EXHIBIT 11.1
 
                                INFORMIX CORPORATION
 
                      COMPUTATION OF NET INCOME PER SHARE
                     (IN THOUSANDS, EXCEPT PER-SHARE DATA)
 


                                                                                FOR THE YEARS ENDED DECEMBER 31,
                                                                               ----------------------------------
                                                                                  1996      1995(1)    1994(1)(2)
                                                                               ----------  ----------  ----------
                                                                                              
Net income used for net income (loss) per-share calculation..................  $  (73,565) $   38,600  $   48,293
Net Income Per Common Share:
  Weighted average outstanding shares........................................     149,310     145,062     137,742
  Net effect of outstanding options..........................................      --           5,565       5,040
  Weighted average common and common equivalent shares outstanding...........     149,310     150,627     142,782
Net income (loss) per-share..................................................  $     (.49) $      .26  $      .34
                                                                               ----------  ----------  ----------
                                                                               ----------  ----------  ----------

 
    Fully diluted computation not presented since such amounts differ by less
than 3 percent of the net income (loss) per share amounts shown above.
 
Notes:
 
(1) Amounts presented have been restated to reflect the Company's business
    combination with Illustra Information Technologies, Inc. as a
    pooling-of-interests.
 
(2) Share and per-share information has been restated to reflect a two-for-one
    stock split (effected in the form of a stock dividend) which was effective
    June 26, 1995.