##### Table of Contents

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UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

---

Form
10-Q

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(Mark One)

x

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE PERIOD ENDED MARCH 31,
2003

OR

o

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: 000-33139

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THERASENSE, INC.

(Exact name of Registrant issuer as specified in its charter)

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| | Delaware(State or other jurisdiction ofincorporation or organization) |  | 94-3267373(I.R.S. EmployerIdentification No.) | 
| | --------------------------------------------------------------------- |  | --------------------------------------------- | 

1360 South Loop Road, Alameda, California(Address of principal executive
offices)

94502(Zip code)

(510) 749-5400(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 such reports) and (2) has been subject to such filing
requirements for the past 90 days.

Yes x No o

As of
May 1, 2003, Registrant had outstanding 41,079,187 shares of Common Stock, $0.001 par value.

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##### Table of Contents



THERASENSE, INC.QUARTERLY REPORT ON FORM 10-Q

TABLE OF CONTENTS



|         |  |                                                                                                   | PAGE
|-------- |  | ------------------------------------------------------------------------------------------------- | ----
|Part I:  |  | Financial Information                                                                             |     
|         |  |                                                                                                   |     
|Item 1.  |  | Condensed Consolidated Financial Statements (unaudited):                                          |     
|         |  | Condensed Consolidated Statements of Operationsfor the Three Months Ended March 31, 2003 and 2002 | 1   
|         |  | Condensed Consolidated Balance Sheetsat March 31, 2003 and December 31, 2002                      | 2   
|         |  | Condensed Consolidated Statements of Cash Flowsfor the Three Months Ended March 31, 2003 and 2002 | 3   
|         |  | Notes to Condensed Consolidated Financial Statements                                              | 4   
|Item 2.  |  | Managements Discussion and Analysis of Financial Condition and Results of Operations             | 7   
|Item 3.  |  | Quantitative and Qualitative Disclosures About Market Risk                                        | 22  
|Item 4.  |  | Controls and Procedures                                                                           | 22  
|         |  |                                                                                                   |     
|Part II: |  | Other Information                                                                                 |     
|         |  |                                                                                                   |     
|Item 1.  |  | Legal Proceedings                                                                                 | 23  
|Item 2.  |  | Changes in Securities and Use of Proceeds                                                         | 23  
|Item 3.  |  | Defaults Upon Senior Securities                                                                   | 23  
|Item 4.  |  | Submission of Matters to a Vote of Security Holders                                               | 23  
|Item 5.  |  | Other Information                                                                                 | 23  
|Item 6.  |  | Exhibits and Reports on Form 8-K                                                                  | 23  



|Signature | 26
|--------- | --
|          |   

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##### Table of Contents

PART I: FINANCIAL INFORMATION

ITEM 1.

CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

THERASENSE, INC.CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS(in thousands, except per share amounts)(unaudited)



|                                                                                       |  | Three Months EndedMarch 31, |       
|-------------------------------------------------------------------------------------- |  | --------------------------- | ------
|                                                                                       |  |                             |       
|                                                                                       |  | 2003                        |       
|                                                                                       |  |                             |       
|Total revenues                                                                         |  | $                           | 40,904
|Cost of revenues                                                                       |  |                             | 19,114
|                                                                                       |  |                             |       
|Gross profit                                                                           |  |                             | 21,790
|                                                                                       |  |                             |       
|Operating expenses:                                                                    |  |                             |       
|Research and development                                                               |  |                             | 5,166 
|Selling, general and administrative                                                    |  |                             | 25,280
|                                                                                       |  |                             |       
|Total operating expenses                                                               |  |                             | 30,446
|                                                                                       |  |                             |       
|Loss from operations                                                                   |  |                             | (8,656
|Interest income, net                                                                   |  |                             | 117   
|                                                                                       |  |                             |       
|Net loss                                                                               |  | $                           | (8,539
|                                                                                       |  |                             |       
|Net loss per common share, basic and diluted                                           |  | $                           | (0.21)
|                                                                                       |  |                             |       
|Weighted-average shares used in computing net loss per common share, basic and diluted |  |                             | 40,831
|                                                                                       |  |                             |       

The accompanying notes are an integral part of these condensed consolidated
financial statements.

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THERASENSE, INC.CONDENSED CONSOLIDATED BALANCE SHEETS(in thousands)



|                                           |  | March 31,2003 |          | December 31,2002 |  
|------------------------------------------ |  | ------------- | -------- | ---------------- | -
|                                           |  |               |          |                  |  
|                                           |  | (unaudited)   |          | (Note 1)         |  
|                                           |  |               |          |                  |  
|Assets                                     |  |               |          |                  |  
|Current assets:                            |  |               |          |                  |  
|Cash and cash equivalents                  |  | $             | 35,024   |                  | $
|Available-for-sale investments             |  |               | 40,254   |                  |  
|Accounts receivable, net                   |  |               | 40,183   |                  |  
|Inventories                                |  |               | 19,346   |                  |  
|Prepaid expenses and other current assets  |  |               | 3,053    |                  |  
|                                           |  |               |          |                  |  
|Total current assets                       |  |               | 137,860  |                  |  
|Available-for-sale investments             |  |               | 3,644    |                  |  
|Property and equipment, net                |  |               | 15,724   |                  |  
|Other assets                               |  |               | 4,978    |                  |  
|                                           |  |               |          |                  |  
|Total assets                               |  | $             | 162,206  |                  | $
|                                           |  |               |          |                  |  
|                                           |  |               |          |                  |  
|Liabilities and stockholders equity       |  |               |          |                  |  
|Current liabilities:                       |  |               |          |                  |  
|Accounts payable                           |  | $             | 15,090   |                  | $
|Accrued liabilities                        |  |               | 13,729   |                  |  
|Deferred revenue                           |  |               | 3,649    |                  |  
|Current portion of long-term debt          |  |               | 4,458    |                  |  
|                                           |  |               |          |                  |  
|Total current liabilities                  |  |               | 36,926   |                  |  
|Long-term debt, net of current             |  |               | 2,767    |                  |  
|Deferred revenue                           |  |               | 13,752   |                  |  
|Other liabilities                          |  |               |         |                  |  
|                                           |  |               |          |                  |  
|Total liabilities                          |  |               | 53,445   |                  |  
|                                           |  |               |          |                  |  
|Stockholders equity:                      |  |               |          |                  |  
|Common stock                               |  |               | 41       |                  |  
|Additional paid-in capital                 |  |               | 271,340  |                  |  
|Notes receivable from stockholders         |  |               | (20      | )                |  
|Deferred stock-based compensation, net     |  |               | (9,649   | )                |  
|Accumulated other comprehensive income     |  |               | 340      |                  |  
|Accumulated deficit                        |  |               | (153,291 | )                |  
|                                           |  |               |          |                  |  
|Total stockholders equity                 |  |               | 108,761  |                  |  
|                                           |  |               |          |                  |  
|Total liabilities and stockholders equity |  | $             | 162,206  |                  | $
|                                           |  |               |          |                  |  

(1)

The balance sheet at December 31, 2002 has been derived from the audited financial statement at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States of
America for complete financial statements.

The accompanying notes are an integral part of these condensed consolidated financial statements.

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THERASENSE, INC.CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS(in thousands)(unaudited)



|                                                                                          |  | Three Months EndedMarch 31, |        
|----------------------------------------------------------------------------------------- |  | --------------------------- | -------
|                                                                                          |  |                             |        
|                                                                                          |  | 2003                        |        
|                                                                                          |  |                             |        
|Cash flows from operating activities:                                                     |  |                             |        
|Net loss                                                                                  |  | $                           | (8,539 
|Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |                             |        
|Depreciation and amortization                                                             |  |                             | 1,002  
|Amortization of deferred stock-based compensation                                         |  |                             | 1,381  
|Other                                                                                     |  |                             |       
|Changes in operating assets and liabilities:                                              |  |                             |        
|Accounts receivable                                                                       |  |                             | (3,864 
|Inventories                                                                               |  |                             | 1,714  
|Deferred cost of products sold                                                            |  |                             |       
|Prepaid expenses and other current assets                                                 |  |                             | 3,306  
|Other assets                                                                              |  |                             | 238    
|Accounts payable                                                                          |  |                             | (1,944 
|Accrued and other liabilities                                                             |  |                             | (2,881 
|Deferred revenue                                                                          |  |                             | 14,140 
|                                                                                          |  |                             |        
|Net cash provided by (used in) operating activities                                       |  |                             | 4,553  
|                                                                                          |  |                             |        
|Cash flows from investing activities:                                                     |  |                             |        
|Proceeds from maturities of investments                                                   |  |                             | 36,035 
|Purchases of investments                                                                  |  |                             | (34,669
|Purchases of property and equipment                                                       |  |                             | (2,387 
|                                                                                          |  |                             |        
|Net cash used in investing activities                                                     |  |                             | (1,021 
|                                                                                          |  |                             |        
|Cash flows from financing activities:                                                     |  |                             |        
|Proceeds from exercise of stock options                                                   |  |                             | 170    
|Principal payments on long-term debt                                                      |  |                             | (1,083 
|Repayment of notes receivable from stockholders                                           |  |                             | 135    
|                                                                                          |  |                             |        
|Net cash used in financing activities                                                     |  |                             | (778   
|                                                                                          |  |                             |        
|Effect of foreign exchange rate changes on cash and cash equivalents                      |  |                             | 112    
|                                                                                          |  |                             |        
|Net change in cash and cash equivalents                                                   |  |                             | 2,866  
|Cash and cash equivalents, beginning of period                                            |  |                             | 32,158 
|                                                                                          |  |                             |        
|Cash and cash equivalents, end of period                                                  |  | $                           | 35,024 
|                                                                                          |  |                             |        

The accompanying notes are an integral part of these condensed consolidated
financial statements.

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##### Table of Contents

THERASENSE, INC.NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(unaudited)

NOTE 1
Basis of Presentation Policies:

The accompanying unaudited condensed consolidated financial statements of TheraSense, Inc. and its subsidiaries (TheraSense
or the Company) have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and pursuant to the instructions to Form 10-Q and Article 10 of Regulation
S-X of the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all
adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three month period ended March 31, 2003 are not necessarily indicative of the results that may be
expected for the year ending December 31, 2003, or for any future period. These financial statements and notes should be read in conjunction with the financial statements and notes thereto for the year ended December 31, 2002 included in the
Companys Form 10-K for the year ended December 31, 2002.

