INFORMIX CORP
S-3, 1996-01-18
PREPACKAGED SOFTWARE
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<PAGE>
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 18, 1996

                                                      REGISTRATION NO. 33-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
                              INFORMIX CORPORATION
               (Exact name if issuer as specified is its charter)

<TABLE>
<S>                     <C>
       DELAWARE                       94-3011736
      (State of            (I.R.S. Employer Identification
    Incorporation)                     Number)
</TABLE>

                              4100 BOHANNON DRIVE
                          MENLO PARK, CALIFORNIA 94025
          (Address, including zip code and telephone number, including
            area code, of Registrant's principal executive offices)

                                DAVID H. STANLEY
              VICE PRESIDENT, LEGAL, GENERAL COUNSEL AND SECRETARY
                              INFORMIX CORPORATION
                              4100 BOHANNON DRIVE
                          MENLO PARK, CALIFORNIA 94025
                                 (415) 926-6300

(Name, address, including zip code and telephone number, including area code, of
                               agent for service)
                           --------------------------

                                   COPIES TO:
                               Douglas H. Collom
                                Roger E. George
                        Wilson Sonsini Goodrich & Rosati
                            Professional Corporation
                               650 Page Mill Road
                          Palo Alto, California 94304
                                 (415) 493-9300
                           --------------------------

        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
     FROM TIME TO TIME AFTER THIS REGISTRATION STATEMENT BECOMES EFFECTIVE.
                           --------------------------

    If  the  only securities  being registered  on this  Form are  being offered
pursuant to dividend or interest reinvestment plans, please check the  following
box. / /

    If  any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to  Rule 415 under the Securities Act  of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. / /

    If  this Form  is filed  to register  additional securities  for an offering
pursuant to Rule 462(b)  under the Securities Act,  check the following box  and
list  the  Securities Act  registration  statement number  of  earlier effective
registration statement for the same offering. / /

    If this Form  is a post-effective  amendment filed pursuant  to Rule  462(c)
under  the Securities Act, check  the following box and  list the Securities Act
registration statement number  of the earlier  effective registration  statement
for the same offering. / /

    If  delivery of the prospectus is expected  to be made pursuant to Rule 434,
please check the following box. / /
                           --------------------------

                        CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
                                                                                        PROPOSED MAXIMUM
                                                                      PROPOSED MAXIMUM     AGGREGATE
              TITLE OF EACH CLASS OF                   AMOUNT TO       OFFERING PRICE       OFFERING         AMOUNT OF
           SECURITIES TO BE REGISTERED               BE REGISTERED     PER SHARE (1)       PRICE (1)      REGISTRATION FEE
<S>                                                 <C>               <C>               <C>               <C>
Common Stock $0.01 par value......................   231,900 shares        $28.50          $6,609,150          $2,280
</TABLE>

(1) Estimated solely for the purpose of computing the amount of the registration
    fee pursuant to Rule 457(c) under the Securities Act of 1933 on the basis of
    the average of the  high and low  prices at January 17,  1996 of the  Common
    Stock of the Registrant as reported on the Nasdaq Stock Market.
                           --------------------------

    THE  REGISTRANT HEREBY  AMENDS THIS REGISTRATION  STATEMENT ON  SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A  FURTHER  AMENDMENT  WHICH SPECIFICALLY  STATES  THAT  THIS  REGISTRATION
STATEMENT  SHALL THEREAFTER BECOME EFFECTIVE IN  ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT  OF 1933  OR UNTIL  THE REGISTRATION  STATEMENT SHALL  BECOME
EFFECTIVE  ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
PROSPECTUS                                SUBJECT TO COMPLETION JANUARY   , 1996
- -------------

                                 231,900 SHARES

                              INFORMIX CORPORATION

                                  COMMON STOCK
                               ($0.01 PAR VALUE)

    This  Prospectus  relates  to  the  public  offering,  which  is  not  being
underwritten,  of shares of the common stock, $0.01 par value per share ("Common
Stock"), of Informix Corporation  (together with its consolidated  subsidiaries,
"Informix")  offered from time to time by any or all of the Selling Stockholders
named herein (the "Selling Stockholders")  who received such shares in  exchange
for their shares of the capital stock of Stanford Technology Group, Inc. ("STG")
upon  the merger of STG  with and into a  wholly-owned subsidiary of Informix on
October 31, 1995.  Such shares  were issued pursuant  to an  exemption from  the
registration  requirements  of  the  Securities Act  of  1933,  as  amended (the
"Securities Act"), provided by  Section 4(2) thereof.  Informix will receive  no
part  of  the proceeds  of sales  made hereunder.  All expenses  of registration
incurred in connection with this offering  are being borne by Informix, but  all
selling  and other  expenses incurred by  Selling Stockholders will  be borne by
such  Selling  Stockholders.  None  of  the  shares  offered  pursuant  to  this
Prospectus has been registered prior to the filing of the Registration Statement
of which this Prospectus is a part.

    The Common Stock offered hereby may be offered and sold from time to time by
the  Selling Stockholders directly or through broker-dealers or underwriters who
may act solely as agents, or who may acquire the Common Stock as principals. The
distribution of the  Common Stock may  be effected in  one or more  transactions
that  may take place through the  Nasdaq National Market, including block trades
or ordinary broker's transactions, or through privately negotiated transactions,
or through underwritten public offerings, or  through a combination of any  such
methods  of sale,  at market prices  prevailing at  the time of  sale, at prices
related to such  prevailing market  prices or  at negotiated  prices. Usual  and
customary  or specially negotiated brokerage fees  or commissions may be paid by
the  Selling  Stockholders  in  connection   with  such  sales.  See  "Plan   of
Distribution."

    The Common Stock of Informix is traded in the over-the-counter market on the
Nasdaq  National Market (Nasdaq Symbol: IFMX).  On January 17, 1996, the closing
sale price of a share of Informix's Common Stock was $27.75.

    SEE "RISK FACTORS" ON PAGE 4 FOR A DISCUSSION OF CERTAIN FACTORS THAT SHOULD
BE CONSIDERED BY PROSPECTIVE PURCHASERS OF THE COMMON STOCK OFFERED HEREBY.

    Each Selling Stockholder and any  broker executing selling orders on  behalf
of  the Selling  Stockholders may  be deemed to  be an  "underwriter" within the
meaning of the Securities  Act. Commissions received by  any such broker may  be
deemed to be underwriting commissions under the Securities Act.

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

    NO   PERSON  IS  AUTHORIZED   TO  GIVE  ANY  INFORMATION   OR  TO  MAKE  ANY
REPRESENTATIONS, OTHER THAN  THOSE CONTAINED IN  THIS PROSPECTUS, IN  CONNECTION
WITH  THE OFFERING DESCRIBED HEREIN, AND, IF  GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATIONS MUST NOT BE RELIED UPON  AS HAVING BEEN AUTHORIZED BY  INFORMIX.
THIS  PROSPECTUS DOES NOT CONSTITUTE  AN OFFER TO SELL,  OR A SOLICITATION OF AN
OFFER TO BUY, NOR SHALL THERE BE ANY  SALE OF THESE SECURITIES BY ANY PERSON  IN
ANY  JURISDICTION IN WHICH  IT IS UNLAWFUL  FOR SUCH PERSON  TO MAKE SUCH OFFER,
SOLICITATION OR SALE. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE  MADE
HEREUNDER   SHALL  UNDER  ANY  CIRCUMSTANCES  CREATE  AN  IMPLICATION  THAT  THE
INFORMATION CONTAINED HEREIN IS  CORRECT AS OF ANY  TIME SUBSEQUENT TO THE  DATE
HEREOF.

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

    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE  COMMISSION OR ANY  STATE SECURITIES COMMISSION  NOR HAS THE SECURITIES
AND EXCHANGE  COMMISSION OR  ANY  STATE SECURITIES  COMMISSION PASSED  UPON  THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

               The date of this Prospectus is             , 1996.
<PAGE>
                             AVAILABLE INFORMATION

    Informix  is  subject to  the  informational reporting  requirements  of the
Securities Exchange  Act  of 1934,  as  amended  (the "Exchange  Act"),  and  in
accordance  therewith files reports, proxy statements and other information with
the Securities and Exchange Commission  (the "Commission"). Such reports,  proxy
statements  and  other information  can be  inspected and  copied at  the Public
Reference Room of the Commission, 450 Fifth Street, N.W., Washington, D.C. 20549
and at the Commission's regional offices at: Seven World Trade Center, New York,
New York  10048; and  500 West  Madison Street,  Suite 1400,  Chicago,  Illinois
60661;  and copies of  such material can  be obtained form  the Public Reference
Section  of  the  Commission,  Washington,  D.C.  20549,  at  prescribed  rates.
Information  as  of  particular  dates  concerning  directors  and  officers  of
Informix, their remuneration, options granted to them, the principal holders  of
securities   of  Informix,  and  any  material   interest  of  such  persons  in
transactions with Informix has been or will be disclosed in the proxy statements
to be distributed to stockholders of Informix and filed with the Commission.

    This Prospectus  contains  information  concerning Informix,  but  does  not
contain  all the information set forth in the Registration Statement on Form S-3
which Informix has filed with the  Securities and Exchange Commission under  the
Securities  Act  (the  "Registration  Statement").  The  Registration Statement,
including various  exhibits, may  be  inspected at  the Commission's  office  in
Washington, D.C.

                     INFORMATION INCORPORATED BY REFERENCE

    There  are hereby incorporated by reference in this Prospectus the following
documents and  information heretofore  filed with  the Securities  and  Exchange
Commission:

    (1) Informix's Annual Report on Form 10-K for the fiscal year ended December
       31, 1994.

