RATIONAL SOFTWARE CORP
S-8, 1999-01-22
PREPACKAGED SOFTWARE
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    As filed with the Securities and Exchange Commission on January 22, 1999
                                                   Registration No. 333-
================================================================================
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                             ___________________ 

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

                         RATIONAL SOFTWARE CORPORATION
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                             ___________________  

          DELAWARE                                      54-1217099
(STATE OR OTHER JURISDICTION OF                       (I.R.S. EMPLOYER
INCORPORATION OR ORGANIZATION)                      IDENTIFICATION NUMBER)

                             ___________________ 
                             18880 HOMESTEAD ROAD
                         CUPERTINO, CALIFORNIA  95014
                                (408) 863-9900
(ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

                    1998 Employee Stock Purchase Plan
                           (FULL TITLE OF THE PLAN)
                             ___________________  

                              TIMOTHY A. BRENNAN
                     CHIEF FINANCIAL OFFICER AND SECRETARY
                               RATIONAL SOFTWARE
                                  CORPORATION
                             18880 HOMESTEAD ROAD
                         CUPERTINO, CALIFORNIA  95014
                                (408) 863-9900
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
                              ___________________ 

                                   Copy to:
                           GAIL CLAYTON HUSICK, ESQ.
                          MARTIN A. WELLINGTON, ESQ.
                       WILSON SONSINI GOODRICH & ROSATI
                           PROFESSIONAL CORPORATION
                              650 PAGE MILL ROAD
                              PALO ALTO, CA 94304
                                (650) 493-9300
                             ___________________ 

                         CALCULATION OF REGISTRATION FEE
============================================================================
<TABLE>
<CAPTION>
                                           Proposed   Proposed
                                            Maximum    Maximum
         Title of Each            Amount   Offering   Aggregate   Amount of
      Class of Securities         to be    Price Per  Offering   Registration
        to be Registered        Registered Share(1)   Price(1)     Fee(2)
- ------------------------------- ---------- --------- ----------- -----------
<S>                             <C>        <C>       <C>         <C>
1998 Employee Stock Purchase
 Plan Common Stock, $0.01 par
 value (shares reserved for
 future grant)...                 191,261    $26.35  $5,039,727   $1,401.05
                                ---------- --------- ----------- -----------
        TOTALS..................  191,261    $26.35  $5,039,727   $1,401.05
============================================================================
</TABLE>

(1) The indicated number of shares to be registered represents additional shares
    issuable under the listed plan that are not covered by prior registration
    statements. Price per share and aggregate offering price estimated in
    accordance with Rule 457 (h) under the Securities Act of 1933, as amended,
    solely for the purpose of calculating the registration fee.  The
    computation is based upon eighty-five percent of  the average of the high
    and low price as reported on the Nasdaq National Market on January 15,
    1999, the price at which options are granted pursuant to the plan.

============================================================================


STATEMENT UNDER GENERAL INSTRUCTION E - REGISTRATION OF ADDITIONAL SECURITIES

   The Registrant previously filed a Registration Statement on Form S-8 with the
Secutities and Exchange Commission on or about August 4, 1998 (SEC File No.333-
60579) (the "Previous Form S-8"). The Previous Form S-8 was filed in connection
with, among other plans, the 1998 Employee Stock Purchase Plan (the "1998
ESPP"). This Registration Statement registers additional shares of the
Registrant's Common Stock to be issued pursuant to the 1998 ESPP.  The contents
of the   Previous Form S-8, including periodic reports filed or to be filed by
the Registrant after the Previous Form S-8 to maintain current information
about the Registrant are incorporated by reference into this Registration
Statement pursuant to General Instruction E of Form S-8.

<PAGE>












                                    PART II

               INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


Item 8.  Exhibits
         --------

         Exhibit    Description
         Number  
         4.1        The 1998 Employee Stock Purchase Plan filed herewith
         5.1        Opinion of counsel as to legality of Securities being
                    registered.
         23.1       Consent of Ernst & Young LLP, Independent Auditors
         23.2       Consent of Counsel (contained in Exhibit 5.1)
         24.1       Power of Attorney (see page II-2) 


                                     II-1
<PAGE>




































                                   SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-8 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Cupertino, State of California, on
January 21, 1999.