NOTE 2  Summary of Significant Accounting Policies:

The Companys significant accounting policies are disclosed in the Companys Annual Report on Form 10-K for the year ended December 31, 2002 that was filed with the Securities and Exchange Commission on March
27, 2003. The Companys significant accounting policies have not materially changed since December 31, 2002.

NOTE 3 - Recent Accounting Pronouncements:

In January 2003, the Financial Accounting Standards Board (FASB) issued FASB Interpretation No. 46 (FIN 46), Consolidation of Variable Interest Entities, an
Interpretation of ARB No. 51. FIN 46 requires certain variable interest entities to be consolidated by the primary beneficiary of the entity if the equity investors in the entity do not have the characteristics of a controlling financial
interest or do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from other parties. FIN 46 is effective immediately for all new variable interest entities created or
acquired after January 31, 2003. For variable interest entities created or acquired prior to February 1, 2003, the provisions of FIN 46 must be applied for the first interim or annual period beginning after June 15, 2003. The Company is currently
evaluating the impact that the adoption of FIN 46 will have on its consolidated financial statements.

NOTE 4 - Net Loss Per Share:

Basic net loss per common share is computed by dividing net loss by the weighted-average number of vested common shares outstanding for the period. Diluted net loss per share is computed giving effect
to all potential dilutive common stock, including options and warrants. Options, warrants and common stock subject to repurchase were not included in the computation of diluted net loss per common share because the effect would be antidilutive.

A reconciliation of the numerator and denominator used in the calculation of basic and diluted net loss per common share follows (in thousands):



|                                                    |  | Three Months EndedMarch 31, |       
|--------------------------------------------------- |  | --------------------------- | ------
|                                                    |  |                             |       
|                                                    |  | 2003                        |       
|                                                    |  |                             |       
|Numerator:                                          |  |                             |       
|Net loss                                            |  | $                           | (8,539
|                                                    |  |                             |       
|Denominator:                                        |  |                             |       
|Weighted-average common stock outstanding           |  |                             | 40,837
|Less: Weighted-average shares subject to repurchase |  |                             | (6    

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THERASENSE, INC.NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(unaudited)



|                                                                                      |  |  |        |  |  |        | 
|------------------------------------------------------------------------------------- |  |  | ------ |  |  | ------ | 
|                                                                                      |  |  |        |  |  |        | 
|Weighted-average shares used in computing basic and diluted net loss per common share |  |  | 40,831 |  |  | 39,429 | 
|                                                                                      |  |  |        |  |  |        | 

The following outstanding options, common stock subject to repurchase and warrants were excluded from
the computation of diluted net loss per common share as they had an antidilutive effect (in thousands):



|                                   |  | March 31, | 
|---------------------------------- |  | --------- | 
|                                   |  |           | 
|                                   |  | 2003      | 
|                                   |  |           | 
|Options to purchase common stock   |  | 7,566     | 
|Common stock subject to repurchase |  | 4         | 
|Warrants                           |  |          | 

NOTE 5 - Inventories:

At March 31, 2003 and
December 31, 2002, inventories consisted of the following (in thousands):



|                |  | March 31, 2003 |        | December 31, 2002 |  
|--------------- |  | -------------- | ------ | ----------------- | -
|                |  |                |        |                   |  
|Raw materials   |  | $              | 4,238  |                   | $
|Work-in-process |  |                | 3,378  |                   |  
|Finished goods  |  |                | 11,730 |                   |  
|                |  |                |        |                   |  
|                |  | $              | 19,346 |                   | $
|                |  |                |        |                   |  

NOTE 6 - Accrued product warranties:

The Companys condensed consolidated financial statements include accruals for product warranty claims. The Company provides a five-year warranty on its products. For proper matching of these costs in the period
that revenues are recognized, an estimated warranty expense accrual rate is determined based on historical experience. Such costs are accrued at the time revenue is recognized. At March 31, 2003 and December 31, 2002, accrued product warranties
totaled $1,874,954 and $1,931,935, respectively, and are included in accrued liabilities in the accompanying condensed consolidated balance sheets.

A tabular
reconciliation of the changes in the Companys product warranty liability for the three months ended March 31, 2003 is as follows (in thousands):



|Balance at January 1, 2003                       |  | $ | 1,932 |  
|------------------------------------------------ |  | - | ----- | -
|Accruals for warranties issued during the period |  |   | 467   |  
|Settlements made during the period               |  |   | (524  | )
|                                                 |  |   |       |  
|Balance at March 31, 2003                        |  | $ | 1,875 |  
|                                                 |  |   |       |  

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THERASENSE, INC.NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS(unaudited)

NOTE 7  Revolving Line of Credit Agreement:

In May 2002, the Company entered into a revolving line of credit agreement with a lending company, which was amended and restated in December 2002. Under the terms of the credit
agreement, amounts the Company borrows from the lending company are repaid to the lending company directly by the Companys accounts receivable debtors. Outstanding amounts owed to the lending company under the credit agreement are
collateralized by all of the Companys assets excluding the Companys intellectual property assets. The maximum amount the Company may borrow from the lending company is based on our eligible accounts receivable and cannot exceed $15.0
million. All outstanding amounts bear interest at the prime rate plus 0.5%. The amended and restated credit agreement includes certain covenants requiring minimum liquidity and minimum net income over time. The Company is not currently in compliance
with certain of these covenants. The Company is currently negotiating an amendment to the amended and restated credit and security agreement that would bring us into compliance with these covenants. As of March 31, 2003, $2.4 million in principal
was outstanding under the credit agreement.

NOTE 8  Accounting for Stock-Based Compensation:

In
December 2002, the Financial Accounting Standards Board (FASB) issued Statement of Financial Accounting Standards (SFAS) No. 148 (SFAS No. 148), Accounting for Stock Based Compensation, Transition and
Disclosure, an amendment of FASB Statement No. 123, which amends FASB Statement No. 123, (SFAS No. 123), Accounting for Stock-Based Compensation. SFAS No. 148 requires more prominent disclosures in both annual and
interim financial statements about the method of accounting and effects of stock-based compensation on reported results. The Company uses the intrinsic value method of Accounting Principles Board Opinion No. 25 (APB No. 25),
Accounting for Stock Issued to Employees, in accounting for its employee stock options, and presents disclosure of pro forma information required under SFAS No. 123, as amended by SFAS No. 148.The following table provides a reconciliation of net loss to pro forma net loss as if the fair value method has been applied to all employee stock options outstanding as of the dates indicated below (in
thousands, except per share amounts):

|                                                                                                                   |   | Three Months Ended March 31, 2003 |   |  | Three Months Ended March 31, 2002 |        
|------------------------------------------------------------------------------------------------------------------ | - | --------------------------------- | - |  | --------------------------------- | -------
|                                                                                                                   |  
|                                                                                                                   |   | (unaudited)                       |   |  | (unaudited)                       |        
|Net loss as reported                                                                                               | $ | (8,539                            | ) |  | $                                 | (10,985
|                                                                                                                   |   |                                   |   |  |                                   |        
|Add: Stock-based employee compensation expense included in reported net loss                                       |   | 1,381                             |   |  |                                   | 1,508  
|                                                                                                                   |   |                                   |   |  |                                   |        
|Deduct : Total stock-based employee  compensation expense determined under fair  value based method for all awards |   | (2,749                            | ) |  |                                   | (6,056 
|                                                                                                                   |   |                                   |   |  |                                  
|Pro forma net loss                                                                                                 | $ | (9,907                            | ) |  | $                                 | (15,533
|                                                                                                                   |   |                                   |   |  |                                  
|                                                                                                                   |   |                                   |   |  |                                   |        
|Weighted average shares used in computing net loss per common share, basic and diluted                             |   | 40,831                            |   |  |                                   | 39,429 
|Net loss per share, basic and diluted  As reported                                                                 | $ | (0.21                             | ) |  | $                                 | (0.28  
|Pro forma                                                                                                          | $ | (0.24                             | ) |  | $                                 | (0.39  
|                                                                                                                   |   |                                   |   |  |                                  

The Company accounts for equity instruments issued to non-employees in accordance with
the provisions of SFAS No. 123 and Emerging Issues Task Force Issue No. 96-18, Accounting for Equity Instruments That Are Issued to Other Than Employees for Acquiring, or in Conjunction with Selling, Goods or Services, which require that
these equity instruments are recorded at their fair value on the measurement date. The measurement of stock-based compensation is subject to periodic adjustment as the underlying equity instruments vest.

NOTE 9  Subsequent Events:

In March 2002, the Company
entered into an arrangement to finance the purchase of certain equipment the Company uses to manufacture its FreeStyle test strips with its supplier of test strip packaging vials. The purchase price of the equipment is approximately $1,600,000. From
March 2002 to March 2003, the Company paid down the equipment purchase price to the supplier through a portion of the purchase price for each packaging vial purchased from the supplier. In April 2003, the Company paid the remaining purchase price of
approximately $1,500,000 for the equipment to the supplier and took title to the equipment.

During 1998, the Company entered into an
equipment line of credit agreement with a lending company under which the Company could borrow up to $2,500,000 for equipment purchases prior to December 31, 1999. Prior to December 31, 1999, the Company borrowed a total of approximately $580,000
under this arrangement. During 1999, the Company entered into a subordinated debt agreement with this lending company under which the Company could borrow up to $5,000,000 for equipment purchases prior to July 7, 2000. Prior to July 7, 2000, the
Company borrowed a total of $5,000,000 under this arrangement. In April 2003, the Company and the lending company entered into an agreement pursuant to which the Company paid $844,451 as a compromised and final payment of all amounts outstanding
under these arrangements, and the Company took title to all of the equipment that had been leased pursuant to these arrangements. The gain recorded from the compromised and final payment is not significant.

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ITEM 2.

MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Managements Discussion and Analysis of
Financial Condition and Results of Operations and other parts of this report contain forward-looking statements that involve risks and uncertainties. These statements typically may be identified by the use of forward-looking words or phrases such as
believe, expect, intend, anticipate, should, planned, estimated, and potential, among others. All forward-looking statements included in this document
are based on our current expectations, and we assume no obligation to update any such forward-looking statements. The Private Securities Litigation Reform Act of 1995 provides a safe harbor for such forward-looking statements. In order
to comply with the terms of the safe harbor, we note that a variety of factors could cause actual results and experience to differ materially from the anticipated results or other expectations expressed in such forward-looking statements. The risks
and uncertainties that may affect the operations, performance, development, and results of our businesses include but are not limited to: (1) our history of losses and variable quarterly results; (2) our dependence on FreeStyle for future revenues;
(3) our limited sales and marketing experience; (4) substantial competition; (5) risks related to failure to protect our intellectual property and litigation in which we may become involved; (6) risks relating to development of innovative products;
(7) risks related to noncompliance with FDA regulations; (8) limited manufacturing experience and our reliance on single manufacturers and sole source suppliers; and (9) other factors that are described from time to time in our periodic filings with
the Securities and Exchange Commission, including those set forth in this filing as Risk Factors Affecting Operations and Future Results.