    (2)  Informix's Quarterly Reports on Form 10-Q for the fiscal quarters ended
       April 2, July 2, and October 1, 1995.

    (3) Informix's Current  Reports on Form  8-K filed on  January 25, 1995  and
       Form 8-K/A filed on March 22, 1995.

    [(4) Informix's  Current Report  on Form  8-K to  be filed  on February    ,
         1996.]

    (5) Informix's  Registration Statement  on Form  8-A/A filed  on August  11,
       1995.

    All  documents filed  by Informix  pursuant to  Section 13(a),  13(c), 14 or
15(d) of the Exchange  Act after the  date of this Prospectus  and prior to  the
termination of the offering of securities contemplated hereby shall be deemed to
be incorporated by reference in this Prospectus or any Prospectus Supplement and
to  be a part  hereof from the date  of filing of  such documents. Any statement
contained in a document incorporated by  reference or deemed to be  incorporated
by  reference in this Prospectus or any Prospectus Supplement shall be deemed to
be modified or superseded for all purposes of this Prospectus or such Prospectus
Supplement to the extent  that a statement contained  herein, therein or in  any
subsequently  filed  document  which  also  is  incorporated  or  deemed  to  be
incorporated by reference herein  or in such  Prospectus Supplement modifies  or
supersedes  such statement. Any  such statement so  modified or superseded shall
not be deemed, except as so modified or superseded, to constitute a part of this
Prospectus or any Prospectus Supplement.

    Informix will provide without charge to each  person to whom a copy of  this
Prospectus  has been delivered, upon the written or oral request of such person,
a copy of any and all of the documents referred to above which have been or  may
be  incorporated in  this Prospectus by  reference (other than  exhibits to such
documents, unless  such  exhibits  are specifically  incorporated  by  reference
therein).  Requests  for such  copies should  be  directed to:  General Counsel,
Informix  Corporation,  4100  Bohannon  Drive,  Menlo  Park,  California  94025;
telephone number (415) 926-6300.

                                       3
<PAGE>
                                  THE COMPANY

    Informix  designs, develops, manufactures,  markets and supports distributed
relational   database   management   systems,   object-oriented,   graphical-and
character-based  application development  tools and  graphical data-access tools
for delivering information to most significant desktop platforms. In addition to
software products, Informix offers training,  consulting and maintenance to  its
customers.

    Informix  Corporation was initially  incorporated in California  in 1980 and
was reincorporated in Delaware in 1986. Informix maintains its executive offices
at 4100 Bohannon Drive, Menlo Park, California 94025 and its telephone number is
(415) 926-6300.

                          FORWARD LOOKING INFORMATION

    This Prospectus, including the information incorporated by reference herein,
contains forward-looking statements  within the  meaning of Section  27A of  the
Securities  Act and Section 21E of the Exchange Act. Actual results could differ
materially from those projected in the forward-looking statements as a result of
the risk  factors  set forth  below.  Reference is  made  in particular  to  the
discussion  set forth  under "Management's  Discussion of  Analysis of Financial
Condition and Results of Operations" in the  Annual Report on Form 10-K for  the
fiscal  year ended December 31,  1994 and in the  Quarterly Reports on Form 10-Q
for the fiscal quarters ended April 2, July 2 and October 1, 1995. In connection
with forward-looking statements which  appear in these disclosures,  prospective
purchasers  of  the  Common Stock  offered  hereby should  carefully  review the
factors set  forth  in this  Prospectus  under "Risk  Factors  --  Uncertainties
Relating  to the Merger with Illustra,"  "-- Fluctuations in Quarterly Results,"
"-- Volatility of  Informix Stock Prices,"  "-- Competition," "--  International
Operations" and "-- Management of Growth."

                                  RISK FACTORS

    In  addition to  the other  information in  this Prospectus  or incorporated
herein by reference,  the following  factors should be  considered carefully  in
evaluating  Informix and its business before purchasing the Common Stock offered
hereby:

    UNCERTAINTIES RELATING TO THE MERGER  WITH ILLUSTRA.  Informix and  Illustra
Information  Technologies, Inc. ("Illustra") have  entered into an Agreement and
Plan of Reorganization dated  as of December 20,  1995 (the "Merger  Agreement")
pursuant  to which  Illustra will  be merged  into a  wholly-owned subsidiary of
Informix ("Merger"). Illustra develops,  produces, markets and supports  object-
relational  database systems  and software  tools and  also provides consulting,
training and maintenance services.  As a result of  the Merger, all  outstanding
shares  of Illustra Common Stock and Illustra Preferred Stock will become shares
of Informix Common  Stock and all  outstanding options and  warrants to  acquire
Illustra  Common  Stock  or Illustra  Preferred  Stock will  become  options and
warrants to  acquire Informix  Common Stock.  The maximum  number of  shares  of
Informix  Common  Stock to  be  issued (including  Informix  Common Stock  to be
reserved for issuance upon exercise of any of Illustra's options and warrants to
be assumed by Informix) in the Merger in exchange for the outstanding shares  of
Illustra  Common  Stock  and  Illustra Preferred  Stock  and  all  unexpired and
unexercised options and warrants  to acquire Illustra  Common Stock or  Illustra
Preferred  Stock  will be  15,000,000.  The Merger  is  subject to  a  number of
conditions, including  approval  by  the  Illustra  stockholders.  Assuming  all
conditions  to  the Merger  are met  or  waived prior  thereto, it  is currently
anticipated that the effective time of the  Merger will be on or about  February
29, 1996. The following are risks associated with the Merger:

        UNCERTAINTIES  RELATING  TO  INTEGRATION OF  OPERATIONS.    Informix and
    Illustra have entered into  the Merger Agreement  with the expectation  that
    the  Merger will result in beneficial  synergies for the combined companies.
    Achieving the anticipated benefits  of the Merger will  depend in part  upon
    whether  the integration of the two  companies' businesses is achieved in an
    efficient and effective manner, and there can be no assurance that this will
    occur. The  combination  of the  two  companies will  require,  among  other
    things, integration of Illustra's object-relational database

                                       4
<PAGE>
    technology with Informix's relational database technology and integration of
    their  respective sales and marketing  and research and development efforts.
    There can be no assurance that integration will be accomplished smoothly, on
    time or successfully. The difficulties of such integration may be  increased
    by  the complexity of the technologies being integrated and the necessity of
    coordinating geographically  separated  organizations.  The  integration  of
    certain  operations  following the  Merger  will require  the  dedication of
    management resources  which  may  temporarily distract  attention  from  the
    day-to-day  business  of  the  combined  companies.  Failure  to effectively
    accomplish the integration of  the two companies'  operations could have  an
    adverse effect on Informix's results of operations and financial condition.

        POTENTIAL  DILUTIVE  EFFECT  TO STOCKHOLDERS.    Although  the companies
    believe that beneficial synergies will result from the Merger, there can  be
    no  assurance that the  combining of the two  companies' businesses, even if
    achieved in  an  efficient, effective  and  timely manner,  will  result  in
    combined  results  of operations  and financial  condition superior  to what
    would have been achieved by each company independently, or as to the  period
    of  time required  to achieve such  result. The issuance  of Informix Common
    Stock in  connection  with the  Merger  will  have the  effect  of  reducing
    Informix's  net  income  per share  and  could  reduce the  market  price of
    Informix Common Stock unless  and until revenue growth  or cost savings  and
    other  business synergies sufficient  to offset the  effect of such issuance
    can be  achieved. There  can be  no assurance  that such  synergies will  be
    achieved.

        NEED FOR ACCEPTANCE OF OBJECT-RELATIONAL TECHNOLOGY.  The market for the
    object-relational database products of Illustra is new and evolving, and its
    growth  depends both  upon the  growing need to  store complex  data and the
    broader market acceptance of Illustra's object-relational technology as  the
    solution  for this  need. Because object-relational  technology represents a
    shift in programming  methodology, it requires  a substantial investment  in
    the  retraining  of  programmers,  which can  be  expensive  and  reduce the
    productivity of programmers during the  training period. As a result,  there
    can  be no assurance  that organizations will choose  to make the transition
    from   conventional    relational    database    management    systems    to
    object-relational  database management  systems, and  the time  frame within
    which such transition may occur, even if they believe that they can  benefit
    from  the  advantages  of  an object-relational  system.  Any  delay  in the
    market's acceptance of  object-relational database  management systems  will
    reduce  the anticipated  benefits of  the Merger  and could  have an adverse
    effect on Informix's results of operations and financial condition.

        COSTS OF  INTEGRATION; TRANSACTION  EXPENSES.   The combined  companies'
    results of operations will be adversely affected by Merger-related expenses,
    consisting  of  transaction costs  for  investment bankers  fees, attorneys,
    accountants, financial printing  and other related  charges estimated to  be
    approximately  $5 million dollars. These  nonrecurring costs will be charged
    to operations in the fiscal quarter in which the Merger is consummated. This
    estimate is preliminary and is therefore subject to change.