                                     RATIONAL SOFTWARE CORPORATION



                            By:   /s/ Timothy A. Brennan
                                  -----------------------
                            Timothy A. Brennan
                            Senior Vice President, Chief Financial Officer,
                            and Secretary
                            (Principal Financial Officer & Principal
                            Accounting Officer)

                               POWER OF ATTORNEY

   KNOW ALL THESE PERSONS BY THESE PRESENTS, that each person whose signature
appears below constitutes and appoints Paul D. Levy and Timothy A. Brennan
jointly and severally, his attorneys-in-fact, each with the power
of substitution, for him in any and all capacities, to sign any
amendments to this Registration Statement on Form S-8 and to file the same, with
exhibits thereto and other documents in connection therewith, with the
Securities and Exchange Commission, hereby ratifying and conforming all that
each said attorneys-in-fact, or his substitute or substitutes, may do or cause
to be done by virtue hereof.

   Pursuant to the requirements of the Securities Act of 1933, this Registration
Statement has been signed by the following persons in the capacities and on the
date indicated.

<TABLE>
<S>                     <C>
Date: January 21, 1999  /s/ Paul D. Levy
                        --------------------------------------------
                        Paul D. Levy, Chairman of the Board
                        and Chief Executive Officer

Date: January 21, 1999  /s/ Michael T. Devlin
                        --------------------------------------------
                        Michael T. Devlin, President and Director


Date: January 21, 1999  /s/ Timothy A. Brennan
                        --------------------------------------------
                        Senior Vice President, Chief Financial Officer,
                        and Secretary
                        (Principal Financial Officer
                        & Principal Accounting Officer)

Date: January 21, 1999  /s/ James S. Campbell
                        --------------------------------------------
                        James S. Campbell, Director

Date: January 21, 1999  /s/ Daniel H. Case III
                        --------------------------------------------
                        Daniel H. Case III, Director

Date: January 21, 1999  /s/ Leslie G. Denend
                        --------------------------------------------
                        Leslie G. Denend, Director

Date: January 21, 1999  /s/ John E. Montague
                        --------------------------------------------
                        John E. Montague, Director

Date: January 21, 1999  /s/ Allison R. Schleicher
                        --------------------------------------------
                        Allison R. Schleicher, Director
</TABLE>




<PAGE>































INDEX TO EXHIBITS

Exhibit Number         Exhibit Document
- -------------         -----------------------------------------------------
     4.1              1998 Employee Stock Purchase Plan incorporated herin by
                      reference  to the Registrant's Registration Statement on
                      Form S-8 as filed on August 4, 1998. File No. 333-60579.

     5.1              Opinion of Wilson Sonsini Goodrich & Rosati, Professional
                      Corporation, as to the legality of securities being
                      registered (Counsel to the Registrant) filed herewith

     23.1             Consent of Ernst & Young, L.L.P. filed herewith

     23.2             Consent of Wilson Sonsini Goodrich & Rosati, Professional
                      Corporation (contained in Exhibit 5.1 hereto)

     24.1             Power of Attorney (see page II-2)





<PAGE>

          RATIONAL SOFTWARE CORPORATION

        1998 EMPLOYEE STOCK PURCHASE PLAN

(As Amended Through October 31, 1998)



The following constitute the provisions of the 1998 Employee Stock 
Purchase Plan (herein called the "Plan") of Rational Software 
Corporation (herein called the "Company").

1.      Purpose.  The purpose of the Plan is to provide employees of 
the Company and its Designated Subsidiaries with an opportunity to 
purchase Common Stock of the Company through accumulated payroll 
deductions.  It is the intention of the Company to have the Plan qualify 
as an "Employee Stock Purchase Plan" under Section 423 of the Internal 
Revenue Code of 1986.  The provisions of the Plan shall, accordingly, be 
construed so as to extend and limit participation in a manner consistent 
with the requirements of that section of the Code.

2.      Definitions.

(a)     "Board" shall mean the Board of Directors of the Company.

(b)     "Code" shall mean the Internal Revenue Code of 1986, as amended.

(c)     "Common Stock" shall mean the Common Stock of the Company.

(d)     "Company" shall mean Rational Software Corporation, a 
Delaware corporation and any Designated Subsidiary of the Company.

(e)     "Compensation," unless otherwise determined by the 
Board, shall mean all regular straight time earnings, including 
commissions, but exclusive of payments for overtime, shift premium, 
incentive compensation, incentive payments, bonuses, or other 
compensation.

(f)     "Continuous Status as an Employee" shall mean the 
absence of any interruption or termination of service as an Employee.  
Continuous Status as an Employee shall not be considered interrupted in 
the case of a leave of absence agreed to in writing by the Company, 
provided that such leave is for a period of not more than 90 days or 
reemployment upon the expiration of such leave is guaranteed by contract 
or statute.