All percentage
amounts and ratios were calculated using the underlying data in thousands. Operating results for the three-month period ended March 31, 2003, are not necessarily indicative of the results that may be expected for any future period.

Overview

We develop, manufacture and sell easy to use glucose self-monitoring systems that dramatically reduce
the pain of testing for people with diabetes. Our first product, FreeStyle, received FDA clearance in January 2000, and we commenced commercial shipments in the United States in June 2000. We sell FreeStyle in the United States and Canada through
national retailers and wholesalers, and directly to consumers over the telephone and through our website. In March 2001, we obtained the CE Mark for FreeStyle, and our European distributor commenced sales of FreeStyle in Germany and Sweden in May
2001 and commenced sales of FreeStyle in Finland, Austria, Norway, the Netherlands, Denmark, Switzerland, France, Italy and Belgium since that time. In January 2002, we obtained regulatory approval to market FreeStyle in Japan, and our Japanese
distributor launched FreeStyle in Japan in February 2002. We also sell FreeStyle in the United Kingdom through retailers and wholesalers. Our sales of FreeStyle products in Canada and the United Kingdom are through a wholly-owned subsidiary in each
country.

We manufacture our disposable test strips ourselves at our facility in Alameda, California. We outsource the manufacturing, packaging and testing of our FreeStyle meters
to Flextronics International Ltd., an electronics contract manufacturer. Our FreeStyle lancing device and disposable lancets are manufactured by Facet Technologies LLC, a wholly-owned subsidiary of Matria Healthcare, Inc. Our distribution services
are performed by UPS Supply Chain Management f/d/b/a Livingston Health Care Systems Inc., a division of UPS Global Logistics.

Manufacturers typically sell their glucose
monitoring system kits at discounts to list prices, offer customer rebates or provide free product samples to expand their installed base of monitoring devices and thus increase the market for their disposable test strips and lancets. We currently
distribute the FreeStyle System kit at a financial loss due in part to samples, discounts and rebates to establish an installed base of systems from which we expect to generate recurring revenues from our disposable FreeStyle test strips and
lancets. We have been offering and expect to continue to offer similar discounts and rebates on, and free samples of, our FreeStyle System kits. In the event we establish a large installed base of systems, we expect to generate an increasing portion
of our revenues through recurring sales of our FreeStyle test strips.

Revenues are generated from sales of our FreeStyle System kit and from the recurring sales of disposable
FreeStyle test strips and lancets. We recognize revenue on these products upon shipment. Generally, our sales terms to retailers and wholesalers provide for customer payment within 60 days of shipment on initial orders and payment within 30 days for
subsequent orders. However, we have occasionally granted longer credit terms to match our competitors. We perform ongoing credit evaluations of our customers financial condition and, generally, require no collateral from our customers. We
believe our terms to retailers, wholesalers and end users, including rights to return and payment terms, are similar to our competitors terms.

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##### Table of Contents

We have incurred significant operating losses and negative cash flows from operations since inception. We incurred net losses of $43.6 million in 2000, $52.9
million in 2001, $29.2 million in 2002 and $8.5 million for the three months ended March 31, 2003. As of March 31, 2003 we had an accumulated deficit of $153.3 million. We will need to continue to increase product revenues and reduce product costs
to achieve profitability.

Cost of revenues consists primarily of:



payments to our manufacturing and distribution partners;



expenses relating to our disposable test strip manufacturing;



expenses relating to our internal
operations;



expenses relating to our
five-year warranty on our FreeStyle meter;



royalties payable under technology licenses; and



amortization of deferred stock-based compensation.

Research and development expenses include costs
associated with the design, development and testing of our products. All research and development costs are expensed as incurred. These costs consist primarily of:



salaries and related personnel expenses;



fees paid to outside service providers;



expenditures for purchases of laboratory supplies and clinical trials;



overhead allocated to product development;
and



amortization of deferred stock-based
compensation.

Selling, general and administrative expenses primarily consist of:



salaries, commissions and related expenses for personnel engaged in sales, marketing, customer service and administrative
functions;



costs associated with
advertising, product sampling, trade shows, promotional and other marketing activities;



general corporate expenses;



legal and regulatory expenses; and



amortization of deferred stock-based compensation.

We estimate the uncollectability of our accounts
receivable. In doing so, we analyze historical bad debts, customer concentrations, customer credit-worthiness, current economic trends and changes in customer payment terms.

We
have recorded deferred stock-based compensation in connection with stock option grants and sales of restricted stock to employees at exercise or sales prices below the deemed fair market value of our common stock. Deferred stock-based compensation
for options granted to non-employees has been determined as the fair value of the equity instruments issued. Deferred stock-based compensation for options granted to non-employees is periodically remeasured as the underlying options vest. As of
March 31, 2003 we have recorded aggregate deferred stock-based compensation of $24.5 million, of which $9.6 million remains and will be amortized to expense on a straight-line basis through 2005. This amount is being amortized over the respective
vesting periods of these equity instruments, which is typically four years. Stock-based compensation expense has been allocated according to employees and their respective departments and by function for non-employees.

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Critical Accounting Policies and Estimates

Our critical accounting policies
and estimates are disclosed in the our Annual Report on Form 10-K for the year ended December 31, 2002 that was filed with the Securities and Exchange Commission on March 27, 2003. Our critical accounting policies and estimates have not materially
changed since December 31, 2002.

Results of Operations

The following table sets forth, for the
periods indicated, the percentage of total revenues represented by certain items reflected in our condensed consolidated statements of operations:



|                                    | Three Months EndedMarch 31 |   
|----------------------------------- | -------------------------- | --
|                                    |                            |   
|                                    | 2003                       |   
|                                    |                            |   
|Total revenues                      | 100.0                      | % 
|Cost of revenues                    | 46.7                       |   
|                                    |                            |   
|Gross profit                        | 53.3                       |   
|                                    |                            |   
|Operating expenses:                 |                            |   
|Research and development            | 12.6                       |   
|Selling, general and administrative | 61.8                       |   
|                                    |                            |   
|Total operating expenses            | 74.4                       |   
|                                    |                            |   
|Loss from operations                | (21.2                      | ) 
|Interest income                     | 1.0                        |   
|Interest and other expense          | (0.7                       | ) 
|                                    |                            |   
|Net loss                            | (20.9                      | %)
|                                    |                            |   

Three Months Ended March 31, 2003 and 2002

Revenues.Total revenues were $40.9 million for the three months ended March 31, 2003 as compared to $33.3 million for the comparable period in 2002, an increase of 22.8%. The increase
was due primarily to greater sales of FreeStyle System kits and Freestyle test strips in all channels. During the three months ended March 31, 2003, we recognized revenues of $0.6 million relating to the $15.0 million payment we received from the
Disetronic Group in January 2003 in connection with the amendment of our international distributor agreement. The balance of the $15.0 million payment is reflected in the current and long-term deferred revenue line items of our consolidated balance
sheet. Four of our customers, Disetronic, Walgreens, McKesson and AmerisourceBergen individually accounted for more than 10% and collectively 45% of our revenues for the three months ended March 31, 2003. Only our European distributor, Disetronic,
individually accounted for more than 10% of our total revenues for the three months ended March 31, 2002.

Cost of revenues.Cost of revenues
increased to $19.1 million for the three months ended March 31, 2003 from $18.4 million for the three months ended March 31, 2002, representing an increase of $0.7 million or 3.8%. This increase is attributable to higher revenues versus the
comparable period in 2002. Amortization of stock-based compensation expense reported in cost of revenues for the three months ended March 31, 2003 was $0.1 million, as compared to $0.2 million for the three months ended March 31, 2002.

Gross profit.Gross profit increased to $21.8 million for the three months ended March 31, 2003 from $14.9 million for the three months ended March 31, 2002,
representing an increase of $6.9 million or 46.3%. Our gross margin for the three months ended March 31, 2003 improved to 53.3% from a gross margin of 44.7% for the three months ended March 31, 2002. Our improved gross margin and gross profit
resulted from test strip revenue composing a greater proportion of total revenue, fixed costs being spread over larger sales volumes and reduced test strip and system kit manufacturing costs. Our gross margin was favorably impacted by the
recognition of the $0.6 million of revenue during the three month period ended March 31, 2003.

Research and development expenses.Research and development expenses increased to $5.2 million for the three

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months ended March 31, 2003 from $4.4 million for the three months ended March 31, 2002, representing an increase of $0.8 million, or 18%. This increase was
primarily attributable to the hiring of additional personnel and increased spending on product development efforts. Amortization of deferred stock-based compensation was $0.3 million for both three month periods ended March 31, 2003 and 2002. We
expect research and development spending to increase over the next several years as we increase clinical trials for our Continuous Glucose Monitoring System and expand our research and development activities to support our current and future
products.

Selling, general and administrative expenses.Selling, general and administrative expenses increased to
$25.3 million for the three months ended March 31, 2003 from $21.9 million for the three months ended March 31, 2002, representing an increase of $3.4 million, or 16%. This increase was attributable to increased product marketing and promotional
activity in the United States and expenses associated with our international sales subsidiaries in the three months ended March 31, 2003. Amortization of deferred stock-based compensation was $1.0 million for both three month periods ended March 31,
2003 and 2002. We expect our selling, general and administrative expenses to increase as we increase product sampling and increase our marketing and promotional activities.

Interest income.Interest income decreased to $0.4 million for the three months ended March 31, 2003 from $0.7 million for the three months ended March 31, 2002. This decrease was
primarily attributable to lower cash, cash equivalents, and investment balances, as we used cash in our operations. Cash, cash equivalents and investments at March 31, 2003 were $78.9 million compared to $117.3 million at March 31, 2002.

Interest and other expense.Interest and other expense has remained at approximately $0.3 million for both three month periods
ended March 31, 2003 and 2002. Interest expense reflects the interest on borrowings under available lines of credit, amortization of debt issuance costs associated with warrants issued in connection with lines of credit and capital lease obligations
arising under a particular sale and leaseback transaction.