    FLUCTUATIONS IN QUARTERLY  RESULTS.  Informix's  operating results can  vary
substantially from period to period. The timing and amount of Informix's license
revenues  are subject to a  number of factors that  make estimation of operating
results prior to the end of a quarter extremely uncertain. Informix has operated
historically with little or no backlog, and as a result, license revenues in any
quarter are dependent on contracts entered into or orders booked and shipped  in
that  quarter. Informix's quarterly operating  margins have generally followed a
historic pattern,  with second  half revenues  and operating  margins  generally
being higher than those of the preceding first half. Informix believes that this
pattern  has been primarily related to customers' capital spending cycles at the
end of a calendar year as well  as to Informix's selling efforts, influenced  by
annual  sales incentive plans, at the end of the calendar year, which is the end
of Informix's  fiscal  year. Additionally,  as  is  common in  the  industry,  a
disproportionate   amount  of   Informix's  license  revenue   is  derived  from
transactions that  close in  the last  few weeks  of a  quarter. The  timing  of
closing   of   large   license   agreements   also   increases   the   risk   of
quarter-to-quarter fluctuations  and  the uncertainty  of  estimating  quarterly

                                       5
<PAGE>
operating  results. Informix's operating expenses  are based on projected annual
and quarterly revenue levels, have been increasing at rates approaching the rate
of total revenue growth and  are incurred approximately ratably throughout  each
quarter.  As a result,  if projected revenues  are not realized  in the expected
period, Informix's operating results for that period would be adversely affected
as the operating  expenses are relatively  fixed in the  short term. Failure  to
achieve   revenue,  earnings  and  other  operating  and  financial  results  as
forecasted or anticipated by brokerage firm analysts or industry analysts  could
result  in an  immediate and  adverse effect on  the market  price of Informix's
Common Stock. Further, Informix may not learn of, or be able to confirm, revenue
or earning shortfalls until the  end of each quarter,  which could result in  an
even more immediate and adverse effect on the trading price of Informix's Common
Stock.

    VOLATILITY OF INFORMIX STOCK PRICES.  The market for Informix's Common Stock
is  highly  volatile. The  trading  price of  Informix's  Common Stock  could be
subject to wide fluctuations  in response to  quarterly variations in  operating
and  financial  results,  announcements  of  technological  innovations  or  new
products by Informix or its competitors, changes in prices of Informix's or  its
competitors'   products  and  services,  changes  in  product  mix,  changes  in
Informix's revenue  and revenue  growth rates  for Informix  as a  whole or  for
individual  geographic areas, business units, products or product categories, as
well as other events or factors. Statements or changes in opinions, ratings,  or
earnings  estimates made by brokerage firms or industry analysts relating to the
market in which Informix does business or relating to Informix specifically have
resulted, and could in the future result, in an immediate and adverse effect  on
the market price of Informix's Common Stock. Statements by financial or industry
analysts regarding the extent of the dilution in Informix's net income per share
resulting from the Merger and the extent to which such analysts expect potential
business  synergies to  offset such  dilution can  be expected  to contribute to
volatility in the market price of Informix Common Stock. In addition, the  stock
market  has from time to time  experienced extreme price and volume fluctuations
which have particularly  affected the market  price for the  securities of  many
high-technology  companies and which often have  been unrelated to the operating
performance of these  companies. These broad  market fluctuations may  adversely
affect the market price of Informix Common Stock.

    COMPETITION.   The market  for Informix's software  products and services is
extremely competitive.  The chief  competition faced  by Informix  is  currently
provided  by  Oracle  Corporation,  Sybase, Inc.,  CA  Ingres  (a  subsidiary of
Computer Associates International, Inc.), IBM Corporation, Microsoft Corporation
and Red  Brick  Systems  and  suppliers  of third  party  tools  such  as  Gupta
Corporation,  Forte  Software,  Inc.  and  Dynasty  Technologies,  Inc.  Some of
Informix's current  competitors  and  many potential  competitors  have  greater
financial,  technical and marketing resources than  Informix. To the extent that
market acceptance for personal computer  oriented technologies increases at  the
expense  of UNIX or other  non-PC platforms, this could  result in greater price
pressure  on  certain  of  Informix's   database  products  and  services.   The
availability  and  market  acceptance  of  Microsoft  Corporation's  Windows  NT
operating system may increase the  competition faced by the principal  operating
system  platforms on which Informix's products operate and may result in greater
price pressure on certain  of Informix's database  products and services.  Also,
new or enhanced products introduced by existing or future competitors could have
an  adverse effect on  Informix's business, results  of operations and financial
condition. Existing and future competition  or changes in Informix's product  or
services  pricing structure or  product or service offerings  could result in an
immediate reduction in the  prices of Informix's products  or services. If  this
were  to result  in significant  price declines, the  effects of  which were not
offset by any  resulting increases  in sales  volume of  Informix's products  or
services,  Informix's business,  results of  operations and  financial condition
would be  adversely affected.  There  can be  no  assurance that  Informix  will
continue  to compete successfully with its  existing competitors or will be able
to compete successfully with new competitors.

    TECHNOLOGICAL CHANGE AND NEW PRODUCTS.   The market for Informix's  products
and  services is characterized  by rapidly changing  technology and frequent new
product introductions.  Informix's  success  will depend  upon  its  ability  to
enhance   its   existing   products   and   to   introduce   new   products   on

                                       6
<PAGE>
a timely and cost-effective basis that meet dynamic customer requirements. There
can be no assurance that Informix will be successful in developing new  products
or  enhancing its existing products  or that such new  or enhanced products will
receive market acceptance  or be timely  delivered to the  market. Informix  has
experienced product delays in the past and may have delays in the future. Delays
in  the scheduled availability or a lack of market acceptance of its products or
failure to accurately  anticipate customer demand  or meet customer  performance
requirements  could  have  a  material adverse  effect  on  Informix's business,
results of operations and financial condition. In addition, products as  complex
as  those offered by Informix  may contain undetected errors  or bugs when first
introduced or as  new versions  are released. There  can be  no assurance  that,
despite  testing, new  products or  new versions  of existing  products will not
contain undetected errors or bugs that will delay the introduction or commercial
acceptance of such products. Informix's success  also depends on the ability  of
its  products  to  interoperate  and  perform  well  with  existing  and future,
industry-standard leading application software products  intended to be used  in
connection with relational database management systems. Failure to meet existing
and  future interoperability and performance requirements of certain independent
vendors marketing such applications  in a timely  manner could adversely  affect
the market for Informix's products. Commercial acceptance of Informix's products
and services could also be adversely affected by critical or negative statements
or  reports by  brokerage firms,  industry and  financial analysts  and industry
periodicals concerning Informix, its products, business or competitors or by the
advertising or marketing  efforts of  competitors, or other  factors that  could
affect consumer perception.

    INTERNATIONAL  OPERATIONS.  Over half of Informix's net revenues are derived
from its international operations.  Informix's operations and financial  results
could  be  significantly  affected  by  factors  associated  with  international
operations such as changes in foreign currency exchange rates and  uncertainties
relative  to  regional  economic  circumstances,  as  well  as  by  other  risks
associated with  international  activities.  Most  of  Informix's  international
revenue  and  expenses are  denominated in  local currencies.  Although Informix
takes into account changes in exchange rates over time in its pricing  strategy,
Informix's  business,  results of  operations and  financial condition  could be
materially and adversely affected by  fluctuations in foreign currency  exchange
rates.  There can be no assurance that Informix will not experience fluctuations
in international revenues.

    INTEGRATION OF ACQUIRED COMPANIES.  Informix has recently completed  several
acquisitions  including the database division of ASCII Corporation in Japan, STG
in the United States  and distributors in Germany,  Korea and Malaysia, and  has
recently  entered into  the Merger Agreement  to acquire  Illustra. Informix may
acquire other distributors, companies, products  or technologies in the  future.
There  can  be  no assurance  that  these  acquisitions and  the  acquisition of
Illustra can be effectively integrated,  that such acquisitions will not  result
in  costs  or  liabilities that  could  adversely effect  Informix's  results of
operations and financial condition, or that Informix will obtain the anticipated
or desired benefits of such acquisitions.

    KEY PERSONNEL.    Informix's  success  depends  in  part  on  the  continued
contributions  of both  companies' key  management and  technical personnel. The
success of Informix  also depends on  Informix's ability to  attract and  retain
other  qualified  technical,  managerial,  sales  and  marketing  personnel. The
competition for such personnel is intense in the software industry.  Uncertainty
during  integration of  the businesses  of Informix  and Illustra  may adversely
affect the combined companies' ability to attract and retain such personnel.

    MANAGEMENT OF  GROWTH.   Informix  has experienced  rapid growth  in  recent
years.  There can  be no  assurance Informix  will maintain  its recent  rate of
growth. Informix's  future growth  will depend  in part  on the  ability of  its
officers   and  key  personnel   to  manage  growth   successfully  through  the
implementation of  appropriate  management  systems  and  controls.  Failure  to
effectively  implement  or maintain  such systems  and controls  could adversely
affect Informix's business, results of operations and financial condition.

                                       7
<PAGE>
    LIMITATIONS ON PROTECTION OF  INTELLECTUAL PROPERTY AND PROPRIETARY  RIGHTS.
Informix  relies on a combination of  trade secret, copyright and trademark laws
and contractual provisions  to protect  its proprietary rights  in its  software
products.  There can be no assurance that  these protections will be adequate or
that  competitors  will   not  independently  develop   technologies  that   are
substantially  equivalent  or superior  to  Informix's technology.  In addition,
copyright and trade secret protection for Informix's products may be unavailable
or unreliable in certain foreign countries. As of the date hereof, Informix  had
no  issued  patents. As  the number  of  software products  in the  industry and
software patents  increases,  Informix  believes that  software  developers  may
become  increasingly subject to  infringement claims. There  can be no assurance
that a third party will not assert that its patents or other proprietary  rights
are  violated by products offered by Informix.  Any such claims, with or without
merit, can be time consuming and expensive to defend, and could have an  adverse
effect  on Informix's business,  results of operations  and financial condition.
Infringement of valid  third party patents  and propriety rights  could have  an
adverse  effect  on Informix's  business,  results of  operations  and financial
condition. Informix  also relies  on "shrink-wrap"  break-the-seal licenses  not
signed by the licensee to protect its proprietary rights. "Shrink-wrap" licenses
may be unenforceable under the laws of certain jurisdictions.

