UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

(Mark One)

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended December 31, 2002 or

[ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ________to _________

Commission file number 0-12167

RATIONAL SOFTWARE CORPORATION
(Exact name of registrant as specified in its charter)

Delaware	54-1217099
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

18880 Homestead Road
Cupertino, California 95014
(Address of principal executive offices including zip code)

408-863-9900
(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file reports), and (2) has been subject to such filing requirements for the past 90 days. YES [X] NO [ ],

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act). YES [X] NO [ ],

Indicate the number of shares outstanding of each of the issuer's classes of common stock as of the latest practicable date.

Class	Shares Outstanding on January 31, 2003
Common Stock, par value $.01 per share	195,782,830

RATIONAL SOFTWARE CORPORATION
TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION	Page No.

Item 1 - Financial Statements (Unaudited):

Condensed Consolidated Balance Sheets	3

Condensed Consolidated Statements of Operations	4

Condensed Consolidated Statements of Cash Flows	5

Notes to Condensed Consolidated Financial Statements	6

Item 2 - Management's Discussion and Analysis of Financial Condition and Results of Operations	15

Item 3 - Quantitative and Qualitative Disclosures about Market Risk	28

Item 4 - Controls and Procedures	28

PART II - OTHER INFORMATION

Item 1 - Legal Proceedings	29

Item 5 - Other Information	29

Item 6 - Exhibits and Reports on Form 8-K	29

SIGNATURES	31

CERTIFICATIONS	32

PART I - FINANCIAL INFORMATION

ITEM 1 - Financial Statements

RATIONAL SOFTWARE CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(in thousands, except per share amounts)

                                                                                        
                                                              December 31,     March 31,
                                                                  2002          2002
                                                              ------------  ------------
                                                              (unaudited)
                         ASSETS
            -------------------------------------
Current assets:
 Cash and cash equivalents.................................. $    424,016  $    374,158
 Short-term investments.....................................      621,133       586,225
 Accounts receivable, net of allowance for
   doubtful accounts of $5,269 at December 31,
   2002 and $6,149 at March 31, 2002........................      126,466       149,896
 Deferred income tax assets.................................       19,714        19,714
 Prepaid expenses and other assets..........................       18,316        24,525
                                                              ------------  ------------
        Total current assets................................    1,209,645     1,154,518
                                                              ------------  ------------
Property and equipment, at cost:
 Computer and office equipment..............................      147,188       136,048
 Office furniture...........................................       28,777        27,704
 Leasehold improvements.....................................       32,682        31,129
                                                              ------------  ------------
                                                                  208,647       194,881
 Accumulated depreciation and amortization..................     (128,993)     (103,627)
                                                              ------------  ------------
Property and equipment, net.................................       79,654        91,254
Goodwill, net...............................................      196,329       185,694
Intangible assets, net......................................       37,915        42,336
Other assets, net...........................................       31,832        29,417
                                                              ------------  ------------
        Total assets........................................ $  1,555,375  $  1,503,219
                                                              ============  ============

             LIABILITIES AND STOCKHOLDERS' EQUITY
            -------------------------------------
Current liabilities:
 Accounts payable........................................... $     10,067  $     11,575
 Accrued employee benefits..................................       41,581        46,145
 Income taxes payable.......................................       29,579        29,192
 Other accrued expenses.....................................       52,998        42,445
 Current portion of accrued merger and integration costs....       11,382        11,511
 Deferred revenue...........................................      179,525       181,903
                                                              ------------  ------------
        Total current liabilities...........................      325,132       322,771

Convertible subordinated notes..............................      500,000       500,000
Long-term portion of accrued merger and integration
  costs.....................................................       25,093        29,369
Other accrued  liabilities..................................        1,671        13,103
                                                              ------------  ------------
        Total liabilities...................................      851,896       865,243
                                                              ------------  ------------

Stockholders' equity:
 Common stock, $0.01 par value, 500,000
  shares authorized.........................................        2,224         2,196
 Additional paid-in capital.................................    1,290,775     1,272,174
 Deferred stock compensation................................     (147,182)     (199,055)
 Treasury stock.............................................     (362,371)     (350,902)
 Accumulated deficit........................................      (93,908)      (64,503)
 Accumulated other comprehensive income (loss)..............       13,941       (21,934)
                                                              ------------  ------------
        Total stockholders' equity..........................      703,479       637,976
                                                              ------------  ------------
        Total liabilities and stockholders' equity.......... $  1,555,375  $  1,503,219
                                                              ============  ============

See accompanying notes to condensed consolidated financial statements.

RATIONAL SOFTWARE CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except per share amounts, unaudited)


                                              Three Months Ended     Nine Months Ended
                                                  December 31,          December 31,
                                              --------------------  --------------------
                                                2002       2001       2002       2001
                                              ---------  ---------  ---------  --------- 
Net product revenues........................ $  64,768  $  77,466    185,166  $ 232,489
Consulting and support revenues.............    97,155     92,685    283,740    277,189
                                              ---------  ---------  ---------  ---------
    Total revenues..........................   161,923    170,151    468,906    509,678
                                              ---------  ---------  ---------  ---------

Cost of product revenues....................    12,159     11,881     32,879     31,937
Cost of consulting and support
  revenues..................................    18,286     19,513     53,586     58,691
                                              ---------  ---------  ---------  ---------
    Total cost of revenues..................    30,445     31,394     86,465     90,628
                                              ---------  ---------  ---------  ---------
Gross margin................................   131,478    138,757    382,441    419,050
                                              ---------  ---------  ---------  ---------
Operating expenses:
  Research and development expenses.........    40,744     42,581    123,764    133,487
  Sales and marketing expenses..............    69,527     71,531    208,298    217,344
  General and administrative expenses.......    11,893     13,694     34,472     40,059
  Amortization of goodwill and
   purchased intangibles....................       330     18,019        967     54,113
  Amortization of deferred stock-based
   compensation.............................    18,578     18,071     55,165     54,273
  Charges for accquired in-process
   research and development.................       ---        ---      4,524        ---
  Restructuring and other charges...........       ---        ---     12,382     17,331
                                              ---------  ---------  ---------  ---------
        Total operating expenses............   141,072    163,896    439,572    516,607
                                              ---------  ---------  ---------  ---------
Operating loss..............................    (9,594)   (25,139)   (57,131)   (97,557)
Other income, net...........................       570      3,235      4,059     14,284
                                              ---------  ---------  ---------  ---------
        Loss before income taxes............    (9,024)   (21,904)   (53,072)   (83,273)

Benefit from income taxes...................    (5,466)    (4,046)   (23,667)   (18,977)
                                              ---------  ---------  ---------  ---------
Net loss.................................... $  (3,558) $ (17,858)   (29,405) $ (64,296)
                                              =========  =========  =========  =========
Net loss per common share:
  Basic..................................... $   (0.02) $   (0.09)     (0.15) $   (0.33)
                                              =========  =========  =========  =========
  Diluted................................... $   (0.02) $   (0.09)     (0.15) $   (0.33)
                                              =========  =========  =========  =========
Shares used in computing per share amounts:
  Basic.....................................   191,326    189,907    190,489    193,988
                                              =========  =========  =========  =========
  Diluted...................................   191,326    189,907    190,489    193,988
                                              =========  =========  =========  =========

See accompanying notes to condensed consolidated financial statements.

RATIONAL SOFTWARE CORPORATION
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
(in thousands, unaudited)

                                                                               
                                                            Nine  Months Ended
                                                                December 31
                                                           ---------- ---------
                                                             2002       2001
                                                           ---------  ---------
Cash Flows From Operating activities:                                          
   Net loss.............................................. $ (29,405) $ (64,296)
   Adjustments to reconcile net loss to net
   cash provided by operating activities:
     Charges for acquired in-process
       research and development..........................     4,524        ---
     Depreciation and amortization.......................    44,958     93,340
     Compensation expense related to stock options.......    55,165     54,273
     Tax benefit from employee stock plans...............     1,003      4,780
     Deferred income tax.................................   (22,490)   (33,145)
     Changes in operating assets and liabilities:
       Accounts receivable, net..........................    23,473     60,047
       Prepaid expenses and other, net...................     6,209     (4,504)
       Other assets......................................     2,598     (2,813)
       Accounts payable..................................    (1,566)   (12,906)
       Accrued employee benefits and other accrued
          expenses.......................................     4,590    (29,269)
       Income taxes payable..............................       387     (4,070)
       Accrued merger and integration expenses...........    (4,797)    (6,176)
       Deferred revenues.................................    (2,520)     3,630
                                                           ---------  ---------
Net cash provided by operating activities................    82,129     58,891
                                                           ---------  ---------
Cash Flows From Investing activities:                                          
   Purchases of short-term investments...................  (430,228)  (529,479)
   Maturities and sales of short-term investments........   397,941    578,434
   Purchases of property and equipment...................   (15,256)   (16,872)
   Purchases of technologies.............................       ---    (20,965)
   Business combinations, net of cash acquired              (21,894)       ---
                                                           ---------  ---------
Net cash provided by (used in) investing activities......   (69,437)    11,118
                                                           ---------  ---------
Cash Flows From Financing activities:                                          
   Net proceeds from issuance of common stock............    16,096     22,360
   Net proceeds from reissuance of treasury stock........     4,072     10,263
   Repurchases of common stock...........................   (17,303)  (139,925)
   Repayment of receivables from stockholders............       ---        633
                                                           ---------  ---------
Net cash provided by (used in) financing activities......     2,865   (106,669)
                                                           ---------  ---------

Effect of changes in foreign currency
  exchange rates on cash.................................    34,301      1,824
                                                           ---------  ---------
Net increase (decrease) in cash and cash equivalents.....    49,858    (34,836)
Cash and cash equivalents at beginning of period.........   374,158    363,717
                                                           ---------  ---------
Cash and cash equivalents at end of period............... $ 424,016  $ 328,881
                                                           =========  =========

See accompanying notes to condensed consolidated financial statements.

RATIONAL SOFTWARE CORPORATION
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

BASIS OF PRESENTATION
- The condensed consolidated financial statements have been prepared without an audit and in accordance with the Company's accounting policies, as described in its latest Annual Report on Form 10-K filed with the Securities and Exchange Commission, and include the consolidated accounts of the Company and its subsidiaries. In the opinion of management, all adjustments, which consist only of normal recurring adjustments necessary for a fair presentation of the Company's financial position, results of operations and cash flows for the interim periods presented, have been made. Certain prior year amounts have been reclassified to conform to current year presentation. As permitted by Form 10-Q, certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted. These statements should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended March 31, 2002. The results of operations for the interim periods presented are not necessarily indicative of the results that may be expected for any subsequent interim period or the fiscal year ending March 31, 2003.