Liquidity and Capital Resources

On
October 17, 2001 we consummated our initial public offering of common stock in which we received net proceeds of $120.9 million. Previously, we have financed our operations primarily through private placements of convertible preferred stock
resulting in net proceeds of $119.2 million. We have also financed our operations through equipment financing arrangements and capital leases with $7.2 million in principal outstanding at March 31, 2003.

As of March 31, 2003, our principal debt arrangements included a $2.5 million equipment line of credit at effective interest rates between 8.5% and 9.5% per annum and a $2.0 million senior loan and security agreement at
an effective interest rate of 13.1% per annum with a lending company. These effective annual interest rates include the amortization of the fair value of warrants issued to one of this lending company. In April 2003, we entered into an agreement
with this lending company pursuant to which we paid $844,451 to the lending company as a compromised and final payment of all amounts outstanding under these arrangement, and we took title to all of the equipment that had been leased pursuant to
these arrangements. Our current principal debt arrangements include a $3.0 million equipment line of credit at an interest rate of 7.28% with a lending company.

In March 2002, we
entered into an arrangement to finance the purchase of certain equipment we use to manufacture our FreeStyle test strips with our supplier of test strip packaging vials. The purchase price of the equipment is approximately $1.6 million. From March
2002 to March 2003, we paid down the equipment purchase price to the supplier through a portion of the purchase price for each packaging vial purchased from the supplier. In April 2003, we paid the remaining purchase price of approximately $1.5
million for the equipment to the supplier and took title to the equipment.

In May 2002, we entered into a revolving line of credit agreement with a lending company, which was
amended and restated in December 2002. Under the terms of the credit agreement, amounts we borrow from the lending company are repaid to the lending company directly by our accounts receivable debtors. Outstanding amounts owed to the lending company
under the credit agreement are collateralized by all of our assets excluding our intellectual property assets. The maximum amount we may borrow from the lending company is based on our eligible accounts receivable and cannot exceed $15.0 million.
All outstanding amounts bear interest at the prime rate plus 0.5%. The amended and restated credit agreement includes certain covenants requiring minimum liquidity and minimum net income over time. We are not currently in compliance with certain of
these covenants. We are currently negotiating an amendment to the amended and restated credit and security agreement that would bring us into compliance with these covenants. As of March 31, 2003, $2.4 million in principal was outstanding under the
credit agreement.

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In January 2003, we received a $15.0 million payment from Disetronic, our European distributor, pursuant to the amendment of our international distributor
agreement. We are recognizing this payment as revenue over the term of the international distributor agreement, which expires in December 2006, if not terminated earlier. In the three months ended March 31, 2003, we recognized revenue of $0.6
million from this payment.

As of March 31, 2003, we had cash, cash equivalents and investments of $78.9 million.

Cash provided by or used in operating activities.Net cash provided by operating activities was approximately $4.6 million for the three months ended March 31, 2003 primarily resulting
from the $15.0 million payment from Disetronic, our European distributor in January 2003 pursuant to the amendment of our international distributor agreement. Decreases in inventories of $1.7 million and in prepaid expenses and other assets of $3.5
million were offset by increases in accounts receivable of $3.9 million, reduction of accounts payable of $1.9 million and reduction of accrued liabilities of $2.9 million. Inventories decreased as we sold the inventory manufactured in the quarter
ended December 31, 2002. Accounts receivable largely increased due to a higher percentage of shipments occurring in the last month of the quarter compared to the quarter ended December 31, 2002. Accrued liabilities decreased as we paid royalties and
bonuses that were accrued at the end of 2002. For the three months ended March 31, 2002, cash used in operations were $27.4 million. The difference between our net loss and our net cash used in operating activities reflected increases in accounts
receivable and inventories of $8.3 million as well as decreases in accounts payable and accrued liabilities of $9.9 million. The increase in inventories during the three months ended March 31, 2002 occurred to support planned revenue growth for
upcoming quarters, including international expansion into Canada via our wholly-owned subsidiary. The decrease in accounts payable reflected a return to a more normalized balance, based on current business operations, from a balance at December 31,
2001 that was substantially higher than previous levels. The balance in accounts payable at December 31, 2001 included amounts due for the manufacture of a large number system kits manufactured in December 2001. There were no significant changes in
vendor payment terms and practices during the three month period ended March 31, 2003. The decrease in accrued liabilities during the three month period ended March 31, 2003 reflected semiannual royalty payments under our principal licensing
agreements and bonus payments to our employees under the 2002 incentive plan.

Cash used in investing activities.Net cash used in investing
activities was approximately $1.0 million and $45.5 million for the three month periods ended March 31, 2003 and 2002, respectively. For the period ended March 31, 2003, investing activities consisted of capital expenditures of $2.4 million, mainly
for the new building, offset by proceeds from maturities of investments, net, of $1.4 million. For the period ended March 31, 2002, investing activities consisted of capital expenditures of $1.8 million for manufacturing equipment used in the
production of our disposable test strips, as we increased production capacity to meet planned growth and by purchases of investments of $43.8 million.

Cash used in
financing activities.Net cash used in financing activities for the three months ended March 31, 2003 of $0.8 million was primarily attributable to principal payments on long-term debt and lines of credit of $1.1 million
offset by $0.2 million from proceeds from the exercise of stock options, and from the repayment of notes receivable from stockholders of $0.1 million. Net cash used in financing activities for the three months ended March 31, 2002 of $0.7 million
was primarily attributable to principal payments on long-term debt of $0.8 million offset by $0.1 million from proceeds from the exercise of stock options.

We expect to have
negative cash flows from operations for most of 2003. We also expect increased sales and marketing expenses related to the promotion of FreeStyle, increased research and development expenses, as well as expenses for additional personnel and product
enhancement efforts. Our future capital requirements will depend on a number of factors, including market acceptance of Freestyle, the resources we devote to developing and supporting our products, continued progress of our research and development
of potential products, the need to acquire licenses to technology and the availability of other financing. Our capital expenditure for the three months ended March 31, 2003 was $2.4 million, and we believe that our capital expenditure for the next 9
months will remain in line with our 2002 expenditure. We believe that our current cash, cash equivalents and investment balances, together with the revenue to be derived from sales of Freestyle, will be sufficient to fund our operations until we
become profitable. To the extent our capital resources are insufficient to meet our future capital requirements, we would need to raise additional capital or incur additional indebtedness to fund our operations. Additional equity or debt financing,
if required, may not be available on acceptable terms, or at all. If we are unable to obtain additional capital, we may be required to reduce our selling and marketing activities for Freestyle, delay, reduce the scope of or eliminate our research
and development programs, or relinquish rights to technologies or products that we might otherwise seek to develop or commercialize. In the event that we do raise additional equity financing, investors will be further diluted.

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In the event we incur additional indebtedness to fund our operations, we may have to grant the lender a security interest in our assets.

Inflation

The impact of inflation on our business has not been material to date.

Recently Issued Accounting Pronouncements

In January 2003, the Financial Accounting Standards Board (FASB)
issued FASB Interpretation No. 46 (FIN 46), Consolidation of Variable Interest Entities, an Interpretation of ARB No. 51. FIN 46 requires certain variable interest entities to be consolidated by the primary beneficiary of the
entity if the equity investors in the entity do not have the characteristics of a controlling financial interest or do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support from
other parties. FIN 46 is effective immediately for all new variable interest entities created or acquired after January 31, 2003. For variable interest entities created or acquired prior to February 1, 2003, the provisions of FIN 46 must be applied
for the first interim or annual period beginning after June 15, 2003. We are currently evaluating the impact that the adoption of FIN 46 will have on our consolidated financial statements.

RISK FACTORS AFFECTING OPERATIONS AND FUTURE RESULTS

We have a history of net losses and variable quarterly results and may never
achieve or maintain profitability.

We have incurred losses every year since 1997. We incurred losses of $43.6 million in 2000, $52.9 million
in 2001, $29.2 million in 2002 and $8.5 million for the three months ended March 31, 2003. As of March 31, 2003, we had an accumulated deficit of approximately $153.3 million. We will need to continue to increase product revenues and reduce product
costs to achieve profitability. We may be unable to do so, and therefore, may never achieve profitability. Even if we do achieve profitability, we may not be able to sustain or increase profitability on a quarterly or annual basis. As a relatively
new entrant to the blood glucose monitoring market that has been experiencing rapid growth, revenues can vary from quarter to quarter due to various factors, including:



changes in customer stocking and inventory levels;



the timing of promotions and price changes by us or
our competitors; and



new product
introductions or enhancements by us or our competitors.

We maintain a limited inventory of finished goods and typically ship products within a short period after orders are
received. Historically, customer buying patterns and our revenue growth have caused a substantial portion of our revenues to occur in the last month of the quarter. Delays in the receipt of orders or the manufacture of product near the end of the
quarter could cause quarterly revenues to fall short of anticipated levels. Because our operating expenses are based on anticipated revenue levels and a high percentage of our expenses are relatively fixed, less than anticipated revenues for a
quarter could have a significant adverse impact on our operating results.

We expect to derive substantially all of our future revenue from sales of FreeStyle and this product
could fail to generate significant revenues.

Currently, the primary products we market are the FreeStyle test strips, FreeStyle System kit and FreeStyle lancets, all of which
we commercially introduced in June 2000. Our FreeStyle products are expected to account for substantially all of our revenues for the next several years. Accordingly, our success depends upon the acceptance by people with diabetes, as well as health
care providers and third-party payors of FreeStyle as a preferred blood glucose self-monitoring device. Relative to the overall size of the blood glucose monitoring market, a limited number of people have used FreeStyle, and people with diabetes or
the medical community may not substantially endorse FreeStyle as a preferred blood glucose self-monitoring device. In addition, FreeStyle may not achieve significant market acceptance on a timely basis, if at all, due to:



the significant influence of established glucose
monitoring products with healthcare professionals, customers and third-party payors;

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

the ability of some
of our competitors to price products below a price at which we can competitively manufacture and sell our products;



the introduction or acceptance of competing products or technologies; and



cost constraints.

Furthermore, FreeStyle may not encourage
significantly more active testing, and participants in the glucose self-monitoring market may gravitate toward more established brands. If we are unable to successfully market and sell our FreeStyle products, we may not be able to generate
significant revenues or achieve profitability because we do not have alternative products.