    DEPENDENCE ON THIRD-PARTY PROVIDERS OF TECHNOLOGY.  The products of Informix
use   certain  products  and  technologies   of  various  third  party  software
developers, including both complete products offered as extensions of Informix's
product lines and  technology used  in the enhancement  of internally  developed
products.  Such  products and  technologies are  obtained  from the  third party
providers under  contractual license  agreements, which  in some  cases are  for
limited  time  periods and  in  some cases  provide  that such  licenses  may be
terminated under certain circumstances. There can be no assurance that  Informix
will  be able to  maintain adequate relations  with these third-party providers,
that these third-party providers will  commit adequate development resources  to
maintain these products and technologies or that the license agreements that are
for   limited  time   periods  will  be   renewed  upon   termination.  In  such
circumstances, Informix's inability to  obtain or develop substitute  technology
could  adversely affect Informix's business, results of operations and financial
condition.

    EFFECT OF ANTITAKEOVER  PROVISIONS OF  DELAWARE LAW  AND INFORMIX'S  CHARTER
DOCUMENTS.  Informix is subject to the provisions of Section 203 of the Delaware
General  Corporation Law, which has the effect of restricting changes in control
of a company. The Board of Directors of Informix is divided into three  classes,
with  each  class standing  for election  once every  three years.  In addition,
Informix's Board of Directors has authority  to issue up to 5,000,000 shares  of
preferred stock and to fix the rights, preferences, privileges and restrictions,
including  voting rights, of such  shares without any further  vote or action by
the stockholders. Informix  also has  a Preferred Shares  Rights Agreement  that
provides  for the issuance of rights which upon the occurrence of certain events
would result in significant dilution to  Informix Common Stock held by a  bidder
for Informix. These and other provisions of the Delaware General Corporation Law
applicable  to Informix and Informix's charter  documents may have the effect of
delaying, deterring or preventing changes in control or management of Informix.

                                       8
<PAGE>
                              SELLING STOCKHOLDERS

    The following  table  shows,  as  to  each  Selling  Stockholder,  (i)  such
stockholder's  name  and  position  with  Informix  (including  its wholly-owned
subsidiary, STG), (ii) the number of  shares of Common Stock beneficially  owned
prior to the offering, and (iii) the number of shares of Common Stock to be sold
pursuant to this Prospectus:

<TABLE>
<CAPTION>
                                                                         SHARES
                                                                      BENEFICIALLY       SHARES TO BE
                                                                     OWNED PRIOR TO          SOLD
NAME                                                                 OFFERING (1)(2)   IN THE OFFERING
- ------------------------------------------------------------------  -----------------  ----------------
<S>                                                                 <C>                <C>
Jonathan Kraft Charitable Trust of 1996...........................          37,310(3)          37,310
David Lichtblau ..................................................         112,310(4)          28,000
 Vice President, Marketing
 Stanford Technology Group, Inc.
DPL I Charitable Trust............................................          56,000(5)          56,000
Sequoia Capital VI................................................          62,544(6)          62,544
Sequoia Technology Partners VI....................................           3,924(6)           3,924
Sequoia XXIV......................................................           3,140(6)           3,140
Kirill Sheynkman .................................................         112,310             32,110
 President, Stanford Technology Group, Inc.
Douglas M. Leone..................................................           2,218(7)           2,218
J. Thomas McMurray................................................           2,218(7)           2,218
Michael Moritz....................................................           2,218(7)           2,218
Thomas F. Stephenson..............................................           2,218(7)           2,218
</TABLE>

- ------------------------
(1) Based on shares beneficially owned at January 17, 1996.

(2) No  Selling Stockholder will own  more than 1% of  the outstanding shares of
    Common Stock of Informix following the sale of the shares offered hereby.

(3) Excludes an  additional 75,000  shares  of Common  Stock owned  by  Jonathan
    Kraft,  the trustee of the  Jonathan Kraft Charitable Trust  of 1996 and the
    Vice President, Professional Services of Stanford Technology Group, Inc.

(4) Includes 56,000 shares of Common Stock  held by the DPL I Charitable  Trust,
    of which David Lichtblau is trustee.

(5) Excludes  56,310 shares of Common Stock held  by David Lichtblau, who is the
    trustee of the DPL I Charitable Trust.

(6) Excludes an aggregate  of 8,872  shares of  Common Stock  held severally  by
    Douglas  M.  Leone,  J.  Thomas  McMurray,  Michael  Moritz  and  Thomas  F.
    Stephenson, who  are  principals  of  Sequoia  Capital  and  its  affiliated
    entities.

(7) Excludes  an  aggregate of  69,608 shares  of Common  Stock held  by Sequoia
    Capital VI, Sequoia Technolgy  Partners VI and Sequoia  XXIV, as to each  of
    which Messrs. Leone, McMurray, Moritz and Stephenson are principals.

                              PLAN OF DISTRIBUTION

    Informix  has been  advised by  the Selling  Stockholders that  they and any
person receiving shares from the Selling Stockholders in the form of a bona fide
gift or distribution to a limited  partner of a Selling Stockholder (a  "Donee")
intend  to sell all or a portion of  the shares offered hereby from time to time
in the over-the-counter market and that sales will be made at prices  prevailing
at the times of

                                       9
<PAGE>
such  sales. The Selling Stockholders and any  Donee may also make private sales
directly or through a broker or brokers,  who may act as agent or as  principal.
In  connection  with any  sales,  the Selling  Stockholders,  any Donee  and any
brokers participating in such sales may be deemed to be underwriters within  the
meaning  of the Securities Act. Informix will receive no part of the proceeds of
sales made hereunder.

    Any broker-dealer participating  in such transactions  as agent may  receive
commissions  from the Selling  Stockholders and any  Donee (and, if  they act as
agent for  the  purchaser  of  such shares,  from  such  purchaser).  Usual  and
customary brokerage fees will be paid by the Selling Stockholders and any Donee.
Broker-dealers  may  agree with  the Selling  Stockholders  to sell  a specified
number of shares  at a stipulated  price per share,  and, to the  extent such  a
broker-dealer  is unable to do  so acting as agent  for the Selling Stockholders
and any Donee, to purchase as principal any unsold shares at the price  required
to  fulfill the  broker-dealer commitment  to the  Selling Stockholders  and any
Donee. Broker-dealers who acquire shares as principal may thereafter resell such
shares from time to  time in transactions (which  may involve crosses and  block
transactions  and which may  involve sales to  and through other broker-dealers,
including transactions of  the nature described  above) in the  over-the-counter
market,  in negotiated transactions or otherwise  at market prices prevailing at
the time of sale or  at negotiated prices, and  in connection with such  resales
may pay to or receive from the purchasers of such shares commissions computed as
described above.

    Informix  has advised  the Selling  Stockholders that  the anti-manipulative
Rules 10b-6 and 10b-7  under the Exchange  Act may apply to  their sales in  the
market,  has furnished each Selling  Stockholder with a copy  of these Rules and
has informed them of  the need for  delivery of copies  of this Prospectus.  The
Selling   Stockholders  or  any  Donee  may  indemnify  any  broker-dealer  that
participates in transactions involving  the sale of  the shares against  certain
liabilities,  including  liabilities  arising  under  the  Securities  Act.  Any
commissions  paid  or  any  discounts   or  concessions  allowed  to  any   such
broker-dealers,  and any profits received  on the resale of  such shares, may be
deemed to be underwriting discounts and commissions under the Securities Act  if
any such broker-dealers purchase shares as principal.

    Upon notification by a Selling Stockholder or any Donee to Informix that any
material  arrangement has been entered into with a broker-dealer for the sale of
shares through a cross  or block trade, to  the extent required, a  supplemental
prospectus  will be  filed under  Rule 424(c)  under the  Securities Act setting
forth the  name of  the  participating broker-dealer(s),  the number  of  shares
involved, the price at which such shares were sold by the Selling Stockholder or
any  Donee,  the commissions  paid or  discounts or  concessions allowed  by the
Selling Stockholder or any Donee to such broker-dealer(s), and where applicable,
that such  broker-dealer(s) did  not  conduct any  investigation to  verify  the
information set forth in this Prospectus.

    Any securities covered by this Prospectus which qualify for sale pursuant to
Rule  144  under the  Securities Act  may be  sold under  that Rule  rather than
pursuant to this Prospectus.

    There can be no assurance that any of the Selling Stockholders or any  Donee
will sell any or all of the shares of Common Stock offered by them hereunder.

                                 LEGAL MATTERS

    The  validity of the shares  of Common Stock offered  hereby has been passed
upon  for  the  Company  by  Wilson  Sonsini  Goodrich  &  Rosati,  Professional
Corporation, Palo Alto, California.

                                       10
<PAGE>
                              INFORMIX CORPORATION
                       REGISTRATION STATEMENT ON FORM S-3
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM NUMBER

ITEM 14  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.*

<TABLE>
<S>                                                                 <C>
SEC Registration Fee..............................................  $   2,280
Accounting Fees**.................................................  $   5,000
Legal Fees**......................................................  $  10,000
Printing Fees**...................................................  $  10,000
Miscellaneous**...................................................  $     720
                                                                    ---------
    Total.........................................................  $  28,000
                                                                    ---------
                                                                    ---------
</TABLE>

- ------------------------
 * All  expenses  of  issuance  and  distribution  (other  than  commissions and
   discounts payable to dealers or underwriters) will be paid by the Company.