(g)     "Designated Subsidiaries" shall mean the Subsidiaries 
which have been designated by the Board from time to time in its sole 
discretion as eligible to participate in the Plan.


(h)     "Employee" shall mean any person, including an 
officer, who is customarily employed for at least twenty (20) hours per 
week and more than five (5) months in a calendar year by the Company or 
one of its Designated Subsidiaries.

(i)     "Exercise Date," unless otherwise determined by the 
Board, shall mean the last Trading Day of each Exercise Period. 

(j)     "Exercise Period," unless otherwise determined by the 
Board, shall mean a period commencing on an Offering Date or on the day 
after an Exercise Date and terminating on the last Trading Day before 
the commencement of the next Offering Period under the Plan.

(k)     "Offering Period," unless otherwise set forth herein 
or determined by the Board, shall mean a period of twenty-four (24) 
months consisting of four (4) six-month Exercise Periods during which 
options granted pursuant to the Plan may be exercised.

(l)     "Offering Date," unless otherwise determined by the 
Board, shall mean the first day of each Offering Period of the Plan.

(m)     "Plan"  shall mean this 1998 Employee Stock Purchase 
Plan.

(n)     "Subsidiary"  shall mean a corporation, domestic or 
foreign, of which not less than 50% of the voting shares are held by the 
Company or a Subsidiary, whether or not such corporation now exists or 
is hereafter organized or acquired by the Company or a Subsidiary.

(o)     "Trading Day" shall mean a day on which the principal 
stock exchange or quotation system on which the Company's stock is 
traded is open for trading. 

3.      Eligibility.

(a)     Any Employee as defined in paragraph 2 who shall be 
employed by the Company on the Offering Date shall be eligible to 
participate in the Plan, subject to limitations imposed by 
Section 423(b) of the Code.

(b)     Any provisions of the Plan to the contrary 
notwithstanding, no Employee shall be granted an option under the Plan 
(i) if, immediately after the grant, such Employee (or any other person 
whose stock would be attributed to such Employee pursuant to 
Section 424(d) of the Code) would own stock and/or hold outstanding 
options to purchase stock possessing five percent (5%) or more of the 
total combined voting power or value of all classes of stock of the 
Company or of any subsidiary of the Company, or (ii) which permits such 
Employee's rights to purchase stock under all employee stock purchase 
plans of the Company and its subsidiaries to accrue at a rate which 
exceeds Twenty-Five Thousand Dollars ($25,000) of fair market value of 
such stock (determined at the time such option is granted) for each 
calendar year in which such option is outstanding at any time.


4.      Offering Periods.  Unless otherwise determined by the Board, 
the Plan shall be implemented by consecutive, overlapping twenty-four 
(24) month Offering Periods beginning every six (6) months on the first 
Trading Day on or after May 1 and November 1 of each year, until 
terminated in accordance with Section 20 hereof; provided that, the 
first Offering Period (the "First Offering Period") shall begin on the 
first Trading Day after the Company's Annual Meeting on July 16, 1998 
and shall end on the last Trading Day before May 1, 2000.  The Board of 
Directors of the Company shall have the power to change the commencement 
date, termination date and duration of offering periods with respect to 
future offerings without stockholder approval at any time.

5.      Participation.

(a)     An eligible Employee may become a participant in the 
Plan by completing a subscription agreement authorizing payroll 
deductions on the form provided by the Company and filing it with the 
Company's payroll office at least one week prior to the applicable 
Offering Date, unless a later time for filing the subscription agreement 
is set by the Board for all eligible Employees with respect to a given 
offering.

(b)     Payroll deductions for a participant shall continue at 
the rate specified in the subscription agreement throughout an Offering 
Period with automatic re-enrollment for the Offering Period which 
commences the day after the last Exercise Date of any Offering Period at 
the same rate specified in the original subscription agreement, subject 
to any change in subscription rate made pursuant to Section 6(c) or (d), 
unless sooner terminated by the participant as provided in Section 11.

6.      Payroll Deductions.

(a)     At the time a participant files his or her 
subscription agreement, such participant shall elect to have payroll 
deductions made on each payday during the Offering Period in an amount 
not exceeding ten percent (10%) of his or her Compensation on each 
payroll date.  The aggregate of such payroll deductions during any 
Offering Period shall not exceed ten percent (10%) of his or her 
aggregate Compensation during said Offering Period.  Any Employee 
electing to participate in the First Offering Period who is 
simultaneously participating in the Company's 1994 Employee Stock 
Purchase Plan (the "1994 Plan") may elect to have such Employee's 
contributions under this Plan for such period include the amount, if 
any, contributed under the 1994 Plan that would otherwise be returned to 
such Employee in the event of a pro rata distribution pursuant to 
Section 12(a) of the 1994 Plan on October 30, 1998, provided, however, 
that the total amount contributed under the Plan and the 1994 Plan may 
not exceed 10% of such Employee's Compensation.