In addition, to encourage market acceptance of our products, we currently distribute
the FreeStyle System kit at a financial loss through samples, discounts and rebates. In order to generate sufficient revenues in the future, we will therefore have to rely on recurring revenue from the repeated purchase of our FreeStyle test strips.
If Freestyle does not gain sufficient market share to generate significant recurring revenue from the sale of our test strips, we may not achieve profitability.

We have
limited sales and marketing experience and any failure to expand sales of Freestyle will negatively impact future revenues.

We have limited experience in marketing and
selling our products relative to other companies in the blood glucose self-monitoring market. We received regulatory clearance for our initial product in January 2000 and commenced commercial shipments in June 2000. Our products require a complex
marketing and sales effort targeted at health care professionals, diabetes educators, people with diabetes, pharmacists and national retailers. We have significantly expanded our sales and marketing teams in 2001, 2002 and 2003. We face significant
challenges and risks in training, managing and retaining these teams, including managing geographically dispersed efforts. In addition, we currently have only one distributor in most of Europe and one distributor in Japan. We are dependent upon the
sales and marketing efforts of our third-party distributors in these large international markets. These distributors may not commit the necessary resources to effectively market and sell our products. Further, they may not be successful in selling
our products. Recently, the Disetronic Group, the parent company of our European distributor, announced that its insulin pump business will be acquired by Roche Diagnostics, one of our competitors. While Disetronic Injections Systems AG, our
European distributor, will continue to distribute our products and we have access to Disetronics insulin pump user base, we may not have the level of access that we enjoyed before the acquisition, and this could translate into decreased sales
of our products. In addition, the recent amendment to the international distributor agreement with Disetronic lowered Disetronic Injections Systems AGs annual minimum purchase obligations. Our financial condition would be harmed if our
marketing and sales efforts are unsuccessful.

We face competition from competitors with greater resources, which may make it more difficult for us to achieve significant
market penetration.

The market for blood glucose monitoring devices is intensely competitive, subject to rapid change and significantly affected by new product introductions
and other market activities of industry participants. We compete directly with Roche Diagnostics Corporation, LifeScan, Inc., a division of Johnson & Johnson, MediSense, a division of Abbott Laboratories, and Bayer AG, which currently account
for approximately 90% of the worldwide sales of blood glucose self-monitoring systems. In addition, Becton, Dickinson and Company recently launched a new blood glucose monitoring system. Each of these companies is either publicly traded or a
division of a publicly-traded company, and they enjoy several competitive advantages, including:



significantly greater name recognition;



established relations with health care professionals, customers and third-party payors;



additional lines of products, and the ability to offer rebates or to offer higher discounts and incentives to gain a
competitive advantage; and



greater
resources for product development, sales and marketing, and patent litigation.

These companies and others have developed and will continue to develop and acquire new products
that compete directly with our products. In addition, our competitors spend significantly greater funds for the research, development, promotion and sale of new and existing products. These resources can allow them to respond more

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quickly to new or emerging technologies and changes in customer requirements. These resources also allow them to aggressively promote and discount their
products, particularly system kits. For all the foregoing reasons, we may not be able to compete successfully against our current and future competitors.

Because the medical
device industry is litigious, we may be sued for allegedly violating the intellectual property rights of others.

The medical technology industry has in the past been
characterized by a substantial amount of litigation and related administrative proceedings regarding patents and intellectual property rights. In addition, major medical device companies have used litigation against emerging growth companies as a
means of gaining a competitive advantage.

Should third parties file patent applications or be issued patents claiming technology also claimed by us in pending applications, we
may be required to participate in interference proceedings in the U.S. Patent and Trademark Office to determine the relative priorities of our inventions and the third parties inventions. We could also be required to participate in
interference proceedings involving our issued patents and pending applications of another entity. An adverse outcome in an interference proceeding could require us to cease using the technology or to license rights from prevailing third
parties.

Third parties may claim we are using their patented inventions and may go to court to stop us from engaging in our normal operations and activities. These lawsuits are
expensive to defend and conduct and would also consume and divert the time and attention of our management. A court may decide that we are infringing a third partys patents and may order us to cease the infringing activity. The court could
also order us to pay damages for the infringement. These damages could be substantial and could harm our business, financial condition and operating results.

In September 2001,
we received a letter from the exclusive licensee of an issued patent alleging that FreeStyle infringes the patent and requesting that we contact the licensee regarding sublicense opportunities. We have evaluated the patent and we are discussing a
possible sublicense or cross-license with the licensee. In August 2002, we received a letter from the owner of an issued United States patent that states our FreeStyle Tracker System may infringe the patent. We are discussing a possible license or
cross-license with that patent owner.

If we were unable to obtain, on reasonable commercial terms, any necessary license following a determination of infringement or an adverse
determination in litigation or in interference or other administrative proceedings, we would have to redesign our products to avoid infringing a third partys patent and could temporarily or permanently have to discontinue manufacturing and
selling some of our products. If this were to occur, it would negatively impact future sales.

If we fail to protect our intellectual property rights, our competitors may take
advantage of our ideas and compete directly against us.

We rely on patent protection, as well as a combination of copyright, trade secret and trademark laws, and
nondisclosure, confidentiality agreements and other contractual restrictions to protect our proprietary technology. However, these legal means afford only limited protection and may not adequately protect our rights or permit us to gain or keep any
competitive advantage. For example, our patents may be challenged, invalidated or circumvented by third parties. Our patent applications may not be issued as patents in a form that will be advantageous to us. We may not be able to prevent the
unauthorized disclosure or use of our technical knowledge or other trade secrets by employees. Furthermore, the laws of foreign countries may not protect our intellectual property rights to the same extent as the laws of the United States. Even if
our intellectual property rights are adequately protected, litigation may be necessary to enforce our intellectual property rights, which could result in substantial costs to us and result in a substantial diversion of management attention. If our
intellectual property is not adequately protected, our competitors could use our intellectual property to enhance their products. This would harm our competitive position, decrease our market share and otherwise harm our business.

The prosecution and enforcement of patents licensed to us by third parties are not within our control, and without these technologies, our products may not be successful and our business
would be harmed.

We rely on licenses to use various technologies that are material to our business. We do not own the patents that underlie these licenses. The licenses from
Asulab, SA and Inverness Medical Innovations, Inc. grant us the right under specific patents to make and sell diagnostic devices for diabetes monitoring that contain the inventions claimed in the licensed patents. Our rights to use these
technologies and employ the inventions claimed in the licensed patents are subject to our licensors abiding by the terms of those licenses. In addition, we often do not control the

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prosecution of the patents to which we hold licenses or the strategy for determining when any patents to which we hold licenses should be enforced. As a
result, we are largely dependent upon our licensors to determine the appropriate strategy for prosecuting and enforcing those patents.

If we are unable to continue to develop
innovative products in the glucose monitoring market, our business would be harmed.

The glucose monitoring market is subject to rapid technological change and product
innovations. Our products are based on our proprietary technology, but our competitors may succeed in developing or marketing products that will be technologically superior to ours or be more competitive with regard to product features. In addition,
over $91 billion is spent annually on the treatment of diabetes and its complications and the National Institutes for Health and other supporters of diabetes research are continually seeking ways to prevent or cure diabetes. Therefore, our products
may also be rendered obsolete by technological breakthroughs in diabetes prevention, monitoring or treatment.

We are currently developing additional enhancements for FreeStyle,
and we are developing new products such as our Continuous Glucose Monitoring System. Marketing of these products will require FDA and other regulatory clearances and approvals. We have experienced some delays in the clinical trials being conducted
to support the approval of our Continuous Glucose Monitoring System due to problems with the electronics portion of the system. Development of the Continuous Glucose Monitoring System and other products will require additional research and
development expenditures. We may not be successful in developing, marketing or manufacturing these new products. In addition, several of our competitors are in various stages of development of products similar to our Continuous Glucose Monitoring
System, and the FDA has approved two of these products. If any of our competitors succeeds in developing a commercially viable product for continuous glucose monitoring and obtains government approval or successfully commercializes its FDA-approved
product, this could negatively affect our future revenues. Similarly, several of our competitors and some new market entrants are developing products that have small sample size requirements and the ability to test on the fingertip and other body
sites. A new competitor, for instance, recently launched a blood glucose monitoring system that claims the same sample size requirement as the FreeStyle blood glucose monitoring system. The successful development and introduction of such products by
competitors or new entrants would reduce the product benefits of our FreeStyle products versus the competition and could adversely impact future revenues.

If we fail to
obtain or maintain necessary FDA clearances or approvals for products, or if approvals are delayed, we will be unable to commercially distribute and market our products in the United States.

Our products are medical devices that are subject to extensive regulation in the United States and in foreign countries where we do business. Unless an exemption applies, each medical device that we wish to market in
the United States must first receive either 510(k) clearance or premarket approval from the FDA. Either process can be lengthy and expensive. The FDAs 510(k) clearance process usually takes from four to twelve months from the date the
application is complete, but may take longer. Although we have obtained 510(k) clearance for our initial product, FreeStyle, our 510(k) clearance can be revoked if safety or effectiveness problems develop. The premarket approval process is much more
costly, lengthy and uncertain. It generally takes from one to three years from the date the application is complete or even longer. However, achieving a completed application is a process that may take numerous clinical trials and require the filing
of amendments over time. Therefore, even if a product is successfully developed, it may not be commercially available for a number of years. Our Continuous Glucose Monitoring System under development will require premarket approval. We have
experienced some delays in the clinical trials being conducted to support the approval of our Continuous Glucose Monitoring System due to problems with the electronics portion of the system. We may not be able to obtain additional clearances or
approvals for the Continuous Glucose Monitoring System or other products in a timely fashion, or at all. Delays in obtaining clearance or approval could adversely affect our revenues and profitability.

Modification to our marketed devices may require new 510(k) clearances or premarket approvals or require us to cease marketing or recall the modified devices until these clearances are obtained.

Any modification to an FDA cleared device that could significantly affect its safety or effectiveness, or that would constitute a major change in its intended use, requires a new FDA 510(k)
clearance or possibly premarket approval. The FDA requires every manufacturer to make this determination in the first instance, but the FDA can review any such decision. We have modified aspects of FreeStyle since receiving regulatory approval, but
we believe that new 510(k) clearances are not required. In the case of certain labeling changes for FreeStyle, the FDA required a new 510(k) clearance which was obtained in December 2001. We may make additional modifications to FreeStyle and

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future products after they have received clearance or approval, and in appropriate circumstances, determine that new clearance or approval is unnecessary.
The FDA may not agree with any of our decisions not to seek new clearance or approval. If the FDA requires us to seek 510(k) clearance or premarket approval for any modifications to a previously cleared product, we may be required to cease marketing
or recall the modified device until we obtain this clearance or approval. Also, in these circumstances, we may be subject to significant regulatory fines or penalties.