** Estimates

ITEM 15  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

    Section 145 of the  Delaware General Corporation Law  authorizes a court  to
award,  or  a  corporation's Board  of  Directors to  grant,  indemnification to
directors  and   officers   in  terms   sufficiently   broad  to   permit   such
indemnification   under   certain  circumstances   for   liabilities  (including
reimbursement for expenses incurred) arising  under the Securities Act.  Article
Eight  of the  Registrant's Certificate of  Incorporation and Article  VI of the
Registrant's Bylaws  provide for  indemnification  of its  directors,  officers,
employees  and  other agents  to the  maximum extent  permitted by  the Delaware
General  Corporation  Law.  In  addition,   the  Registrant  has  entered   into
indemnification agreements with its officers and directors.

ITEM 16  EXHIBITS.

<TABLE>
<CAPTION>
  EXHIBIT
  NUMBER
- -----------
<S>          <C>
       4.1   Registration  Rights Agreement  dated as  of October 25,  1995 among  Informix Corporation and
              certain shareholders of Stanford Technology Group, Inc.
      4.2*   Amended and Restated Preferred Share Rights Agreement of Informix Corporation
       5.1   Opinion of Wilson Sonsini Goodrich & Rosati
      23.1   Consent of Ernst & Young LLP, Independent Auditors
      23.2   Consent of Wilson Sonsini Goodrich & Rosati (Included in Exhibit 5.1)
        24   Power of Attorney (See page II-3)
</TABLE>

- ------------------------
* Incorporated by reference to exhibits to the Form 8-A/A Registration Statement
  filed on August 11, 1995.

ITEM 17  UNDERTAKINGS.

    The  undersigned  registrant  hereby   undertakes  that,  for  purposes   of
determining  any  liability  under  the  Securities  Act,  each  filing  of  the
registrant's annual report  pursuant to Section  13(a) or Section  15(d) of  the
Exchange  Act that is  incorporated by reference  in this 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.

                                      II-1
<PAGE>
    Insofar as indemnification for liabilities arising under the Securities  Act
of  1933 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 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.

                                      II-2
<PAGE>
                                   SIGNATURES

    Pursuant  to the requirements of the Securities Act of 1933, as amended, the
Registrant has  duly caused  this Registration  Statement to  be signed  on  its
behalf by the undersigned, thereunto duly authorized, in the City of Menlo Park,
State of California, on the 17th day of January 1996.

                                         INFORMIX CORPORATION
                                         By:         /s/ PHILLIP E. WHITE

                                         ---------------------------------------
                                                      Phillip E. White
                                             PRESIDENT, CHIEF EXECUTIVE OFFICER
                                                           AND
                                                  CHAIRMAN OF THE BOARD

                               POWER OF ATTORNEY

    KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below  hereby constitutes and appoints, jointly and severally, David H. Stanley,
Howard H. Graham and Richard C. Blass, and each of them acting individually,  as
his  attorney-in-fact, each with full power of  substitution, for him in any and
all capacities, to sign any and  all amendments to this Registration  Statement,
and  to file the same,  with exhibits thereto and  other documents in connection
therewith, with the  Securities and  Exchange Commission,  hereby ratifying  and
confirming  our signatures as they may be signed by our said attorney to any and
all amendments to said Registration Statement.

    Pursuant to the requirements of the Securities Act of 1933, as amended, this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated:

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

<C>                                     <S>                                       <C>
          /s/ PHILLIP E. WHITE          President, Chief Executive Officer and
- ----------------------------------------
                                          Chairman of the Board (Principal        January 17, 1996
            Phillip E. White              Executive Officer)

          /s/ HOWARD H. GRAHAM          Vice President, Finance and Chief
- ----------------------------------------
                                          Financial Officer (Principal Financial  January 17, 1996
            Howard H. Graham              Officer)

          /s/ RICHARD C. BLASS          Vice President, Corporate Controller and
- ----------------------------------------
                                          Chief Accounting Officer (Principal     January 17, 1996
            Richard C. Blass              Accounting Officer)

        /s/ ALBERT F. KNORP, JR.
- ----------------------------------------
                                        Director                                  January 17, 1996
          Albert F. Knorp, Jr.

           /s/ JAMES L. KOCH
- ----------------------------------------
                                        Director                                  January 17, 1996
             James L. Koch

        /s/ THOMAS A. MCDONNELL
- ----------------------------------------
                                        Director                                  January 17, 1996
          Thomas A. McDonnell

         /s/ CYRIL J. YANSOUNI
- ----------------------------------------
                                        Director                                  January 17, 1996
           Cyril J. Yansouni
</TABLE>

                                      II-3

<PAGE>
                                                                     EXHIBIT 4.1

                              INFORMIX CORPORATION

                         REGISTRATION RIGHTS AGREEMENT

    This  Registration Rights Agreement  (this "Agreement") is  made and entered
into as  of October  25, 1995  by  and among  Informix Corporation,  a  Delaware
corporation  (the "Company"),  and each of  the holders of  the Company's Common
Stock, $.01  par value  per share  ("Company Common  Stock"), set  forth in  the
Schedule  of Stockholders attached as Exhibit  A hereto (each, a "Stockholder").
Each of the Stockholders  has received Company Common  Stock in connection  with
the  merger  of Stanford  Technology  Group, Inc.  ("STG")  with a  wholly owned
subsidiary of the Company  pursuant to an Agreement  and Plan of  Reorganization
dated as of October 25, 1995 (the "Reorganization Agreement").

    That parties hereto, intending legally to be bound, hereby agree as follows:

    1.   DEFINITIONS.  As used in this agreement, the following terms shall have
the meanings ascribed to them below:

        (a) "BUSINESS DAY"  means any  Monday, Tuesday,  Wednesday, Thursday  or
    Friday  that  is  not  a  day on  which  national  banking  institutions are
    authorized by law, regulation or executive order to close.

        (b) "PROSPECTUS"  means  the  prospectus included  in  the  Registration
    Statement,  as amended  or supplemented  by any  prospectus supplements with
    respect to  the terms  of the  offering of  any portion  of the  Registrable
    Securities  covered by the  Registration Statement, by  any other amendments
    and prospectus supplements (including post-effective amendments), and by any
    material incorporated by reference therein.

        (c) "REGISTRABLE  SECURITIES" means  (i) the  shares of  Company  Common
    Stock  received by  the Stockholders in  the amount  and as of  the date set
    forth in the  Schedule of  Stockholders and  (ii) any  securities issued  or
    issuable  in respect  of or  in exchange  for any  of the  shares of Company
    Common Stock referred to in clause (i)  above by way of a stock dividend  or
    stock  split or in connection with a combination of shares of Company Common
    Stock,  recapitalization,   reclassification,  merger,   consolidation,   or
    exchange  offer.  For purposes  of  this Agreement,  a  Registrable Security
    ceases to  constitute  a  Registrable Security  (i)  when  such  Registrable
    Security shall have been effectively registered under the Securities Act and
    disposed   of  pursuant  to  the   Registration  Statement  (ii)  when  such
    Registrable Security  shall have  been sold  pursuant to  Rule 144  (or  any
    successor  provision) under the Securities  Act, (iii) when such Registrable
    Security shall have  been otherwise  transferred and a  new certificate  for
    such  Registrable Security not bearing a legend restricting further transfer
    shall have been delivered by the Company, (iv) on the second anniversary  of
    the  date of original  issuance, (v) with  respect to a  Stockholder, on the
    date on which  all of  such Stockholder's  remaining Registrable  Securities
    could  be sold in a single transaction in compliance with Rule 144 under the
    Securities Act, or (vi) when such Registrable Security shall have ceased  to
    be outstanding.

        (d)  "REGISTRATION  STATEMENT"  shall mean  the  applicable registration
    statement filed by the Company to effect the registration, qualification  or
    compliance contemplated herein.

        (e) "SECURITIES ACT" shall mean the Securities Act of 1933, as amended.

    2.  REQUESTED REGISTRATION.

        (a)   REQUEST FOR REGISTRATION.  Subject to the terms of this Agreement,
    if at any time  after January 1,  1996, the Company  shall receive from  any
    Stockholder or group of Stockholders a

                                       1
<PAGE>
    written  request that the Company  effect any registration, qualification or
    compliance with respect to all or a part of the Registrable Securities,  the
    anticipated  gross  offering price  of  which would  exceed  $2,000,000, the
    Company will:

           (i) promptly  give  written  notice  of  the  proposed  registration,
       qualification or compliance to all other Stockholders; and

           (ii)  as  soon as  practicable, use  its  reasonable best  efforts to
       effect within 60 days of the  receipt of such request such  registration,
       qualification or compliance (including, without limitation, the execution
       of   an  undertaking  to   file  post-effective  amendments,  appropriate
       qualification under applicable  blue sky or  other state securities  laws
       and  appropriate compliance with applicable  regulations issued under the
       Securities Act and any other governmental requirements or regulations) as
       may be  so requested  and as  would  permit or  facilitate the  sale  and
       distribution of all or such portion of such Registrable Securities as are
       specified  in  such request,  together with  all or  such portion  of the
       Registrable Securities of any Stockholder or Stockholders joining in such
       request as are  specified in a  written request received  by the  Company
       within 15 days after receipt of such written notice from the Company;

    PROVIDED,  HOWEVER,  that the  Company shall  not be  obligated to  take any
    action to effect any such registration, qualification or compliance pursuant
    to this Section:

           (A) in  any particular  jurisdiction in  which the  Company would  be
       required  to execute a general consent to service of process in effecting
       such registration,  qualification or  compliance  unless the  Company  is
       already  subject to  service in  such jurisdiction  and except  as may be
       required by the Securities Act;

           (B) prior to 90 days immediately following the effective date of  any
       registration  statement pertaining  to securities  of the  Company (other
       than a  registration of  securities in  a Rule  145 transaction  or  with
       respect to an employee benefit plan);

           (C) more than once in any six-month period;

           (D)  after  the Company  has  effected three  (3)  such registrations
       pursuant to  this  Section,  such registrations  have  been  declared  or
       ordered   effective  and   the  securities   offered  pursuant   to  such
       registrations have been sold; or

           (E) prior to the publication  of financial results covering at  least
       thirty  (30) days of the combined operations of the Company and STG after
       the  merger  contemplated  by  the  Reorganization  Agreement  has   been
       completed, and such publication is in accordance with the requirements of
       Accounting  Series  Release  No.  130  of  the  Securities  and  Exchange
       Commission.