NET LOSS PER COMMON SHARE
- The following table sets forth the computation of basic and diluted net loss per share (in thousands, except per share amounts):

                                                                                         
                                                Three Months Ended    Nine Months Ended
                                                  December 31,          December 31,
                                              --------------------  --------------------
                                                2002       2001       2002       2001
                                              ---------  ---------  ---------  ---------
Numerator:                                                                               
  Net loss                                   $  (3,558) $ (17,858) $ (29,405) $ (64,296)
                                              =========  =========  =========  ========= 
Denominator:                                                                             
  Weighted average shares of common
    stock outstanding                          194,877    193,980    194,030    198,326

  Less: Weighted average shares subject
    to repurchase                               (3,551)    (4,073)    (3,541)    (4,338)
                                              ---------  ---------  ---------  ---------
  Denominator for basic and diluted
    net loss per share -
    weighted average shares                    191,326    189,907    190,489    193,988
                                              =========  =========  =========  =========

Net loss per share - basic                   $   (0.02) $   (0.09) $   (0.15) $   (0.33)
                                              =========  =========  =========  =========
Net loss per share - diluted                 $   (0.02) $   (0.09) $   (0.15) $   (0.33)
                                              =========  =========  =========  =========

The computation of diluted net loss per share for the quarter ended December 31, 2002 excluded the impact of all outstanding options to purchase 55,593,911 shares of Common Stock and 3,550,791 shares of Common Stock subject to repurchase, as the impact would be antidilutive. The computation of diluted net loss per share for the quarter ended December 31, 2001 excluded the impact of all outstanding options to purchase 45,503,656 shares of Common Stock and 4,072,610 shares of Common Stock subject to repurchase, as the impact would be antidilutive.

The computation of diluted net loss per share for the nine months ended December 31, 2002 excluded the impact of all outstanding options to purchase 56,163,514 shares of Common Stock and 3,541,040 shares of Common Stock subject to repurchase, as the impact would be antidilutive. The computation of diluted net loss per share for the nine months ended December 31, 2001 excluded the impact of all outstanding options to purchase 44,010,033 shares of Common Stock and 4,338,270 shares of Common Stock subject to repurchase, as the impact would be antidilutive.

The impact of converting 13,997,760 shares of Common Stock from outstanding Convertible Notes issued in 2000 was not included for any periods in diluted net loss per share, because the assumed conversion would be antidilutive.

COMPREHENSIVE INCOME (LOSS)
- The Company follows Statement of Financial Accounting Standards (SFAS) No. 130, "Reporting Comprehensive Income." SFAS 130 requires unrealized gains or losses on the Company's available-for-sale securities and foreign translation adjustments, which have been included in stockholders' equity and excluded from net income, to be included in comprehensive income. For the three months ended December 31, 2002, total comprehensive income was approximately $11.8 million compared to comprehensive loss of approximately $6.1 million for the same period last year. For the nine months ended December 31, 2002, total comprehensive income was approximately $6.5 million compared to comprehensive loss of approximately $41.2 million for the same period last year.

RECENT PRONOUNCEMENTS -
On April 1, 2002, the Company adopted SFAS 141, "Business Combinations," and SFAS 142, "Goodwill and Other Intangible Assets." SFAS 141 requires all business combinations initiated after June 30, 2001 to be accounted for using the purchase method of accounting. As required by SFAS 142, the Company discontinued amortizing the remaining balances of goodwill beginning April 1, 2002. All remaining and future acquired goodwill will be subject to impairment tests annually, or earlier if indicators of potential impairment exist, using a fair-value-based approach. All other intangible assets will continue to be amortized over their estimated useful lives and assessed for impairment under SFAS 144, "Accounting for the Impairment or Disposal of Long-Lived Assets." Upon adoption of the new business combination rules under SFAS 141, assembled workforce no longer meets the definition of an identifiable intangible asset. As a result, the net balance of $3.1 million has been reclassified to goodwill in the first quarter of fiscal 2003. See further discussion under Note 8 "Goodwill and Other Intangible Assets." In connection with the transitional goodwill impairment evaluation under SFAS 142, the Company has completed a goodwill review as of the date of adoption - April 1, 2002 and found no impairment.

In October 2001, the Financial Accounting Standards Board (FASB) issued SFAS 144, "Accounting for the Impairment or Disposal of Long-Lived Assets," which supersedes SFAS 121 and the provisions of Accounting Principles Board (APB) Opinion No. 30, "Reporting the Results of Operations - Reporting the Effects of Disposal of a Segment of a Business, and Extraordinary, Unusual and Infrequently Occurring Events and Transactions" with regard to reporting the effects of a disposal of a segment of a business. SFAS 144 retains many of the provisions of SFAS 121 but significantly changes the criteria that would have to be met to classify an asset as held for disposal such that long-lived assets to be disposed of other than by sale are considered held and used until disposed of. In addition, SFAS 144 retains the basic provisions of APB 30 for presentation of discontinued operations in the statement of operations but broadens that presentation to a component of an entity. The Company adopted SFAS 144 on April 1, 2002. The adoption of SFAS 144 did not have material impact on the Company's financial position and results of operations.

In November 2001, the FASB issued an announcement on the topic of "Income Statement Characterization of Reimbursements Received for Out of Pocket Expenses Incurred" (the Announcement). The Announcement requires companies to characterize reimbursements received for out of pocket expenses incurred as revenues in the income statement. The Company adopted the Announcement in the quarter ended March 31, 2002. Historically, the Company has netted reimbursements received for out of pocket expenses against the related expenses in the accompanying consolidated statements of operations. The adoption of the Announcement had no impact on the Company's gross margin or net loss but increased its consulting and support revenues and cost of consulting and support revenues by approximately $419,000 for the nine months ended December 31, 2002. The adoption of the Announcement did not have a material impact on the Company's financial position, results of operations or cash flows and, accordingly, the Company did not reclassify prior period results.

In June 2002, the FASB issued SFAS 146, "Accounting for Costs Associated with Exit or Disposal Activities," which addresses accounting for restructuring and similar costs. SFAS 146 supersedes previous accounting guidance, principally Emerging Issues Task Force Issue (EITF) No. 94-3, "Liability Recognition for Certain Employee Termination Benefits and Other Costs to Exit an Activity." The Company will adopt the provisions of SFAS 146 for restructuring activities initiated after December 31, 2002. SFAS 146 requires that the liability for costs associated with an exit or disposal activity be recognized when the liability is incurred. Under EITF 94-3, a liability for an exit cost was recognized at the date of the Company's commitment to an exit plan. SFAS 146 also establishes that the liability should initially be measured and recorded at fair value. Accordingly, SFAS No. 146 may affect the timing of recognizing future restructuring costs as well as the amounts recognized.

In November 2002, the FASB issued FASB Interpretation (FIN) No. 45, "Guarantor's Accounting and Disclosure Requirements for Guarantees, Including Indirect Guarantess of Indebtedness of Others, an

interpretation of FASB Statements 5, 57 and 107 and Rescission of FASB Interpretation 34." FIN 45 clarifies the requirements of SFAS No. 5, "Accounting for Contingencies," relating to the guarantor's accounting for, and disclosure of, the issuance of certain types of guarantees. The disclosure provisions of FIN 45 are effective for financial statements of interim or annual periods that end after December 15, 2002 and the provisions for initial recognition and measurement are effective on a prospective basis for guarantees that are issued or modified after December 31, 2002, irrespective of a guarantor's year-end. The Company adopted the disclosure provision of FIN 45 in the quarter ended December 31, 2002. The Company has letters of credit and other guarantees to secure rental payments at its various office locations. The term of the guarantee is equal to the term of the related facility lease, which can be from 30 days to 10 years. The maximum potential amount of future payments the Company could be required to make under its guarantees at December 31, 2002 is approximately $6.5 million. In addition, under the indemnification of the Company's standard product license agreement, the Company guarantees to pay all damages and costs (other than costs of customers' retained counsel or the value of the services of the customers' employees) associated with the license infringements on any patent, copyright, trademark, trade secret or other interlectual property right on products licensed to its customers. The infringement liability is covered under the Company's liability insurance. The Company does not expect to incur any infringement liability as a result of the customer indemnification clauses as of December 31, 2002.

On December 31, 2002, the FASB issued SFAS 148, "Accounting for Stock-Based Compensation - Transition and Disclosure." This statement amends SFAS 123, "Accounting for Stock-Based Compensation," to provide alternative methods of transition for an entity that voluntarily changes to the fair value based method of accounting for stock-based employee compensation. It also amends the disclosure provisions of that statement to require prominent disclosure about the effects on reported net income of an entity's accounting policy decisions with respect to stock-based employee compensation. Finally, this statement amends APB Opinion No. 28, "Interim Financial Reporting," to require disclosure about those effects in interim financial statements. The amendment of the transition and annual disclosure requirements of SFAS 123 are effective for fiscal years ending after December 15, 2002. The amendment of the disclosure requirements of APB Opinion No. 28 is effective for financial reports containing condensed consolidated financial statements for interim periods beginning after December 15, 2002. Since the Company does not anticipate changing to the fair value based method of accounting for stock-based employee compensation, the transition provisions of SFAS 148 is not expected to have a significant impact on its financial position, results of operations or cash flows.

DERIVATIVE FINANCIAL INSTRUMENTS -
The Company adopted SFAS 133, "Accounting for Derivative Instruments and Hedging Activities," as amended by SFAS 137 and SFAS 138, in the first quarter of fiscal 2002. SFAS 133 establishes new standards of accounting and reporting for derivative instruments and hedging activities, and requires that all derivatives, including foreign currency exchange contracts, be recognized on the balance sheet at fair value. Changes in the fair value of derivatives that do not qualify for hedge treatment, as well as the ineffective portion of any hedges, must be recognized currently in earnings. All of the Company's derivative financial instruments are recorded at their fair value in prepaid expenses and other assets. The transition adjustment upon adoption of SFAS 133 was not material.

The Company conducts business in a number of foreign countries, with certain transactions denominated in local or "functional" currencies. The purpose of the Company's foreign currency management is to mitigate the impact of foreign currency exchange rate fluctuations on balance sheet exposures denominated in currencies other than the "functional" currency. The terms of currency instruments used for hedging purposes are generally consistent with the timing of the committed transactions being hedged. The Company does not use derivative financial instruments for speculative trading purposes, nor does it hold or issue leveraged derivative financial instruments.

The Company uses short-term forward exchange

contracts to hedge certain foreign currency denominated assets or liabilities. These derivatives do not qualify for SFAS 133 hedge accounting treatment. Accordingly, changes in the fair value of these hedges are recorded immediately in earnings to offset the changes in the fair value of the assets or liabilities being hedged.

STOCK REPURCHASE -
In April 2001, the Company's Board of Directors authorized the repurchase of 20.0 million shares of the Company's Common Stock from time to time in the open market. The Company repurchased 1.5 million shares of its Common Stock for total cash outlay of approximately $17.3 million for the nine months ended December 31, 2002. As of December 31, 2002, the Company had repurchased

approximately 9.7 million shares of its Common Stock under this program for an aggregate cost of approximately $113.0 million. Repurchases help offset dilution from stock issued under the Company's stock option and stock purchase plans. The timing and size of any future stock repurchases are subject to market conditions, stock prices, the Company's cash position and other cash requirements going forward.