If our
suppliers or we fail to comply with the FDAs Quality System Regulation, our manufacturing operations could be delayed, and our product sales and profitability could suffer.

Our manufacturing processes for our FreeStyle test strips, as well as the manufacturing processes utilized by our suppliers of FreeStyle meters, lancing devices, lancets and control solution, are required to comply with the FDAs Quality
System Regulation, which covers the methods and documentation of the design, testing, production, control, quality assurance, labeling, packaging, storage and shipping of our products. The FDA enforces the Quality System Regulation through
unannounced inspections. The manufacturing lines for our FreeStyle meters at Flextronics International Ltd. in San Jose, California and China have not been inspected to date.If we or one of our
suppliers fail a Quality System Regulation inspection, our operations could be disrupted and our manufacturing delayed. If we fail to take adequate corrective action in response to any FDA observations, we could face various enforcement actions,
which could include a shut-down of our manufacturing operations and a recall of our products, which would harm our reputation and cause our product sales and profitability to suffer. Furthermore, our key component suppliers may not currently be or
may not continue to be in compliance with applicable regulatory requirements.

Our products are subject to product recalls or field corrective actions even after receiving FDA
clearance or approval, which would harm our reputation.

The FDA and similar governmental authorities in other countries have the authority to require the recall of or field
corrective actions for our products in the event of material deficiencies or defects in design or manufacture. A government mandated or firm-initiated recall or field corrective action by us could occur as a result of component failures,
manufacturing errors or design defects. We commenced a firm-initiated field corrective action due to software bugs associated with the diabetes management features of our FreeStyle Tracker diabetes management system shortly after its launch. Any
recall of or material field corrective action for product may divert managerial and financial resources and harm our reputation with customers.

We currently depend on single
suppliers and manufacturers for our FreeStyle products, and the loss of any of these suppliers or manufacturers could harm our business.

Our FreeStyle meters, along with our
FreeStyle lancing devices and lancets, are each currently manufactured according to our specifications by single third-party manufacturers. The meters, lancing devices and lancets are manufactured from components purchased from outside suppliers,
and some of these components are currently single-sourced. We have previously experienced delays in the delivery of some sole sourced electronic components for our meters. Our FreeStyle test strips, which we manufacture ourselves, are comprised of
several components obtained from single-source suppliers. In the event we are unable, for whatever reason, to obtain components from suppliers as scheduled, or if our contract manufacturers are unable to meet our manufacturing requirements, we may
not be able to obtain components from alternate suppliers or engage an additional manufacturer in a timely manner. Any disruption or delay in shipments of FreeStyle meters, test strips, lancing devices or lancets could result in the loss of
customers or the failure to acquire new customers, if they choose a competitors product because our product is not available. Such a disruption or delay would negatively affect our revenues. In addition, the purchase of components from
alternate suppliers or engaging an additional manufacturer in a timely manner could impose increased costs that could negatively impact our gross margins.

If we are unable to
meet customer demand, we may not improve our sales growth sufficiently to achieve profitability.

To be successful, we must manufacture our FreeStyle test strips in
substantial quantities at acceptable costs. If we do not succeed in manufacturing sufficient quantities of our test strips to meet customer demand, we could lose customers and fail to acquire new customers, if they choose a competitors product
because our product is not available. Increasing demand since the launch of FreeStyle has necessitated an increase in our test strip manufacturing capacity. In response, we have expanded our manufacturing capacity at our facilities in Alameda,
California. We anticipate the need to continue expanding manufacturing capacity and have ordered certain specialized equipment. Delays in receiving certain specialized equipment extended the date when we were able to begin operations on our second
test strip line. If we are unable to expand manufacturing capacity in a timely manner

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we could be unable to meet customer demand for FreeStyle test strips, which would adversely affect our financial results and restrict our sales growth.

Significant product returns could harm our operating results.

Our return policy allows end users in
the United States and Canada to return FreeStyle System kits to us for any reason for a full refund within 30 days of purchase. In addition, our FreeStyle System kits and FreeStyle test strips currently have an 18 month shelf life. Retailers and
wholesalers in the United States and Canada can return these products to us within six months after this expiration date. We have established reserves for the liability associated with product returns. However, unforeseen returns from retailers,
wholesalers or end users could adversely affect our operating results.

We may have warranty claims that exceed our reserves.

FreeStyle meters carry a five-year warranty against defects in materials and workmanship. We have established reserves for the liability associated with product warranties. However, any unforeseen warranty exposure
could adversely affect our operating results.

We outsource several key parts of our operations and any interruption in the services provided could prevent us from expanding
our business.

We currently outsource several aspects of our business, including the manufacture of FreeStyle meters, lancing devices and lancets, the functioning of our
procurement systems, the operation of our customer service function, and certain distribution and logistics functions. Since outsourcing leaves us without direct control over these business functions, interruptions in the services of our third-party
providers may be difficult or impossible to remedy in a timely fashion. In addition, we may be unable to obtain the necessary resources from our third-party providers to meet realized growth in our business.

Any adverse changes in reimbursement procedures by Medicare or other third-party payors may limit our ability to market and sell our products.

In the United States, glucose self-monitoring devices and test strips are generally covered by Medicare and other third-party payors, which provide for reimbursement of all or part of the cost of the product. Medicare and other third-party
payors are increasingly scrutinizing whether to cover new products and the level of reimbursement for covered products. FreeStyle is currently being reimbursed through Medicare, Medicaid, open formulary plans and certain preferred provider
organizations.

International market acceptance of our products will depend, in part, upon the availability of reimbursement within prevailing health care payment systems.
Reimbursement and health care payment systems in international markets vary significantly by country, and include both government sponsored health care and private insurance. We may not obtain international reimbursement approvals in a timely
manner, if at all. Our failure to receive international reimbursement approvals may negatively impact market acceptance of our products in the international markets in which those approvals are sought.

We believe that in the future, reimbursement may be subject to increased restrictions both in the United States and in international markets. Third-party reimbursement and coverage may not be available or adequate in
either the United States or international markets. Future legislation, regulation or reimbursement policies of third-party payors may adversely affect the demand for our existing products or our products currently under development or our ability to
sell our products on a profitable basis. The lack of third-party payor coverage or the inadequacy of reimbursement could have a material adverse effect on our business, financial condition and results of operations.

We may have difficulty managing our growth.

We have experienced significant growth in the scope of our operations and the
number of our employees. We expect this growth to continue though at substantially reduced rates. This growth may continue to place a significant strain on our management and operations. Our ability to manage this growth will depend upon our ability
to attract, hire and retain skilled employees. Our success will also depend on the ability of our officers and key employees to continue to implement and improve our operational and other systems, to manage multiple, concurrent development projects
and to hire, train and manage our employees. Our future success is heavily dependent upon growth and

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acceptance of new products. If we cannot scale our business appropriately or otherwise adapt to anticipated growth and new product introduction, our
business, financial condition and results of operations will be adversely affected.

Our success will depend on our ability to attract and retain key personnel and scientific
staff.

We believe our future success will depend upon our ability to successfully manage our growth, including attracting and retaining scientists, engineers and other highly
skilled personnel. Our employees may terminate their employment with us at any time and are not subject to employment contracts. Hiring qualified management and technical personnel will be difficult due to the limited number of qualified
professionals. Competition for these types of employees is intense in the field of diabetes monitoring and management. We have in the past experienced difficulty in recruiting qualified personnel. If we fail to attract and retain personnel,
particularly management and technical personnel, we may not be able to execute on our business plan.

If we do not provide quality customer service, we would lose customers and
our operating results would suffer.

Our ability to provide superior customer service to our customers, health care professionals and educators is critical. To effectively
compete, we must build strong brand awareness among our customers, much of which is based upon personal referrals. In order to gain these referrals, we must provide customer service representatives who are able and available to provide our customers
with answers to questions regarding our products. This will require us to continue to build and maintain customer service operations, for which we currently rely on a single third-party provider. We will require increased staff at our third-party
provider to further support growth in new customers. Any failures or disruption to our customer services operations, or the termination of our contract with our only third-party provider, could cause us to lose customers.

Our meters are manufactured in China, and we are subject to risks of international manufacturing operations and risks associated with SARS.

Our FreeStyle meters are manufactured according to our specifications by a single third-party manufacturer at its facility in China. The geographical distance between our principal facility in Alameda, California and
the manufacturing facility in China creates a number of logistical and communications challenges. These challenges include managing operations across multiple time zones, directing the manufacture and delivery of products across distances,
coordinating procurement and delivery of components and raw materials and coordinating the activities and decisions of the core manufacturing team, which is based in China and California.

Governmental authorities in China exercise significant influence over many aspects of the economy, and their actions could have a significant effect on the manufacture of our Freestyle meters. Risks of changes in
economic and political conditions in China, include:



labor unrest and difficulties in staffing;



increases in duties and taxation levied on our Freestyle meters;



limitations on imports of Freestyle meter components or exports of assembled Freestyle meters, or other travel
restrictions;



expropriation of private
enterprises;



a potential reversal of
current favorable policies encouraging foreign trade; and



fluctuations in the value of local currency.

In addition, the recent outbreak of severe acute
respiratory syndrome (SARS) may adversely impact our business and particularly Flextronics Freestyle meter manufacturing operations. The SARS outbreak has been most notable in Asia, in particular China. Flextronics manufacture of our
Freestyle meters in China could suffer if its employees contract SARS or otherwise are unable to fulfill their responsibilities. In addition, our business could also be harmed if travel to or from China and the United States is restricted or
inadvisable.

Any delay or disruption in the manufacture of our Freestyle meters, including delays or disruptions relating to these logistical and communication challenges,
changes in the economic or political conditions in China or the recent outbreak of SARS, could delay or disrupt shipments of Freestyle meters to our customers. Shipment delays or disruptions could result in the loss of customers or the failure to
acquire new customers, if they choose a competitors product because our product is not available. Such a disruption or delay would negatively affect our revenues. In addition, engaging an additional manufacturer or commencing Freestyle meter
manufacturing obligations on an alternative line in a timely manner could impose increased costs that would negatively impact our gross margins.

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We are subject to additional risks associated with international operations.