        Subject to the foregoing clauses, the Company shall file a  Registration
    Statement  covering the Registrable Securities so requested to be registered
    as soon  as practicable  after receipt  of the  request or  requests of  any
    Stockholder  or Stockholders. If, however, the  Company shall furnish to the
    Stockholder or Stockholders requesting a Registration Statement pursuant  to
    this  Section  a  certificate signed  by  the President  or  Chief Financial
    Officer of  the Company  stating that  in the  good faith  judgment of  such
    officer,  it would  be detrimental to  the Company and  its stockholders for
    such Registration Statement  to be filed  and it is  therefore essential  to
    defer  the filing of such Registration Statement, the Company shall have the
    right to defer  such filing  for a  period of not  more than  60 days  after
    receipt  of the request  of the Stockholder  or Stockholders requesting such
    registration.

        (b)   UNDERWRITING.    If  the Stockholders  intend  to  distribute  the
    Registrable Securities covered by their request by means of an underwriting,
    they  shall so advise the Company as a part of their request and the Company
    shall  include  such  information  in  its  written  notice  to  the   other
    Stockholders.  The right of any Stockholder to registration pursuant to this
    Section shall be conditioned upon  such Stockholder's participation in  such
    underwriting and the inclusion of such

                                       2
<PAGE>
    Stockholder's  Registrable  Securities  in the  underwriting  to  the extent
    provided herein. Notwithstanding any other provision of this Section, if the
    managing underwriter  advises the  Stockholders  in writing  that  marketing
    factors  require a  limitation of the  number of shares  to be underwritten,
    then, subject to the provisions of Section 2(a), the Company shall so advise
    all Stockholders and the number of shares of Registrable Securities that may
    be included in the  registration and underwriting  shall be allocated  among
    all  Stockholders requesting inclusion in the registration in proportion, as
    nearly as practicable, to the  respective amounts of Registrable  Securities
    originally requested by such Stockholders to be included in the Registration
    Statement.  No  Registrable  Securities excluded  from  the  underwriting by
    reason of the managing underwriter's marketing limitation shall be  included
    in such registration.

        If  any Stockholder disapproves  of the terms  of the underwriting, such
    person may elect to withdraw therefrom by written notice to the Company, the
    managing underwriter and the other Stockholders. The Registrable  Securities
    and/or   other  securities  so  withdrawn   shall  also  be  withdrawn  from
    registration;  provided,  however,  that  if  by  the  withdrawal  of   such
    Registrable  Securities a greater  number of Registrable  Securities held by
    other Stockholders may be included in  such registration (up to the  maximum
    of any limitation imposed by the underwriters), then the Company shall offer
    to  all  Stockholders  who  have  included  Registrable  Securities  in  the
    registration the right to include  additional Registrable Securities in  the
    same  proportion  used in  determining  the underwriter  limitation  in this
    Section. If the registration does not become effective due to the withdrawal
    of Registrable  Securities,  then  either (1)  the  Stockholders  requesting
    registration  shall reimburse the Company for expenses incurred in complying
    with the  request  or (2)  the  aborted  registration shall  be  treated  as
    effected for purposes of Section 2(a)(D).

    3.  COMPANY REGISTRATION.

        (a)  NOTICE OF REGISTRATION.  Subject to the terms of this Agreement, if
    the  Company shall  determine to  register any  shares of  its Common Stock,
    either for its own account  or the account of  a security holder or  holders
    exercising  their respective demand  registration rights, other  than: (A) a
    registration  relating  solely   to  employee  benefit   plans;  or  (B)   a
    registration   relating  solely  to  a  transaction  pursuant  to  Rule  145
    promulgated under the Securities Act; the Company will:

           (i) promptly give to each Stockholder written notice thereof; and

           (ii) include  in such  registration  (and any  related  qualification
       under  blue  sky  laws  or other  compliance),  and  in  any underwriting
       involved therein, all the Registrable  Securities specified in a  written
       request  or requests, made  within 10 days after  receipt of such written
       notice from the Company, by any Stockholder or Stockholders;

        (b)  NOTICE OF UNDERWRITING.   If the registration of which the  Company
    gives  notice is for a registered public offering involving an underwriting,
    the Company shall so advise the Stockholders as a part of the written notice
    given pursuant to Section 3(a). In such event, the right of any  Stockholder
    to  registration  shall  be  conditioned  upon  such  underwriting  and  the
    inclusion of the  Registrable Securities  held by such  Stockholder in  such
    underwriting  to the  extent provided  in this  Section 3.  All Stockholders
    proposing  to   distribute  their   Registrable  Securities   through   such
    underwriting   (together  with  the  Company   and  the  other  stockholders
    distributing their securities through such underwriting) shall enter into an
    underwriting  agreement  with  the  Underwriter's  Representative  for  such
    offering.  The  Stockholders  shall  have no  right  to  participate  in the
    selection of the underwriters for an offering pursuant to this Section 3.

        (c)  UNDERWRITER'S REPRESENTATIVE.  Notwithstanding any other  provision
    of  this  Section,  if  the  Underwriter's  Representative  determines  that
    marketing factors require a  limitation of the number  of shares of  Company
    Common  Stock to be underwritten, the Underwriter's Representative may limit
    (or exclude altogether) the number of Registrable Securities to be  included
    in  the registration and underwriting. In such event, the Company shall also
    advise all Stockholders of Registrable  Securities which would otherwise  be
    registered and underwritten pursuant hereto,

                                       3
<PAGE>
    and  the number of shares of Registrable  Securities that may be included in
    the registration and underwriting shall be allocated among the  Stockholders
    in  proportion,  as  nearly as  practicable,  to the  respective  amounts of
    Registrable  Securities  held  by  such  Stockholder.  If  any   Stockholder
    disapproves  of the  terms of  any such  underwriting, such  Stockholder may
    elect to  withdraw  therefrom by  written  notice  to the  Company  and  the
    Underwriter's   Representative.  Any  Registrable   Securities  excluded  or
    withdrawn from such underwriting shall be withdrawn from such registration.

        (d)  RIGHT TO TERMINATE REGISTRATION.  The Company shall have the  right
    to terminate or withdraw any registration initiated by it under this Section
    prior  to  the  effectiveness  of  such  registration  whether  or  not  any
    Stockholder has elected to include securities in such registration.

    4.  REGISTRATION PROCEDURES.

        (a)  COMPANY PROCEDURES.  In connection with the Company's  registration
    obligations  pursuant to  Section 2,  the Company  shall not  be required to
    maintain and keep any such  registration under the Securities Act  effective
    for  a  period  equal  to the  shorter  of  thirty (30)  days  or  that time
    reasonably necessary to permit the disposition of the Registrable Securities
    subject to such registration. Subject to such limitation, in connection with
    the Company's registration  obligations pursuant  to Sections 2  and 3,  the
    Company shall:

           (i)  keep each of  the Stockholders whose  Registrable Securities are
       included in any registration advised as to the initiation and  completion
       of such registration;

           (ii)  deliver to each Stockholder, without  charge, as many copies of
       the then-effective Prospectus  covering such  Registrable Securities  and
       any  amendments or supplements thereto as such Stockholder may reasonably
       request;

           (iii) cooperate  with  the  Stockholders  to  facilitate  the  timely
       preparation   and  delivery  of   certificates  representing  Registrable
       Securities to be sold; and

           (iv) prepare and  file, if necessary,  a post-effective amendment  or
       supplement to the Registration Statement or the related Prospectus(es) or
       any document incorporated therein by reference or file any other required
       document  so  that such  Registration Statement  and Prospectus  will not
       thereafter contain an  untrue statement  of a  material fact  or omit  to
       state  any material  fact necessary  to make  the statements  therein not
       misleading.

        (b)  STOCKHOLDER PROCEDURES.

           (i) The  Company  may require  each  Stockholder to  furnish  to  the
       Company  in writing such  information regarding such  Stockholder and the
       distribution of such Registrable Securities as the Company may from  time
       to time reasonably request in writing.

           (ii)  Each Stockholder agrees  to use its  reasonable best efforts to
       cooperate with the Company in connection with the preparation and  filing
       of a Registration Statement.