ACQUISITION -
On July 22, 2002, the Company completed the acquisition of NeuVis Inc. (NeuVis). The results of NeuVis' operations have been included in the consolidated financial statements since that date. NeuVis was a privately held provider of an e-business Rapid Application Development (RAD) platform for agile, enterprise-class applications. As a result of the acquisition, the technology of NeuVis will assist the Company's current products to support the major industry Integrated Development Environments (IDEs), such as those from Microsoft Corporation (Microsoft) and International Business Machines Corporation (IBM). Under the terms of the agreement and plan of reorganization, the Company acquired 100% of the outstanding shares of capital stock of NeuVis in exchange for approximately $22.0 million of cash, $2.3 million in assumed net liabilities and transaction related costs, and 707,876 shares of the Company's restricted Common Stock valued at $5.9 million. The value of the shares issued was determined based on the average market price of the Company's Common Stock over the ten-day period ending two days prior to the closing date of the acquisition.

The total purchase price of NeuVis was approximately $30.2 million and was allocated based on an independent appraisal as follows (in thousands):

Acquired developed technology                 $  11,998
Acquired in-process research and development
  (IPR&D)                                         4,524
Acquired goodwill                                10,634
Deferred stock-based compensation on unvested
  restricted Common Stock                         5,932
Net deferred tax liability                       (2,907)
                                               ---------
  Total purchase price                        $  30,181
                                               =========

The purchase price allocation resulted in a $4.5 million charge related to the value of acquired IPR&D in the quarter ended September 30, 2002. The value of acquired IPR&D represents the appraised value of technology in the development stage that had not yet reached economic and technological feasibility. In reaching this determination, the Company used a present value net income approach, which computed the fair value of the subject asset based on a discounted cash flow analysis rate on the anticipated income stream of the related product revenues and considered, among other factors, the stage of development of each product, the time and resources needed to complete each product, and expected income and associated risks. The Company also used the present value net income method to allocate values to developed technology. The rates utilized to discount the cash flows to their present value were based on an estimated weighted average cost of capital calculation. Due to the nature of the forecast and the risks associated with the projected growth and profitability of the developmental projects, discount rates of 30% and 20% were considered appropriate for IPR&D and developed technology, respectively. The deferred stock-based compensation, which relates to the intrinsic value of unvested restricted stock issued in the acquisition, is presented as a reduction of stockholders' equity and is being amortized over the two-year vesting period using the straight-line method. The acquired developed technology is being amortized on a straight-line basis over a period of three years, which is the estimated useful life of the acquired technology. The $10.6 million of acquired goodwill will not be amortized but rather subject to impairment reviews annually or earlier if indicators of potential impairment exist. The acquired goodwill is not expected to be deductible for tax purposes.

The Company incorporated a plan effective at the date of the acquisition with respect to involuntary termination of certain NeuVis employees whose responsibilities were redundant or not deemed necessary. The plan was initiated and completed as of September 30, 2002. Total severance pay of approximately $0.7 million was included in the purchase price allocation.

The following table presents unaudited pro forma consolidated results for the Company assuming the acquisition of NeuVis had been consummated on April 1, 2001. The pro forma results have been adjusted to exclude the charges for IPR&D recorded in the second quarter of fiscal 2003 and include amortization of deferred stock-based compensation and amortization of purchased intangibles. This information may not necessarily be indicative of the future combined results of operations of the Company (in thousands, except per share amounts).

                                                                                       
                                                 Three Months Ended       Nine Months Ended
                                                     December 31,             December 31,
                                               -----------------------  --------------------
                                                 2002         2001        2002       2001
                                               ---------  ------------  ---------  ---------
                                                                                            
Revenues                                      $ 161,923  $    170,375  $ 468,957  $ 510,426
Net loss                                         (3,558)      (19,356)   (37,674)   (76,243)
Basic and diluted net loss per share              (0.02)        (0.10)     (0.20)     (0.39)

GOODWILL AND OTHER INTANGIBLE ASSETS -
On April 1, 2002, the Company adopted SFAS 142 and as a result will no longer amortize goodwill, but will test it for impairment annually or earlier if indicators of potential impairment exist.

For comparative purposes, the pro forma adjusted net loss per share excluding amortization of goodwill and assembled workforce is as follows (in thousands, except per share amounts):

                                                                                              
                                                Three Months Ended         Nine Months Ended
                                                  December 31,               December 31,
                                              -------------------------  ---------------------
                                                  2002          2001        2002       2001
                                              -------------  ----------  ----------  ---------
                                                                                              
Net loss                                     $      (3,558) $  (17,858) $  (29,405) $ (64,296)
Add back SFAS 142 adjustments:
  Amortization of goodwill, net of tax                 ---      16,691         ---     50,306
  Amortization of assembled workforce,
    net of tax                                         ---         545         ---      1,639
                                              -------------  ----------  ----------  ---------
Adjusted net loss                            $      (3,558) $     (622) $  (29,405) $ (12,351)
                                              =============  ==========  ==========  =========

Basic and diluted net loss per share         $       (0.02) $    (0.09) $    (0.15) $   (0.33)
Add back SFAS 142 adjustments:
  Amortization of goodwill, net of tax                 ---        0.09         ---       0.26
  Amortization of assembled workforce,
    net of tax                                         ---         ---         ---       0.01
                                              -------------  ----------  ----------  ---------
Pro forma adjusted basic and diluted
  net loss per share                         $       (0.02) $      ---  $    (0.15) $   (0.06)
                                              =============  ==========  ==========  =========

                                                                                 
                                                      Fiscal Years Ended
                                                           March 31,
                                              -----------------------------------
                                                 2002         2001        2000
                                              -----------  ----------  ----------
                                                                                 
Net income (loss)                            $   (75,948) $   72,144  $   85,314
Add back SFAS 142 adjustments:
  Amortization of goodwill, net of tax            66,981      21,641       3,900
  Amortization of assembled workforce,
    net of tax                                     2,184         552          71
                                              -----------  ----------  ----------
Adjusted net income (loss)                   $    (6,783) $   94,337  $   89,285
                                              ===========  ==========  ==========

Basic  net income (loss) per share           $     (0.39) $     0.38  $     0.49
Add back SFAS 142 adjustments:
  Amortization of goodwill, net of tax              0.34        0.12        0.02
  Amortization of assembled workforce,
    net of tax                                      0.01         ---         ---
                                              -----------  ----------  ----------
Pro forma adjusted basic net income (loss)
  per share                                  $     (0.04) $     0.50  $     0.51
                                              ===========  ==========  ==========

Diluted net income (loss) per share          $     (0.39) $     0.35  $     0.45
Add back SFAS 142 adjustments:
  Amortization of goodwill, net of tax              0.34        0.11        0.02
  Amortization of assembled workforce,
    net of tax                                      0.01         ---         ---
                                              -----------  ----------  ----------
Pro forma adjusted diluted net income (loss)
  per share                                  $     (0.04) $     0.46  $     0.47
                                              ===========  ==========  ==========

The following table provides a summary of the carrying amount of goodwill which includes amounts originally allocated to assembled workforce (in thousands):

                                                                         

                                              December 31,   March 31,
                                                  2002          2002
                                              -------------  ----------
                                                                         
Gross carrying amount of goodwill            $     293,187  $  274,727
Gross carrying amount of assembled workforce
  reclassified to goodwill                             ---       7,825
                                              -------------  ----------
Adjusted gross carrying amount
  of goodwill                                      293,187     282,552
Accumulated amortization of goodwill               (96,858)    (92,103)
Accumulated amortization of assembled
  workforce reclassified to goodwill                   ---      (4,755)
                                              -------------  ----------
Net carrying amount of goodwill              $     196,329  $  185,694
                                              =============  ==========

The following tables provide a summary of the carrying amount of other intangible assets that will continue to be amortized and excludes amounts originally allocated to assembled workforce (in thousands):

                                                                                   
                                                           December 31, 2002
                                              -------------------------------------
                                                  Gross                     Net
                                                Carrying     Accumulated  Carrying
                                                 Amount      Amortization  Amount
                                              -------------  ----------  ----------
Acquired developed and core technology       $      64,713  $  (31,939) $   32,774
Acquired contract                                    9,299      (5,941)      3,358
Acquired customer list and trade name                3,989      (2,206)      1,783
                                              -------------  ----------  ----------
   Total                                     $      78,001  $  (40,086) $   37,915
                                              =============  ==========  ==========

                                                                                 
                                                           March 31, 2002
                                              -----------------------------------
                                                 Gross                    Net
                                               Carrying    Accumulated  Carrying
                                                Amount     Amortization  Amount
                                              -----------  ----------  ----------
Acquired developed and core technology       $    52,714  $  (18,776) $   33,938
Acquired contract                                  9,299      (3,616)      5,683
Acquired customer list and trade name              3,989      (1,274)      2,715
                                              -----------  ----------  ----------
   Total                                     $    66,002  $  (23,666) $   42,336
                                              ===========  ==========  ==========

Amortization expense (before tax) related to intangible assets was approximately $5.9 million and $6.2 million for the three-month periods ended December 31, 2002 and 2001, respectively. Amortization expense (before tax) related to intangible assets was approximately $16.4 million and $17.6 million for the nine-month periods ended December 31, 2002 and 2001, respectively.

The total expected future amortization related to other intangible assets is provided in the table below (in thousands):

                                                                         
                                                  Future Amortization
                                              -------------------------
                                                               Net of
                                                  Gross      Estimated
                Fiscal Year                      Amount      Tax Benefit
               -------------                  -------------  ----------
                                                                         
Remainder of 2003 (3 months)                 $       5,920  $    3,552
2004                                                21,359      12,815
2005                                                 8,288       4,973
2006                                                 2,348       1,409
                                              -------------  ----------
  Total                                      $      37,915  $   22,749
                                              =============  ==========

RESTRUCTURING AND OTHER CHARGES

Fiscal 2003 restructuring and other charges

In July 2002, the Company announced a restructuring program related to the cessation of selected development activities associated with the Company's hosted development services. The restructuring included a workforce reduction, impairment of unused software, and termination of third party contracts. As a result of the restructuring program, the Company recorded approximately $4.1 million of restructuring related charges, which were classified within operating expenses in the quarter ended September 30, 2002. The restructuring program resulted in the reduction of 47 employees within the hosted development services group. The workforce reductions started in July 2002 and the employment of a majority of the affected employees was terminated as of December 31, 2002. The Company recorded a workforce reduction charge of approximately $1.3 million primarily relating to severance and fringe benefits. As a result of the restructuring program, certain software in the hosted development services will have no future value as the Company has discontinued related development activities. The Company recorded a restructuring charge of approximately $0.5 million relating to the impairment of these assets. The Company also recorded a charge of approximately $2.3 million relating to payments to third parties to terminate contractual agreements associated with the hosted development services.

A summary of these restructuring costs is outlined as follows (in thousands):

                                                                                
                                                         Termination
                                           Impairment of   of Other
                                Workforce     Unused     Third-Party
                                Reduction    Software     Agreements     Total
                                ---------  ------------  ------------  ---------
Provision recorded at
  restructuring                $   1,328  $        458  $      2,342  $   4,128
Non-cash charges                     ---          (458)         (442)      (900)
Cash payments                       (872)          ---        (1,602)    (2,474)
                                ---------  ------------  ------------  ---------
Balance, September 30, 2002          456           ---           298        754
Cash payments                       (161)          ---          (261)      (422)
                                ---------  ------------  ------------  ---------
Balance, December 31, 2002     $     295  $        ---  $         37  $     332
                                =========  ============  ============  =========

The Company had substantially completed the implementation of this restructuring program as of December 31, 2002. Remaining cash expenditures will be paid through March 2003.