We
believe that a significant amount of our future revenues may come from international sales, and these sales are subject to a number of risks. For example, foreign regulatory agencies often establish requirements different from those in the United
States. Fluctuations in exchange rates of the U.S. dollar against foreign currencies may affect demand for our products overseas. In addition, our international sales may be adversely affected by export license requirements, the imposition of
governmental controls, political and economic instability, trade restrictions, changes in tariffs and difficulties in staffing and managing international operations.

Complying
with international regulatory requirements is an expensive, time-consuming process and approval is never certain.

International sales of our products are subject to strict
regulatory requirements. The review process varies from country to country, is typically lengthy and expensive, and approval is never certain. We have the required regulatory approvals to market FreeStyle in various countries outside the United
States. Failure to maintain current foreign approvals or to receive and maintain approvals in other countries would prevent us from expanding international sales of FreeStyle, which would negatively impact our future revenues.

If we choose to acquire new and complementary businesses, products or technologies instead of developing them ourselves, we may be unable to complete these acquisitions or to successfully integrate
an acquired business or technology in a cost-effective and non-disruptive manner.

Our success depends on our ability to continually enhance and broaden our product offerings
in response to changing technologies, customer demands and competitive pressures. Accordingly, we may, in the future, acquire complementary businesses, products, or technologies instead of developing them ourselves. We do not know if we will be able
to complete any acquisitions, or whether we will be able to successfully integrate any acquired business, operate it profitably or retain its key employees. Integrating any business, product or technology we acquire could be expensive and time
consuming, disrupt our ongoing business and distract our management. If we are unable to integrate any acquired entities, products or technologies effectively, our business will suffer. In addition, any amortization of goodwill or other assets or
charges resulting from the costs of acquisitions could harm our business and operating results.

If we become subject to product liability claims, we may be required to pay
damages that exceed our insurance coverage.

Our business exposes us to potential product liability claims that are inherent in the testing, production, marketing and sale of
human diagnostic products. While we believe that we are reasonably insured against these risks, we may not be able to obtain insurance in amounts or scope sufficient to provide us with adequate coverage against all potential liabilities. Currently,
we maintain product liability insurance in the amount of $22.0 million. A product liability claim in excess of our insurance coverage would have to be paid out of cash reserves and would harm our reputation in the industry.

If we require future capital, we may not be able to secure additional funding in order to expand our operations and develop new products.

We may seek additional funds from public and private stock offerings, borrowings under lease lines of credit or other sources. This additional financing may not be available on a timely basis on terms acceptable to us,
or at all. This financing may be dilutive to stockholders or may require us to grant a lender a security interest in our assets. The amount of money we will need will depend on many factors, including:



revenues generated by sales of FreeStyle and our
future products;



expenses we incur in
developing and selling our products;



the
commercial success of our research and development efforts; and



the emergence of competing technological developments.

If adequate funds are not available, we may
have to delay development or commercialization of our products or license to third parties the rights to commercialize products or technologies that we would otherwise seek to

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commercialize. We also may have to reduce marketing, customer support or other resources devoted to our products. Any of these results would harm our
financial condition.

Most of our operations are currently conducted at a single location, and a disaster at this facility is possible and could result in a prolonged
interruption of our business.

We currently conduct all our scientific and test strip manufacturing and most of our management activities at a single location in Alameda,
California near known earthquake fault zones. In addition, our facilities were built on fill material dredged from the San Francisco Bay in the 1960s. We have taken precautions to safeguard our facilities, including insurance, health and safety
protocols, and off-site storage of computer data. However, a natural disaster, such as an earthquake, fire or flood, could cause substantial delays in our operations, damage or destroy our manufacturing equipment or inventory, and cause us to incur
additional expenses. A disaster could seriously harm our business and adversely affect our reputation with customers. The insurance we maintain against fires, floods, and earthquakes may not be adequate to cover our losses in any particular
case.

We may be liable for contamination or other harm caused by materials that we use, and changes in environmental regulations could cause us to incur additional
expense.

Our research and development and clinical processes involve the use of potentially harmful biological materials as well as hazardous materials. We are subject to
federal, state and local laws and regulations governing the use, handling, storage and disposal of hazardous and biological materials and we incur expenses relating to compliance with these laws and regulations. If violations of environmental,
health, and safety laws occur, we could be held liable for damages, penalties and costs of remedial actions. These expenses or this liability could have a significant negative impact on our financial condition. We may violate environmental, health
and safety laws in the future as a result of human error, equipment failure, or other causes. Environmental laws could become more stringent over time, imposing greater compliance costs and increasing risks and penalties associated with violations.
We are subject to potentially conflicting and changing regulatory agendas of political, business, and environmental groups. Changes to or restrictions on permitting requirements or processes, hazardous or biological material storage or handling
might require an unplanned capital investment and/or relocation. Compliance with new laws or regulations could harm our business, financial condition and results of operations.

Our common stock has been and will likely continue to be subject to substantial price and volume fluctuations, and the value of our stock could decline.

The market
prices and trading volumes for emerging growth medical device companies and our company in particular have been highly volatile and are likely to continue to be highly volatile in the future. The following factors, in addition to other risk factors
described in this section, may have a significant impact on the market price of our stock:



volume and timing of orders for our products;



monthly variations in market data relative to our competitors;



our ability to develop, obtain regulatory clearance
for, and market, new and enhanced products on a timely basis;



the announcement of new products or product enhancements by us or our competitors;



announcements of technological or medical innovations in the monitoring or treatment of diabetes;



product liability claims or other
litigation;



quarterly variations in our
or our competitors results of operations;



changes in governmental regulations or in the status of our regulatory approvals or applications;



changes in the availability of third-party reimbursement in the United States or other countries;



changes in earnings estimates or recommendations by
securities analysts; and

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

general market
conditions and other factors, including factors unrelated to our operating performance or the operating performance of our competitors.

The sales of a substantial number of
shares of our common stock may adversely affect the market price for our common stock

Sales of a significant number of shares of our common stock in the public market or the
market perception that these sales may occur, could negatively affect the market price for our common stock. As of May 1, 2003, we had 41,079,187 shares of common stock outstanding. All of these shares are available for sale. Also, many of our
employees, consultants and directors may exercise their stock options in order to sell the stock underlying their options in the market under a registration statement we have filed with the SEC.

Our executive officers and directors and entities affiliated with them own a significant percentage of our stock, and as a result, the trading price for our shares may be depressed and these stockholders can take
actions that may be adverse to investors interests.

Our executive officers and directors and entities affiliated with them beneficially own, in the aggregate,
approximately 23% of our common stock as of May 1, 2003. This significant concentration of share ownership may adversely affect the trading price for our common stock because investors often perceive disadvantages in owning stock in companies with
concentrated ownership. These stockholders, acting together, will have the ability to exert substantial influence over all matters requiring approval by our stockholders, including the election and removal of directors and any proposed merger,
consolidation or sale of all or substantially all of our assets. In addition, they could dictate the management of our business and affairs. This concentration of ownership could have the effect of delaying, deferring or preventing a change in
control, or impeding a merger or consolidation, takeover or other business combination that could be favorable to our investors.

Our Stockholder Rights Plan, charter documents
and Delaware law may inhibit a takeover that stockholders consider favorable and could also limit the market price of investors stock.

In February 2003, our Board of
Directors adopted a Stockholder Rights Plan. The Stockholder Rights Plan provides for a dividend distribution of one Preferred Shares Purchase Right on each outstanding share of our common stock. Each Right entitles stockholders to buy 1/1000th of a share of the companys Series A participating preferred stock at an exercise price of $100.00. The Rights will become exercisable after a person or group announces the
acquisition of 15% or more of our common stock, or announces commencement of a tender offer, the consummation of which would result in ownership by the person or group of 15% or more of our common stock. We will be entitled to redeem the Rights at
$0.001 per Right at any time on or before the tenth day following acquisition by a person or group of 15% or more of our common stock. The Stockholder Rights Plan could have the effect of delaying, deferring or preventing a change in control of
TheraSense, including without limitation, discouraging a proxy contest or making more difficult the acquisition of a substantial block of our common stock

Our certificate of
incorporation and bylaws contain provisions that could also delay or prevent a change in control of our company. Among these provisions are the following:



authorize the issuance of preferred stock which can be created and issued by the board of directors without prior stockholder approval,
commonly referred to as blank check preferred stock, with rights senior to those of common stock;



prohibit stockholder actions by written consent; and



provide for a classified board of directors.

In addition, we are
governed by the provisions of Section 203 of Delaware General Corporate Law. These provisions may prohibit stockholders owning 15% or more of our outstanding voting stock from merging or combining with us. Section 203 of Delaware General Corporate
Law, our Stockholder Rights Plan and other provisions in our amended and restated certificate of incorporation and bylaws and under Delaware law could reduce the price that investors might be willing to pay for shares of our common stock in the
future and result in the market price being lower than it would be without these provisions.

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The liquidity of our common stock is uncertain since it has been publicly traded for a short period of time and may have a limited market.

Prior to our initial public offering in October 2001, there was no public market for our common stock. We cannot predict the extent to which investor interest in our company will lead to
the development of an active, liquid trading market. Active trading markets generally result in lower price volatility and more efficient execution of buy and sell orders for investors.

ITEM 3.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Because we translate foreign currencies into United States dollars for reporting purposes,
exchange rates can have an impact on our financial results, although this impact is generally immaterial. We believe that our exposure to currency exchange risk is low because our Canadian and United Kingdom subsidiaries satisfy their financial
obligations almost exclusively in their local currencies. As of March 31, 2003, we did not engage in foreign currency hedging activities.

The primary objective of our investment
activities is to preserve principal while at the same time maximizing the income we receive from our invested cash without significantly increasing risk of loss. As of March 31, 2003, our cash, cash equivalents and available-for-sale securities
consisted primarily of money market funds maintained at three major U.S. financial institutions. The recorded carrying amounts of cash and cash equivalents approximate fair value due to their short-term maturities. We do not believe that an increase
in market rates would have any significant negative impact on the realized value of our investments, but an increase in market rates could negatively impact the interest expense associated with a portion of our long-term debt. Substantially all of
our long-term debt obligations have a fixed rate of interest.

ITEM 4.

CONTROLS AND PROCEDURES

(a)

Evaluation of
disclosure controls and procedures. Our chief executive officer and our chief financial officer, after evaluating the effectiveness of our disclosure controls and procedures (as defined in the Securities Exchange
Act of 1934 Rules 13a-14(c) and 15-d-14(c)) as of a date (the Evaluation Date) within 90 days before the filing date of this report, have concluded that as of the Evaluation Date, our disclosure controls and procedures were adequate and
designed to ensure that material information relating to us and our consolidated subsidiaries would be made known to them by others within those entities.