(b)     All payroll deductions made by a participant shall be 
credited to his or her account under the Plan and will be withheld in 
whole percentages only.  A participant may not make any additional 
payments into such account.


(c)     A participant may discontinue his or her participation 
in the Plan as provided in Section 11, or may increase or decrease the 
rate of his or her payroll deductions during the Offering Period by 
completing or filing with the Company a form provided by the Company 
notifying the payroll office of such withdrawal or reduction of 
withholding rate.  The change in rate shall be effective as of the next 
pay date following five (5) business days after the Company's receipt of 
the form or at such other time as the Company and the participant may 
agree.

(d)     Notwithstanding the foregoing, to the extent necessary 
to comply with Section 423(b)(8) of the Code and Section 3(b) hereof, a 
participant's payroll deductions may be decreased to 0% at such time 
during any Exercise Period which is scheduled to end during the current 
calendar year.  Payroll deductions shall recommence at the rate provided 
in such participant's subscription agreement at the beginning of the 
first Exercise Period which is scheduled to end in the following 
calendar year, unless terminated by the participant as provided in 
Section 11 hereof.

(e)     At the time the option is exercised, in whole or in 
part, or at the time some or all of the Company's Common Stock issued 
under the Plan is disposed of, the participant must make adequate 
provision for the Company's federal, state, or other tax withholding 
obligations, if any, which arise upon the exercise of the option or the 
disposition of the Common Stock.  At any time, the Company may, but 
shall not be obligated to, withhold from the participant's compensation 
the amount necessary for the Company to meet applicable withholding 
obligations, including any withholding required to make available to the 
Company any tax deductions or benefits attributable to sale or early 
disposition of Common Stock by the Employee.

7.      Grant of Option.

(a)     Unless otherwise determined by the Board, on the 
Offering Date of each Offering Period, each eligible Employee 
participating in the Plan shall be granted an option to purchase on each 
Exercise Date during such Offering Period (at the per share option 
price) up to a number of shares of the Company's Common Stock determined 
by dividing such Employee's payroll deductions to be accumulated prior 
to such Exercise Date by the lower of (i) eighty-five percent (85%) of 
the fair market value of a share of the Company's Common Stock on the 
Offering Date or (ii) eighty-five percent (85%) of the fair market value 
of a share of the Company's Common Stock on the Exercise Date; provided 
that in no event shall an Employee be permitted to purchase during an 
Exercise Period a number of shares in excess of a number determined by 
dividing $12,500 by the fair market value of a share of the Company's 
Common Stock on the Offering Date, and provided further that such pur-
chase shall be subject to the limitations set forth in Sections 3(b) and 
13 hereof.  The Board may, for future Offering Periods, increase or 
decrease, in its absolute discretion, the maximum number of shares of 
the Company's Common Stock an Employee may purchase during each Exercise 
Period of such Offering Period.  Exercise of the option shall occur as 
provided in Section 8 hereof, unless the participant has withdrawn 
pursuant to Section 11 hereof.  The option shall expire on the last day 
of the Offering Period.  Fair market value of a share of the Company's 
Common Stock shall be determined as provided in Section 7(b) herein.


(b)     Unless otherwise determined by the Board, the option 
price per share of the shares offered in a given Exercise Period shall 
be the lower of:  (i) 85% of the fair market value of a share of the 
Common Stock of the Company on the Offering Date; or (ii) 85% of the 
fair market value of a share of the Common Stock of the Company on the 
Exercise Date.  The fair market value of the Company's Common Stock on a 
given date shall be the closing price as quoted on the Nasdaq Stock 
Market, Inc.'s National Market or, if traded on a securities exchange, 
the closing price on such exchange.

8.      Exercise of Option.  Unless a participant withdraws from the 
Plan as provided in Section 11, his or her option for the purchase of 
shares will be exercised automatically on each Exercise Date of the 
Offering Period, and the maximum number of full shares subject to option 
will be purchased for him or her at the applicable option price with the 
accumulated payroll deductions in his or her account.  During his or her 
lifetime, a participant's option to purchase shares hereunder is 
exercisable only by him or her.