In addition, in the quarter ended September 30, 2002, the Company recorded an increase of $6.1 million in other charges as a result of updating the Company's estimates associated with unused facilities related to merger and integration activities and other facilities commitments previously provided for. This adjustment reflects the continued weakness in lease rates and sublease activities, which resulted in changes regarding estimated vacancy periods and sublease income. The Company anticipates that it will take approximately 15 to 19 months to sublease the remaining vacated properties. A summary of this charge is outlined as follows (in thousands):


                                Facility
                                 Related
                                 Charges
                                --------- 
Provision recorded at
  September 30, 2002           $   6,091
Cash payments                       (411)
                                ---------
Balance, December 31, 2002     $   5,680
                                =========

Amounts related to the lease expense, net of anticipated sublease proceeds, will be paid over the respective lease terms through fiscal 2012. The Company estimated additional lease costs for unused facilities based on currently available commercial rates. The actual loss incurred on these facilities could exceed the Company's estimates.

Fiscal 2002 restructuring and other charges

In April 2001, the Company announced a restructuring program to focus

the Company's efforts towards concentrating on its strongest opportunities, reducing operating expenses, and improving allocation of resources. The restructuring included a worldwide workforce reduction, consolidation of excess facilities and restructuring of certain business functions. As a result of the restructuring program, the Company recorded restructuring costs of approximately $17.3 million, which were classified within operating expenses in the quarter ended June 30, 2001. The restructuring program resulted in the reduction of approximately 500 employees across all business functions and geographic regions. The worldwide workforce reductions started in April 2001 and employees were terminated in the quarter ended June 30, 2001. The Company recorded a workforce reduction charge of approximately $10.1 million relating primarily to severance and fringe benefits. The consolidation of excess facilities included the closure of certain corporate facilities and sales offices related to business activities that have been exited. The Company recorded a restructuring charge of approximately $3.7 million for excess facilities relating primarily to lease termination fees and non-cancelable lease costs. The Company also recorded other charges of approximately $3.5 million relating primarily to payments to third parties to terminate contractual agreements as a result of the restructuring program. In the quarter ended September 30, 2002, the Company recorded an increase of $2.2 million relating to the consolidation of excess facilities, as a result of updating the Company's estimates associated with unused facilities. This adjustment reflects the continued weakness in lease rates and sublease activities, which resulted in changes regarding estimated vacancy periods and sublease income. The Company anticipates that it will take approximately 7 to 15 months to sublease the remaining vacated properties.

A summary of these restructuring costs is outlined as follows (in thousands):


                                                         Termination
                                           Consolidation   of Other
                                Workforce   of Excess    Third-Party
                                Reduction   Facilities    Agreements     Total
                                ---------  ------------  ------------  ---------
Provision recorded at
  restructuring                $  10,149  $      3,719  $      3,463  $  17,331
Non-cash charges                     ---           ---          (856)      (856)
Cash payments                     (9,912)       (1,268)       (2,607)   (13,787)
                                ---------  ------------  ------------  ---------
Balance, March 31, 2002              237         2,451           ---      2,688
Cash payments                       (224)         (559)          ---       (783)
                                ---------  ------------  ------------  ---------
Balance, June 30, 2002                13         1,892           ---      1,905
Change in estimate                   ---         2,162           ---      2,162
Cash payments                        (13)         (556)          ---       (569)
                                ---------  ------------  ------------  ---------
Balance, September 30, 2002          ---         3,498           ---      3,498
Cash payments                        ---          (843)          ---       (843)
                                ---------  ------------  ------------  ---------
Balance, December 31, 2002     $     ---  $      2,655  $        ---  $   2,655
                                =========  ============  ============  =========

The Company had substantially completed the implementation of this restructuring program as of September 30, 2002. Amounts related to the net lease expenses due to the consolidation of facilities will be paid over the respective lease terms through fiscal 2006. The Company's estimated costs to exit these facilities are based on available commercial rates. The actual loss incurred in exiting these facilities could exceed the Company's estimates.

COMMITMENTS AND CONTINGENCIES

Letters of credit.
The Company assumed a letter of credit with IBM totaling $1,985,823 in connection with the acquisition of Catapulse, Inc. (Catapulse) in fiscal 2001. As part of a strategic business alliance between Catapulse and IBM, IBM agreed to provide services to Catapulse in exchange for an upfront payment of $1,237,477 related to development work through December 31, 2001, and monthly recurring fees of approximately $425,000 commencing upon IBM's completion of the development work and continuing till December 31, 2003. The upfront payment of $1,237,477 was paid during fiscal 2001 and the monthly recurring fees are related to ongoing services to be provided by IBM. The Company terminated this relationship with IBM in August 2002. In connection with such termination, the Company paid IBM a

termination fee of approximately $828,000, in addition to the monthly recurring fees for services through August 2002. The Company also paid a fee of approximately $153,000 for other related services performed by IBM prior to the termination. The letter of credit with IBM was terminated upon termination of this relationship and payment of the termination charges.

On July 3, 2001, a purported derivative lawsuit, entitled Krim v. Levy, et al., No. CV799591 (Supr. Ct. Santa Clara Cty.), was filed. Defendants' demurrer to the complaint was sustained with leave to amend on September 18, 2001. An amended complaint was filed on September 24, 2001. The complaint names as defendants the Company's Board of Directors and certain unnamed persons. The Company is a nominal defendant. The complaint alleges that defendants breached their fiduciary duties to the Company by deciding to invest in and to purchase Catapulse. The complaint seeks various equitable remedies and compensatory and special damages in unspecified amounts plus legal fees and costs from the defendants. The Court held a hearing on January 14, 2002 regarding the defendants' demurrer to the amended complaint. On January 22, 2002, the Court issued an order overruling defendants' demurrer. On September 18, 2002, the parties signed a Stipulation of Settlement that is subject to court approval. The terms of the settlement include a $2.675 million payment, $1 million of which is being funded by the Company's Directors and Officers insurance carriers, and the Company's agreement to adopt certain corporate governance procedures and controls. The settlement was approved and the action was dismissed with prejudice on November 26, 2002.

On December 11, 2002, an action, Gary Oblock and John Lowell vs. Rational Software Corp., et al., was filed in the Superior Court of the State of California for the County of Santa Clara. In this action, the plaintiffs named as defendants the Company and the Company' Board of Directors. The complaint asserts claims on behalf of the Company's public stockholders who are similarly situated with the plaintiffs. Among other things, the complaint alleges that the Company and the members of the Company's Board of Directors have breached its and their fiduciary duties to the Company's public stockholders, that Company's directors engaged in self-dealing in connection with approval of the merger, and that the Company's directors failed to take steps to maximize the Company's value to its public stockholders. The complaint seeks class certification and certain forms of equitable relief, including enjoining the consummation of the merger. On January 21, 2003, the Court denied plaintiffs' motion to for a temporary restraining order seeking to enjoin the January 22, 2003 shareholder vote concerning the IBM transaction. The Company continues to believe that the allegations are without merit and intends to vigorously contest the action. However, there can be no assurance that the Company or the other defendants will be successful in its or their defense.

From time to time, the Company is subject to legal claims. Historically, the cost of resolution of these claims has not been significant. However, any adverse outcome of current or future lawsuits against the Company may result in a material adverse effect on the Company's financial condition.

PROPOSED MERGER WITH INTERNATIONAL BUSINESS MACHINES CORPORATION

On December 6, 2002, the Company and IBM announced that the two companies have entered into a definitive agreement for IBM to acquire the equity of the Company at a price of approximately $2.1 billion in cash, or $10.50 per share. Subject to, among other conditions, regulatory approval and the Company's stockholders' affirmative vote,

this transaction is expected to close in the quarter ended March 31, 2003. The details of this transaction are discussed in the Company's Form 8-K filed with the SEC on December 9, 2002. In January 2003, the proposed merger received the required U.S. government regulatory approval. On January 22, 2003, the Company's stockholders approved this transaction.

ITEM 2
- Management's Discussion and Analysis of Financial Condition and Results of Operations

This quarterly report on Form 10-Q contains forward-looking statements within the meaning of the federal securities laws. These forward-looking statements include without limitation statements regarding the following: our expectation s regarding the adoption of accounting pronouncements and the effect of such adoption on us; our beliefs and expectations that the technology of NeuVis, Inc. will assist our current products to support major industry IDEs ; our expectations regarding the accounting treatment of goodwill and other intangible assets; our expectations regarding the nondeductibility of acquired goodwill for tax purposes ; our expectations regarding our restructuring program; our beliefs and expectations regarding the cost of consolidating excess facilities and time to sublease vacated properties ; our expectations and beliefs regarding the merits of and outcome of legal proceedings and litigation matters; our beliefs and expectations regarding international sales and our revenues; our belief that expected cash flow from operations, existing cash, cash equivalents and short-term investments will be sufficient to meet our cash requirements; our beliefs regarding the relationship of our service revenues to our license revenues; our beliefs and expectations regarding our future growth and financial performance; our beliefs and expectations regarding broad market acceptance of off-the-shelf products; our beliefs and expectations regarding the development of industry standards; our beliefs and expectations regarding the development of our industry and the market for our products and services, including usage in the Internet and intranet environments; our beliefs regarding product-development investments; our beliefs and expectations regarding competition and our ability to compete including the elements on which we compete; our beliefs and expectations regarding hiring and retaining qualified individuals and the efforts and abilities of senior management personnel; our beliefs and expectations regarding our future revenue growth and our ability to expand our direct sales force and maintain a high level of consulting, training and customer support; our beliefs and expectations regarding our development, distribution and marketing strategies and our strategic relationships; our beliefs and expectations regarding errors or defects in our products; our beliefs and expectations regarding the scope of United States patent protection; our beliefs regarding our dependence on third-party software; our beliefs and expectations regarding infringement claims and liabilities; our beliefs and expectations regarding financial and strategic benefits of past and future acquisitions; our beliefs and expectations with regard to the proposed transaction with IBM; and our beliefs and expectations regarding foreign currency exchange rate and interest rate risks. These statements are subject to risks and uncertainties that could cause actual results and events to differ materially. These risks and uncertainties include without limitation those identified in the section of this quarterly report on Form 10-Q entitled "Factors That May Affect Future Results" below. We undertake no obligation to update forward-looking statements to reflect events or circumstances occurring after the date of this quarterly report on Form 10-Q.

As used in this quarterly report on Form 10-Q, unless the context otherwise requires, the terms "we," "us," "the Company" and "Rational" refer to Rational Software Corporation, a Delaware corporation, and its subsidiaries.

Overview

Our revenues are derived from product license fees and charges for services, including technical consulting, training, and customer support. In accordance with generally accepted accounting principles, our software license revenues are generally recognized when a customer written contract or purchase order has been received and accepted, the software product has been shipped, there are no uncertainties surrounding product acceptance, the fees are fixed or determinable, and collection is considered probable. For customer license agreements that meet these recognition criteria, the portion of the fees related to software licenses is generally recognized in the current period, while the portion of the fees related to services is recognized as the services are performed. Revenues from consulting and training are recognized when earned. Our license agreements do not provide a right of return, and an allowance is maintained for potential credit losses.

