the
Plan), in which case the term  "Committee"  when used herein with respect to the
administration  of the  Plan  shall  be  deemed  to mean the  Board.  After  the
securities of the Company become publicly traded, the Plan shall be administered
by the Committee.  The Committee shall have the full power and authority to take
all actions and to make all  determinations  required or provided  for under the
Plan or any Option  granted or Option  Agreement  entered into hereunder and all
such other actions and  determinations  not inconsistent with the specific terms
and  provisions  of  the  Plan  deemed  by  the  Committee  to be  necessary  or


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appropriate  to the  administration  of the Plan or any Option granted or Option
Agreement  entered into hereunder.  The  interpretation  and construction by the
Committee  of any  provision  of the Plan or of any  Option  granted  or  Option
Agreement entered into hereunder shall be final and conclusive.

         (b) In the event  that the Plan,  any  Option or any  Option  Agreement
entered into hereunder  provides for any action to be taken by or  determination
to be made by the Committee,  such action may be taken or such determination may
be made by the Board.  As  permitted  by law,  the  Committee  may  delegate its
authority  under the Plan to a member of the Board of  Directors or an executive
officer of the Company.

         (c) No member of the  Committee or of the Board shall be liable for any
action or  determination  made in good  faith  with  respect  to the Plan or any
Option or Option Agreement.

SECTION 11. AMENDMENT, TERMINATION, SHAREHOLDER APPROVAL.

         (a) The Board may amend or terminate the Plan at any time,  except that
without the  approval of the  Company's  shareholders,  no  amendment  shall (i)
increase the maximum number of shares issuable,  or the maximum number of shares
for which ISOs may be granted,  under the Plan, (ii) change the class of persons
eligible to be Optionees, or (iii) change the provisions of this Section 11(a).

         (b) No Options may be granted under the Plan after July 22, 2009.

         (c) The  approval  of the Plan by  shareholders  shall be  obtained  in
accordance with the requirements of the Company's charter or by-laws, the Board,
the Company's principal stock exchange, and applicable law.

SECTION 12. ADDITIONAL PAYMENTS.

         The  Committee  may grant an Optionee  the right to receive  additional
compensation in cash or other property (in addition to any cash or stock payable
under the terms of the Option  itself)  upon the  exercise of Options,  provided
that in the  case of ISOs  such  compensation  is  includible  in  income  under
Sections 61 and 83 of the Code at the time of such exercise or vesting.

SECTION 13. DEFINITIONS.

         (a) "Act" means the  Securities  Exchange Act of 1934,  as amended from
time to time.

         (b)  "Option  Agreement"  means the  written  agreement  referred to in
Section 4(a) between the Company and the Optionee evidencing an Option.

         (c) "Board" means the Board of Directors of the Company.

         (d)  Options  "cease  to  qualify  as ISOs"  when they fail or cease to
qualify for the exclusion from income  provided in Section 421 (or any successor
provision) of the Code.

         (e) "Code" means the U.S.  Internal Revenue Code as in effect from time
to time.

         (f) "Committee" means the Committee described in Section 10 hereof.

         (g)  "Company"   means  Savvis   Communications   Corporation  and  its
successors.



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         (h)  "Disability"  means the condition of being  "disabled"  within the
meaning of Section 422(c)(6) of the Code or any successor provision.

         (i) "Eligible Participant" means a person who is eligible to receive an
Option under Section 3 of the Plan.

         (j) "Fair Market Value" means the value of a share of Stock, determined
as follows: if on the grant date or other determination date the Stock is listed
on an established national or regional stock exchange,  is admitted to quotation
on  the  NASDAQ  National  Market,  or is  publicly  traded  on  an  established
securities  market,  the Fair  Market  Value  of a share  of Stock  shall be the
closing  price of the Stock on such exchange or in such market (the highest such
closing  price if there is more than one such  exchange  or market) on the grant
date or such other  determination  date (or if there is no such reported closing
price,  the Fair  Market  Value  shall be the mean  between  the highest bid and
lowest asked prices or between the high and low sale prices on such trading day)
or, if no sale of Stock is reported for such trading day, on the next  preceding
day on which any sale  shall have been  reported.  If the Stock is not listed on
such an exchange,  quoted on such system or traded on such a market, Fair Market
Value shall be the value of the Stock as  determined  by the  Committee  in good
faith.

         (k) "Forfeiture" has the meaning given in Section 7(a).

         (l) "ISO" or  "Incentive  Stock Option" means an option to purchase one
share of Stock for a specified option price which is designated by the Committee
as an  "Incentive  Stock  Option" and which  qualifies  as an  "incentive  stock
option" under Section 422 (or any successor provision) of the Code.

         (m) "NQSO" or "Non-Qualified  Stock Option" means an option to purchase
one share of Stock for a  specified  option  price  which is  designated  by the
Committee  as a  "Non-Qualified  Stock  Option," or which is  designated  by the
Committee as an ISO but which ceases to qualify as an ISO.

         (n) "Option" means an ISO or an NQSO.

         (o) "Optionee"  means a person to whom Options are granted  pursuant to
the Plan.

         (p)  "Plan"  means The  SAVVIS  Communications  Corporation  1999 Stock
Option Plan, as amended from time to time.

         (q) "Related  Company"  means any parent or  subsidiary  of the Company
within the meaning of Section 424 of the Code, any business venture in which the
Company has a  significant  interest,  as  determined  in the  discretion of the
Committee and any subsidiary of any parent of the Company.

         (r) "Stock" means shares of the common stock of the Company,  par value
$.01 per share, or such other class or kind of shares or other securities as may
be applicable under Section 6.

         (s) "Vest" means that Options become exercisable in accordance with the
Plan and the terms of the governing Option Agreements.

         (t)  "Withholding  Taxes" means, in connection with an Option,  (i) the
total amount of Federal and state income taxes, social security taxes, and other
taxes which the Employer of the



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Optionee is required to withhold  ("Required  Withholding  Taxes") plus (ii) any
other such taxes which the Employer,  in its sole  discretion,  withholds at the
request of the Optionee.

SECTION 14. MISCELLANEOUS.

         (a) Each  provision of the Plan and Option  Agreement  relating to ISOs
shall be  construed  so that all ISOs  shall be  "incentive  stock  options"  as
defined in Section 422 of the Code or any statutory  provision  that may replace
Section 422, and any  provisions  thereof which cannot be so construed  shall be
disregarded.  Except as provided in Section 7, no discretion  granted or allowed
to the Committee  under the Plan shall apply to ISOs after their grant except to
the extent the related Option  Agreement shall so provide.  Notwithstanding  the
foregoing,   nothing  shall  prohibit  an  amendment  to  or  action   regarding
outstanding  ISOs which would cause them to cease to qualify as ISOs, so long as
the Company and the Optionee shall consent to such amendment or action.

         (b)  Nothing in the Plan or any Option  Agreement  shall  confer on any
person or  expectation  to  continue  in the employ of the  Company or a Related
Company, or shall interfere in any manner with the absolute right of the Company
or a Related Company to change or terminate such person's employment at any time
for any reason or for no reason.




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