9.      Delivery.  As promptly as practicable after the Exercise 
Date of each offering, the Company shall arrange the delivery to each 
participant, as appropriate, of a certificate representing the shares 
purchased upon exercise of his or her option.  Any cash remaining which 
is insufficient to purchase a full share of Common Stock at the 
termination of each Exercise Period shall be applied to such 
participant's account in the subsequent Exercise Period unless the 
participant requests withdrawal of such cash.

10.     Automatic Transfer to Low Price Offering Period.  Unless 
otherwise determined by the Board, in the event that the fair market 
value of the Company's Common Stock is lower on an Exercise Date than it 
was on the first Offering Date for that Offering Period, all Employees 
participating in the Plan on the Exercise Date shall be deemed to have 
withdrawn from the Offering Period immediately after the exercise of 
their option on such Exercise Date and to have enrolled as participants 
in a new Offering Period which begins on or about the day following such 
Exercise Date.  A participant may elect to remain in the previous 
Offering Period by filing a written statement declaring such election 
with the Company prior to the time of the automatic change to the new 
Offering Period.

11.     Withdrawal; Termination of Employment.

(a)     A participant may withdraw all but not less than all 
the payroll deductions credited to his or her account and not yet used 
to exercise such participant's option under the Plan at any time prior 
to the Exercise Date of the Offering Period by giving written notice to 
the Company.  All of the participant's payroll deductions credited to 
his or her account will be paid to him or her at the next pay date after 
receipt of his or her notice of withdrawal and his or her option for the 
current period will be automatically terminated, and no further payroll 
deductions for the purchase of shares will be made during the Offering 
Period.  If a participant withdraws from an Offering Period, payroll 
deductions shall not resume at the beginning of the succeeding Offering 
Period unless the participant delivers to the Company a new subscription 
agreement.


(b)     Upon termination of the participant's Continuous 
Status as an Employee prior to the Exercise Date for any reason, 
including retirement or death, the payroll deductions credited to his or 
her account will be returned to the participant's or, in the case the of 
participant's death, to the person or persons entitled thereto under 
Section 15, and his or her option will be automatically terminated.  The 
preceding sentence notwithstanding, a participant who receives payment 
in lieu of notice of termination of employment shall be treated as 
continuing to be an Employee for the participant's customary number of 
hours per week of employment during the period in which the participant 
is subject to such payment in lieu of notice.

(c)     A participant's withdrawal from an offering will not 
have any effect upon his or her eligibility to participate in a 
succeeding offering or in any similar plan which may hereafter be 
adopted by the Company.

12.     Interest.  No interest shall accrue on the payroll 
deductions of a participant in the Plan.

13.     Stock.

(a)     The maximum number of shares of the Company's Common 
Stock which shall be made available for sale under the Plan shall be 
2,000,000 shares, plus a semi-annual increase to be made on the first 
Trading Day on or after May 1 and November 1 of each year (the 
"Refreshment Date") equal to the lesser of (i) such number of shares as 
is required to cause the number of shares reserved hereunder to equal 
2,000,000 as of the Refreshment Date after having given effect to all 
option exercises on the immediately preceding Exercise Date or (ii) a 
lesser amount determined by the Board, subject to adjustment upon 
changes in capitalization of the Company as provided in Section 19 
hereof.  Unless otherwise determined by the Board, if the total number 
of shares which would otherwise be subject to options granted pursuant 
to Section 7(a) hereof on any Exercise Date exceeds (i) the number of 
shares then available under the Plan or (ii) 500,000 shares, as adjusted 
for changes in capitalization of the Company as provided in Section 19 
hereof (such amount under clause (i) or (ii) being the "Available 
Amount"), the Company shall make a pro rata allocation of only the 
Available Amount, in as uniform a manner as shall be practicable and as 
it shall determine to be equitable.  In such event, the Company shall 
give written notice of such reduction of the number of shares subject to 
the option to each Employee affected thereby and shall similarly reduce 
the rate of payroll deductions, if necessary.

(b)     The participant will have no interest or voting right 
in shares covered by his or her option until such option has been 
exercised.

(c)     Shares to be delivered to a participant under the Plan 
will be registered in the name of the participant or in the name of the 
participant and his or her spouse.

14.     Administration.  The Plan shall be administered by the Board 
of Directors of the Company or a committee appointed by the Board.  The 
administration, interpretation or application of the Plan by the Board 
or its committee shall be final, conclusive and binding upon all 
participants.  