On December 6, 2002, we entered into a definitive merger agreement with International Business Machines Corporation (IBM) for IBM to acquire the equity of Rational at a price of approximately $2.1 billion in cash or $10.50 per share. The waiting period required by the Hart-Scott-Rodino Antitrust Improvements Act of 1976 relating to our proposed merger with a wholly-owned subsidiary of IBM expired on January 21, 2003. IBM filed a notification on Form CO with respect to the merger on January 17, 2003, which triggered the start of the review period required under the European Commission's Merger Regulation. Our stockholders approved a proposal to adopt the merger agreement at a Special Meeting of Rational's stockholders held on January 22, 2003. Approximately 67.6% of the total outstanding shares, or approximately 97.4% of the votes cast at the special meeting, were cast in favor of the proposal. We expect the transaction to close in the first calendar quarter of 2003. Despite our intent to complete the planned merger, as part of our ordinary course strategic planning, we

continue to consider our revenue and cost forecasts, capital resources and other forward-looking planning as a stand-alone entity.

Comparative Analysis of Operating Results for the Three and Nine Months Ended December 31, 2002 and December 31, 2001

Revenues

Total revenues for the three- and nine-month periods ended December 31, 2002 decreased 5% and 8%, respectively, from the corresponding prior year periods.

Net product revenues.
Net product revenues for the three- and nine-month periods ended December 31, 2002 decreased 16% and 20%, respectively, from the corresponding prior year periods. The decrease in product revenues was a result of reduced sales across the majority of our products due primarily to the slowdown in the economy and reduced spending on information technology by our customers.

Consulting and support revenues.
Consulting and support revenues for the three- and nine-month periods ended December 31, 2002 increased 5% and 2%, respectively, from the corresponding prior year periods. The net increase in consulting and support revenues was a result of increased renewals of our customer support arrangements offset by a decrease in consulting revenues.

International sales.
Revenues from international product sales and consulting and support accounted for 48% and 49%, respectively, of total revenues for the three- and nine-month periods ended December 31, 2002 compared to 43% for both the comparable prior year periods. We expect international sales to continue to account for a major portion of total revenues in future periods, although the percentage of international revenues could fluctuate from period to period due to economic or other factors in international regions. Our international sales are priced principally in local currencies. We enter into short-term forward currency contracts to hedge against the impact of foreign currency exchange rate fluctuations on balance sheet exposures denominated in currencies other than the local, or "functional," currency of our subsidiaries or us. The total amount of these contracts is approximately offset by the underlying assets and liabilities denominated in non-functional currencies, and such contracts are carried at fair market value. The associated gains and losses were not material to our results of operations in any period presented.

Cost of Revenues

Cost of product revenues.
Cost of product revenues consists principally of materials, packaging and freight, amortization of purchased technology, and royalties. Cost of product revenues for the three- and nine-month periods ended December 31, 2002 increased 2% and 3%, respectively, from the corresponding prior year periods. These costs represented 19% and 18%, respectively, of net product revenues for the three- and nine-month periods ended December 31, 2002, compared to 15% and 14%, respectively, of net product revenues for the corresponding prior year periods. The increase in cost of product revenues from the corresponding prior year periods was primarily a result of increased amortization of purchased intangibles and royalty costs, offset by decreased product material costs. The increase in cost of product revenues as a percentage of product revenues was primarily a result of decreased product revenues.

Cost of consulting and support revenues.
Cost of consulting and support revenues consists principally of personnel costs for training, consulting, and customer support. Cost of consulting and support revenues for the three- and nine- month periods ended December 31, 2002 decreased 6% and 9%, respectively, from the corresponding prior year periods. These costs represented 19% of total consulting and support revenues for both the three- and nine-month periods ended December 31, 2002 compared to 21% for both the corresponding prior year periods. The decrease in cost of consulting and support revenues was primarily a result of a decrease in consulting revenues for the same periods. The decrease in cost of consulting and support revenues as a percentage of total consulting and support revenues was due primarily to an increased mix of higher margin support revenues versus lower margin consulting revenues.

Operating Expenses

Research and development.
Research and development expenses for the three- and nine-month periods ended December 31, 2002 decreased 4% and 7%, respectively, from the corresponding prior year periods. These costs represented 25% and 26%, respectively, of total revenues for the three- and nine-month periods ended December 31, 2002 compared to 25% and 26%, respectively, of total revenues for the corresponding prior year periods.

The decrease for the three-month period ended December 31, 2002 in research and development expenses was primarily related to decreased headcount related costs as a result of cost control measures. The decrease for the nine-month period ended December 31, 2002 in research and development expenses was primarily related to reduced spending on outside consultants and decreased headcount related costs as a result of cost control measures.

Sales and marketing.
Sales and marketing expenses for the three- and nine-month periods ended December 31, 2002 decreased 3% and 4%, respectively, from the corresponding prior year periods. These costs represented 43% and 44%, respectively, of total revenues for the three- and nine-month periods ended December 31, 2002 compared to 42% and 43%, respectively, of total revenues for the corresponding prior year periods. The decrease in expenditures for sales and marketing was primarily due to decreased headcount related costs as a result of cost control measures.

General and administrative.
General and administrative expenses for the three- and nine-month periods ended December 31, 2002 decreased 13% and 14%, respectively, from the corresponding prior year periods. These costs represented 7% of total revenues for both the three- and nine-month periods ended December 31, 2002 compared to 8% of total revenues for the corresponding prior year periods. The period over period decrease in general and administrative expenses resulted primarily from lower bad debt expenses recorded in the three- and nine-month periods ended December 31, 2002 compared to corresponding prior year periods.

Amortization of goodwill, purchased intangibles, and deferred stock-based compensation.
In the second quarter of fiscal 2003, we acquired NeuVis Inc. (NeuVis) and recorded goodwill and purchased intangibles. (See Note 7 of Notes to Condensed Consolidated Financial Statements for additional information related to the NeuVis acquisition). In the fourth quarter of fiscal 2001, we acquired Attol Testware (Attol) and the remaining outstanding shares of Catapulse, Inc. (Catapulse) not already owned by Rational, both of which were accounted for under the purchase method of accounting. Accordingly, we recorded goodwill and purchased intangibles representing the excess of the purchase price paid over the fair value of the net assets acquired. In fiscal 2000, we acquired ObjecTime Limited, which was also accounted for under the purchase method of accounting. Also as part of NeuVis acquisition, we recorded approximately $5.9 million of deferred stock-based compensation relating to the restricted stock issued. In the acquisitions of Attol and the remaining outstanding shares of Catapulse in fiscal 2001, we recorded approximately $295.0 million of deferred stock-based compensation relating to the unvested stock options and restricted stock assumed in the acquisitions. In fiscal 2000, in connection with the grant of certain stock options to employees of Catapulse, the results of which were consolidated with Rational's results, we recorded deferred stock-based compensation of approximately $3.0 million representing the difference between the deemed fair value of the Common Stock for accounting purposes and the exercise price of these options at the date of grant. Amortization of goodwill and purchased intangibles was approximately $0.3 million and $1.0 million, respectively, for the three- and nine-month periods ended December 31, 2002 compared to approximately $18.0 million and $54.1 million for the corresponding prior year periods. The period over period decrease was primarily due to the adoption of Statement of Financial Accounting Standards (SFAS) 142, "Goodwill and Other Intangible Assets," which ceased the amortization of goodwill beginning April 1, 2002. (See Note 8 of Notes to Condensed Consolidated Financial Statements for additional information related to SFAS 142.) Amortization of deferred stock-based compensation was approximately $18.6 million and $55.2 million, respectively, for the three- and nine-months ended December 31, 2002 compared to $18.1 million and $54.3 million, respectively, for the corresponding prior year periods. The period over period decrease in amortization of deferred stock-based compensation was primarily due to the cancellation of deferred stock-based compensation related to the Catapulse acquisition as a result of the restructuring program in July 2002.

Charges for acquired in-process research and development
. In connection with the acquisition of NeuVis, we allocated $4.5 million of the total purchase price to charges for acquired in-process research and development (IPR&D) in the quarter ended September 30, 2002 (see Note 7 of Notes to Consolidated Financial Statements).

This allocation represented the estimated fair value based on discounted cash flows related to incomplete R&D projects. At the date of acquisition, the development of these projects had not reached technological feasibility. Accordingly, these costs were expensed as of the acquisition date. Management is primarily responsible for estimating the fair value of IPR&D, which was determined with the assistance of an independent appraiser.

At the acquisition date, NeuVis was a privately held provider of an e-business Rapid Application Development (RAD) platform for agile, enterprise-class applications. The projects under development at the valuation date represented Neuvis' next- generation e-business development platform, the features of which involved significant

technological risks and were not developed at the time of acquisition. The technologies under development were approximately 60% complete.

We allocated values to IPR&D based on the stage of development of each product, the time and resources needed to complete each product, and the expected income and associated risks. The value assigned to acquired IPR&D was determined by estimating the costs to develop the purchased IPR&D into commercially viable products, estimating the resulting net cash flows from those products, and discounting the net cash flows to their present value. The revenue projection used to value the IPR&D was based on estimates of relevant market sizes and growth factors, expected trends in technology, and the nature and expected timing of new product introductions by NeuVis and its competitors. The resulting net cash flows from such products are based on management's estimates of cost of sales, operating expenses, and income taxes from such products.

Aggregate revenues for the developmental NeuVis products were estimated to grow based on forecasted sales for the three years following introduction, assuming the successful completion and market acceptance of the major R&D programs. The estimated revenues for the in-process projects were expected to peak within three years of acquisition and then decline as other new products and technologies are expected to enter the market.

The rate utilized to discount the net cash flows to their present value was based on an estimated weighted average cost of capital calculation. Due to the nature of the forecast and the risks associated with the projected growth and profitability of the developmental projects, a discount rate of 30% was considered appropriate for the IPR&D. This discount rate was consistent with the implied transaction discount rate and aggressiveness of the projected financial statements.

The estimates used by us in valuing IPR&D were based upon assumptions we believe to be reasonable but which are inherently uncertain and unpredictable. Our assumptions may be incomplete or inaccurate, and no assurance can be given that unanticipated events and circumstances will not occur. Accordingly, actual results may vary from the projected results. Any such variance may result in a material adverse effect on our financial condition and results of operations.

Restructuring and other charges.

Fiscal 2003 restructuring and other charges

In July 2002, we announced a restructuring program related to the cessation of selected development activities associated with our hosted development services. The restructuring included a workforce reduction, impairment of unused software, and termination of third party contracts. As a result of the restructuring program, we recorded approximately $4.1 million restructuring related charges, which were classified within operating expenses in the quarter ended September 30, 2002.

Workforce reduction - The restructuring program resulted in the reduction of 47 employees within the hosted development services group. We recorded a workforce reduction charge of approximately $1.3 million primarily relating to severance and fringe benefits. The workforce reductions started in July 2002 and the employment of a majority of the affected employees was terminated as of December 31, 2002.

Impairment of unused software - As a result of the restructuring program, certain software in the hosted development services will have no future value as we have discontinued related development activities. We recorded a restructuring charge of approximately $0.5 million relating to the impairment of these assets.