    5.    REGISTRATION  EXPENSES.   All  Registration  Expenses  (defined below)
incident to a registration of Registrable  Securities pursuant to Section 2  and
Section 3 of this Agreement shall be borne by the Company. Registration Expenses
shall  include all registration and filing fees, fees and expenses of compliance
with securities or blue sky laws (including fees and disbursements of counsel in
connection with blue sky  qualifications or registrations  (or the obtaining  of
exemptions   therefrom)  of  the   Registrable  Securities),  printing  expenses
(including expenses of printing Prospectuses), messenger and delivery  expenses,
internal  expenses (including, without limitation,  all salaries and expenses of
the Company's officers  and employees  performing legal  or accounting  duties),
fees  and disbursements of  the Company's counsel  and its independent certified
public accountants, securities acts liability  insurance (if the Company  elects
to   obtain   such   insurance),   reasonable   fees   and   expenses   of   any

                                       4
<PAGE>
special experts  retained by  the Company  in connection  with any  registration
hereunder,  and reasonable fees of a  single special counsel to the Stockholders
(all such  expenses  being  herein  referred  to  as  "Registration  Expenses");
PROVIDED,  HOWEVER, that  Registration Expenses shall  not include  any sales or
underwriting discounts,  commissions or  fees attributable  to the  sale of  the
Registrable Securities.

    6.  INDEMNIFICATION; CONTRIBUTION.

        (a)   INDEMNIFICATION BY  THE COMPANY.  The  Company shall indemnify and
    hold harmless, to the  full extent permitted by  law, each Stockholder,  and
    each  person who  controls (within  the meaning  of the  Securities Act) the
    Stockholder and  his  respective  representatives and  agents,  against  all
    losses,  claims,  damages,  liabilities and  expenses  (including reasonable
    costs of investigation  and legal  expenses) under the  Securities Act,  the
    Exchange  Act,  applicable state  securities  law, common  law  or otherwise
    resulting from or  based upon any  untrue or alleged  untrue statement of  a
    material  fact0  contained  in  the  Registration  Statements,  any  related
    Prospectus, or  any amendment  or  supplement thereto,  or any  omission  or
    alleged  omission  of  a material  fact  required  to be  stated  therein or
    necessary to  make the  statements therein,  in light  of the  circumstances
    under  which they were made, not misleading,  except in each case insofar as
    the same arises  out of  or is  based upon  an untrue  statement or  alleged
    untrue  statement of a material  fact or an omission  or alleged omission to
    state a material fact in such Registration Statement, Prospectus,  amendment
    or  supplement, as the case may be, made  or omitted, as the case may be, in
    reliance upon and in  conformity with written  information furnished to  the
    Company  by such Stockholder  expressly for use  therein, and will reimburse
    each  Stockholder,  each   such  controlling  person   and  his   respective
    representatives  and  agents for  any  legal and  other  expenses reasonably
    incurred as  such  expenses are  incurred  by such  Stockholder,  each  such
    controlling   person  and  his  respective  representatives  and  agents  in
    connection with investigating, defending, settling, compromising or  payment
    any such loss, claim, damages, liability or expense; provided, however, that
    the  Company will not be liable to any such person or entity with respect to
    any such  untrue  statement  or  omission or  alleged  untrue  statement  or
    omission  made in any preliminary prospectus  that is corrected in the final
    prospectus filed with  the Commission  pursuant to  Rule 424(b)  promulgated
    under the Securities Act (or any amendment or supplement to such prospectus)
    if  the person asserting any such  loss, claim, damage, liability or expense
    purchased securities but was not sent or given a copy of the prospectus  (as
    amended or supplemented) at or prior to the written confirmation of the sale
    of  such securities to  such person in  any case where  such delivery of the
    prospectus (as amended or supplemented)  is required by the Securities  Act,
    unless  such failure to deliver the  prospectus (as amended or supplemented)
    was a result of the Company's failure to provide such prospectus (as amended
    or supplemented). This indemnity  is in addition to  any liability that  the
    Company may otherwise have.

        (b)    INDEMNIFICATION  BY  THE HOLDERS.    Each  Stockholder  shall, if
    Registrable Securities are included in  a registration effected pursuant  to
    this Agreement, indemnify and hold harmless, to the full extent permitted by
    law,   the   Company,   its  respective   officers,   directors,  employees,
    representatives and agents, and each person who controls (within the meaning
    of the Securities  Act) the  Company, against all  losses, claims,  damages,
    liabilities  and expenses  (including reasonable costs  of investigation and
    legal expenses) under the Securities Act, the Exchange Act, applicable state
    securities law, common  law or otherwise  resulting from or  based upon  any
    untrue  and alleged  untrue statement  of a  material fact  contained in any
    Registration Statement,  any  Prospectus,  or any  amendment  or  supplement
    thereto,  or any omission or alleged omission of a material fact required to
    be stated therein or necessary to  make the statements therein, in light  of
    the  circumstances under which they were made, not misleading, to the extent
    the same arises  out of  or is  based upon  an untrue  statement or  alleged
    untrue  statement of a material  fact or an omission  or alleged omission to
    state a material fact in such Registration Statement, Prospectus,  amendment
    or  supplement, as the case may be, made  or omitted, as the case may be, in
    reliance upon and in  conformity with written  information furnished to  the
    Company  by such Stockholder  expressly for use  therein, and will reimburse
    the Company, its respective officers, directors,

                                       5
<PAGE>
    employees, representatives and agents, and each person who controls  (within
    the  meaning of  the Securities  Act) the Company,  for any  legal and other
    expenses reasonably incurred as  such expenses are  incurred by the  Company
    and   each  such  controlling  person   in  connection  with  investigating,
    defending, settling, compromising  or paying any  such loss, claim,  damage,
    liability  or  expense;  provided,  however,  that  the  obligations  of the
    Stockholders hereunder shall  be limited  to an  amount equal  to the  gross
    proceeds  before  expenses  and  commissions  to  each  such  Stockholder of
    Registrable Securities sold  as contemplated  herein. This  indemnity is  in
    addition to any liability that such Stockholder may otherwise have.

        (c)   CONDUCT  OF INDEMNIFICATION PROCEEDINGS.   Each  party entitled to
    indemnification under this  Section 6 (the  "Indemnified Party") shall  give
    notice  to the party required  to provide indemnification (the "Indemnifying
    Party") promptly after such  Indemnified Party has  actual knowledge of  any
    claim as to which indemnity may be sought, and shall permit the Indemnifying
    Party  to assume the defense  of any such claim  or any litigation resulting
    therefrom; provided,  that  counsel for  the  Indemnifying Party,  who  will
    conduct  the  defense  of  such  claim or  litigation,  is  approved  by the
    Indemnified Party  (whose  approval will  not  be unreasonably  withheld  or
    delayed);  and provided, further, that the  failure of any Indemnified Party
    to give notice as provided herein  shall not relieve the Indemnifying  Party
    of  its obligations except  to the extent  that its defense  of the claim or
    litigation involved is prejudiced by such failure. The Indemnified Party may
    participate in such defense at such party's expense; provided, however, that
    the Indemnifying  Party shall  pay such  expense if  representation of  such
    Indemnified Party by the counsel retained by the Indemnifying Party would be
    inappropriate  due to actual or potential  conflicts of interest between the
    Indemnified Party and any  other party represented by  such counsel in  such
    proceeding.  No  Indemnifying Party,  in the  defense of  any such  claim or
    litigation, shall,  except  with  the consent  of  each  Indemnified  Party,
    consent  to entry of any judgment or enter into any settlement that does not
    include as  an unconditional  term thereof  the giving  by the  claimant  or
    plaintiff  to  such Indemnified  Party of  a release  from all  liability in
    respect of any claim or litigation, and no Indemnified Party will consent to
    entry of any judgment  or settle any claim  or litigation without the  prior
    written  consent  of the  Indemnifying Party.  Each Indemnified  Party shall
    furnish such  information  regarding himself  or  itself and  the  claim  in
    question  as the Indemnifying  Party may reasonably request  and as shall be
    reasonably required  in  connection  with  the defense  of  such  claim  and
    litigation resulting therefrom.

        (d)  CONTRIBUTION.

           (i)  If  for  any reason  the  indemnification provided  for  in this
       Section 5 from  an Indemnifying Party,  although otherwise applicable  by
       its  terms,  is determined  by a  court of  competent jurisdiction  to be
       unavailable to  an Indemnified  Party  hereunder, then  the  Indemnifying
       Party,  in lieu of indemnifying  such Indemnified Party, shall contribute
       to the amount paid or payable by such Indemnified Parties as a result  of
       such  losses, claims, damages, liabilities or expenses in such proportion
       as is appropriate to reflect the relative fault of an Indemnifying  Party
       and  Indemnified Parties in connection with  the actions that resulted in
       such losses, claims,  damages, liabilities  or expenses, as  well as  any
       other  relevant  equitable  considerations.  The  relative  fault  of the
       Indemnifying  Party  and  Indemnified  parties  shall  be  determined  by
       reference  to,  among  other  things,  whether  any  action  in question,
       including any untrue or alleged untrue statement of a material fact,  has
       been made by, or relates to information supplied by, an Indemnified Party
       or  Indemnified  Parties, and  the  parties' relative  intent, knowledge,
       access to information and opportunity to correct or prevent such  action.
       The  amount paid or payable by a party as a result of the losses, claims,
       damages, liabilities and expenses  referred to above  shall be deemed  to
       include,  subject to the limitations set forth in Section 6(c), any legal
       or other fees or expenses reasonably incurred by such party in connection
       with any investigation or proceeding.

           (ii) The parties hereto agree that it would not be just and equitable
       if contribution pursuant to this Section 6(d) were determined by pro rata
       allocation or by any other method

                                       6
<PAGE>
       of allocation that does not take account of the equitable  considerations
       referred  to in the immediately preceding  paragraph. No Person guilty of
       fraudulent misrepresentation (within the meaning of Section 11(f) of  the
       Securities Act) shall be entitled to contribution from any Person who was
       not guilty of such fraudulent misrepresentation.