15.     Designation of Beneficiary.


(a)     A participant may file a written designation of a 
beneficiary who is to receive any shares and cash, if any, from the 
participant's account under the Plan in the event of such participant's 
death subsequent to the end of the offering period but prior to delivery 
to such participant of such shares and cash.  In addition, a participant 
may file a written designation of a beneficiary who is to receive any 
cash from the participant's account under the Plan in the event of such 
participant's death prior to the Exercise Date of the offering period.  
If a participant is married and the designated beneficiary is not the 
spouse, spousal consent shall be required for such designation to be 
effective.

(b)     Such designation of beneficiary may be changed by the 
participant at any time by written notice.  In the event of the death of 
a participant and in the absence of a beneficiary validly designated 
under the Plan who is living at the time of such participant's death, 
the Company shall deliver such shares and/or cash to the executor or 
administrator of the estate of the participant, or if no such executor 
or administrator has been appointed (to the knowledge of the Company), 
the Company, in its discretion, may deliver such shares and/or cash to 
the spouse or to any one or more dependents or relatives of the 
participant, or if no spouse, dependent or relative is known to the 
Company, then to such other person as the Company may designate.

16.     Transferability.  Neither payroll deductions credited to a 
participant's account nor any rights with regard to the exercise of an 
option or to receive shares under the Plan may be assigned, transferred, 
pledged or otherwise disposed of in any way (other than by will, the 
laws of descent and distribution or as provided in Section 15 hereof) by 
the participant.  Any such attempt at assignment, transfer, pledge or 
other disposition shall be without effect, except that the Company may 
treat such act as an election to withdraw funds in accordance with 
Section 11.

17.     Use of Funds.  All payroll deductions received or held by 
the Company under the Plan may be used by the Company for any corporate 
purpose, and the Company shall not be obligated to segregate such 
payroll deductions.

18.     Reports.  Individual accounts will be maintained for each 
participant in the Plan.  Statements of account will be given to 
participating Employees annually promptly following the Exercise Date, 
which statements will set forth the amounts of payroll deductions, the 
per share purchase price, the number of shares purchased and the 
remaining cash balance, if any.

19.     Adjustments Upon Changes in Capitalization.  Subject to any 
required action by the stockholders of the Company, the number of shares 
of Common Stock covered by each option under the Plan which has not yet 
been exercised and the number of shares of Common Stock which have been 
authorized for issuance under the Plan but have not yet been placed 
under option (collectively, the "Reserves"), as well as the price per 
share of Common Stock covered by each option under the Plan which has 
not yet been exercised, shall be proportionately adjusted for any 
increase or decrease in the number of issued shares of Common Stock 
resulting from a stock split or the payment of a stock dividend (but 
only on the Common Stock) or any other increase or decrease in the 
number of shares of Common Stock effected without receipt of 
consideration by the Company; provided, however, that conversion of any 
convertible securities of the Company shall not be deemed to have been 
"effected without receipt of consideration."  Such adjustment shall be 
made by the Board, whose determination in that respect shall be final, 
binding and conclusive.  Except as expressly provided herein, no issue 
by the Company of shares of stock of any class, or securities 
convertible into shares of stock of any class, shall affect, and no 
adjustment by reason thereof shall be made with respect to, the number 
or price of shares of Common Stock subject to an option.

In the event of the proposed dissolution or liquidation of the 
Company, the offering period will terminate immediately prior to the 
consummation of such proposed action, unless otherwise provided by the 
Board.  In the event of a proposed sale of all or substantially all of 
the assets of the Company, or the merger of the Company with or into 
another corporation, each option under the Plan shall be assumed or an 
equivalent option shall be substituted by such successor corporation or 
a parent or subsidiary of such successor corporation (collectively, a 
"Successor"); provided, that if the Successor fails to assume or 
substitute for each option, then the Exercise Date for all Offering 
Periods then in effect shall be the date one day prior to the closing of 
such asset sale or merger and the Plan shall terminate immediately 
thereafter.  If the Exercise Date for options is accelerated pursuant to 
the foregoing sentence, the Board shall notify each participant of such 
acceleration at least ten (10) days prior to the new Exercise Date.

The Board may, if it so determines in the exercise of its sole 
discretion, also make provision for adjusting the Reserves, as well as 
the price per share of Common Stock covered by each outstanding option, 
in the event that the Company effects one or more reorganizations, 
recapitalizations, rights offerings or other increases or reductions of 
shares of its outstanding Common Stock.

20.     Amendment or Termination.  The Board of Directors of the 
Company may at any time amend in any manner or terminate the Plan and 
may terminate any Exercise Period or Offering Period by accelerating the 
date that such Exercise Period or Offering Period shall end.  In 
addition, to the extent necessary to comply with Section 423 of the Code 
(or any successor rule or provision or any other applicable law or 
regulation), the Company shall obtain stockholder approval in such a 
manner and to such a degree as so required.