Termination of other third-party agreements - We also recorded a charge of approximately $2.3 million relating to payments to third parties to terminate contractual agreements associated with the hosted development services.

A summary of these restructuring charges is outlined as follows (in thousands):

                                                                                
                                                         Termination
                                           Impairment of   of Other
                                Workforce     Unused     Third-Party
                                Reduction    Software     Agreements     Total
                                ---------  ------------  ------------  ---------
Provision recorded at
  restructuring                $   1,328  $        458  $      2,342  $   4,128
Non-cash charges                     ---          (458)         (442)      (900)
Cash payments                       (872)          ---        (1,602)    (2,474)
                                ---------  ------------  ------------  ---------
Balance, September 30, 2002          456           ---           298        754
Cash payments                       (161)          ---          (261)      (422)
                                ---------  ------------  ------------  ---------
Balance, December 31, 2002     $     295  $        ---  $         37  $     332
                                =========  ============  ============  =========

We had substantially completed the implementation of this restructuring program as of December 31, 2002. Remaining cash expenditures will be paid through March 2003.

In addition, in the quarter ended September 30, 2002, we recorded an increase of $6.1 million in other charges as a result of updating our estimates associated with unused facilities related to merger and integration activities and other facilities commitments previously provided for. This adjustment reflects the continued weakness in lease rates and sublease activities, which resulted in changes regarding estimated vacancy periods and sublease income. We anticipate that it will take approximately 15 to 19 months to sublease the remaining vacated properties. A summary of this charge is outlined as follows (in thousands):


                                Facility
                                 Related
                                 Charges
                                --------- 
Provision recorded at
  September 30, 2002           $   6,091
Cash payments                       (411)
                                ---------
Balance, December 31, 2002     $   5,680
                                =========

Amounts related to the lease expense, net of anticipated sublease proceeds, will be paid over the respective lease terms through fiscal 2012. We estimated additional lease costs for unused facilities based on currently available commercial rates. The actual loss incurred on these facilities could exceed our estimates.

Fiscal 2002 restructuring and other charges

In April 2001, we announced a restructuring program to focus our efforts towards concentrating on our strongest opportunities, reducing operating expenses, and improving allocation of resources. The restructuring included a worldwide workforce reduction, consolidation of excess facilities and restructuring of certain business functions. As a result of the restructuring program, we recorded restructuring costs of approximately $17.3 million, which were classified within operating expenses in the quarter ended June 30, 2001.

Worldwide work force reduction - The restructuring program resulted in the reduction of approximately 500 employees across all business functions and geographic regions. The worldwide workforce reductions started in April 2001 and the employment of the affected employees was terminated in the quarter ended June 30, 2001. We recorded a workforce reduction charge of approximately $10.1 million relating primarily to severance and fringe benefits.

Consolidation of excess facilities - The consolidation of excess facilities included the closure of certain corporate facilities and sales offices related to business activities that have been exited. We recorded a restructuring charge of approximately $3.7 million for excess facilities relating primarily to lease termination fees and non-cancelable lease costs.

Termination of other third-party agreements - We also recorded other charges of approximately $3.5 million relating primarily to payments to third parties to terminate contractual agreements as a result of the restructuring program.

In the quarter ended September 30, 2002, we recorded an increase of $2.2 million relating to the consolidation of excess facilities, as a result of updating our estimates associated with unused facilities. This adjustment reflects the continued weakness in lease rates and sublease activities, which resulted in changes regarding estimated vacancy periods and sublease income. We anticipate that it will take approximately 7 to 15 months to sublease the remaining vacated properties.

A summary of these restructuring costs is outlined as follows (in thousands):


                                                         Termination
                                           Consolidation   of Other
                                Workforce   of Excess    Third-Party
                                Reduction   Facilities    Agreements     Total
                                ---------  ------------  ------------  ---------
Provision recorded at
  restructuring                $  10,149  $      3,719  $      3,463  $  17,331
Non-cash charges                     ---           ---          (856)      (856)
Cash payments                     (9,912)       (1,268)       (2,607)   (13,787)
                                ---------  ------------  ------------  ---------
Balance, March 31, 2002              237         2,451           ---      2,688
Cash payments                       (224)         (559)          ---       (783)
                                ---------  ------------  ------------  ---------
Balance, June 30, 2002                13         1,892           ---      1,905
Change in estimate                   ---         2,162           ---      2,162
Cash payments                        (13)         (556)          ---       (569)
                                ---------  ------------  ------------  ---------
Balance, September 30, 2002          ---         3,498           ---      3,498
Cash payments                        ---          (843)          ---       (843)
                                ---------  ------------  ------------  ---------
Balance, December 31, 2002     $     ---  $      2,655  $        ---  $   2,655
                                =========  ============  ============  =========

We had substantially completed the implementation of this restructuring program as of September 30, 2002. Amounts related to the lease expenses, net of anticipated sublease proceeds, will be paid over the respective lease terms through fiscal 2006. Our estimated costs to exit these facilities are based on currently available commercial rates. The actual loss incurred in exiting these facilities could exceed our estimates.

Other Income, net

Other income, net consists primarily of interest income, interest expense, and gains and losses due to fluctuations in currency exchange rates. Other income, net has fluctuated as a result of the amount of cash available for investment in interest-bearing instruments and from fluctuations in currency exchange rates. Other income, net decreased 82% and 72%, respectively, for the three- and nine-month periods ended December 31, 2002 from the corresponding prior year periods. The current year decrease was due primarily to lower interest income as a result of lower interest rates.

Income Taxes

The effective income tax rate benefit was 61% and 45%, respectively, for the three- and nine-month periods ended December 31, 2002 compared to 18% and 23%, respectively, for the corresponding prior year periods. The changes in our effective tax rate were primarily due to the nondeductibility of certain accounting charges associated with our merger and acquisition activities. Excluding certain merger and acquisition related charges, our effective rates were 28% for both the three- and nine-month periods ended December 31, 2002 and 30% for both the three- and nine-month periods ended December 31, 2001. The benefit from income taxes for the three- and nine-month periods ended December 31, 2002 and 2001 differ from the benefit from income taxes computed at the federal statutory income tax rate due primarily to the impact of nondeductible merger and acquisition charges and foreign and state income taxes, offset by earnings permanently reinvested in offshore operations and research credits.

Liquidity and Capital Resources

At December 31, 2002, we had cash, cash equivalents, and short-term investments of $1.0 billion and working capital of $884.5 million. Net cash provided by operating activities for the nine months ended December 31, 2002 was composed primarily of the net loss plus noncash charges for acquired IPR&D, depreciation and amortization, tax benefits from employee stock plans, compensation expenses related to stock options, decreases in accounts receivable, prepaid expenses, and other assets, and increases in accrued employee benefits and other accrued expenses and income taxes payable. These were offset primarily by decreases in accounts payable,

accrued merger and integration expenses, deferred revenue, and net deferred tax liability. Net cash used in investing activities resulted primarily from a business acquisition, a net increase in short-term investments, and capital expenditure purchases. Net cash used in financing activities resulted primarily from cash used to repurchase our Common Stock, offset by net proceeds received from issuance of Common Stock under the employee stock plans and net proceeds received from reissuance of treasury stock under employee stock plans.

In April 2001, our Board of Directors authorized the repurchase of 20.0 million shares of our Common Stock from time to time in the open market. We repurchased 1.5 million shares of our Common Stock for total cash outlay of approximately $17.3 million for the six months ended September 30, 2002. As of September 30, 2002, we had repurchased approximately 9.7 million shares of our Common Stock under this program for an aggregate cost of approximately $113.0 million. Repurchases help offset dilution from stock issued under our stock option and stock purchase plans. The timing and size of any future stock repurchases are subject to market conditions, stock prices, our cash position, and other cash requirements going forward.

In fiscal 2000, we completed an offering of 5% Convertible Subordinated Notes in the aggregate principal amount of $500.0 million (the Notes), which mature on February 1, 2007. The interest on the Notes is payable on February 1 and August 1 of each year. The Notes are convertible into shares of our Common Stock at any time prior to the close of business on the maturity date, unless previously redeemed, at a conversion price of $35.72 per share, subject to antidilution adjustments.

We believe that expected cash flow from operations combined with existing cash, cash equivalents and short-term investments will be sufficient to meet our cash requirements for the next 12 months and the foreseeable future.

Factors That May Affect Future Results

Significant unanticipated fluctuations in our quarterly revenues and operating results may cause us not to meet securities analysts' or investors' expectations and may result in a decline in the prices of our Common Stock and our Convertible Notes.

Our net revenues and operating results are difficult to predict and may fluctuate significantly from quarter to quarter. If our revenues, operating results, earnings, or future projections are below the levels expected by securities analysts, the prices of our Common Stock and Convertible Notes are likely to decline.

Factors that may cause quarterly fluctuations in our operating results include, but are not limited to:

- global economic conditions;

- decreased spending on technology due to adverse economic conditions;

- the discretionary nature of our customers' purchase and budget cycles;

- difficulty predicting the size and timing of customer orders;

- long sales cycles;

- seasonal variations in operating results;

- introduction or enhancement of our products or our competitors' products;

- changes in our pricing policies or the pricing policies of our competitors;

- an increase in our operating costs;

- whether we are able to expand our sales and marketing programs;

- the mix of our products and services sold;

- the level of sales incentives for our direct sales force;

- the mix of sales channels through which our products and services are sold;

- the mix of our domestic and international sales;

- the ability of our sales force to effectively sell and support new products;

- an increase in the level of our product returns;

- fluctuations in foreign currency exchange rates;

- changes in accounting pronouncements applicable to us;

- costs associated with acquisitions; and

- the impact of terrorist attacks and wars.

In addition, the timing of our product revenues is difficult to predict because our sales cycles vary substantially from product to product and customer to customer. We base our operating expenses on our expectations regarding future revenue levels. As a result, if total revenues for a particular quarter are below our expectations, we could not proportionately reduce operating expenses for that quarter. Therefore, a revenue shortfall would have a disproportionate effect on our operating results for that quarter. In addition, because our service revenues are largely correlated with our license revenues, a decline in license revenues could also cause a decline in our service revenues in the same quarter or subsequent quarters.

Although we experienced growth in revenues in years prior to the year ended March 31, 2002, there can be no assurance that, in the future, we will again achieve or maintain revenue growth or be profitable on a quarterly or annual basis. Nor can there be any assurance that, in the future, we will meet investors' or securities analysts' expectations. The revenues and operating results experienced by us in recent quarters are not necessarily indicative of future results. As a result of the factors described above and other factors, our operating results are subject to significant variation from quarter to quarter, and we believe that period-to-period comparisons of our results of operations are not necessarily useful. If our operating results do not support the prices of our Common Stock or Convertible Notes or are below investors' or securities analysts' expectations, the prices of our Common Stock and Convertible Notes could decline.

If market acceptance of our sophisticated software development tools fails to grow adequately, our business may suffer.