(b)

Changes in internal controls. There were no significant changes in our internal controls or to our knowledge, in other
factors that could significantly affect our internal controls subsequent to the Evaluation Date.

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PART II: OTHER INFORMATION

ITEM 1

LEGAL PROCEEDINGS

We are not currently a party to any material pending legal proceedings.

ITEM 2.

CHANGES IN SECURITIES AND USE OF PROCEEDS

In October 2001, we closed our initial public offering of 6,900,000 shares of our common stock at a per
share price of $19.00 pursuant to a Registration Statement on Form S-1 (Registration No. 333-64456), which was declared effective on October 11, 2001.

To date, we have spent a
portion of the net proceeds as follows (i) approximately $7.8 million for the purchase of capital equipment, (ii) approximately $3.6 million to expand our facility in Alameda, California, (iii) approximately $21.6 million to sponsor free product
samples and accelerate the hiring of additional sales representatives, (iv) approximately $4.7 million for research and development of enhanced FreeStyle products and our Continuous Glucose Monitoring System and (v) approximately $34.3 million for
general working capital purposes. We are currently investing the remaining net proceeds from the offering for future use as additional working capital. Such remaining net proceeds have been invested in highly liquid instruments, such as commercial
paper and U.S. Government obligations, with an average maturity of twelve months or less.

From January 1, 2003 through March 31, 2003, we did not issue any unregistered
securities.

ITEM 3.

DEFAULTS UPON SENIOR SECURITIES

None

ITEM
4.

SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None

ITEM 5.

OTHER INFORMATION

None

ITEM 6.

EXHIBITS AND REPORTS ON FORM 8-K

(a)

Exhibits



|ExhibitNumber | Description of Document                                                                                                                                                  
|------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|              |                                                                                                                                                                          
|*3.1          | Certificate of Incorporation of TheraSense, Inc., a Delaware corporation, as currently in effect                                                                         
|              |                                                                                                                                                                          
|*3.2          | Bylaws of TheraSense, Inc. as currently in effect                                                                                                                        
|              |                                                                                                                                                                          
|*4.1          | Specimen Common Stock Certificate                                                                                                                                        
|              |                                                                                                                                                                          
|**10.1        | 1997 Stock Plan, as amended, and forms of agreements thereunder                                                                                                          
|              |                                                                                                                                                                          
|*10.2         | 2001 Stock Plan and forms of agreements thereunder                                                                                                                       
|              |                                                                                                                                                                          
|*10.3         | 2001 Employee Stock Purchase Plan and forms of agreement thereunder                                                                                                      
|              |                                                                                                                                                                          
|*10.4         | Form of Director and Executive Officer Indemnification Agreement                                                                                                         
|              |                                                                                                                                                                          
|*10.5         | Employment Letter from TheraSense, Inc. to W. Mark Lortz, dated as of October 6, 1997                                                                                    
|              |                                                                                                                                                                          
|*10.6        | Technology Purchase Agreement between TheraSense and E. Heller & Co. dated as of October 10, 2000                                                                        
|              |                                                                                                                                                                          
|*10.7        | Cooperative Development Agreement between TheraSense, Inc. and Facet Technologies LLC (f/k/a Gainor Medical North America LLC), dated as of December 1, 1998             
|              |                                                                                                                                                                          
|*10.7(a)     | First Amendment to Cooperative Development Agreement between TheraSense, Inc. and Facet Technologies LLC (f/k/a Gainor Medical North America LLC), effective June 1,
2001
|              |                                                                                                                                                                          
|*10.7(b)     | Master Purchase Agreement between TheraSense, Inc. and Facet Technologies LLC effective June 1, 2001                                                                     
|              |                                                                                                                                                                          
|*10.8         | Standard Industrial/Commercial Single-Tenant Lease between TheraSense, Inc. and PlyProperties, a Partnership, dated as of February 26, 1999, and addendum
thereto        

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|ExhibitNumber | Description of Document                                                                                                                                                                                                                                                                                                                                    
|------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|              |                                                                                                                                                                                                                                                                                                                                                            
|***10.8(a)    | Second Amendment to Standard Industrial/Commercial Single-Tenant Lease between TheraSense, Inc. and PlyProperties, a Partnership dated May 7, 2002                                                                                                                                                                                                         
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.9        | Master Purchase Agreement between TheraSense and Flextronics International USA, Inc., dated as of November 3, 1999                                                                                                                                                                                                                                         
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.10       | Assignment of Patent Rights and Technology by and among Board of Regents of the University of Texas System, an agency of the State of Texas, Dr. Adam Heller,
E. Heller & Company and TheraSense Inc. dated August 1, 1991                                                                                                                                 
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.11       | First Amendment, dated March 19, 1998, to the Agreement entitled Assignment of Patent Rights and Technology by and among Board of Regents of the University of Texas
System, an agency of the State of Texas, Dr. Adam Heller, E. Heller & Company and TheraSense Inc. dated August 1, 1991                                                                
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.12       | License Agreement between TheraSense, Inc. and Asulab SA., dated February 23, 2000                                                                                                                                                                                                                                                                         
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.13       | Warehouse Distribution Contract between TheraSense, Inc. and Livingston Healthcare Service, Inc., dated March 15, 2000                                                                                                                                                                                                                                     
|              |                                                                                                                                                                                                                                                                                                                                                            
|****10.13(a) | October 23, 2002 amendment to Warehouse Distribution Contract between TheraSense, Inc. and UPS Supply Chain Management f/d/b/a Livingston Healthcare Service, Inc., dated
March 15, 2000                                                                                                                                                                   
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.14       | International Distributor Agreement between TheraSense, Inc. and Nipro Corporation, dated April 1, 2001                                                                                                                                                                                                                                                    
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.15       | International Distributor Agreement between TheraSense, Inc. and Disetronic Handels AG, dated September 13, 2000                                                                                                                                                                                                                                           
|              |                                                                                                                                                                                                                                                                                                                                                            
|**10.15(a)   | Amendment No. 1 to International Distributor Agreement between TheraSense, Inc. and Disetronic Handels AG, dated February 8, 2002                                                                                                                                                                                                                          
|              |                                                                                                                                                                                                                                                                                                                                                            
|*#10.15(b)  | Amendment No. 2 to International Distributor Agreement between TheraSense, Inc. and Disetronic Handels AG, dated January 1, 2003                                                                                                                                                                                                                           
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.16       | Management Services Agreement between TheraSense, Inc. and ICT Group, Inc., dated January 31, 2000                                                                                                                                                                                                                                                         
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.17       | License Agreement between TheraSense, Inc. and Unilever PLC dated February 10, 2000                                                                                                                                                                                                                                                                        
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.18        | Amended and Restated Investors Rights Agreement by and among holders of TheraSense Preferred Stock and TheraSense, Inc., dated January 23, 2001, as amended                                                                                                                                                                                                
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.19        | First Amendment to the Agreement Entitled Sponsored Research Agreement No. UTA 98-0296 entered into as of October 10, 2000, by and between TheraSense, Inc. and the Board of
Regents of the University of Texas System on behalf of the University of Texas at Austin                                                                                      
|              |                                                                                                                                                                                                                                                                                                                                                            
|*10.20        | Form of Change of Control Agreement between TheraSense, Inc. and each Vice President of TheraSense, Inc.                                                                                                                                                                                                                                                   
|              |                                                                                                                                                                                                                                                                                                                                                            
|*****10.21    | Rights Agreement dated as of March 7, 2003 between TheraSense, Inc. and Computershare Investor Services, as Rights Agent, which includes the Form of Certificate of
Designation of Series A Participating Cumulative Preferred Stock as Exhibit A, the Summary of Terms of the Rights Agreement as Exhibit B and the Form of Right Certificate s Exhibit C.
|              |                                                                                                                                                                                                                                                                                                                                                            
|99.1          | Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350                                                                                                                                                                                                                                                    

*

Incorporated by reference to the same exhibit filed with our Registration Statement on
Form S-1 (Registration No. 333-64456), which was declared effective on October 11, 2001.

**

Incorporated by reference to the same exhibit filed with our Form 10-K for the year ended December 31, 2001.

***

Incorporated by reference to the same exhibit filed with our Form 10-Q for the period
ended June 30, 2002.

****

Incorporated by reference to the same
exhibit filed with our Form 10-Q for the period ended September 30, 2002.

*****

Incorporated by reference to the same exhibit filed with our Registration Statement on Form 8-A, which was declared effective on March 11, 2003.

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*#

Incorporated by reference to the same exhibit filed
with our Form 10-K for the year ended December 31, 2002.



Confidential treatment granted for portions of these exhibits.



Confidential treatment requested for portions of this exhibit.

(b)

Reports on Forms 8-K.

On February 26, 2003, we filed a report on Form 8-K under Item 5 disclosing that our Board of Directors adopted a Stockholders Rights Plan on
February 25, 2003.

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SIGNATURE

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



|                   |  |  |                     | THERASENSE, INC.(Registrant)                                                                                    
|------------------ |  |  | ------------------- | ----------------------------------------------------------------------------------------------------------------
|Date: May 14, 2003 |  |  | /s/ CHARLEST.LIAMOS
|                   |  |  |                    
|                   |  |  |                     | Charles T. LiamosChief Financial Officer and Chief Operating Officer(Principal Financial and
Accounting Officer)



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##### Table of Contents

CERTIFICATIONS

I, W. Mark Lortz, certify that:

1.

I have reviewed this quarterly report on Form 10-Q of
TheraSense, Inc., a Delaware 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 functions):

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.



|Date: May 14, 2003 |                                      |  | 
|------------------ | ------------------------------------ |  | 
|                   | /s/ W.MARKLORTZ                      |  | 
|                   |                                      |  | 
|                   | W. Mark LortzChief Executive Officer |  | 



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##### Table of Contents

I, Charles T. Liamos, certify that:

1.

I have reviewed this quarterly report on Form 10-Q of TheraSense, Inc., a Delaware 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:

d)

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;

e)

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

f)

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 functions):

b)

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.



|Date: May 14, 2003 |                                          |  | 
|------------------ | ---------------------------------------- |  | 
|                   | /s/ CHARLEST.LIAMOS                      |  | 
|                   |                                          |  | 
|                   | Charles T. LiamosChief Financial Officer |  | 

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