    7.    SUBSEQUENT  REGISTRATION RIGHTS.    In connection  with  any requested
registration effected pursuant to Section 2 above, the Company shall be entitled
to grant to any holder  or prospective holder of  any securities of the  Company
the  right to include  such securities in  such registration; provided, however,
that the  inclusion  of  such  securities  in  any  such  registration  that  is
underwritten shall be limited or excluded altogether if the managing underwriter
advises  the Company in writing that marketing factors require such a limitation
or exclusion. The rights of such holders or prospective holders to include  such
securities in such registration where the managing underwriters does accept such
inclusion shall be subordinate to the rights of any Stockholder or Stockholders.

    8.   TRANSFER OF RIGHTS.   Provided that the  Company is given prior written
notice of such assignment, the rights granted hereunder to cause the Company  to
register  securities may be assigned  to (i) a transferee  who acquires at least
1,000 shares of  Registrable Securities  and (ii) any  affiliate or  constituent
partner or stockholder of a Stockholder.

    9.  MISCELLANEOUS.

        (a)   SPECIFIC PERFORMANCE.   The parties  hereto agree that irreparable
    damage would occur in the event any of the provisions of this Agreement were
    not to be performed in accordance with the terms hereof and that the parties
    shall be entitled to specific performance  of the terms hereof, in  addition
    to any other remedy at law or in equity.

        (b)   AMENDMENTS AND WAIVERS.   Except as otherwise provided herein, the
    provisions of this Agreement may  not be amended, modified or  supplemented,
    and  waivers or consents to departures from the provisions hereof may not be
    given unless the Company  shall have obtained the  prior written consent  of
    the  Stockholders holding  50% of  the securities  at the  time constituting
    Registrable Securities.

        (c)  NOTICES.  All  notices, requests, waivers, releases, consents,  and
    other  communications required or permitted by this Agreement (collectively,
    "Notices") shall be in writing.  Notices shall be deemed sufficiently  given
    for  all  purposes  under  this Agreement  when  delivered  in  person, when
    dispatched  by  telegram  or  (upon  written  confirmation  of  receipt)  by
    electronic facsimile transmission or (upon written confirmation of receipt),
    when  dispatched by  a nationally  recognized overnight  courier service, or
    five Business Days after  being deposited in the  mail, postage prepaid,  if
    mailed. all Notices shall be delivered as follows:

           (i)  if to a  Stockholder, at the address  indicated on the signature
       pages to this Agreement;

           (ii) if to the Company, at:

                Informix Software, Inc.
               4100 Bohannon Drive
               Menlo Park, California 94025
               Attention: David H. Stanley, Esq.

                with a copy to:

                Wilson, Sonsini, Goodrich & Rosati
               650 Page Mill Road
               Palo Alto, California 94034-1050
               Attention: Douglas H. Collom, Esq.

                                       7
<PAGE>
          (iii) if to a Stockholder, with a copy to:

                Cooley, Godward, Castro, Huddleson & Tatum
               Five Palo Alto Square
               3000 El Camino Real
               Palo Alto, California 94306-2155
               Attention: Gregory C. Smith, Esq.

        (d)  SUCCESSORS AND ASSIGNS.   This Agreement shall be binding upon  and
    shall  inure  to the  benefit  of the  Company  and each  Stockholder, their
    respective successors,  heirs, legal  representatives, and  with respect  to
    Stockholders, their assignees, including without limitation all partners and
    stockholders in the event of a distribution of the Registrable Securities by
    such Stockholders.

        (e)   COUNTERPARTS.   This  Agreement may be  executed in  any number of
    counterparts and by the parties in separate counterparts, each of which when
    so executed  shall be  deemed  to be  an original  and  all of  which  taken
    together shall constitute one and the same agreement.

        (f)   HEADINGS;  CONSTRUCTION.  The  headings in this  Agreement are for
    convenience of reference only  and shall not limit  or otherwise affect  the
    meaning  hereof. Unless  the context  otherwise requires,  all references to
    Sections are to Sections of this Agreement, "or" is inclusively disjunctive,
    and words in the  singular include the plural  and vice versa. In  computing
    any  period of time specified in this  Agreement or in any Notices, the date
    of the act or event from which such  period of time is to be measured  shall
    be  included, any such period shall expire at 5:00 p.m., San Francisco time,
    on the last day of  such period, and any  such period denominated in  months
    shall  expire on the date in the last month of such period that has the same
    numerical designation as the date of the act or event from which such period
    is to be measured; provided, however, that if there is not date in the  last
    month  of such period that has the same numerical designation as of the date
    of such act or event, such period shall  expire on the last day of the  last
    month of such period.

        (g)   GOVERNING LAW.  This Agreement  shall be governed by and construed
    in accordance with  the internal laws  of the State  of California,  without
    regard to the principles of conflicts of laws thereof.

        (h)   SEVERABILITY.   If one  or more  of the provisions  hereof, or the
    applicable  thereof  in  any  circumstance,  is  held  invalid,  illegal  or
    unenforceable  in any  respect, for any  reason, the  validity, legality and
    enforceability of the remaining  provisions hereof shall not  be in any  way
    affected or impaired thereby, and the provisions held to be invalid, illegal
    or unenforceable shall be reformed to the minimum extent necessary, and in a
    manner  as consistent with the purposes thereof  as is practicable, so as to
    render it valid, legal and enforceable.

        (i)  ENTIRE AGREEMENT.  This Agreement is intended by the parties hereto
    to be  a final  expression thereof  and is  intended to  be a  complete  and
    exclusive  statement of the  agreement and understanding  of such parties in
    respect of the  subject matter contained  herein. This Agreement  supersedes
    all   prior  agreements  and  understandings   among  the  Company  and  any
    Stockholders with respect  to such subject  matter; provided, however,  that
    the  restrictions described herein are in addition to, and not in limitation
    of,  any  other  restrictions  that  may  be  applicable  to  each  of   the
    Stockholders, including, without limitation, (i) any restrictions applicable
    under the agreements from affiliates of STG dated October 25, 1995, executed
    by  certain of stockholders and affiliates  of STG and (ii) any restrictions
    applicable to officers and directors generally under policies of the Company
    (including, without limitation, policies  relating to executive officers  of
    the Company in connection with Section (16)(a) of the Exchange Act).

                                       8
<PAGE>
    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed as of the day and year first above written.

"COMPANY"                                INFORMIX CORPORATION

                                         By: ___________________________________

                                         Name: _________________________________

                                         Title: ________________________________

"STOCKHOLDERS"

                                          ______________________________________
                                          Signature

                                          ______________________________________
                                          Print Name

                 [REGISTRATION RIGHTS AGREEMENT SIGNATURE PAGE]

                                       9
<PAGE>
                                   EXHIBIT A

                            SCHEDULE OF STOCKHOLDERS

                                 Jonathan Kraft

                                David Lichtblau

                                Kirill Sheynkman

                    Hummer Winblad Technology Funds II, L.P.

                    Hummer Winblad Venture Partners II, L.P.

                               Sequoia Capital VI

                         Sequoia Technology Partners VI

                                 Andrea Rester

                                       10

<PAGE>
                                                                     EXHIBIT 5.1

                                January 17, 1996

Informix Corporation
4100 Bohannon Drive
Menlo Park, California 94025

         RE:  Informix Corporation; Registration Statement on Form S-3

Ladies and Gentlemen:

    We  have examined the Registration Statement on  Form S-3 to be filed by you
with  the  Securities  and  Exchange   Commission  on  January  18,  1996   (the
"Registration  Statement"),  in  connection  with  the  registration  under  the
Securities Act of 1933, as amended, of 231,900 shares of your Common Stock,  par
value  $0.01 per share (the "Shares"), all of which are authorized and have been
previously issued to the Selling  Stockholders named therein in connection  with
the  acquisition  by the  Company of  all  of the  outstanding capital  stock of
Stanford Technology Group,  Inc. The  Shares are to  be offered  by the  Selling
Stockholders  for sale to the public as described in the Registration Statement.
As your  counsel in  connection  with this  transaction,  we have  examined  the
proceedings  taken and proposed to  be taken in connection  with the sale of the
Shares.

    It is our opinion  that, upon completion of  the proceedings being taken  or
contemplated to be taken prior to the registration of the Shares, including such
proceedings  to be  carried out  in accordance with  the securities  laws of the
various states, where required, the Shares, when sold in the manner referred  to
in  the Registration Statement,  will be legally and  validly issued, fully paid
and nonassessable.

    We consent to  the use of  this opinion  as an exhibit  to the  Registration
Statement,  and further consent to the use of our name wherever appearing in the
Registration Statement, including  the Prospectus constituting  a part  thereof,
and any amendment thereto.

                                          Very truly yours,

                                          /s/  WILSON, SONSINI, GOODRICH &
                                          ROSATI

                                          WILSON, SONSINI, GOODRICH & ROSATI
                                          Professional Corporation

<PAGE>
                                                                    EXHIBIT 23.1

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

    We  consent to the incorporation by  reference in the Registration Statement
(Form S-3) of Informix Corporation and  in the related Prospectus of our  report
dated  February 6, 1995,  with respect to  the consolidated financial statements
and schedule of Informix Corporation included  in its Annual Report (Form  10-K)
for the year ended December 31, 1994.

                                                  /s/  ERNST & YOUNG LLP

San Jose, California
January 18, 1996


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