Our future growth and financial performance will depend in part on broad market acceptance of off-the-shelf products that address critical elements of the software development process. Currently, the number of software developers using our products is relatively small compared with the number of developers using more traditional technology and products, internally developed tools, or manual approaches. Potential customers may be unwilling to make the significant capital investment needed to purchase our products and retrain their software developers to build software using our products rather than traditional techniques. Many of our customers have purchased only small quantities of our products, and these or new customers may decide not to broadly implement or purchase additional units of our products.

If industry standards relating to our business do not gain general acceptance, we may be unable to continue to develop and market our products, and our business may suffer.

Our future growth and financial performance depends on the development of industry standards that facilitate the adoption of component-based development, as well as enhance our ability to play a leading role in the establishment of those standards. For example, we led the development of the Unified Modeling Language, or UML for visual modeling, which was adopted by the Object Management Group, or OMG, a software industry consortium, for inclusion in its object analysis and design facility specification. The official sanction in the future of a competing standard by the OMG or the promulgation of a competing standard by one or more major platform vendors could harm our marketing and sales efforts and, in turn, our business.

If we do not develop and enhance new and existing products to keep pace with technological, market, and industry changes, our revenues may decline.

The industry for tools automating software application development and management is characterized by rapid technological advances, changes in customer requirements, and frequent new product introductions and enhancements. If we fail to anticipate or respond adequately to technology developments, industry standards, or practices and customer requirements, or if we experience any significant delays in product development, introduction, or integration, our products may become obsolete or unmarketable, our ability to compete may be impaired, and our revenues may decline. We must respond rapidly to developments related to Internet and intranet applications, hardware platforms, operating systems, and programming languages. These developments will require us to make substantial product-development investments.

In addition, rapid growth of, interest in, and use of Internet and intranet environments has occurred only in the last few years and is still an emerging phenomena. Our success may depend, in part, on the compatibility of our products with Internet and intranet applications. We may fail to effectively adapt our products for use in Internet or intranet environments, or to produce competitive Internet and intranet applications. For example, our decision to cease selected development activities associated with our hosted development service will likely adversely impact our ability to offer our products for use in Internet environments.

If we do not effectively compete with new and existing competitors, our revenues and operating margins will decline.

The industry for automating software application development and management is extremely competitive and rapidly changing. We expect to continue to experience significant and increasing levels of competition in the future. Bases of competition include:

- corporate and product reputation;

- innovation with frequent product enhancement, including the support of the development of the new set of emerging standards and tools for building Web services applications and the support of rapidly changing standards and technologies used in the development of Web-based applications and off-the-shelf products;

- breadth of integrated product lines and the availability of integrated suites and bundles, including the development of a broader line of products for programming languages such as C#, C/C++, Visual Basic and Java;

- product architecture, functionality, and features, including the support of multiple platforms (including Microsoft Windows operating systems, Microsoft .NET, J2EE, IBM, UNIX, Linux and various embedded systems development platforms);

- product quality, performance, and ease of use;

- quality of support and availability of technical consulting services, including the use of the latest technologies to support Web-based development of business-critical applications; and

- price.

We face intense competition for each product in our product lines, generally from both Windows and UNIX-based vendors. Current and potential competitors in one or more of our markets include, among others, AccuRev, Inc., Aonix Corporation, ARTiSAN Software Tools, BEA Systems, Inc., Borland Software Corporation, CanyonBlue Inc, CollabNet, Computer Associates International Inc., Compuware Corporation, CVS Corporation, Embarcadero, Empirix Inc., I-Logix Inc., IAR Systems, Integrated Chipware, IntelliJ, Merant, Mercury Interactive Corporation, Microsoft Corporation, Minq Software, MKS Inc., No Magic Inc., Oracle Corporation, ParaSoft Corporation, Perforce Software Inc., Popkin Software, RadView Software Ltd., Segue Software, Inc., Serena Software, Inc., Sesame Technology, Sitraka, SLATE, Sparx Systems, Sun Microsystems, Sybase, Inc., TeamShare, Inc., Telelogic, Tigris, and Vector Software, as well as numerous other public and privately held software application development and tools suppliers. Because individual

product sales are often the first step in a broader customer relationship, our success will depend in part on our ability to successfully compete with numerous competitors at each point in their product lines.

We believe that we will continue to experience increasing competition. Some of our competitors have, and new competitors may have, larger technical staffs, more established distribution channels, and greater financial resources than we do. There can be no assurance that either existing or new competitors will not develop products that are superior to our products or that achieve greater market acceptance. In addition, many of our strategic partners compete with each other and this may adversely impact our relationship with an individual partner or a number of partners.

We also face competition from the internal development teams of our customers. Potential customers may create their own software development tools and processes, including ad hoc integrations of stand-alone development tools from different vendors. Customers may be reluctant to purchase products offered by independent vendors such as ours. If we are unable to educate prospective customers about the advantages of our products versus internally developed software quality systems, our results of operations may be adversely affected.

Our future success will depend in large part on our ability to increase our share of target markets and to license additional products and product enhancements to existing customers. Future competition may result in price reductions, reduced margins, or loss of sales, which in turn would have a material adverse effect on our business, results of operations, and financial condition.

Our international operations expose us to greater management, collections, currency, intellectual property, regulatory, and other risks.

International sales accounted for approximately 48% and 49%, respectively, of our revenues for the three-and nine- month periods ended December 31, 2002 compared to 43% for both the comparable prior year periods. We expect that international sales will continue to account for a significant portion of our revenues in future periods. In addition, international sales are subject to inherent risks, including:

- unexpected changes in regulatory requirements and tariffs;

- unexpected changes in global economic conditions;

- adverse effects of terrorist attacks, political turmoil or wars;

- difficulties in staffing and managing foreign operations;

- difficulties in ensuring compliance with U.S. business and accounting standards and practices;

- longer payment cycles;

- potentially adverse tax consequences;

- price controls or other restrictions on foreign currency;

- difficulties in obtaining export and import licenses;

- costs of localizing products for some markets;

- lack of acceptance of localized products in international markets; and

- the effects of high local wage scales and other expenses.

Our international sales are generally transacted through our international sales subsidiaries. The revenues generated by these subsidiaries, as well as their local expenses, are generally denominated in local currencies. Accordingly, the functional currency of each international sales subsidiary is the local currency. We have engaged in limited hedging activities to protect us against losses arising from remeasuring assets and liabilities denominated in currencies other than the functional currency of the related subsidiary. We are also exposed to foreign exchange rate fluctuations as the financial results of international subsidiaries are translated into U.S. dollars in consolidation. As exchange rates vary, these results, when translated, may

vary from expectations and adversely impact our overall expected profitability. We currently do not hedge against this exposure. Fluctuations in foreign currencies could harm our financial condition and operating results.

If we lose key personnel or cannot hire enough qualified personnel, our ability to manage our business, develop new products, and increase our revenues will suffer.

We believe that the hiring and retaining of qualified individuals at all levels in our organization will be essential to our ability to manage the development of our business and products successfully. Competition for highly qualified technical personnel is intense, and we may not be successful in attracting and retaining the necessary personnel, which may limit the rate at which we can develop products and generate sales. We will be particularly dependent on the efforts and abilities of our senior management personnel. The departure of any of our senior management members or other key personnel could harm our business. In addition, merger activities can be accompanied or followed by the departure of key personnel, which could compound the difficulty of integrating the operations of the parties to the business combination and adversely affect our business.

If we fail to maintain and expand our distribution channels, our business will suffer.

We currently distribute our products primarily through field sales personnel teamed with highly trained technical support personnel, as well as through our telesales organizations, our Web site, and indirectly through channels such as value-added resellers and distributors. Our ability to achieve revenue growth in the future will depend in large part on our success in expanding our direct sales force and in maintaining a high level of technical consulting, training, and customer support.

We depend on strategic relationships and business alliances for continued growth of our business.

Our development, marketing, and distribution strategies rely increasingly on our ability to form long-term strategic relationships with major software and hardware vendors, many of whom are substantially larger than us. These business relationships often consist of cooperative marketing programs, joint customer seminars, lead referrals, or joint development projects. For example, we are currently a party to relationships with Microsoft Corporation (Microsoft) and International Business Machines Corporation (IBM) related to the use of our Rational XDE functionality in their platforms. Although certain aspects of some of these relationships are contractual in nature, many important aspects of these relationships depend on the continued cooperation of each party with us. Merger activity, such as the acquisitions of NeuVis, Catapulse, and Attol, may disrupt these relationships or activities, and some companies may reassess the value of their relationship with us as a result of such merger activity. Divergence in strategy or change in focus or competitive product offerings by any of these companies may interfere with our ability to develop, market, sell, or support our products, which in turn could harm our business. In addition, one or more of these companies may use the information they gain from their relationship with us to develop or market competing products or to develop the functionality of our products into their existing products.

Our products could contain software defects that could result in a loss of our revenues and make it more difficult for us to achieve market acceptance of our products.

Complex software products such as ours often contain undetected errors, or ''bugs,'' or performance problems. These defects are most frequently found during the period immediately following the introduction of new products or enhancements to existing products. Despite extensive product testing prior to introduction, our products have in the past contained software errors that were discovered after commercial introduction. Errors or performance problems may also be discovered in the future. Any future software defects discovered after shipment of our products could result in loss of revenues or delays in market acceptance, which could harm our business. Further, because we rely on our own products in connection with the development of our software, these errors may make it more difficult to sell our products in the future.

If we fail to adequately protect our intellectual property rights, competitors may use our technology and trademarks, which could weaken our competitive position, reduce our revenues, and increase our costs.

We rely on a combination of copyright, trademark, patent, and trade-secret laws, employee and third-party nondisclosure agreements, and other arrangements to protect our proprietary rights. Despite these precautions, it may be possible for unauthorized third parties to copy our products or obtain and use information that we regard as proprietary to create products that compete against ours. In addition, some license provisions protecting against unauthorized use, copying, transfer, and disclosure of our licensed programs may be unenforceable under the laws of certain jurisdictions and foreign countries.

In addition, the laws of some countries do not protect proprietary rights to the same extent as do the laws of the United States. To the extent that we increase our international activities, our exposure to unauthorized copying and use of our products and proprietary information will increase.

The scope of United States patent protection in the software industry is not well defined and will evolve as the United States Patent and Trademark Office grants additional patents. Because patent applications in the United States are not publicly disclosed until the patent is issued, applications may have been filed that would relate to our products.

We rely on software licensed from third parties that is used in our products.

We also rely on software that we license from third parties, including open source software, that is integrated with internally developed software and used in our products to perform key functions. Licenses to such third-party software may not be available to us on commercially reasonable terms or at all, and could adversely affect our ability to protect our proprietary rights. Further, the third-party software may not be appropriately verified, supported, maintained, or enhanced by the licensors. Our loss of licenses to or the inability to support, maintain, and enhance any of this software would likely result in increased costs and delays or reductions in our product shipments until we are able to develop functionally equivalent software or identify and obtain licenses to alternative third party software with comparable functionality, which we may be unable to do. We also may be liable for substantial damages in the event of unauthorized use of third-party software. If any of these events occur, our business and operating results could be materially and adversely affected.

Third parties could assert that our software products and services infringe on their intellectual property rights, which could expose us to increased costs and litigation.