Without shareholder consent and without regard to whether 
any participant rights may be considered to have been "adversely 
affected," the Board (or its committee) shall be entitled to change the 
Offering Periods and/or Exercise Periods, limit the frequency and/or 
number of changes in the amount withheld during an Offering Period, 
establish the exchange ratio applicable to amounts withheld in a 
currency other than U.S. dollars, permit payroll withholding in excess 
of the amount designated by a participant in order to adjust for delays 
or mistakes in the Company's processing of properly completed 
withholding elections, establish reasonable waiting and adjustment 
periods and/or accounting and crediting procedures to ensure that 
amounts applied toward the purchase of Common Stock for each participant 
properly correspond with amounts withheld from the participant's 
Compensation, and establish such other limitations or procedures as the 
Board (or its committee) determines in its sole discretion advisable 
which are consistent with the Plan.

21.     Notices.  All notices or other communications by a 
participant to the Company under or in connection with the Plan shall be 
deemed to have been duly given when received in the form specified by 
the Company at the location, or by the person, designated by the Company 
for the receipt thereof.


22.     Conditions Upon Issuance of Shares.  Shares shall not be 
issued with respect to an option unless the exercise of such option and 
the issuance and delivery of such shares pursuant thereto shall comply 
with all applicable provisions of law, domestic or foreign, including, 
without limitation, the Securities Act of 1933, as amended, the 
Securities Exchange Act of 1934, as amended, the rules and regulations 
promulgated thereunder, and the requirements of any stock exchange upon 
which the shares may then be listed, and shall be further subject to the 
approval of counsel for the Company with respect to such compliance.

As a condition to the exercise of an option, the Company may 
require the person exercising such option to represent and warrant at 
the time of any such exercise that the shares are being purchased only 
for investment and without any present intention to sell or distribute 
such shares if, in the opinion of counsel for the Company, such a 
representation is required by any of the aforementioned applicable 
provisions of law.

23.     Term of Plan.  The Plan shall become effective upon the 
earlier to occur of its adoption by the Board of Directors or its 
approval by the stockholders of the Company.  It shall continue in 
effect for a term of ten (10) years unless sooner terminated under 
paragraph 20.

        RATIONAL SOFTWARE CORPORATION

        1998 EMPLOYEE STOCK PURCHASE PLAN
        SUBSCRIPTION AGREEMENT


_____ Original Application                              Date:
_____ Change in Payroll Deduction Rate
_____ Change of Beneficiary(ies)


1.      __________________________________ hereby elects to participate in 
the Rational Software Corporation Employee Stock Purchase Plan 
(the "Stock Purchase Plan") and subscribes to purchase shares of 
the Company's Common Stock, without par value, in accordance with 
this Subscription Agreement and the Stock Purchase Plan.

2.      I hereby authorize payroll deductions from each paycheck in the 
amount of _____% (maximum 10%) of my Compensation on each payday 
during the Offering Period in accordance with the Stock Purchase 
Plan, provided, however, that if I am currently participating in 
the Company's 1994 Employee Stock Purchase Plan (the "1994 Plan"), 
then during the First Offering Period (as defined in the Stock 
Purchase Plan) I hereby elect to contribute to the Stock Purchase 
Plan such amount as would otherwise be returned to me in the event 
of a pro rata distribution pursuant to Section 12(a) of the 1994 
Plan on October 30, 1998 in lieu of the foregoing contribution in 
the First Offering Period only.  Such deductions are to continue 
for succeeding Offering Periods until I give written instructions 
for a change in or termination of such deductions.

3.      I understand that said payroll deductions shall be accumulated for 
the purchase of shares of Common Stock, without par value, at the 
applicable purchase price determined in accordance with the Stock 
Purchase Plan.  I further understand that, except as otherwise set 
forth in the Stock Purchase Plan, shares will be purchased for me 
automatically on each Exercise Date of the offering period unless 
I otherwise withdraw from the Stock Purchase Plan by giving 
written notice to the Company for such purpose.

4.      I have received a copy of the complete "Rational Software 
Corporation Employee Stock Purchase Plan."  I understand that my 
participation in the Stock Purchase Plan is in all respects 
subject to the terms of the Plan.  I have been provided with a 
prospectus describing the Stock Purchase Plan.  I understand that 
I may withdraw from the Stock Purchase Plan and have payroll 
deductions refunded (without interest) on the next payroll date 
following notice of withdrawal at any time during the Offering 
Period.