We expect that we will be increasingly subject to infringement claims as the number of products and competitors grows and the functionality of products in different industry segments overlaps. Third parties may assert infringement claims against us in the future and their claims may or may not be successful. We could incur substantial costs in defending ourselves and our customers against third-party claims. Parties making their claims may be able to obtain injunctive or other equitable relief that could effectively block our ability to sell our products in the United States and abroad and could result in an award of substantial damages against us. In the event of a claim of infringement, we may be required to obtain one or more licenses from third parties. We cannot be sure that we can obtain necessary licenses from third parties at a reasonable cost, or at all. Defense of any lawsuit or failure to obtain any required license could delay or prevent shipment of our products and increase our costs. The occurrence of any of these events could materially harm our business and operating results.

Promotional product versions may adversely impact our actual product sales.

Our marketing strategy relies in part on making elements of our technology available for no charge or at a very low price, either directly or by incorporating these elements into products offered by third parties, such as Microsoft, with whom we have strategic alliances. This strategy is designed to expose our products to a broader customer base than our historical customer base and to encourage potential customers to purchase an upgrade or other higher-priced products from us. We may not be able to introduce enhancements to our full-price products or versions of our products with intermediate functionality at a rate necessary to adequately differentiate them from the promotional versions, particularly in cases where our partners are distributing versions of our products with other desirable features, which could reduce sales of our products.

If we cannot successfully integrate our past and future acquisitions and achieve intended financial or strategic benefits, our revenues may decline and our expenses may increase.

We have acquired a number of businesses, technologies, and products, most recently in July 2002. If we fail to achieve the intended financial or strategic benefits of past and future acquisitions, including the acquisitions of NeuVis, Attol, and Catapulse, our operating results will suffer. For example, we recently ceased selected development activities relating to the technology developed by Catapulse. Acquisitions entail numerous risks, including:

- difficulty with the assimilation of acquired operations and products;

- failure to achieve targeted synergies;

- inability to retain key employees of the acquired companies;

- loss of key business relationships of the acquired company; and

- diversion of the attention of our management team.

In addition, if we undertake future acquisitions, we may issue dilutive securities, assume or incur additional debt obligations, incur large, one-time expenses, or acquire intangible assets that would result in significant future amortization expense. Any of these events could harm our business or operating results.

Business interruptions could adversely affect our business.

Our operations are vulnerable to interruption by fire, earthquake, power loss, computer viruses, telecommunications and computer network failures, terrorist attacks, wars and other events beyond our control. In addition, we rely on a private network for communication and access to our digital resources. If we lost access to our network as a result of local or general telecommunications failures, our business operations would be adversely affected.

Our proposed transaction with IBM may adversely affect our results of operations whether or not the merger is completed, and the merger may not be completed on a timely basis or at all.

In response to our pending merger transaction with IBM, our customers may defer purchasing decisions or elect to switch to other suppliers due to uncertainty about the direction of our product offerings following the merger and our willingness to support and service existing products. In order to address customer uncertainty, we may incur additional obligations. Uncertainty surrounding the proposed transaction also may have an adverse effect on employee morale and retention, and result in the diversion of management attention and resources. In addition, the market value of our common stock will continue to vary prior to completion of the merger transaction due to changes in the business, operations, or prospects of Rational, market assessments of the merger, regulatory considerations, market and economic considerations, or other factors. However, there will be no adjustment to the consideration to be received by our stockholders in connection with the merger, and the parties do not have a right to terminate the merger agreement based upon changes in the market price of our common stock.

If the merger is not completed, the price of our common stock may decline to the extent that the current market price of our common stock reflects a market assumption that the merger will be completed. In addition, our business may be harmed to the extent that customers, suppliers or others believe that we cannot effectively compete in the marketplace without the merger or there is customer and employee uncertainty surrounding the future direction of the product and service offerings and strategy of Rational on a stand-alone basis. We also will be required to pay significant costs incurred in connection with the merger, including legal, accounting and financial advisory fees, whether or not the merger is completed. Moreover, under specified circumstances, we may be required to pay IBM a termination fee of $65 million in connection with the termination of the merger agreement.

27

ITEM 3
- Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk, including changes in interest rates and currency exchange rates. To manage the volatility relating to these exposures, we employ established policies and procedures to manage our exposure to fluctuations in interest rates and changes in known or forecasted currency exchange rates. As of December 31, 2002 no significant changes concerning market risk have occurred since our Annual Report on Form 10-K for the fiscal year ended March 31, 2002.

Foreign Currency Exchange Rate Risk

A portion of our business is conducted in currencies other than the U.S. dollar. Changes in the value of major foreign currencies relative to the local or "functional" currency of our subsidiaries or us may adversely affect operating results. We enter into short-term forward foreign exchange contracts designed to mitigate the impact of foreign currency exchange rate fluctuations on balance sheet exposures denominated in currencies other than the "functional" currency. The total amount of these contracts is approximately offset by the underlying assets and liabilities denominated in nonfunctional currencies. Forward contracts are accounted for on a mark-to-market basis. Gains and losses on forward contracts are recognized in our Consolidated Statements of Operations when the related transactions being hedged are recognized or the contracts mature. Such contracts meet the criteria established in SFAS 52, "Foreign Currency Translation for Hedge Accounting Treatment." We adopted SFAS 133, "Accounting for Derivative Instruments and Hedging Activities" in the first quarter of fiscal 2002. The adoption of SFAS 133 did not have a material impact on our financial position or results of operations. As we find it impractical to hedge all foreign currency exposures, we will continue to experience foreign currency gains and losses. We do not use derivative financial instruments for speculative trading purposes, nor do we hold or issue leveraged derivative financial instruments.

Interest Rate Risk

Our exposure to market-rate risk for changes in interest rates relates primarily to our investment portfolio. All our short-term investments are classified as available-for-sale and are recorded at amounts that approximate fair value based on quoted market prices. Realized gains and losses and declines in value judged to be other than temporary on available-for-sale securities are included in interest income. The cost of securities sold is based on the specific identification method. Unrealized gains on available-for-sale securities are included in accumulated other comprehensive income (loss), which is a separate component of stockholders' equity. Our Convertible Subordinated Notes were issued at a fixed interest rate and with fixed conversion rates and therefore do not expose us to the risk of earnings or cash flow loss due to change in market interest rates.

ITEM 4 - Controls and Procedures

Evaluation of disclosure controls and procedures. Based on their evaluation of our disclosure controls and procedures (as defined in Rules 13a-14(c) and 15d-14(c) under the Securities Exchange Act of 1934) as of a date within 90 days of the filing date of this Quarterly Report on Form 10-Q, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures are effective to ensure that information required to be disclosed by us in the reports that we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission.

Changes in internal controls. There were no significant changes in our internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation by our principal executive officer and principal financial officer, including any corrective actions with regard to significant deficiencies and material weaknesses.

PART II - OTHER INFORMATION
ITEM 1 - Legal Proceedings

On July 3, 2001, a purported derivative lawsuit, entitled Krim v. Levy, et al., No. CV799591 (Supr. Ct. Santa Clara Cty.), was filed. Defendants' demurrer to the complaint was sustained with leave to amend on September 18, 2001. An amended complaint was filed on September 24, 2001. The complaint names as defendants the Rational's Board of Directors and certain unnamed persons. Rational is a nominal defendant. The complaint alleges that defendants breached their fiduciary duties to Rational by deciding to invest in and to purchase Catapulse, Inc. The complaint seeks various equitable remedies and compensatory and special damages in unspecified amounts plus legal fees and costs from the defendants. The Court held a hearing on January 14, 2002 regarding the defendants' demurrer to the amended complaint. On January 22, 2002, the Court issued an order overruling defendants' demurrer. On September 18, 2002, the parties signed a Stipulation of Settlement that is subject to court approval. The terms of the settlement include a $2.675 million payment, $1 million of which is being funded by our Directors and Officers insurance carriers, and our agreement to adopt certain corporate governance procedures and controls. The settlement was approved and the action was dismissed with prejudice on November 26, 2002.

On December 11, 2002, an action, Gary Oblock and John Lowell vs. Rational Software Corp., et al., was filed in the Superior Court of the State of California for the County of Santa Clara. In this action, the plaintiffs named as defendants our board of directors and us. The complaint asserts claims on behalf of our public stockholders who are similarly situated with the plaintiffs. Among other things, the complaint alleges that we and the members of our board of directors have breached our and their fiduciary duties to our public stockholders, that our directors engaged in self-dealing in connection with approval of the merger, and that our directors failed to take steps to maximize our value to our public stockholders. The complaint seeks class certification and certain forms of equitable relief, including enjoining the consummation of the merger. On January 21, 2003, the Court denied plaintiffs' motion to for a temporary restraining order seeking to enjoin the January 22, 2003 shareholder vote concerning the IBM transaction. We continue to believe that the allegations are without merit and intend to vigorously contest the action. However, there can be no assurance that we or the other defendants will be successful in our or their defense.

From time to time, we are subject to legal claims. Historically, the cost of resolution of these claims has not been significant. However, any adverse outcome of current or future lawsuits against us may result in a material adverse effect on our financial condition.

ITEM 5 - Other Information

Section 10A(i)(2) of the Securities Exchange Act of 1934, as added in Section 202 of the Sarbanes-Oxley Act of 2002, requires us to disclose the approval by our Audit Committee of any non-audit services to be performed by our auditor. The Audit Committee of the Board of Directors of Rational has previously approved the performance of certain tax-related services by our auditor, Ernst & Young LLP.

ITEM 6 - Exhibits and Reports on Form 8-K
(a) Exhibits:

Exhibit No.

Description

99.1

Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.

(b) Reports on Form 8-K:

Report on Form 8-K dated December 9, 2002, containing (a) Rational's and International Business Machines Corporation's joint news release dated December 6, 2002, announcing the planned merger of International Business Machines Corporation and Rational, (b) the Agreement and Plan of Merger dated December 6, 2002, by and among International Business Machines Corporation, Barron Acquisition Corp. and Rational Software Corporation, and (c) Development and Reseller

Agreement dated as of December 6, 2002, between Rational Software Corporation and International Business Machines Corporation.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


	RATIONAL SOFTWARE CORPORATION


	(Registrant)


	By:	/s/ David J. Henshall



	David J. Henshall
	Vice President, Chief Financial Officer, Treasurer, and Secretary
	(Principal Financial Officer and Chief Accounting Officer) February 11, 2003

CERTIFICATIONS

I, Michael T. Devlin, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Rational Software Corporation;

2. Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;

3. Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4. The registrant's other certifying officers and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:

a) designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

b) evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and

c) presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;

5. The registrant's other certifying officers and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function):

a) all significant deficiencies in the design or operation of internal controls which could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls; and

6. The registrant's other certifying officers and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

              Dated:     February 11, 2003            By: /s/ Michael T. Devlin
                                                          -----------------------
                                                           Michael T. Devlin
                                                           Principal Executive Officer

I, David J. Henshall, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Rational Software Corporation;

b) evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and

c) presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;

b) any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls; and

              Dated:    February 11, 2003             By: /s/ David J. Henshall
                                                          ------------------------
                                                           David J. Henshall
                                                           Principal Financial Officer

EXHIBIT INDEX

Exhibit No.

Description

99.1

Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, As Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.

RATIONAL SOFTWARE CORP 10-Q