5.      Shares purchased for me under the Stock Purchase Plan should be 
issued in the name(s) of: 


           .


6.      I understand that if I dispose of any shares received by me 
pursuant to the Stock Purchase Plan within 2 years after the 
Offering Date (the first day of the offering period during which I 
purchased such shares) or within one year after the date on which 
such shares were transferred to me, I will be treated for federal 
income tax purposes as having received ordinary income at the time 
of such disposition in an amount equal to the excess of the fair 
market value of the shares at the time such shares were 
transferred to me over the price which I paid for the shares, and 
that I may be required to provide income tax withholding on that 
amount.  I hereby agree to notify the Company in writing within 30 
days after the date of any such disposition.  However, if I 
dispose of such shares at any time after the expiration of the 
two-year and one-year holding periods, I understand that I will be 
treated for federal income tax purposes as having received income 
only at the time of such disposition, and that such income will be 
treated as ordinary income only to the extent of an amount equal 
to the lesser of (1) the excess of the fair market value of the 
shares at the time of such disposition over the purchase price 
which I paid for the shares under the option, or (2) the excess of 
the fair market value of the shares over the option price, 
measured as if the option had been exercised on the Offering Date. 
 The remainder of the gain or loss, if any, recognized on such 
disposition will be treated as capital gain or loss.  The federal 
income tax treatment of ordinary income and capital gain and loss 
is described in the Company's prospectus relating to the Stock 
Purchase Plan.

7.      I hereby agree to be bound by the terms of the Stock Purchase 
Plan.  The effectiveness of this Subscription Agreement is 
dependent upon my eligibility to participate in the Stock Purchase 
Plan.

8.      In the event of my death, I hereby designate the following as my 
beneficiary(ies) to receive all payments and shares due me under 
the Stock Purchase Plan:


NAME:  (Please print)
(First)         (Middle)                (Last)



Relationship

 (Address)


NAME:  (Please print)
(First)         (Middle)                (Last)



Relationship

 (Address)



Employee's Social
Security Number:                                        


Employee's Address:*                                                            






I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT 
THROUGHOUT SUCCESSIVE OFFERING PERIODS UNLESS TERMINATED BY ME.



Dated:
Signature of Employee

*       It is the participant's responsibility to notify the Company's stock 
administrator in the event of a change of address.




<PAGE>


                                                           Exhibit 5.1
January 22, 1999

Rational Software Corporation
18880 Homestead Road
Cupertino, CA 95014

Re:     Registration Statement on Form S-8 

Ladies and Gentlemen:

We have examined the Registration Statement on Form S-8 to be filed by 
you with the Securities and Exchange Commission on or about January 22, 
1999 (the "Registration Statement") in connection with the registration 
under the Securities Act of 1933, as amended, of the 1998 Employee 
Stock Purchase Plan (as to 191,261 shares) (the "1998 ESPP" and the 
"Shares" as appropriate).  As your legal counsel, we have examined the 
proceedings taken and are familiar with the proceedings proposed to be 
taken by you in connection with the issuance and sale of the Shares 
pursuant to the 1998 ESPP.  In addition, for purposes of this opinion 
we have assumed that the consideration received by the Company in 
connection with each issuance of the Shares will include an amount in 
the form of cash, services rendered or property that exceeds the 
greater of (i) the aggregate par value of such Shares or (ii) the 
portion of such consideration determined by the Company's Board of 
Directors to be "capital" for purposes of the Delaware General 
Corporation Law.

It is our opinion that the Shares, when issued and sold in the manner 
described in the 1998 ESPP and pursuant to the agreement that 
accompanies each grant under the 1998 ESPP, will be legally and validly 
issued, fully-paid and non-assessable.

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 and any amendments thereto.

Very truly yours,

WILSON SONSINI GOODRICH & ROSATI
Professional Corporation


/s/ Wilson Sonsini Goodrich & Rosati




                                                            Exhibit 23.1
CONSENT OF ERNST & YOUNG L.L.P., INDEPENDENT AUDITORS

        We consent to the incorporation by reference in the Registration 
Statement (Form S-8) pertaining to the 1998 Employee Stock Purchase 
Plan of Rational Software Corporation of our reports dated April 21, 
1998, except for Note Fifteen, as to which the date is April 23, 1998, 
with respect to the consolidated financial statements of Rational 
Software Corporation included in its Annual Report (Form 10-K) for the 
year ended March 31, 1998 and the related financial statement schedule 
included herein, filed with the Securities and Exchange Commission.

                                         /s/ Ernst & Young L.L.P.


Palo Alto, California
January 15, 1999




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